1.30.0

Fixes https://github.com/matrix-org/synapse/issues/9572

When a SSO user logs in for the first time, we create a local Matrix user for them. This goes through the register_user flow, which ends up triggering the spam checker. Spam checker modules don't currently have any way to differentiate between a user trying to sign up initially, versus an SSO user (whom has presumably already been approved elsewhere) trying to log in for the first time.

This PR passes `auth_provider_id` as an argument to the `check_registration_for_spam` function. This argument will contain an ID of an SSO provider (`"saml"`, `"cas"`, etc.) if one was used, else `None`.

.circleci/config.yml

@@ -14,7 +14,7 @@ jobs:
           platforms: linux/amd64
       - docker_build:
           tag: -t matrixdotorg/synapse:${CIRCLE_TAG}
-          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          platforms: linux/amd64,linux/arm64
 
   dockerhubuploadlatest:
     docker:
@@ -27,7 +27,7 @@ jobs:
       # until all of the platforms are built.
       - docker_build:
           tag: -t matrixdotorg/synapse:latest
-          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          platforms: linux/amd64,linux/arm64
 
 workflows:
   build:

.git-blame-ignore-revs

@@ -0,0 +1,8 @@
+# Black reformatting (#5482).
+32e7c9e7f20b57dd081023ac42d6931a8da9b3a3
+
+# Target Python 3.5 with black (#8664).
+aff1eb7c671b0a3813407321d2702ec46c71fa56
+
+# Update black to 20.8b1 (#9381).
+0a00b7ff14890987f09112a2ae696c61001e6cf1

.gitignore

@@ -6,13 +6,14 @@
 *.egg
 *.egg-info
 *.lock
-*.pyc
+*.py[cod]
 *.snap
 *.tac
 _trial_temp/
 _trial_temp*/
 /out
 .DS_Store
+__pycache__/
 
 # stuff that is likely to exist when you run a server locally
 /*.db

CHANGES.md

@@ -1,13 +1,290 @@
-Synapse 1.27.0rc1 (2021-02-02)
+Synapse 1.30.0 (2021-03-22)
+===========================
+
+Note that this release deprecates the ability for appservices to
+call `POST /_matrix/client/r0/register`  without the body parameter `type`. Appservice
+developers should use a `type` value of `m.login.application_service` as
+per [the spec](https://matrix.org/docs/spec/application_service/r0.1.2#server-admin-style-permissions).
+In future releases, calling this endpoint with an access token - but without a `m.login.application_service`
+type - will fail.
+
+
+No significant changes.
+
+
+Synapse 1.30.0rc1 (2021-03-16)
 ==============================
 
-Note that this release includes a change in Synapse to use Redis as a cache ─ as well as a pub/sub mechanism ─ if Redis support is enabled. No action is needed by server administrators, and we do not expect resource usage of the Redis instance to change dramatically.
+Features
+--------
 
-This release also changes the callback URI for OpenID Connect (OIDC) identity providers. If your server is configured to use single sign-on via an OIDC/OAuth2 IdP, you may need to make configuration changes. Please review [UPGRADE.rst](UPGRADE.rst) for more details on these changes.
+- Add prometheus metrics for number of users successfully registering and logging in. ([\#9510](https://github.com/matrix-org/synapse/issues/9510), [\#9511](https://github.com/matrix-org/synapse/issues/9511), [\#9573](https://github.com/matrix-org/synapse/issues/9573))
+- Add `synapse_federation_last_sent_pdu_time` and `synapse_federation_last_received_pdu_time` prometheus metrics, which monitor federation delays by reporting the timestamps of messages sent and received to a set of remote servers. ([\#9540](https://github.com/matrix-org/synapse/issues/9540))
+- Add support for generating JSON Web Tokens dynamically for use as OIDC client secrets. ([\#9549](https://github.com/matrix-org/synapse/issues/9549))
+- Optimise handling of incomplete room history for incoming federation. ([\#9601](https://github.com/matrix-org/synapse/issues/9601))
+- Finalise support for allowing clients to pick an SSO Identity Provider ([MSC2858](https://github.com/matrix-org/matrix-doc/pull/2858)). ([\#9617](https://github.com/matrix-org/synapse/issues/9617))
+- Tell spam checker modules about the SSO IdP a user registered through if one was used. ([\#9626](https://github.com/matrix-org/synapse/issues/9626))
+
+
+Bugfixes
+--------
+
+- Fix long-standing bug when generating thumbnails for some images with transparency: `TypeError: cannot unpack non-iterable int object`. ([\#9473](https://github.com/matrix-org/synapse/issues/9473))
+- Purge chain cover indexes for events that were purged prior to Synapse v1.29.0. ([\#9542](https://github.com/matrix-org/synapse/issues/9542), [\#9583](https://github.com/matrix-org/synapse/issues/9583))
+- Fix bug where federation requests were not correctly retried on 5xx responses. ([\#9567](https://github.com/matrix-org/synapse/issues/9567))
+- Fix re-activating an account via the admin API when local passwords are disabled. ([\#9587](https://github.com/matrix-org/synapse/issues/9587))
+- Fix a bug introduced in Synapse 1.20 which caused incoming federation transactions to stack up, causing slow recovery from outages. ([\#9597](https://github.com/matrix-org/synapse/issues/9597))
+- Fix a bug introduced in v1.28.0 where the OpenID Connect callback endpoint could error with a `MacaroonInitException`. ([\#9620](https://github.com/matrix-org/synapse/issues/9620))
+- Fix Internal Server Error on `GET /_synapse/client/saml2/authn_response` request. ([\#9623](https://github.com/matrix-org/synapse/issues/9623))
+
+
+Updates to the Docker image
+---------------------------
+
+- Make use of an improved malloc implementation (`jemalloc`) in the docker image. ([\#8553](https://github.com/matrix-org/synapse/issues/8553))
+
+
+Improved Documentation
+----------------------
+
+- Add relayd entry to reverse proxy example configurations. ([\#9508](https://github.com/matrix-org/synapse/issues/9508))
+- Improve the SAML2 upgrade notes for 1.27.0. ([\#9550](https://github.com/matrix-org/synapse/issues/9550))
+- Link to the "List user's media" admin API from the media admin API docs. ([\#9571](https://github.com/matrix-org/synapse/issues/9571))
+- Clarify the spam checker modules documentation example to mention that `parse_config` is a required method. ([\#9580](https://github.com/matrix-org/synapse/issues/9580))
+- Clarify the sample configuration for `stats` settings. ([\#9604](https://github.com/matrix-org/synapse/issues/9604))
+
+
+Deprecations and Removals
+-------------------------
+
+- The `synapse_federation_last_sent_pdu_age` and `synapse_federation_last_received_pdu_age` prometheus metrics have been removed. They are replaced by `synapse_federation_last_sent_pdu_time` and `synapse_federation_last_received_pdu_time`. ([\#9540](https://github.com/matrix-org/synapse/issues/9540))
+- Registering an Application Service user without using the `m.login.application_service` login type will be unsupported in an upcoming Synapse release. ([\#9559](https://github.com/matrix-org/synapse/issues/9559))
+
+
+Internal Changes
+----------------
+
+- Add tests to ResponseCache. ([\#9458](https://github.com/matrix-org/synapse/issues/9458))
+- Add type hints to purge room and server notice admin API. ([\#9520](https://github.com/matrix-org/synapse/issues/9520))
+- Add extra logging to ObservableDeferred when callbacks throw exceptions. ([\#9523](https://github.com/matrix-org/synapse/issues/9523))
+- Fix incorrect type hints. ([\#9528](https://github.com/matrix-org/synapse/issues/9528), [\#9543](https://github.com/matrix-org/synapse/issues/9543), [\#9591](https://github.com/matrix-org/synapse/issues/9591), [\#9608](https://github.com/matrix-org/synapse/issues/9608), [\#9618](https://github.com/matrix-org/synapse/issues/9618))
+- Add an additional test for purging a room. ([\#9541](https://github.com/matrix-org/synapse/issues/9541))
+- Add a `.git-blame-ignore-revs` file with the hashes of auto-formatting. ([\#9560](https://github.com/matrix-org/synapse/issues/9560))
+- Increase the threshold before which outbound federation to a server goes into "catch up" mode, which is expensive for the remote server to handle. ([\#9561](https://github.com/matrix-org/synapse/issues/9561))
+- Fix spurious errors reported by the `config-lint.sh` script. ([\#9562](https://github.com/matrix-org/synapse/issues/9562))
+- Fix type hints and tests for BlacklistingAgentWrapper and BlacklistingReactorWrapper. ([\#9563](https://github.com/matrix-org/synapse/issues/9563))
+- Do not have mypy ignore type hints from unpaddedbase64. ([\#9568](https://github.com/matrix-org/synapse/issues/9568))
+- Improve efficiency of calculating the auth chain in large rooms. ([\#9576](https://github.com/matrix-org/synapse/issues/9576))
+- Convert `synapse.types.Requester` to an `attrs` class. ([\#9586](https://github.com/matrix-org/synapse/issues/9586))
+- Add logging for redis connection setup. ([\#9590](https://github.com/matrix-org/synapse/issues/9590))
+- Improve logging when processing incoming transactions. ([\#9596](https://github.com/matrix-org/synapse/issues/9596))
+- Remove unused `stats.retention` setting, and emit a warning if stats are disabled. ([\#9604](https://github.com/matrix-org/synapse/issues/9604))
+- Prevent attempting to bundle aggregations for state events in /context APIs. ([\#9619](https://github.com/matrix-org/synapse/issues/9619))
+
+
+Synapse 1.29.0 (2021-03-08)
+===========================
+
+Note that synapse now expects an `X-Forwarded-Proto` header when used with a reverse proxy. Please see [UPGRADE.rst](UPGRADE.rst#upgrading-to-v1290) for more details on this change.
+
+
+No significant changes.
+
+
+Synapse 1.29.0rc1 (2021-03-04)
+==============================
+
+Features
+--------
+
+- Add rate limiters to cross-user key sharing requests. ([\#8957](https://github.com/matrix-org/synapse/issues/8957))
+- Add `order_by` to the admin API `GET /_synapse/admin/v1/users/<user_id>/media`. Contributed by @dklimpel. ([\#8978](https://github.com/matrix-org/synapse/issues/8978))
+- Add some configuration settings to make users' profile data more private. ([\#9203](https://github.com/matrix-org/synapse/issues/9203))
+- The `no_proxy` and `NO_PROXY` environment variables are now respected in proxied HTTP clients with the lowercase form taking precedence if both are present. Additionally, the lowercase `https_proxy` environment variable is now respected in proxied HTTP clients on top of existing support for the uppercase `HTTPS_PROXY` form and takes precedence if both are present. Contributed by Timothy Leung. ([\#9372](https://github.com/matrix-org/synapse/issues/9372))
+- Add a configuration option, `user_directory.prefer_local_users`, which when enabled will make it more likely for users on the same server as you to appear above other users. ([\#9383](https://github.com/matrix-org/synapse/issues/9383), [\#9385](https://github.com/matrix-org/synapse/issues/9385))
+- Add support for regenerating thumbnails if they have been deleted but the original image is still stored. ([\#9438](https://github.com/matrix-org/synapse/issues/9438))
+- Add support for `X-Forwarded-Proto` header when using a reverse proxy. ([\#9472](https://github.com/matrix-org/synapse/issues/9472), [\#9501](https://github.com/matrix-org/synapse/issues/9501), [\#9512](https://github.com/matrix-org/synapse/issues/9512), [\#9539](https://github.com/matrix-org/synapse/issues/9539))
+
+
+Bugfixes
+--------
+
+- Fix a bug where users' pushers were not all deleted when they deactivated their account. ([\#9285](https://github.com/matrix-org/synapse/issues/9285), [\#9516](https://github.com/matrix-org/synapse/issues/9516))
+- Fix a bug where a lot of unnecessary presence updates were sent when joining a room. ([\#9402](https://github.com/matrix-org/synapse/issues/9402))
+- Fix a bug that caused multiple calls to the experimental `shared_rooms` endpoint to return stale results. ([\#9416](https://github.com/matrix-org/synapse/issues/9416))
+- Fix a bug in single sign-on which could cause a "No session cookie found" error. ([\#9436](https://github.com/matrix-org/synapse/issues/9436))
+- Fix bug introduced in v1.27.0 where allowing a user to choose their own username when logging in via single sign-on did not work unless an `idp_icon` was defined. ([\#9440](https://github.com/matrix-org/synapse/issues/9440))
+- Fix a bug introduced in v1.26.0 where some sequences were not properly configured when running `synapse_port_db`. ([\#9449](https://github.com/matrix-org/synapse/issues/9449))
+- Fix deleting pushers when using sharded pushers. ([\#9465](https://github.com/matrix-org/synapse/issues/9465), [\#9466](https://github.com/matrix-org/synapse/issues/9466), [\#9479](https://github.com/matrix-org/synapse/issues/9479), [\#9536](https://github.com/matrix-org/synapse/issues/9536))
+- Fix missing startup checks for the consistency of certain PostgreSQL sequences. ([\#9470](https://github.com/matrix-org/synapse/issues/9470))
+- Fix a long-standing bug where the media repository could leak file descriptors while previewing media. ([\#9497](https://github.com/matrix-org/synapse/issues/9497))
+- Properly purge the event chain cover index when purging history. ([\#9498](https://github.com/matrix-org/synapse/issues/9498))
+- Fix missing chain cover index due to a schema delta not being applied correctly. Only affected servers that ran development versions. ([\#9503](https://github.com/matrix-org/synapse/issues/9503))
+- Fix a bug introduced in v1.25.0 where `/_synapse/admin/join/` would fail when given a room alias. ([\#9506](https://github.com/matrix-org/synapse/issues/9506))
+- Prevent presence background jobs from running when presence is disabled. ([\#9530](https://github.com/matrix-org/synapse/issues/9530))
+- Fix rare edge case that caused a background update to fail if the server had rejected an event that had duplicate auth events. ([\#9537](https://github.com/matrix-org/synapse/issues/9537))
+
+
+Improved Documentation
+----------------------
+
+- Update the example systemd config to propagate reloads to individual units. ([\#9463](https://github.com/matrix-org/synapse/issues/9463))
+
+
+Internal Changes
+----------------
+
+- Add documentation and type hints to `parse_duration`. ([\#9432](https://github.com/matrix-org/synapse/issues/9432))
+- Remove vestiges of `uploads_path` configuration setting. ([\#9462](https://github.com/matrix-org/synapse/issues/9462))
+- Add a comment about systemd-python. ([\#9464](https://github.com/matrix-org/synapse/issues/9464))
+- Test that we require validated email for email pushers. ([\#9496](https://github.com/matrix-org/synapse/issues/9496))
+- Allow python to generate bytecode for synapse. ([\#9502](https://github.com/matrix-org/synapse/issues/9502))
+- Fix incorrect type hints. ([\#9515](https://github.com/matrix-org/synapse/issues/9515), [\#9518](https://github.com/matrix-org/synapse/issues/9518))
+- Add type hints to device and event report admin API. ([\#9519](https://github.com/matrix-org/synapse/issues/9519))
+- Add type hints to user admin API. ([\#9521](https://github.com/matrix-org/synapse/issues/9521))
+- Bump the versions of mypy and mypy-zope used for static type checking. ([\#9529](https://github.com/matrix-org/synapse/issues/9529))
+
+
+Synapse 1.28.0 (2021-02-25)
+===========================
+
+Note that this release drops support for ARMv7 in the official Docker images, due to repeated problems building for ARMv7 (and the associated maintenance burden this entails).
+
+This release also fixes the documentation included in v1.27.0 around the callback URI for SAML2 identity providers. If your server is configured to use single sign-on via a SAML2 IdP, you may need to make configuration changes. Please review [UPGRADE.rst](UPGRADE.rst) for more details on these changes.
+
+
+Internal Changes
+----------------
+
+- Revert change in v1.28.0rc1 to remove the deprecated SAML endpoint. ([\#9474](https://github.com/matrix-org/synapse/issues/9474))
+
+
+Synapse 1.28.0rc1 (2021-02-19)
+==============================
+
+Removal warning
+---------------
+
+The v1 list accounts API is deprecated and will be removed in a future release.
+This API was undocumented and misleading. It can be replaced by the
+[v2 list accounts API](https://github.com/matrix-org/synapse/blob/release-v1.28.0/docs/admin_api/user_admin_api.rst#list-accounts),
+which has been available since Synapse 1.7.0 (2019-12-13).
+
+Please check if you're using any scripts which use the admin API and replace
+`GET /_synapse/admin/v1/users/<user_id>` with `GET /_synapse/admin/v2/users`.
+
+
+Features
+--------
+
+- New admin API to get the context of an event: `/_synapse/admin/rooms/{roomId}/context/{eventId}`. ([\#9150](https://github.com/matrix-org/synapse/issues/9150))
+- Further improvements to the user experience of registration via single sign-on. ([\#9300](https://github.com/matrix-org/synapse/issues/9300), [\#9301](https://github.com/matrix-org/synapse/issues/9301))
+- Add hook to spam checker modules that allow checking file uploads and remote downloads. ([\#9311](https://github.com/matrix-org/synapse/issues/9311))
+- Add support for receiving OpenID Connect authentication responses via form `POST`s rather than `GET`s. ([\#9376](https://github.com/matrix-org/synapse/issues/9376))
+- Add the shadow-banning status to the admin API for user info. ([\#9400](https://github.com/matrix-org/synapse/issues/9400))
+
+
+Bugfixes
+--------
+
+- Fix long-standing bug where sending email notifications would fail for rooms that the server had since left. ([\#9257](https://github.com/matrix-org/synapse/issues/9257))
+- Fix bug introduced in Synapse 1.27.0rc1 which meant the "session expired" error page during SSO registration was badly formatted. ([\#9296](https://github.com/matrix-org/synapse/issues/9296))
+- Assert a maximum length for some parameters for spec compliance. ([\#9321](https://github.com/matrix-org/synapse/issues/9321), [\#9393](https://github.com/matrix-org/synapse/issues/9393))
+- Fix additional errors when previewing URLs: "AttributeError 'NoneType' object has no attribute 'xpath'" and "ValueError: Unicode strings with encoding declaration are not supported. Please use bytes input or XML fragments without declaration.". ([\#9333](https://github.com/matrix-org/synapse/issues/9333))
+- Fix a bug causing Synapse to impose the wrong type constraints on fields when processing responses from appservices to `/_matrix/app/v1/thirdparty/user/{protocol}`. ([\#9361](https://github.com/matrix-org/synapse/issues/9361))
+- Fix bug where Synapse would occasionally stop reconnecting to Redis after the connection was lost. ([\#9391](https://github.com/matrix-org/synapse/issues/9391))
+- Fix a long-standing bug when upgrading a room: "TypeError: '>' not supported between instances of 'NoneType' and 'int'". ([\#9395](https://github.com/matrix-org/synapse/issues/9395))
+- Reduce the amount of memory used when generating the URL preview of a file that is larger than the `max_spider_size`. ([\#9421](https://github.com/matrix-org/synapse/issues/9421))
+- Fix a long-standing bug in the deduplication of old presence, resulting in no deduplication. ([\#9425](https://github.com/matrix-org/synapse/issues/9425))
+- The `ui_auth.session_timeout` config option can now be specified in terms of number of seconds/minutes/etc/. Contributed by Rishabh Arya. ([\#9426](https://github.com/matrix-org/synapse/issues/9426))
+- Fix a bug introduced in v1.27.0: "TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType." related to the user directory. ([\#9428](https://github.com/matrix-org/synapse/issues/9428))
+
+
+Updates to the Docker image
+---------------------------
+
+- Drop support for ARMv7 in Docker images. ([\#9433](https://github.com/matrix-org/synapse/issues/9433))
+
+
+Improved Documentation
+----------------------
+
+- Reorganize CHANGELOG.md. ([\#9281](https://github.com/matrix-org/synapse/issues/9281))
+- Add note to `auto_join_rooms` config option explaining existing rooms must be publicly joinable. ([\#9291](https://github.com/matrix-org/synapse/issues/9291))
+- Correct name of Synapse's service file in TURN howto. ([\#9308](https://github.com/matrix-org/synapse/issues/9308))
+- Fix the braces in the `oidc_providers` section of the sample config. ([\#9317](https://github.com/matrix-org/synapse/issues/9317))
+- Update installation instructions on Fedora. ([\#9322](https://github.com/matrix-org/synapse/issues/9322))
+- Add HTTP/2 support to the nginx example configuration. Contributed by David Vo. ([\#9390](https://github.com/matrix-org/synapse/issues/9390))
+- Update docs for using Gitea as OpenID provider. ([\#9404](https://github.com/matrix-org/synapse/issues/9404))
+- Document that pusher instances are shardable. ([\#9407](https://github.com/matrix-org/synapse/issues/9407))
+- Fix erroneous documentation from v1.27.0 about updating the SAML2 callback URL. ([\#9434](https://github.com/matrix-org/synapse/issues/9434))
+
+
+Deprecations and Removals
+-------------------------
+
+- Deprecate old admin API `GET /_synapse/admin/v1/users/<user_id>`. ([\#9429](https://github.com/matrix-org/synapse/issues/9429))
+
+
+Internal Changes
+----------------
+
+- Fix 'object name reserved for internal use' errors with recent versions of SQLite. ([\#9003](https://github.com/matrix-org/synapse/issues/9003))
+- Add experimental support for running Synapse with PyPy. ([\#9123](https://github.com/matrix-org/synapse/issues/9123))
+- Deny access to additional IP addresses by default. ([\#9240](https://github.com/matrix-org/synapse/issues/9240))
+- Update the `Cursor` type hints to better match PEP 249. ([\#9299](https://github.com/matrix-org/synapse/issues/9299))
+- Add debug logging for SRV lookups. Contributed by @Bubu. ([\#9305](https://github.com/matrix-org/synapse/issues/9305))
+- Improve logging for OIDC login flow. ([\#9307](https://github.com/matrix-org/synapse/issues/9307))
+- Share the code for handling required attributes between the CAS and SAML handlers. ([\#9326](https://github.com/matrix-org/synapse/issues/9326))
+- Clean up the code to load the metadata for OpenID Connect identity providers. ([\#9362](https://github.com/matrix-org/synapse/issues/9362))
+- Convert tests to use `HomeserverTestCase`. ([\#9377](https://github.com/matrix-org/synapse/issues/9377), [\#9396](https://github.com/matrix-org/synapse/issues/9396))
+- Update the version of black used to 20.8b1. ([\#9381](https://github.com/matrix-org/synapse/issues/9381))
+- Allow OIDC config to override discovered values. ([\#9384](https://github.com/matrix-org/synapse/issues/9384))
+- Remove some dead code from the acceptance of room invites path. ([\#9394](https://github.com/matrix-org/synapse/issues/9394))
+- Clean up an unused method in the presence handler code. ([\#9408](https://github.com/matrix-org/synapse/issues/9408))
+
+
+Synapse 1.27.0 (2021-02-16)
+===========================
+
+Note that this release includes a change in Synapse to use Redis as a cache ─ as well as a pub/sub mechanism ─ if Redis support is enabled for workers. No action is needed by server administrators, and we do not expect resource usage of the Redis instance to change dramatically.
+
+This release also changes the callback URI for OpenID Connect (OIDC) and SAML2 identity providers. If your server is configured to use single sign-on via an OIDC/OAuth2 or SAML2 IdP, you may need to make configuration changes. Please review [UPGRADE.rst](UPGRADE.rst) for more details on these changes.
 
 This release also changes escaping of variables in the HTML templates for SSO or email notifications. If you have customised these templates, please review [UPGRADE.rst](UPGRADE.rst) for more details on these changes.
 
 
+Bugfixes
+--------
+
+- Fix building Docker images for armv7. ([\#9405](https://github.com/matrix-org/synapse/issues/9405))
+
+
+Synapse 1.27.0rc2 (2021-02-11)
+==============================
+
+Features
+--------
+
+- Further improvements to the user experience of registration via single sign-on. ([\#9297](https://github.com/matrix-org/synapse/issues/9297))
+
+
+Bugfixes
+--------
+
+- Fix ratelimiting introduced in v1.27.0rc1 for invites to respect the `ratelimit` flag on application services. ([\#9302](https://github.com/matrix-org/synapse/issues/9302))
+- Do not automatically calculate `public_baseurl` since it can be wrong in some situations. Reverts behaviour introduced in v1.26.0. ([\#9313](https://github.com/matrix-org/synapse/issues/9313))
+
+
+Improved Documentation
+----------------------
+
+- Clarify the sample configuration for changes made to the template loading code. ([\#9310](https://github.com/matrix-org/synapse/issues/9310))
+
+
+Synapse 1.27.0rc1 (2021-02-02)
+==============================
+
 Features
 --------
 

CONTRIBUTING.md

@@ -1,4 +1,31 @@
-# Contributing code to Synapse
+Welcome to Synapse
+
+This document aims to get you started with contributing to this repo! 
+
+- [1. Who can contribute to Synapse?](#1-who-can-contribute-to-synapse)
+- [2. What do I need?](#2-what-do-i-need)
+- [3. Get the source.](#3-get-the-source)
+- [4. Install the dependencies](#4-install-the-dependencies)
+  * [Under Unix (macOS, Linux, BSD, ...)](#under-unix-macos-linux-bsd-)
+  * [Under Windows](#under-windows)
+- [5. Get in touch.](#5-get-in-touch)
+- [6. Pick an issue.](#6-pick-an-issue)
+- [7. Turn coffee and documentation into code and documentation!](#7-turn-coffee-and-documentation-into-code-and-documentation)
+- [8. Test, test, test!](#8-test-test-test)
+  * [Run the linters.](#run-the-linters)
+  * [Run the unit tests.](#run-the-unit-tests)
+  * [Run the integration tests.](#run-the-integration-tests)
+- [9. Submit your patch.](#9-submit-your-patch)
+  * [Changelog](#changelog)
+    + [How do I know what to call the changelog file before I create the PR?](#how-do-i-know-what-to-call-the-changelog-file-before-i-create-the-pr)
+    + [Debian changelog](#debian-changelog)
+  * [Sign off](#sign-off)
+- [10. Turn feedback into better code.](#10-turn-feedback-into-better-code)
+- [11. Find a new issue.](#11-find-a-new-issue)
+- [Notes for maintainers on merging PRs etc](#notes-for-maintainers-on-merging-prs-etc)
+- [Conclusion](#conclusion)
+
+# 1. Who can contribute to Synapse?
 
 Everyone is welcome to contribute code to [matrix.org
 projects](https://github.com/matrix-org), provided that they are willing to
@@ -9,70 +36,179 @@ license the code under the same terms as the project's overall 'outbound'
 license - in our case, this is almost always Apache Software License v2 (see
 [LICENSE](LICENSE)).
 
-## How to contribute
+# 2. What do I need?
+
+The code of Synapse is written in Python 3. To do pretty much anything, you'll need [a recent version of Python 3](https://wiki.python.org/moin/BeginnersGuide/Download).
+
+The source code of Synapse is hosted on GitHub. You will also need [a recent version of git](https://github.com/git-guides/install-git).
+
+For some tests, you will need [a recent version of Docker](https://docs.docker.com/get-docker/).
+
+
+# 3. Get the source.
 
 The preferred and easiest way to contribute changes is to fork the relevant
-project on github, and then [create a pull request](
+project on GitHub, and then [create a pull request](
 https://help.github.com/articles/using-pull-requests/) to ask us to pull your
 changes into our repo.
 
-Some other points to follow:
+Please base your changes on the `develop` branch.
 
- * Please base your changes on the `develop` branch.
+```sh
+git clone git@github.com:YOUR_GITHUB_USER_NAME/synapse.git
+git checkout develop
+```
 
- * Please follow the [code style requirements](#code-style).
+If you need help getting started with git, this is beyond the scope of the document, but you
+can find many good git tutorials on the web.
 
- * Please include a [changelog entry](#changelog) with each PR.
+# 4. Install the dependencies
 
- * Please [sign off](#sign-off) your contribution.
+## Under Unix (macOS, Linux, BSD, ...)
 
- * Please keep an eye on the pull request for feedback from the [continuous
-   integration system](#continuous-integration-and-testing) and try to fix any
-   errors that come up.
+Once you have installed Python 3 and added the source, please open a terminal and
+setup a *virtualenv*, as follows:
 
- * If you need to [update your PR](#updating-your-pull-request), just add new
-   commits to your branch rather than rebasing.
+```sh
+cd path/where/you/have/cloned/the/repository
+python3 -m venv ./env
+source ./env/bin/activate
+pip install -e ".[all,lint,mypy,test]"
+pip install tox
+```
 
-## Code style
+This will install the developer dependencies for the project.
+
+## Under Windows
+
+TBD
+
+
+# 5. Get in touch.
+
+Join our developer community on Matrix: #synapse-dev:matrix.org !
+
+
+# 6. Pick an issue.
+
+Fix your favorite problem or perhaps find a [Good First Issue](https://github.com/matrix-org/synapse/issues?q=is%3Aopen+is%3Aissue+label%3A%22Good+First+Issue%22)
+to work on.
+
+
+# 7. Turn coffee and documentation into code and documentation!
 
 Synapse's code style is documented [here](docs/code_style.md). Please follow
 it, including the conventions for the [sample configuration
 file](docs/code_style.md#configuration-file-format).
 
-Many of the conventions are enforced by scripts which are run as part of the
-[continuous integration system](#continuous-integration-and-testing). To help
-check if you have followed the code style, you can run `scripts-dev/lint.sh`
-locally. You'll need python 3.6 or later, and to install a number of tools:
+There is a growing amount of documentation located in the [docs](docs)
+directory. This documentation is intended primarily for sysadmins running their
+own Synapse instance, as well as developers interacting externally with
+Synapse. [docs/dev](docs/dev) exists primarily to house documentation for
+Synapse developers. [docs/admin_api](docs/admin_api) houses documentation
+regarding Synapse's Admin API, which is used mostly by sysadmins and external
+service developers.
 
-```
-# Install the dependencies
-pip install -e ".[lint,mypy]"
+If you add new files added to either of these folders, please use [GitHub-Flavoured
+Markdown](https://guides.github.com/features/mastering-markdown/).
 
-# Run the linter script
+Some documentation also exists in [Synapse's GitHub
+Wiki](https://github.com/matrix-org/synapse/wiki), although this is primarily
+contributed to by community authors.
+
+
+# 8. Test, test, test!
+<a name="test-test-test"></a>
+
+While you're developing and before submitting a patch, you'll
+want to test your code.
+
+## Run the linters.
+
+The linters look at your code and do two things:
+
+- ensure that your code follows the coding style adopted by the project;
+- catch a number of errors in your code.
+
+They're pretty fast, don't hesitate!
+
+```sh
+source ./env/bin/activate
 ./scripts-dev/lint.sh
 ```
 
-**Note that the script does not just test/check, but also reformats code, so you
-may wish to ensure any new code is committed first**.
+Note that this script *will modify your files* to fix styling errors.
+Make sure that you have saved all your files.
 
-By default, this script checks all files and can take some time; if you alter
-only certain files, you might wish to specify paths as arguments to reduce the
-run-time:
+If you wish to restrict the linters to only the files changed since the last commit
+(much faster!), you can instead run:
 
+```sh
+source ./env/bin/activate
+./scripts-dev/lint.sh -d
 ```
+
+Or if you know exactly which files you wish to lint, you can instead run:
+
+```sh
+source ./env/bin/activate
 ./scripts-dev/lint.sh path/to/file1.py path/to/file2.py path/to/folder
 ```
 
-You can also provide the `-d` option, which will lint the files that have been
-changed since the last git commit. This will often be significantly faster than
-linting the whole codebase.
+## Run the unit tests.
 
-Before pushing new changes, ensure they don't produce linting errors. Commit any
-files that were corrected.
+The unit tests run parts of Synapse, including your changes, to see if anything
+was broken. They are slower than the linters but will typically catch more errors.
+
+```sh
+source ./env/bin/activate
+trial tests
+```
+
+If you wish to only run *some* unit tests, you may specify
+another module instead of `tests` - or a test class or a method:
+
+```sh
+source ./env/bin/activate
+trial tests.rest.admin.test_room tests.handlers.test_admin.ExfiltrateData.test_invite
+```
+
+If your tests fail, you may wish to look at the logs:
+
+```sh
+less _trial_temp/test.log
+```
+
+## Run the integration tests.
+
+The integration tests are a more comprehensive suite of tests. They
+run a full version of Synapse, including your changes, to check if
+anything was broken. They are slower than the unit tests but will
+typically catch more errors.
+
+The following command will let you run the integration test with the most common
+configuration:
+
+```sh
+$ docker run --rm -it -v /path/where/you/have/cloned/the/repository\:/src:ro -v /path/to/where/you/want/logs\:/logs matrixdotorg/sytest-synapse:py37
+```
+
+This configuration should generally cover  your needs. For more details about other configurations, see [documentation in the SyTest repo](https://github.com/matrix-org/sytest/blob/develop/docker/README.md).
+
+
+# 9. Submit your patch.
+
+Once you're happy with your patch, it's time to prepare a Pull Request.
+
+To prepare a Pull Request, please:
+
+1. verify that [all the tests pass](#test-test-test), including the coding style;
+2. [sign off](#sign-off) your contribution;
+3. `git push` your commit to your fork of Synapse;
+4. on GitHub, [create the Pull Request](https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/creating-a-pull-request);
+5. add a [changelog entry](#changelog) and push it to your Pull Request;
+6. for most contributors, that's all - however, if you are a member of the organization `matrix-org`, on GitHub, please request a review from `matrix.org / Synapse Core`.
 
-Please ensure your changes match the cosmetic style of the existing project,
-and **never** mix cosmetic and functional changes in the same commit, as it
-makes it horribly hard to review otherwise.
 
 ## Changelog
 
@@ -156,24 +292,6 @@ directory, you will need both a regular newsfragment *and* an entry in the
 debian changelog. (Though typically such changes should be submitted as two
 separate pull requests.)
 
-## Documentation
-
-There is a growing amount of documentation located in the [docs](docs)
-directory. This documentation is intended primarily for sysadmins running their
-own Synapse instance, as well as developers interacting externally with
-Synapse. [docs/dev](docs/dev) exists primarily to house documentation for
-Synapse developers. [docs/admin_api](docs/admin_api) houses documentation
-regarding Synapse's Admin API, which is used mostly by sysadmins and external
-service developers.
-
-New files added to both folders should be written in [Github-Flavoured
-Markdown](https://guides.github.com/features/mastering-markdown/), and attempts
-should be made to migrate existing documents to markdown where possible.
-
-Some documentation also exists in [Synapse's Github
-Wiki](https://github.com/matrix-org/synapse/wiki), although this is primarily
-contributed to by community authors.
-
 ## Sign off
 
 In order to have a concrete record that your contribution is intentional
@@ -240,47 +358,36 @@ Git allows you to add this signoff automatically when using the `-s`
 flag to `git commit`, which uses the name and email set in your
 `user.name` and `user.email` git configs.
 
-## Continuous integration and testing
 
-[Buildkite](https://buildkite.com/matrix-dot-org/synapse) will automatically
-run a series of checks and tests against any PR which is opened against the
-project; if your change breaks the build, this will be shown in GitHub, with
-links to the build results. If your build fails, please try to fix the errors
-and update your branch.
+# 10. Turn feedback into better code.
 
-To run unit tests in a local development environment, you can use:
+Once the Pull Request is opened, you will see a few things:
 
-- ``tox -e py35`` (requires tox to be installed by ``pip install tox``)
-  for SQLite-backed Synapse on Python 3.5.
-- ``tox -e py36`` for SQLite-backed Synapse on Python 3.6.
-- ``tox -e py36-postgres`` for PostgreSQL-backed Synapse on Python 3.6
-  (requires a running local PostgreSQL with access to create databases).
-- ``./test_postgresql.sh`` for PostgreSQL-backed Synapse on Python 3.5
-  (requires Docker). Entirely self-contained, recommended if you don't want to
-  set up PostgreSQL yourself.
+1. our automated CI (Continuous Integration) pipeline will run (again) the linters, the unit tests, the integration tests and more;
+2. one or more of the developers will take a look at your Pull Request and offer feedback.
 
-Docker images are available for running the integration tests (SyTest) locally,
-see the [documentation in the SyTest repo](
-https://github.com/matrix-org/sytest/blob/develop/docker/README.md) for more
-information.
+From this point, you should:
 
-## Updating your pull request
+1. Look at the results of the CI pipeline.
+   - If there is any error, fix the error.
+2. If a developer has requested changes, make these changes and let us know if it is ready for a developer to review again.
+3. Create a new commit with the changes.
+   - Please do NOT overwrite the history. New commits make the reviewer's life easier.
+   - Push this commits to your Pull Request.
+4. Back to 1.
 
-If you decide to make changes to your pull request - perhaps to address issues
-raised in a review, or to fix problems highlighted by [continuous
-integration](#continuous-integration-and-testing) - just add new commits to your
-branch, and push to GitHub. The pull request will automatically be updated.
+Once both the CI and the developers are happy, the patch will be merged into Synapse and released shortly!
 
-Please **avoid** rebasing your branch, especially once the PR has been
-reviewed: doing so makes it very difficult for a reviewer to see what has
-changed since a previous review.
+# 11. Find a new issue.
 
-## Notes for maintainers on merging PRs etc
+By now, you know the drill!
+
+# Notes for maintainers on merging PRs etc
 
 There are some notes for those with commit access to the project on how we
 manage git [here](docs/dev/git.md).
 
-## Conclusion
+# Conclusion
 
 That's it! Matrix is a very open and collaborative project as you might expect
 given our obsession with open communication. If we're going to successfully

INSTALL.md

@@ -151,29 +151,15 @@ sudo pacman -S base-devel python python-pip \
 
 ##### CentOS/Fedora
 
-Installing prerequisites on CentOS 8 or Fedora>26:
+Installing prerequisites on CentOS or Fedora Linux:
 
 ```sh
 sudo dnf install libtiff-devel libjpeg-devel libzip-devel freetype-devel \
-                 libwebp-devel tk-devel redhat-rpm-config \
-                 python3-virtualenv libffi-devel openssl-devel
+                 libwebp-devel libxml2-devel libxslt-devel libpq-devel \
+                 python3-virtualenv libffi-devel openssl-devel python3-devel
 sudo dnf groupinstall "Development Tools"
 ```
 
-Installing prerequisites on CentOS 7 or Fedora<=25:
-
-```sh
-sudo yum install libtiff-devel libjpeg-devel libzip-devel freetype-devel \
-                 lcms2-devel libwebp-devel tcl-devel tk-devel redhat-rpm-config \
-                 python3-virtualenv libffi-devel openssl-devel
-sudo yum groupinstall "Development Tools"
-```
-
-Note that Synapse does not support versions of SQLite before 3.11, and CentOS 7
-uses SQLite 3.7. You may be able to work around this by installing a more
-recent SQLite version, but it is recommended that you instead use a Postgres
-database: see [docs/postgres.md](docs/postgres.md).
-
 ##### macOS
 
 Installing prerequisites on macOS:

MANIFEST.in

@@ -20,9 +20,10 @@ recursive-include scripts *
 recursive-include scripts-dev *
 recursive-include synapse *.pyi
 recursive-include tests *.py
-include tests/http/ca.crt
-include tests/http/ca.key
-include tests/http/server.key
+recursive-include tests *.pem
+recursive-include tests *.p8
+recursive-include tests *.crt
+recursive-include tests *.key
 
 recursive-include synapse/res *
 recursive-include synapse/static *.css

README.rst

@@ -183,8 +183,9 @@ Using a reverse proxy with Synapse
 It is recommended to put a reverse proxy such as
 `nginx <https://nginx.org/en/docs/http/ngx_http_proxy_module.html>`_,
 `Apache <https://httpd.apache.org/docs/current/mod/mod_proxy_http.html>`_,
-`Caddy <https://caddyserver.com/docs/quick-starts/reverse-proxy>`_ or
-`HAProxy <https://www.haproxy.org/>`_ in front of Synapse. One advantage of
+`Caddy <https://caddyserver.com/docs/quick-starts/reverse-proxy>`_,
+`HAProxy <https://www.haproxy.org/>`_ or
+`relayd <https://man.openbsd.org/relayd.8>`_ in front of Synapse. One advantage of
 doing so is that it means that you can expose the default https port (443) to
 Matrix clients without needing to run Synapse with root privileges.
 

UPGRADE.rst

@@ -85,23 +85,51 @@ for example:
      wget https://packages.matrix.org/debian/pool/main/m/matrix-synapse-py3/matrix-synapse-py3_1.3.0+stretch1_amd64.deb
      dpkg -i matrix-synapse-py3_1.3.0+stretch1_amd64.deb
 
+Upgrading to v1.29.0
+====================
+
+Requirement for X-Forwarded-Proto header
+----------------------------------------
+
+When using Synapse with a reverse proxy (in particular, when using the
+`x_forwarded` option on an HTTP listener), Synapse now expects to receive an
+`X-Forwarded-Proto` header on incoming HTTP requests. If it is not set, Synapse
+will log a warning on each received request.
+
+To avoid the warning, administrators using a reverse proxy should ensure that
+the reverse proxy sets `X-Forwarded-Proto` header to `https` or `http` to
+indicate the protocol used by the client. See the `reverse proxy documentation
+<docs/reverse_proxy.md>`_, where the example configurations have been updated to
+show how to set this header.
+
+(Users of `Caddy <https://caddyserver.com/>`_ are unaffected, since we believe it
+sets `X-Forwarded-Proto` by default.)
+
 Upgrading to v1.27.0
 ====================
 
-Changes to callback URI for OAuth2 / OpenID Connect
----------------------------------------------------
+Changes to callback URI for OAuth2 / OpenID Connect and SAML2
+-------------------------------------------------------------
 
-This version changes the URI used for callbacks from OAuth2 identity providers. If
-your server is configured for single sign-on via an OpenID Connect or OAuth2 identity
-provider, you will need to add ``[synapse public baseurl]/_synapse/client/oidc/callback``
-to the list of permitted "redirect URIs" at the identity provider.
+This version changes the URI used for callbacks from OAuth2 and SAML2 identity providers:
 
-See `docs/openid.md <docs/openid.md>`_ for more information on setting up OpenID
-Connect.
+* If your server is configured for single sign-on via an OpenID Connect or OAuth2 identity
+  provider, you will need to add ``[synapse public baseurl]/_synapse/client/oidc/callback``
+  to the list of permitted "redirect URIs" at the identity provider.
 
-(Note: a similar change is being made for SAML2; in this case the old URI
-``[synapse public baseurl]/_matrix/saml2`` is being deprecated, but will continue to
-work, so no immediate changes are required for existing installations.)
+  See `docs/openid.md <docs/openid.md>`_ for more information on setting up OpenID
+  Connect.
+
+* If your server is configured for single sign-on via a SAML2 identity provider, you will
+  need to add ``[synapse public baseurl]/_synapse/client/saml2/authn_response`` as a permitted
+  "ACS location" (also known as "allowed callback URLs") at the identity provider.
+
+  The "Issuer" in the "AuthnRequest" to the SAML2 identity provider is also updated to
+  ``[synapse public baseurl]/_synapse/client/saml2/metadata.xml``. If your SAML2 identity
+  provider uses this property to validate or otherwise identify Synapse, its configuration
+  will need to be updated to use the new URL. Alternatively you could create a new, separate
+  "EntityDescriptor" in your SAML2 identity provider with the new URLs and leave the URLs in
+  the existing "EntityDescriptor" as they were.
 
 Changes to HTML templates
 -------------------------

contrib/cmdclient/console.py

@@ -92,7 +92,7 @@ class SynapseCmd(cmd.Cmd):
         return self.config["user"].split(":")[1]
 
     def do_config(self, line):
-        """ Show the config for this client: "config"
+        """Show the config for this client: "config"
         Edit a key value mapping: "config key value" e.g. "config token 1234"
         Config variables:
             user: The username to auth with.
@@ -360,7 +360,7 @@ class SynapseCmd(cmd.Cmd):
             print(e)
 
     def do_topic(self, line):
-        """"topic [set|get] <roomid> [<newtopic>]"
+        """ "topic [set|get] <roomid> [<newtopic>]"
         Set the topic for a room: topic set <roomid> <newtopic>
         Get the topic for a room: topic get <roomid>
         """
@@ -690,7 +690,7 @@ class SynapseCmd(cmd.Cmd):
         self._do_presence_state(2, line)
 
     def _parse(self, line, keys, force_keys=False):
-        """ Parses the given line.
+        """Parses the given line.
 
         Args:
             line : The line to parse
@@ -721,7 +721,7 @@ class SynapseCmd(cmd.Cmd):
         query_params={"access_token": None},
         alt_text=None,
     ):
-        """ Runs an HTTP request and pretty prints the output.
+        """Runs an HTTP request and pretty prints the output.
 
         Args:
             method: HTTP method

contrib/cmdclient/http.py

@@ -23,11 +23,10 @@ from twisted.web.http_headers import Headers
 
 
 class HttpClient:
-    """ Interface for talking json over http
-    """
+    """Interface for talking json over http"""
 
     def put_json(self, url, data):
-        """ Sends the specifed json data using PUT
+        """Sends the specifed json data using PUT
 
         Args:
             url (str): The URL to PUT data to.
@@ -41,7 +40,7 @@ class HttpClient:
         pass
 
     def get_json(self, url, args=None):
-        """ Gets some json from the given host homeserver and path
+        """Gets some json from the given host homeserver and path
 
         Args:
             url (str): The URL to GET data from.
@@ -58,7 +57,7 @@ class HttpClient:
 
 
 class TwistedHttpClient(HttpClient):
-    """ Wrapper around the twisted HTTP client api.
+    """Wrapper around the twisted HTTP client api.
 
     Attributes:
         agent (twisted.web.client.Agent): The twisted Agent used to send the
@@ -87,8 +86,7 @@ class TwistedHttpClient(HttpClient):
         defer.returnValue(json.loads(body))
 
     def _create_put_request(self, url, json_data, headers_dict={}):
-        """ Wrapper of _create_request to issue a PUT request
-        """
+        """Wrapper of _create_request to issue a PUT request"""
 
         if "Content-Type" not in headers_dict:
             raise defer.error(RuntimeError("Must include Content-Type header for PUTs"))
@@ -98,8 +96,7 @@ class TwistedHttpClient(HttpClient):
         )
 
     def _create_get_request(self, url, headers_dict={}):
-        """ Wrapper of _create_request to issue a GET request
-        """
+        """Wrapper of _create_request to issue a GET request"""
         return self._create_request("GET", url, headers_dict=headers_dict)
 
     @defer.inlineCallbacks
@@ -127,8 +124,7 @@ class TwistedHttpClient(HttpClient):
 
     @defer.inlineCallbacks
     def _create_request(self, method, url, producer=None, headers_dict={}):
-        """ Creates and sends a request to the given url
-        """
+        """Creates and sends a request to the given url"""
         headers_dict["User-Agent"] = ["Synapse Cmd Client"]
 
         retries_left = 5
@@ -185,8 +181,7 @@ class _RawProducer:
 
 
 class _JsonProducer:
-    """ Used by the twisted http client to create the HTTP body from json
-    """
+    """Used by the twisted http client to create the HTTP body from json"""
 
     def __init__(self, jsn):
         self.data = jsn

contrib/experiments/cursesio.py

@@ -63,8 +63,7 @@ class CursesStdIO:
         self.redraw()
 
     def redraw(self):
-        """ method for redisplaying lines
-            based on internal list of lines """
+        """method for redisplaying lines based on internal list of lines"""
 
         self.stdscr.clear()
         self.paintStatus(self.statusText)

contrib/experiments/test_messaging.py

@@ -56,7 +56,7 @@ def excpetion_errback(failure):
 
 
 class InputOutput:
-    """ This is responsible for basic I/O so that a user can interact with
+    """This is responsible for basic I/O so that a user can interact with
     the example app.
     """
 
@@ -68,8 +68,7 @@ class InputOutput:
         self.server = server
 
     def on_line(self, line):
-        """ This is where we process commands.
-        """
+        """This is where we process commands."""
 
         try:
             m = re.match(r"^join (\S+)$", line)
@@ -133,7 +132,7 @@ class IOLoggerHandler(logging.Handler):
 
 
 class Room:
-    """ Used to store (in memory) the current membership state of a room, and
+    """Used to store (in memory) the current membership state of a room, and
     which home servers we should send PDUs associated with the room to.
     """
 
@@ -148,8 +147,7 @@ class Room:
         self.have_got_metadata = False
 
     def add_participant(self, participant):
-        """ Someone has joined the room
-        """
+        """Someone has joined the room"""
         self.participants.add(participant)
         self.invited.discard(participant)
 
@@ -160,14 +158,13 @@ class Room:
             self.oldest_server = server
 
     def add_invited(self, invitee):
-        """ Someone has been invited to the room
-        """
+        """Someone has been invited to the room"""
         self.invited.add(invitee)
         self.servers.add(origin_from_ucid(invitee))
 
 
 class HomeServer(ReplicationHandler):
-    """ A very basic home server implentation that allows people to join a
+    """A very basic home server implentation that allows people to join a
     room and then invite other people.
     """
 
@@ -181,8 +178,7 @@ class HomeServer(ReplicationHandler):
         self.output = output
 
     def on_receive_pdu(self, pdu):
-        """ We just received a PDU
-        """
+        """We just received a PDU"""
         pdu_type = pdu.pdu_type
 
         if pdu_type == "sy.room.message":
@@ -199,23 +195,20 @@ class HomeServer(ReplicationHandler):
             )
 
     def _on_message(self, pdu):
-        """ We received a message
-        """
+        """We received a message"""
         self.output.print_line(
             "#%s %s %s" % (pdu.context, pdu.content["sender"], pdu.content["body"])
         )
 
     def _on_join(self, context, joinee):
-        """ Someone has joined a room, either a remote user or a local user
-        """
+        """Someone has joined a room, either a remote user or a local user"""
         room = self._get_or_create_room(context)
         room.add_participant(joinee)
 
         self.output.print_line("#%s %s %s" % (context, joinee, "*** JOINED"))
 
     def _on_invite(self, origin, context, invitee):
-        """ Someone has been invited
-        """
+        """Someone has been invited"""
         room = self._get_or_create_room(context)
         room.add_invited(invitee)
 
@@ -228,8 +221,7 @@ class HomeServer(ReplicationHandler):
 
     @defer.inlineCallbacks
     def send_message(self, room_name, sender, body):
-        """ Send a message to a room!
-        """
+        """Send a message to a room!"""
         destinations = yield self.get_servers_for_context(room_name)
 
         try:
@@ -247,8 +239,7 @@ class HomeServer(ReplicationHandler):
 
     @defer.inlineCallbacks
     def join_room(self, room_name, sender, joinee):
-        """ Join a room!
-        """
+        """Join a room!"""
         self._on_join(room_name, joinee)
 
         destinations = yield self.get_servers_for_context(room_name)
@@ -269,8 +260,7 @@ class HomeServer(ReplicationHandler):
 
     @defer.inlineCallbacks
     def invite_to_room(self, room_name, sender, invitee):
-        """ Invite someone to a room!
-        """
+        """Invite someone to a room!"""
         self._on_invite(self.server_name, room_name, invitee)
 
         destinations = yield self.get_servers_for_context(room_name)

contrib/jitsimeetbridge/jitsimeetbridge.py

@@ -193,15 +193,12 @@ class TrivialXmppClient:
         time.sleep(7)
         print("SSRC spammer started")
         while self.running:
-            ssrcMsg = (
-                "<presence to='%(tojid)s' xmlns='jabber:client'><x xmlns='http://jabber.org/protocol/muc'/><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://jitsi.org/jitsimeet' ver='0WkSdhFnAUxrz4ImQQLdB80GFlE='/><nick xmlns='http://jabber.org/protocol/nick'>%(nick)s</nick><stats xmlns='http://jitsi.org/jitmeet/stats'><stat name='bitrate_download' value='175'/><stat name='bitrate_upload' value='176'/><stat name='packetLoss_total' value='0'/><stat name='packetLoss_download' value='0'/><stat name='packetLoss_upload' value='0'/></stats><media xmlns='http://estos.de/ns/mjs'><source type='audio' ssrc='%(assrc)s' direction='sendre'/><source type='video' ssrc='%(vssrc)s' direction='sendre'/></media></presence>"
-                % {
-                    "tojid": "%s@%s/%s" % (ROOMNAME, ROOMDOMAIN, self.shortJid),
-                    "nick": self.userId,
-                    "assrc": self.ssrcs["audio"],
-                    "vssrc": self.ssrcs["video"],
-                }
-            )
+            ssrcMsg = "<presence to='%(tojid)s' xmlns='jabber:client'><x xmlns='http://jabber.org/protocol/muc'/><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://jitsi.org/jitsimeet' ver='0WkSdhFnAUxrz4ImQQLdB80GFlE='/><nick xmlns='http://jabber.org/protocol/nick'>%(nick)s</nick><stats xmlns='http://jitsi.org/jitmeet/stats'><stat name='bitrate_download' value='175'/><stat name='bitrate_upload' value='176'/><stat name='packetLoss_total' value='0'/><stat name='packetLoss_download' value='0'/><stat name='packetLoss_upload' value='0'/></stats><media xmlns='http://estos.de/ns/mjs'><source type='audio' ssrc='%(assrc)s' direction='sendre'/><source type='video' ssrc='%(vssrc)s' direction='sendre'/></media></presence>" % {
+                "tojid": "%s@%s/%s" % (ROOMNAME, ROOMDOMAIN, self.shortJid),
+                "nick": self.userId,
+                "assrc": self.ssrcs["audio"],
+                "vssrc": self.ssrcs["video"],
+            }
             res = self.sendIq(ssrcMsg)
             print("reply from ssrc announce: ", res)
             time.sleep(10)

debian/build_virtualenv

@@ -58,10 +58,10 @@ trap "rm -r $tmpdir" EXIT
 cp -r tests "$tmpdir"
 
 PYTHONPATH="$tmpdir" \
-    "${TARGET_PYTHON}" -B -m twisted.trial --reporter=text -j2 tests
+    "${TARGET_PYTHON}" -m twisted.trial --reporter=text -j2 tests
 
 # build the config file
-"${TARGET_PYTHON}" -B "${VIRTUALENV_DIR}/bin/generate_config" \
+"${TARGET_PYTHON}" "${VIRTUALENV_DIR}/bin/generate_config" \
         --config-dir="/etc/matrix-synapse" \
         --data-dir="/var/lib/matrix-synapse" |
     perl -pe '
@@ -87,7 +87,7 @@ PYTHONPATH="$tmpdir" \
 ' > "${PACKAGE_BUILD_DIR}/etc/matrix-synapse/homeserver.yaml"
 
 # build the log config file
-"${TARGET_PYTHON}" -B "${VIRTUALENV_DIR}/bin/generate_log_config" \
+"${TARGET_PYTHON}" "${VIRTUALENV_DIR}/bin/generate_log_config" \
         --output-file="${PACKAGE_BUILD_DIR}/etc/matrix-synapse/log.yaml"
 
 # add a dependency on the right version of python to substvars.

debian/changelog

@@ -1,8 +1,34 @@
-matrix-synapse-py3 (1.26.0+nmu1) UNRELEASED; urgency=medium
+matrix-synapse-py3 (1.30.0) stable; urgency=medium
 
+  * New synapse release 1.30.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Mon, 22 Mar 2021 13:15:34 +0000
+
+matrix-synapse-py3 (1.29.0) stable; urgency=medium
+
+  [ Jonathan de Jong ]
+  * Remove the python -B flag (don't generate bytecode) in scripts and documentation.
+
+  [ Synapse Packaging team ]
+  * New synapse release 1.29.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Mon, 08 Mar 2021 13:51:50 +0000
+
+matrix-synapse-py3 (1.28.0) stable; urgency=medium
+
+  * New synapse release 1.28.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Thu, 25 Feb 2021 10:21:57 +0000
+
+matrix-synapse-py3 (1.27.0) stable; urgency=medium
+
+  [ Dan Callahan ]
   * Fix build on Ubuntu 16.04 LTS (Xenial).
 
- -- Dan Callahan <danc@element.io>  Thu, 28 Jan 2021 16:21:03 +0000
+  [ Synapse Packaging team ]
+  * New synapse release 1.27.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 16 Feb 2021 13:11:28 +0000
 
 matrix-synapse-py3 (1.26.0) stable; urgency=medium
 

debian/synctl.1

@@ -44,7 +44,7 @@ Configuration file may be generated as follows:
 .
 .nf
 
-$ python \-B \-m synapse\.app\.homeserver \-c config\.yaml \-\-generate\-config \-\-server\-name=<server name>
+$ python \-m synapse\.app\.homeserver \-c config\.yaml \-\-generate\-config \-\-server\-name=<server name>
 .
 .fi
 .

debian/synctl.ronn

@@ -41,7 +41,7 @@ process.
 
 Configuration file may be generated as follows:
 
-    $ python -B -m synapse.app.homeserver -c config.yaml --generate-config --server-name=<server name>
+    $ python -m synapse.app.homeserver -c config.yaml --generate-config --server-name=<server name>
 
 ## ENVIRONMENT
 

docker/Dockerfile

@@ -28,11 +28,13 @@ RUN apt-get update && apt-get install -y \
     libwebp-dev \
     libxml++2.6-dev \
     libxslt1-dev \
+    rustc \
     zlib1g-dev \
  && rm -rf /var/lib/apt/lists/*
 
 # Build dependencies that are not available as wheels, to speed up rebuilds
 RUN pip install --prefix="/install" --no-warn-script-location \
+        cryptography \
         frozendict \
         jaeger-client \
         opentracing \
@@ -67,6 +69,7 @@ RUN apt-get update && apt-get install -y \
     libpq5 \
     libwebp6 \
     xmlsec1 \
+    libjemalloc2 \
  && rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder /install /usr/local

docker/README.md

@@ -11,7 +11,6 @@ The image also does *not* provide a TURN server.
 By default, the image expects a single volume, located at ``/data``, that will hold:
 
 * configuration files;
-* temporary files during uploads;
 * uploaded media and thumbnails;
 * the SQLite database if you do not configure postgres;
 * the appservices configuration.
@@ -205,3 +204,8 @@ healthcheck:
   timeout: 10s
   retries: 3
 ```
+
+## Using jemalloc
+
+Jemalloc is embedded in the image and will be used instead of the default allocator.
+You can read about jemalloc by reading the Synapse [README](../README.md)

docker/conf/homeserver.yaml

@@ -89,7 +89,6 @@ federation_rc_concurrent: 3
 ## Files ##
 
 media_store_path: "/data/media"
-uploads_path: "/data/uploads"
 max_upload_size: "{{ SYNAPSE_MAX_UPLOAD_SIZE or "50M" }}"
 max_image_pixels: "32M"
 dynamic_thumbnails: false

docker/start.py

@@ -3,6 +3,7 @@
 import codecs
 import glob
 import os
+import platform
 import subprocess
 import sys
 
@@ -213,6 +214,13 @@ def main(args, environ):
     if "-m" not in args:
         args = ["-m", synapse_worker] + args
 
+    jemallocpath = "/usr/lib/%s-linux-gnu/libjemalloc.so.2" % (platform.machine(),)
+
+    if os.path.isfile(jemallocpath):
+        environ["LD_PRELOAD"] = jemallocpath
+    else:
+        log("Could not find %s, will not use" % (jemallocpath,))
+
     # if there are no config files passed to synapse, try adding the default file
     if not any(p.startswith("--config-path") or p.startswith("-c") for p in args):
         config_dir = environ.get("SYNAPSE_CONFIG_DIR", "/data")
@@ -248,9 +256,9 @@ running with 'migrate_config'. See the README for more details.
     args = ["python"] + args
     if ownership is not None:
         args = ["gosu", ownership] + args
-        os.execv("/usr/sbin/gosu", args)
+        os.execve("/usr/sbin/gosu", args, environ)
     else:
-        os.execv("/usr/local/bin/python", args)
+        os.execve("/usr/local/bin/python", args, environ)
 
 
 if __name__ == "__main__":

docs/admin_api/media_admin_api.md

@@ -1,5 +1,7 @@
 # Contents
-- [List all media in a room](#list-all-media-in-a-room)
+- [Querying media](#querying-media)
+  * [List all media in a room](#list-all-media-in-a-room)
+  * [List all media uploaded by a user](#list-all-media-uploaded-by-a-user)
 - [Quarantine media](#quarantine-media)
   * [Quarantining media by ID](#quarantining-media-by-id)
   * [Quarantining media in a room](#quarantining-media-in-a-room)
@@ -10,7 +12,11 @@
   * [Delete local media by date or size](#delete-local-media-by-date-or-size)
 - [Purge Remote Media API](#purge-remote-media-api)
 
-# List all media in a room
+# Querying media
+
+These APIs allow extracting media information from the homeserver.
+
+## List all media in a room
 
 This API gets a list of known media in a room.
 However, it only shows media from unencrypted events or rooms.
@@ -36,6 +42,12 @@ The API returns a JSON body like the following:
 }
 ```
 
+## List all media uploaded by a user
+
+Listing all media that has been uploaded by a local user can be achieved through
+the use of the [List media of a user](user_admin_api.rst#list-media-of-a-user)
+Admin API.
+
 # Quarantine media
 
 Quarantining media means that it is marked as inaccessible by users. It applies

docs/admin_api/rooms.md

@@ -10,6 +10,7 @@
   * [Undoing room shutdowns](#undoing-room-shutdowns)
 - [Make Room Admin API](#make-room-admin-api)
 - [Forward Extremities Admin API](#forward-extremities-admin-api)
+- [Event Context API](#event-context-api)
 
 # List Room API
 
@@ -594,3 +595,121 @@ that were deleted.
   "deleted": 1
 }
 ```
+
+# Event Context API
+
+This API lets a client find the context of an event. This is designed primarily to investigate abuse reports.
+
+```
+GET /_synapse/admin/v1/rooms/<room_id>/context/<event_id>
+```
+
+This API mimmicks [GET /_matrix/client/r0/rooms/{roomId}/context/{eventId}](https://matrix.org/docs/spec/client_server/r0.6.1#get-matrix-client-r0-rooms-roomid-context-eventid). Please refer to the link for all details on parameters and reseponse.
+
+Example response:
+
+```json
+{
+  "end": "t29-57_2_0_2",
+  "events_after": [
+    {
+      "content": {
+        "body": "This is an example text message",
+        "msgtype": "m.text",
+        "format": "org.matrix.custom.html",
+        "formatted_body": "<b>This is an example text message</b>"
+      },
+      "type": "m.room.message",
+      "event_id": "$143273582443PhrSn:example.org",
+      "room_id": "!636q39766251:example.com",
+      "sender": "@example:example.org",
+      "origin_server_ts": 1432735824653,
+      "unsigned": {
+        "age": 1234
+      }
+    }
+  ],
+  "event": {
+    "content": {
+      "body": "filename.jpg",
+      "info": {
+        "h": 398,
+        "w": 394,
+        "mimetype": "image/jpeg",
+        "size": 31037
+      },
+      "url": "mxc://example.org/JWEIFJgwEIhweiWJE",
+      "msgtype": "m.image"
+    },
+    "type": "m.room.message",
+    "event_id": "$f3h4d129462ha:example.com",
+    "room_id": "!636q39766251:example.com",
+    "sender": "@example:example.org",
+    "origin_server_ts": 1432735824653,
+    "unsigned": {
+      "age": 1234
+    }
+  },
+  "events_before": [
+    {
+      "content": {
+        "body": "something-important.doc",
+        "filename": "something-important.doc",
+        "info": {
+          "mimetype": "application/msword",
+          "size": 46144
+        },
+        "msgtype": "m.file",
+        "url": "mxc://example.org/FHyPlCeYUSFFxlgbQYZmoEoe"
+      },
+      "type": "m.room.message",
+      "event_id": "$143273582443PhrSn:example.org",
+      "room_id": "!636q39766251:example.com",
+      "sender": "@example:example.org",
+      "origin_server_ts": 1432735824653,
+      "unsigned": {
+        "age": 1234
+      }
+    }
+  ],
+  "start": "t27-54_2_0_2",
+  "state": [
+    {
+      "content": {
+        "creator": "@example:example.org",
+        "room_version": "1",
+        "m.federate": true,
+        "predecessor": {
+          "event_id": "$something:example.org",
+          "room_id": "!oldroom:example.org"
+        }
+      },
+      "type": "m.room.create",
+      "event_id": "$143273582443PhrSn:example.org",
+      "room_id": "!636q39766251:example.com",
+      "sender": "@example:example.org",
+      "origin_server_ts": 1432735824653,
+      "unsigned": {
+        "age": 1234
+      },
+      "state_key": ""
+    },
+    {
+      "content": {
+        "membership": "join",
+        "avatar_url": "mxc://example.org/SEsfnsuifSDFSSEF",
+        "displayname": "Alice Margatroid"
+      },
+      "type": "m.room.member",
+      "event_id": "$143273582443PhrSn:example.org",
+      "room_id": "!636q39766251:example.com",
+      "sender": "@example:example.org",
+      "origin_server_ts": 1432735824653,
+      "unsigned": {
+        "age": 1234
+      },
+      "state_key": "@alice:example.org"
+    }
+  ]
+}
+```

docs/admin_api/user_admin_api.rst

@@ -29,8 +29,9 @@ It returns a JSON body like the following:
             }
         ],
         "avatar_url": "<avatar_url>",
-        "admin": false,
-        "deactivated": false,
+        "admin": 0,
+        "deactivated": 0,
+        "shadow_banned": 0,
         "password_hash": "$2b$12$p9B4GkqYdRTPGD",
         "creation_ts": 1560432506,
         "appservice_id": null,
@@ -150,6 +151,7 @@ A JSON body is returned with the following shape:
                 "admin": 0,
                 "user_type": null,
                 "deactivated": 0,
+                "shadow_banned": 0,
                 "displayname": "<User One>",
                 "avatar_url": null
             }, {
@@ -158,6 +160,7 @@ A JSON body is returned with the following shape:
                 "admin": 1,
                 "user_type": null,
                 "deactivated": 0,
+                "shadow_banned": 0,
                 "displayname": "<User Two>",
                 "avatar_url": "<avatar_url>"
             }
@@ -262,7 +265,7 @@ The following actions are performed when deactivating an user:
 - Reject all pending invites
 - Remove all account validity information related to the user
 
-The following additional actions are performed during deactivation if``erase``
+The following additional actions are performed during deactivation if ``erase``
 is set to ``true``:
 
 - Remove the user's display name
@@ -376,11 +379,12 @@ The following fields are returned in the JSON response body:
 - ``total`` - Number of rooms.
 
 
-List media of an user
-================================
+List media of a user
+====================
 Gets a list of all local media that a specific ``user_id`` has created.
-The response is ordered by creation date descending and media ID descending.
-The newest media is on top.
+By default, the response is ordered by descending creation date and ascending media ID.
+The newest media is on top. You can change the order with parameters
+``order_by`` and ``dir``.
 
 The API is::
 
@@ -437,6 +441,35 @@ The following parameters should be set in the URL:
   denoting the offset in the returned results. This should be treated as an opaque value and
   not explicitly set to anything other than the return value of ``next_token`` from a previous call.
   Defaults to ``0``.
+- ``order_by`` - The method by which to sort the returned list of media.
+  If the ordered field has duplicates, the second order is always by ascending ``media_id``,
+  which guarantees a stable ordering. Valid values are:
+
+  - ``media_id`` - Media are ordered alphabetically by ``media_id``.
+  - ``upload_name`` - Media are ordered alphabetically by name the media was uploaded with.
+  - ``created_ts`` - Media are ordered by when the content was uploaded in ms.
+    Smallest to largest. This is the default.
+  - ``last_access_ts`` - Media are ordered by when the content was last accessed in ms.
+    Smallest to largest.
+  - ``media_length`` - Media are ordered by length of the media in bytes.
+    Smallest to largest.
+  - ``media_type`` - Media are ordered alphabetically by MIME-type.
+  - ``quarantined_by`` - Media are ordered alphabetically by the user ID that
+    initiated the quarantine request for this media.
+  - ``safe_from_quarantine`` - Media are ordered by the status if this media is safe
+    from quarantining.
+
+- ``dir`` - Direction of media order. Either ``f`` for forwards or ``b`` for backwards.
+  Setting this value to ``b`` will reverse the above sort order. Defaults to ``f``.
+
+If neither ``order_by`` nor ``dir`` is set, the default order is newest media on top
+(corresponds to ``order_by`` = ``created_ts`` and ``dir`` = ``b``).
+
+Caution. The database only has indexes on the columns ``media_id``,
+``user_id`` and ``created_ts``. This means that if a different sort order is used
+(``upload_name``, ``last_access_ts``, ``media_length``, ``media_type``,
+``quarantined_by`` or ``safe_from_quarantine``), this can cause a large load on the
+database, especially for large environments.
 
 **Response**
 

docs/code_style.md

@@ -8,16 +8,16 @@ errors in code.
 
 The necessary tools are detailed below.
 
+First install them with:
+
+    pip install -e ".[lint,mypy]"
+
 -   **black**
 
     The Synapse codebase uses [black](https://pypi.org/project/black/)
     as an opinionated code formatter, ensuring all comitted code is
     properly formatted.
 
-    First install `black` with:
-
-        pip install --upgrade black
-
     Have `black` auto-format your code (it shouldn't change any
     functionality) with:
 
@@ -28,10 +28,6 @@ The necessary tools are detailed below.
     `flake8` is a code checking tool. We require code to pass `flake8`
     before being merged into the codebase.
 
-    Install `flake8` with:
-
-        pip install --upgrade flake8 flake8-comprehensions
-
     Check all application and test code with:
 
         flake8 synapse tests
@@ -41,10 +37,6 @@ The necessary tools are detailed below.
     `isort` ensures imports are nicely formatted, and can suggest and
     auto-fix issues such as double-importing.
 
-    Install `isort` with:
-
-        pip install --upgrade isort
-
     Auto-fix imports with:
 
         isort -rc synapse tests

docs/openid.md

@@ -226,7 +226,7 @@ Synapse config:
 oidc_providers:
   - idp_id: github
     idp_name: Github
-    idp_brand: "org.matrix.github"  # optional: styling hint for clients
+    idp_brand: "github"  # optional: styling hint for clients
     discover: false
     issuer: "https://github.com/"
     client_id: "your-client-id" # TO BE FILLED
@@ -252,7 +252,7 @@ oidc_providers:
    oidc_providers:
      - idp_id: google
        idp_name: Google
-       idp_brand: "org.matrix.google"  # optional: styling hint for clients
+       idp_brand: "google"  # optional: styling hint for clients
        issuer: "https://accounts.google.com/"
        client_id: "your-client-id" # TO BE FILLED
        client_secret: "your-client-secret" # TO BE FILLED
@@ -299,7 +299,7 @@ Synapse config:
 oidc_providers:
   - idp_id: gitlab
     idp_name: Gitlab
-    idp_brand: "org.matrix.gitlab"  # optional: styling hint for clients
+    idp_brand: "gitlab"  # optional: styling hint for clients
     issuer: "https://gitlab.com/"
     client_id: "your-client-id" # TO BE FILLED
     client_secret: "your-client-secret" # TO BE FILLED
@@ -334,7 +334,7 @@ Synapse config:
 ```yaml
   - idp_id: facebook
     idp_name: Facebook
-    idp_brand: "org.matrix.facebook"  # optional: styling hint for clients
+    idp_brand: "facebook"  # optional: styling hint for clients
     discover: false
     issuer: "https://facebook.com"
     client_id: "your-client-id" # TO BE FILLED
@@ -365,7 +365,7 @@ login mechanism needs an attribute to uniquely identify users, and that endpoint
 does not return a `sub` property, an alternative `subject_claim` has to be set.
 
 1. Create a new application.
-2. Add this Callback URL: `[synapse public baseurl]/_synapse/oidc/callback`
+2. Add this Callback URL: `[synapse public baseurl]/_synapse/client/oidc/callback`
 
 Synapse config:
 
@@ -386,5 +386,63 @@ oidc_providers:
       config:
         subject_claim: "id"
         localpart_template: "{{ user.login }}"
-        display_name_template: "{{ user.full_name }}" 
+        display_name_template: "{{ user.full_name }}"
+```
+
+### XWiki
+
+Install [OpenID Connect Provider](https://extensions.xwiki.org/xwiki/bin/view/Extension/OpenID%20Connect/OpenID%20Connect%20Provider/) extension in your [XWiki](https://www.xwiki.org) instance.
+
+Synapse config:
+
+```yaml
+oidc_providers:
+  - idp_id: xwiki
+    idp_name: "XWiki"
+    issuer: "https://myxwikihost/xwiki/oidc/"
+    client_id: "your-client-id" # TO BE FILLED
+    client_auth_method: none
+    scopes: ["openid", "profile"]
+    user_profile_method: "userinfo_endpoint"
+    user_mapping_provider:
+      config:
+        localpart_template: "{{ user.preferred_username }}"
+        display_name_template: "{{ user.name }}"
+```
+
+## Apple
+
+Configuring "Sign in with Apple" (SiWA) requires an Apple Developer account.
+
+You will need to create a new "Services ID" for SiWA, and create and download a
+private key with "SiWA" enabled.
+
+As well as the private key file, you will need:
+ * Client ID: the "identifier" you gave the "Services ID"
+ * Team ID: a 10-character ID associated with your developer account.
+ * Key ID: the 10-character identifier for the key.
+
+https://help.apple.com/developer-account/?lang=en#/dev77c875b7e has more
+documentation on setting up SiWA.
+
+The synapse config will look like this:
+
+```yaml
+  - idp_id: apple
+    idp_name: Apple
+    issuer: "https://appleid.apple.com"
+    client_id: "your-client-id" # Set to the "identifier" for your "ServicesID"
+    client_auth_method: "client_secret_post"
+    client_secret_jwt_key:
+      key_file: "/path/to/AuthKey_KEYIDCODE.p8"  # point to your key file
+      jwt_header:
+        alg: ES256
+        kid: "KEYIDCODE"   # Set to the 10-char Key ID
+      jwt_payload:
+        iss: TEAMIDCODE    # Set to the 10-char Team ID
+    scopes: ["name", "email", "openid"]
+    authorization_endpoint: https://appleid.apple.com/auth/authorize?response_mode=form_post
+    user_mapping_provider:
+      config:
+        email_template: "{{ user.email }}"
 ```

docs/reverse_proxy.md

@@ -3,30 +3,31 @@
 It is recommended to put a reverse proxy such as
 [nginx](https://nginx.org/en/docs/http/ngx_http_proxy_module.html),
 [Apache](https://httpd.apache.org/docs/current/mod/mod_proxy_http.html),
-[Caddy](https://caddyserver.com/docs/quick-starts/reverse-proxy) or
-[HAProxy](https://www.haproxy.org/) in front of Synapse. One advantage
+[Caddy](https://caddyserver.com/docs/quick-starts/reverse-proxy),
+[HAProxy](https://www.haproxy.org/) or
+[relayd](https://man.openbsd.org/relayd.8) in front of Synapse. One advantage
 of doing so is that it means that you can expose the default https port
 (443) to Matrix clients without needing to run Synapse with root
 privileges.
 
+You should configure your reverse proxy to forward requests to `/_matrix` or
+`/_synapse/client` to Synapse, and have it set the `X-Forwarded-For` and
+`X-Forwarded-Proto` request headers.
+
+You should remember that Matrix clients and other Matrix servers do not
+necessarily need to connect to your server via the same server name or
+port. Indeed, clients will use port 443 by default, whereas servers default to
+port 8448. Where these are different, we refer to the 'client port' and the
+'federation port'. See [the Matrix
+specification](https://matrix.org/docs/spec/server_server/latest#resolving-server-names)
+for more details of the algorithm used for federation connections, and
+[delegate.md](<delegate.md>) for instructions on setting up delegation.
+
 **NOTE**: Your reverse proxy must not `canonicalise` or `normalise`
 the requested URI in any way (for example, by decoding `%xx` escapes).
 Beware that Apache *will* canonicalise URIs unless you specify
 `nocanon`.
 
-When setting up a reverse proxy, remember that Matrix clients and other
-Matrix servers do not necessarily need to connect to your server via the
-same server name or port. Indeed, clients will use port 443 by default,
-whereas servers default to port 8448. Where these are different, we
-refer to the 'client port' and the 'federation port'. See [the Matrix
-specification](https://matrix.org/docs/spec/server_server/latest#resolving-server-names)
-for more details of the algorithm used for federation connections, and
-[delegate.md](<delegate.md>) for instructions on setting up delegation.
-
-Endpoints that are part of the standardised Matrix specification are
-located under `/_matrix`, whereas endpoints specific to Synapse are
-located under `/_synapse/client`.
-
 Let's assume that we expect clients to connect to our server at
 `https://matrix.example.com`, and other servers to connect at
 `https://example.com:8448`.  The following sections detail the configuration of
@@ -40,18 +41,21 @@ the reverse proxy and the homeserver.
 
 ```
 server {
-    listen 443 ssl;
-    listen [::]:443 ssl;
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
 
     # For the federation port
-    listen 8448 ssl default_server;
-    listen [::]:8448 ssl default_server;
+    listen 8448 ssl http2 default_server;
+    listen [::]:8448 ssl http2 default_server;
 
     server_name matrix.example.com;
 
     location ~* ^(\/_matrix|\/_synapse\/client) {
         proxy_pass http://localhost:8008;
         proxy_set_header X-Forwarded-For $remote_addr;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header Host $host;
+
         # Nginx by default only allows file uploads up to 1M in size
         # Increase client_max_body_size to match max_upload_size defined in homeserver.yaml
         client_max_body_size 50M;
@@ -102,6 +106,7 @@ example.com:8448 {
     SSLEngine on
     ServerName matrix.example.com;
 
+    RequestHeader set "X-Forwarded-Proto" expr=%{REQUEST_SCHEME}
     AllowEncodedSlashes NoDecode
     ProxyPass /_matrix http://127.0.0.1:8008/_matrix nocanon
     ProxyPassReverse /_matrix http://127.0.0.1:8008/_matrix
@@ -113,6 +118,7 @@ example.com:8448 {
     SSLEngine on
     ServerName example.com;
 
+    RequestHeader set "X-Forwarded-Proto" expr=%{REQUEST_SCHEME}
     AllowEncodedSlashes NoDecode
     ProxyPass /_matrix http://127.0.0.1:8008/_matrix nocanon
     ProxyPassReverse /_matrix http://127.0.0.1:8008/_matrix
@@ -134,6 +140,9 @@ example.com:8448 {
 ```
 frontend https
   bind :::443 v4v6 ssl crt /etc/ssl/haproxy/ strict-sni alpn h2,http/1.1
+  http-request set-header X-Forwarded-Proto https if { ssl_fc }
+  http-request set-header X-Forwarded-Proto http if !{ ssl_fc }
+  http-request set-header X-Forwarded-For %[src]
 
   # Matrix client traffic
   acl matrix-host hdr(host) -i matrix.example.com
@@ -144,12 +153,62 @@ frontend https
 
 frontend matrix-federation
   bind :::8448 v4v6 ssl crt /etc/ssl/haproxy/synapse.pem alpn h2,http/1.1
+  http-request set-header X-Forwarded-Proto https if { ssl_fc }
+  http-request set-header X-Forwarded-Proto http if !{ ssl_fc }
+  http-request set-header X-Forwarded-For %[src]
+
   default_backend matrix
 
 backend matrix
   server matrix 127.0.0.1:8008
 ```
 
+### Relayd
+
+```
+table <webserver>    { 127.0.0.1 }
+table <matrixserver> { 127.0.0.1 }
+
+http protocol "https" {
+    tls { no tlsv1.0, ciphers "HIGH" }
+    tls keypair "example.com"
+    match header set "X-Forwarded-For"   value "$REMOTE_ADDR"
+    match header set "X-Forwarded-Proto" value "https"
+
+    # set CORS header for .well-known/matrix/server, .well-known/matrix/client
+    # httpd does not support setting headers, so do it here
+    match request path "/.well-known/matrix/*" tag "matrix-cors"
+    match response tagged "matrix-cors" header set "Access-Control-Allow-Origin" value "*"
+
+    pass quick path "/_matrix/*"         forward to <matrixserver>
+    pass quick path "/_synapse/client/*" forward to <matrixserver>
+
+    # pass on non-matrix traffic to webserver
+    pass                                 forward to <webserver>
+}
+
+relay "https_traffic" {
+    listen on egress port 443 tls
+    protocol "https"
+    forward to <matrixserver> port 8008 check tcp
+    forward to <webserver>    port 8080 check tcp
+}
+
+http protocol "matrix" {
+    tls { no tlsv1.0, ciphers "HIGH" }
+    tls keypair "example.com"
+    block
+    pass quick path "/_matrix/*"         forward to <matrixserver>
+    pass quick path "/_synapse/client/*" forward to <matrixserver>
+}
+
+relay "matrix_federation" {
+    listen on egress port 8448 tls
+    protocol "matrix"
+    forward to <matrixserver> port 8008 check tcp
+}
+```
+
 ## Homeserver Configuration
 
 You will also want to set `bind_addresses: ['127.0.0.1']` and

docs/sample_config.yaml

@@ -74,10 +74,6 @@ pid_file: DATADIR/homeserver.pid
 # Otherwise, it should be the URL to reach Synapse's client HTTP listener (see
 # 'listeners' below).
 #
-# If this is left unset, it defaults to 'https://<server_name>/'. (Note that
-# that will not work unless you configure Synapse or a reverse-proxy to listen
-# on port 443.)
-#
 #public_baseurl: https://example.com/
 
 # Set the soft limit on the number of file descriptors synapse can use
@@ -93,8 +89,7 @@ pid_file: DATADIR/homeserver.pid
 # Whether to require authentication to retrieve profile data (avatars,
 # display names) of other users through the client API. Defaults to
 # 'false'. Note that profile data is also available via the federation
-# API, so this setting is of limited value if federation is enabled on
-# the server.
+# API, unless allow_profile_lookup_over_federation is set to false.
 #
 #require_auth_for_profile_requests: true
 
@@ -105,6 +100,14 @@ pid_file: DATADIR/homeserver.pid
 #
 #limit_profile_requests_to_users_who_share_rooms: true
 
+# Uncomment to prevent a user's profile data from being retrieved and
+# displayed in a room until they have joined it. By default, a user's
+# profile data is included in an invite event, regardless of the values
+# of the above two settings, and whether or not the users share a server.
+# Defaults to 'true'.
+#
+#include_profile_data_on_invite: false
+
 # If set to 'true', removes the need for authentication to access the server's
 # public rooms directory through the client API, meaning that anyone can
 # query the room directory. Defaults to 'false'.
@@ -169,6 +172,7 @@ pid_file: DATADIR/homeserver.pid
 #  - '100.64.0.0/10'
 #  - '192.0.0.0/24'
 #  - '169.254.0.0/16'
+#  - '192.88.99.0/24'
 #  - '198.18.0.0/15'
 #  - '192.0.2.0/24'
 #  - '198.51.100.0/24'
@@ -177,6 +181,9 @@ pid_file: DATADIR/homeserver.pid
 #  - '::1/128'
 #  - 'fe80::/10'
 #  - 'fc00::/7'
+#  - '2001:db8::/32'
+#  - 'ff00::/8'
+#  - 'fec0::/10'
 
 # List of IP address CIDR ranges that should be allowed for federation,
 # identity servers, push servers, and for checking key validity for
@@ -699,6 +706,12 @@ acme:
 #  - matrix.org
 #  - example.com
 
+# Uncomment to disable profile lookup over federation. By default, the
+# Federation API allows other homeservers to obtain profile data of any user
+# on this homeserver. Defaults to 'true'.
+#
+#allow_profile_lookup_over_federation: false
+
 
 ## Caching ##
 
@@ -994,6 +1007,7 @@ media_store_path: "DATADIR/media_store"
 #  - '100.64.0.0/10'
 #  - '192.0.0.0/24'
 #  - '169.254.0.0/16'
+#  - '192.88.99.0/24'
 #  - '198.18.0.0/15'
 #  - '192.0.2.0/24'
 #  - '198.51.100.0/24'
@@ -1002,6 +1016,9 @@ media_store_path: "DATADIR/media_store"
 #  - '::1/128'
 #  - 'fe80::/10'
 #  - 'fc00::/7'
+#  - '2001:db8::/32'
+#  - 'ff00::/8'
+#  - 'fec0::/10'
 
 # List of IP address CIDR ranges that the URL preview spider is allowed
 # to access even if they are specified in url_preview_ip_range_blacklist.
@@ -1169,9 +1186,8 @@ account_validity:
   # send an email to the account's email address with a renewal link. By
   # default, no such emails are sent.
   #
-  # If you enable this setting, you will also need to fill out the 'email'
-  # configuration section. You should also check that 'public_baseurl' is set
-  # correctly.
+  # If you enable this setting, you will also need to fill out the 'email' and
+  # 'public_baseurl' configuration sections.
   #
   #renew_at: 1w
 
@@ -1262,7 +1278,8 @@ account_validity:
 # The identity server which we suggest that clients should use when users log
 # in on this server.
 #
-# (By default, no suggestion is made, so it is left up to the client.)
+# (By default, no suggestion is made, so it is left up to the client.
+# This setting is ignored unless public_baseurl is also set.)
 #
 #default_identity_server: https://matrix.org
 
@@ -1287,6 +1304,8 @@ account_validity:
 # by the Matrix Identity Service API specification:
 # https://matrix.org/docs/spec/identity_service/latest
 #
+# If a delegate is specified, the config option public_baseurl must also be filled out.
+#
 account_threepid_delegates:
     #email: https://example.com     # Delegate email sending to example.com
     #msisdn: http://localhost:8090  # Delegate SMS sending to this local process
@@ -1320,6 +1339,8 @@ account_threepid_delegates:
 # By default, any room aliases included in this list will be created
 # as a publicly joinable room when the first user registers for the
 # homeserver. This behaviour can be customised with the settings below.
+# If the room already exists, make certain it is a publicly joinable
+# room. The join rule of the room must be set to 'public'.
 #
 #auto_join_rooms:
 #  - "#example:example.com"
@@ -1758,7 +1779,26 @@ saml2_config:
 #
 #   client_id: Required. oauth2 client id to use.
 #
-#   client_secret: Required. oauth2 client secret to use.
+#   client_secret: oauth2 client secret to use. May be omitted if
+#        client_secret_jwt_key is given, or if client_auth_method is 'none'.
+#
+#   client_secret_jwt_key: Alternative to client_secret: details of a key used
+#      to create a JSON Web Token to be used as an OAuth2 client secret. If
+#      given, must be a dictionary with the following properties:
+#
+#          key: a pem-encoded signing key. Must be a suitable key for the
+#              algorithm specified. Required unless 'key_file' is given.
+#
+#          key_file: the path to file containing a pem-encoded signing key file.
+#              Required unless 'key' is given.
+#
+#          jwt_header: a dictionary giving properties to include in the JWT
+#              header. Must include the key 'alg', giving the algorithm used to
+#              sign the JWT, such as "ES256", using the JWA identifiers in
+#              RFC7518.
+#
+#          jwt_payload: an optional dictionary giving properties to include in
+#              the JWT payload. Normally this should include an 'iss' key.
 #
 #   client_auth_method: auth method to use when exchanging the token. Valid
 #       values are 'client_secret_basic' (default), 'client_secret_post' and
@@ -1862,9 +1902,9 @@ oidc_providers:
   #  user_mapping_provider:
   #    config:
   #      subject_claim: "id"
-  #      localpart_template: "{ user.login }"
-  #      display_name_template: "{ user.name }"
-  #      email_template: "{ user.email }"
+  #      localpart_template: "{{ user.login }}"
+  #      display_name_template: "{{ user.name }}"
+  #      email_template: "{{ user.email }}"
 
   # For use with Keycloak
   #
@@ -1879,7 +1919,7 @@ oidc_providers:
   #
   #- idp_id: github
   #  idp_name: Github
-  #  idp_brand: org.matrix.github
+  #  idp_brand: github
   #  discover: false
   #  issuer: "https://github.com/"
   #  client_id: "your-client-id" # TO BE FILLED
@@ -1891,8 +1931,8 @@ oidc_providers:
   #  user_mapping_provider:
   #    config:
   #      subject_claim: "id"
-  #      localpart_template: "{ user.login }"
-  #      display_name_template: "{ user.name }"
+  #      localpart_template: "{{ user.login }}"
+  #      display_name_template: "{{ user.name }}"
 
 
 # Enable Central Authentication Service (CAS) for registration and login.
@@ -1938,9 +1978,9 @@ sso:
     # phishing attacks from evil.site. To avoid this, include a slash after the
     # hostname: "https://my.client/".
     #
-    # The login fallback page (used by clients that don't natively support the
-    # required login flows) is automatically whitelisted in addition to any URLs
-    # in this list.
+    # If public_baseurl is set, then the login fallback page (used by clients
+    # that don't natively support the required login flows) is whitelisted in
+    # addition to any URLs in this list.
     #
     # By default, this list is empty.
     #
@@ -1961,8 +2001,7 @@ sso:
     #
     #   When rendering, this template is given the following variables:
     #     * redirect_url: the URL that the user will be redirected to after
-    #       login. Needs manual escaping (see
-    #       https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
+    #       login.
     #
     #     * server_name: the homeserver's name.
     #
@@ -2040,15 +2079,12 @@ sso:
     #
     #   When rendering, this template is given the following variables:
     #
-    #     * redirect_url: the URL the user is about to be redirected to. Needs
-    #                     manual escaping (see
-    #                     https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
+    #     * redirect_url: the URL the user is about to be redirected to.
     #
     #     * display_url: the same as `redirect_url`, but with the query
     #                    parameters stripped. The intention is to have a
     #                    human-readable URL to show to users, not to use it as
-    #                    the final address to redirect to. Needs manual escaping
-    #                    (see https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
+    #                    the final address to redirect to.
     #
     #     * server_name: the homeserver's name.
     #
@@ -2068,9 +2104,7 @@ sso:
     #   process: 'sso_auth_confirm.html'.
     #
     #   When rendering, this template is given the following variables:
-    #     * redirect_url: the URL the user is about to be redirected to. Needs
-    #                     manual escaping (see
-    #                     https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
+    #     * redirect_url: the URL the user is about to be redirected to.
     #
     #     * description: the operation which the user is being asked to confirm
     #
@@ -2226,11 +2260,11 @@ password_config:
       #require_uppercase: true
 
 ui_auth:
-    # The number of milliseconds to allow a user-interactive authentication
-    # session to be active.
+    # The amount of time to allow a user-interactive authentication session
+    # to be active.
     #
     # This defaults to 0, meaning the user is queried for their credentials
-    # before every action, but this can be overridden to alow a single
+    # before every action, but this can be overridden to allow a single
     # validation to be re-used.  This weakens the protections afforded by
     # the user-interactive authentication process, by allowing for multiple
     # (and potentially different) operations to use the same validation session.
@@ -2238,7 +2272,7 @@ ui_auth:
     # Uncomment below to allow for credential validation to last for 15
     # seconds.
     #
-    #session_timeout: 15000
+    #session_timeout: "15s"
 
 
 # Configuration for sending emails from Synapse.
@@ -2528,19 +2562,35 @@ spam_checker:
 
 # User Directory configuration
 #
-# 'enabled' defines whether users can search the user directory. If
-# false then empty responses are returned to all queries. Defaults to
-# true.
-#
-# 'search_all_users' defines whether to search all users visible to your HS
-# when searching the user directory, rather than limiting to users visible
-# in public rooms.  Defaults to false.  If you set it True, you'll have to
-# rebuild the user_directory search indexes, see
-# https://github.com/matrix-org/synapse/blob/master/docs/user_directory.md
-#
-#user_directory:
-#  enabled: true
-#  search_all_users: false
+user_directory:
+    # Defines whether users can search the user directory. If false then
+    # empty responses are returned to all queries. Defaults to true.
+    #
+    # Uncomment to disable the user directory.
+    #
+    #enabled: false
+
+    # Defines whether to search all users visible to your HS when searching
+    # the user directory, rather than limiting to users visible in public
+    # rooms. Defaults to false.
+    #
+    # If you set it true, you'll have to rebuild the user_directory search
+    # indexes, see:
+    # https://github.com/matrix-org/synapse/blob/master/docs/user_directory.md
+    #
+    # Uncomment to return search results containing all known users, even if that
+    # user does not share a room with the requester.
+    #
+    #search_all_users: true
+
+    # Defines whether to prefer local users in search query results.
+    # If True, local users are more likely to appear above remote users
+    # when searching the user directory. Defaults to false.
+    #
+    # Uncomment to prefer local over remote users in user directory search
+    # results.
+    #
+    #prefer_local_users: true
 
 
 # User Consent configuration
@@ -2595,19 +2645,20 @@ spam_checker:
 
 
 
-# Local statistics collection. Used in populating the room directory.
+# Settings for local room and user statistics collection. See
+# docs/room_and_user_statistics.md.
 #
-# 'bucket_size' controls how large each statistics timeslice is. It can
-# be defined in a human readable short form -- e.g. "1d", "1y".
-#
-# 'retention' controls how long historical statistics will be kept for.
-# It can be defined in a human readable short form -- e.g. "1d", "1y".
-#
-#
-#stats:
-#   enabled: true
-#   bucket_size: 1d
-#   retention: 1y
+stats:
+  # Uncomment the following to disable room and user statistics. Note that doing
+  # so may cause certain features (such as the room directory) not to work
+  # correctly.
+  #
+  #enabled: false
+
+  # The size of each timeslice in the room_stats_historical and
+  # user_stats_historical tables, as a time period. Defaults to "1d".
+  #
+  #bucket_size: 1h
 
 
 # Server Notices room configuration

docs/spam_checker.md

@@ -14,6 +14,7 @@ The Python class is instantiated with two objects:
 * An instance of `synapse.module_api.ModuleApi`.
 
 It then implements methods which return a boolean to alter behavior in Synapse.
+All the methods must be defined.
 
 There's a generic method for checking every event (`check_event_for_spam`), as
 well as some specific methods:
@@ -24,13 +25,18 @@ well as some specific methods:
 * `user_may_publish_room`
 * `check_username_for_spam`
 * `check_registration_for_spam`
+* `check_media_file_for_spam`
 
-The details of the each of these methods (as well as their inputs and outputs)
+The details of each of these methods (as well as their inputs and outputs)
 are documented in the `synapse.events.spamcheck.SpamChecker` class.
 
 The `ModuleApi` class provides a way for the custom spam checker class to
 call back into the homeserver internals.
 
+Additionally, a `parse_config` method is mandatory and receives the plugin config
+dictionary. After parsing, It must return an object which will be
+passed to `__init__` later.
+
 ### Example
 
 ```python
@@ -41,6 +47,10 @@ class ExampleSpamChecker:
         self.config = config
         self.api = api
 
+    @staticmethod
+    def parse_config(config):
+        return config
+        
     async def check_event_for_spam(self, foo):
         return False  # allow all events
 
@@ -59,8 +69,17 @@ class ExampleSpamChecker:
     async def check_username_for_spam(self, user_profile):
         return False  # allow all usernames
 
-    async def check_registration_for_spam(self, email_threepid, username, request_info):
+    async def check_registration_for_spam(
+        self,
+        email_threepid,
+        username,
+        request_info,
+        auth_provider_id,
+    ):
         return RegistrationBehaviour.ALLOW  # allow all registrations
+
+    async def check_media_file_for_spam(self, file_wrapper, file_info):
+        return False  # allow all media
 ```
 
 ## Configuration

docs/systemd-with-workers/system/matrix-synapse-worker@.service

@@ -4,6 +4,7 @@ AssertPathExists=/etc/matrix-synapse/workers/%i.yaml
 
 # This service should be restarted when the synapse target is restarted.
 PartOf=matrix-synapse.target
+ReloadPropagatedFrom=matrix-synapse.target
 
 # if this is started at the same time as the main, let the main process start
 # first, to initialise the database schema.

docs/systemd-with-workers/system/matrix-synapse.service

@@ -3,6 +3,7 @@ Description=Synapse master
 
 # This service should be restarted when the synapse target is restarted.
 PartOf=matrix-synapse.target
+ReloadPropagatedFrom=matrix-synapse.target
 
 [Service]
 Type=notify

docs/tcp_replication.md

@@ -220,10 +220,6 @@ Asks the server for the current position of all streams.
 
    Acknowledge receipt of some federation data
 
-#### REMOVE_PUSHER (C)
-
-   Inform the server a pusher should be removed
-
 ### REMOTE_SERVER_UP (S, C)
 
    Inform other processes that a remote server may have come back online.

docs/turn-howto.md

@@ -187,7 +187,7 @@ After updating the homeserver configuration, you must restart synapse:
     ```
   * If you use systemd:
     ```
-    systemctl restart synapse.service
+    systemctl restart matrix-synapse.service
     ```
 ... and then reload any clients (or wait an hour for them to refresh their
 settings).

docs/workers.md

@@ -276,7 +276,8 @@ using):
 
 Ensure that all SSO logins go to a single process.
 For multiple workers not handling the SSO endpoints properly, see
-[#7530](https://github.com/matrix-org/synapse/issues/7530).
+[#7530](https://github.com/matrix-org/synapse/issues/7530) and 
+[#9427](https://github.com/matrix-org/synapse/issues/9427).
 
 Note that a HTTP listener with `client` and `federation` resources must be
 configured in the `worker_listeners` option in the worker config.
@@ -373,7 +374,15 @@ Handles sending push notifications to sygnal and email. Doesn't handle any
 REST endpoints itself, but you should set `start_pushers: False` in the
 shared configuration file to stop the main synapse sending push notifications.
 
-Note this worker cannot be load-balanced: only one instance should be active.
+To run multiple instances at once the `pusher_instances` option should list all
+pusher instances by their worker name, e.g.:
+
+```yaml
+pusher_instances:
+    - pusher_worker1
+    - pusher_worker2
+```
+
 
 ### `synapse.app.appservice`
 

mypy.ini

@@ -23,6 +23,7 @@ files =
   synapse/events/validator.py,
   synapse/events/spamcheck.py,
   synapse/federation,
+  synapse/groups,
   synapse/handlers,
   synapse/http/client.py,
   synapse/http/federation/matrix_federation_agent.py,
@@ -68,6 +69,7 @@ files =
   synapse/util/async_helpers.py,
   synapse/util/caches,
   synapse/util/metrics.py,
+  synapse/util/macaroons.py,
   synapse/util/stringutils.py,
   tests/replication,
   tests/test_utils,
@@ -115,9 +117,6 @@ ignore_missing_imports = True
 [mypy-saml2.*]
 ignore_missing_imports = True
 
-[mypy-unpaddedbase64]
-ignore_missing_imports = True
-
 [mypy-canonicaljson]
 ignore_missing_imports = True
 

scripts-dev/config-lint.sh

@@ -2,9 +2,14 @@
 # Find linting errors in Synapse's default config file.
 # Exits with 0 if there are no problems, or another code otherwise.
 
+# cd to the root of the repository
+cd `dirname $0`/..
+
+# Restore backup of sample config upon script exit
+trap "mv docs/sample_config.yaml.bak docs/sample_config.yaml" EXIT
+
 # Fix non-lowercase true/false values
 sed -i.bak -E "s/: +True/: true/g; s/: +False/: false/g;" docs/sample_config.yaml
-rm docs/sample_config.yaml.bak
 
 # Check if anything changed
-git diff --exit-code docs/sample_config.yaml
+diff docs/sample_config.yaml docs/sample_config.yaml.bak

scripts-dev/make_full_schema.sh

@@ -162,12 +162,23 @@ else
 fi
 
 # Delete schema_version, applied_schema_deltas and applied_module_schemas tables
+# Also delete any shadow tables from fts4
 # This needs to be done after synapse_port_db is run
 echo "Dropping unwanted db tables..."
 SQL="
 DROP TABLE schema_version;
 DROP TABLE applied_schema_deltas;
 DROP TABLE applied_module_schemas;
+DROP TABLE event_search_content;
+DROP TABLE event_search_segments;
+DROP TABLE event_search_segdir;
+DROP TABLE event_search_docsize;
+DROP TABLE event_search_stat;
+DROP TABLE user_directory_search_content;
+DROP TABLE user_directory_search_segments;
+DROP TABLE user_directory_search_segdir;
+DROP TABLE user_directory_search_docsize;
+DROP TABLE user_directory_search_stat;
 "
 sqlite3 "$SQLITE_DB" <<< "$SQL"
 psql $POSTGRES_DB_NAME -U "$POSTGRES_USERNAME" -w <<< "$SQL"

scripts-dev/mypy_synapse_plugin.py

@@ -87,7 +87,9 @@ def cached_function_method_signature(ctx: MethodSigContext) -> CallableType:
     arg_kinds.append(ARG_NAMED_OPT)  # Arg is an optional kwarg.
 
     signature = signature.copy_modified(
-        arg_types=arg_types, arg_names=arg_names, arg_kinds=arg_kinds,
+        arg_types=arg_types,
+        arg_names=arg_names,
+        arg_kinds=arg_kinds,
     )
 
     return signature

scripts/synapse_port_db

@@ -22,7 +22,7 @@ import logging
 import sys
 import time
 import traceback
-from typing import Dict, Optional, Set
+from typing import Dict, Iterable, Optional, Set
 
 import yaml
 
@@ -47,6 +47,7 @@ from synapse.storage.databases.main.events_bg_updates import (
 from synapse.storage.databases.main.media_repository import (
     MediaRepositoryBackgroundUpdateStore,
 )
+from synapse.storage.databases.main.pusher import PusherWorkerStore
 from synapse.storage.databases.main.registration import (
     RegistrationBackgroundUpdateStore,
     find_max_generated_user_id_localpart,
@@ -177,6 +178,7 @@ class Store(
     UserDirectoryBackgroundUpdateStore,
     EndToEndKeyBackgroundStore,
     StatsStore,
+    PusherWorkerStore,
 ):
     def execute(self, f, *args, **kwargs):
         return self.db_pool.runInteraction(f.__name__, f, *args, **kwargs)
@@ -629,7 +631,13 @@ class Porter(object):
             await self._setup_state_group_id_seq()
             await self._setup_user_id_seq()
             await self._setup_events_stream_seqs()
-            await self._setup_device_inbox_seq()
+            await self._setup_sequence(
+                "device_inbox_sequence", ("device_inbox", "device_federation_outbox")
+            )
+            await self._setup_sequence(
+                "account_data_sequence", ("room_account_data", "room_tags_revisions", "account_data"))
+            await self._setup_sequence("receipts_sequence", ("receipts_linearized", ))
+            await self._setup_auth_chain_sequence()
 
             # Step 3. Get tables.
             self.progress.set_state("Fetching tables")
@@ -854,7 +862,7 @@ class Porter(object):
 
         return done, remaining + done
 
-    async def _setup_state_group_id_seq(self):
+    async def _setup_state_group_id_seq(self) -> None:
         curr_id = await self.sqlite_store.db_pool.simple_select_one_onecol(
             table="state_groups", keyvalues={}, retcol="MAX(id)", allow_none=True
         )
@@ -868,7 +876,7 @@ class Porter(object):
 
         await self.postgres_store.db_pool.runInteraction("setup_state_group_id_seq", r)
 
-    async def _setup_user_id_seq(self):
+    async def _setup_user_id_seq(self) -> None:
         curr_id = await self.sqlite_store.db_pool.runInteraction(
             "setup_user_id_seq", find_max_generated_user_id_localpart
         )
@@ -877,9 +885,9 @@ class Porter(object):
             next_id = curr_id + 1
             txn.execute("ALTER SEQUENCE user_id_seq RESTART WITH %s", (next_id,))
 
-        return self.postgres_store.db_pool.runInteraction("setup_user_id_seq", r)
+        await self.postgres_store.db_pool.runInteraction("setup_user_id_seq", r)
 
-    async def _setup_events_stream_seqs(self):
+    async def _setup_events_stream_seqs(self) -> None:
         """Set the event stream sequences to the correct values.
         """
 
@@ -908,35 +916,46 @@ class Porter(object):
                 (curr_backward_id + 1,),
             )
 
-        return await self.postgres_store.db_pool.runInteraction(
+        await self.postgres_store.db_pool.runInteraction(
             "_setup_events_stream_seqs", _setup_events_stream_seqs_set_pos,
         )
 
-    async def _setup_device_inbox_seq(self):
-        """Set the device inbox sequence to the correct value.
+    async def _setup_sequence(self, sequence_name: str, stream_id_tables: Iterable[str]) -> None:
+        """Set a sequence to the correct value.
         """
-        curr_local_id = await self.sqlite_store.db_pool.simple_select_one_onecol(
-            table="device_inbox",
-            keyvalues={},
-            retcol="COALESCE(MAX(stream_id), 1)",
-            allow_none=True,
-        )
+        current_stream_ids = []
+        for stream_id_table in stream_id_tables:
+            max_stream_id = await self.sqlite_store.db_pool.simple_select_one_onecol(
+                table=stream_id_table,
+                keyvalues={},
+                retcol="COALESCE(MAX(stream_id), 1)",
+                allow_none=True,
+            )
+            current_stream_ids.append(max_stream_id)
 
-        curr_federation_id = await self.sqlite_store.db_pool.simple_select_one_onecol(
-            table="device_federation_outbox",
-            keyvalues={},
-            retcol="COALESCE(MAX(stream_id), 1)",
-            allow_none=True,
-        )
+        next_id = max(current_stream_ids) + 1
 
-        next_id = max(curr_local_id, curr_federation_id) + 1
+        def r(txn):
+            sql = "ALTER SEQUENCE %s RESTART WITH" % (sequence_name, )
+            txn.execute(sql + " %s", (next_id, ))
+
+        await self.postgres_store.db_pool.runInteraction("_setup_%s" % (sequence_name,), r)
+
+    async def _setup_auth_chain_sequence(self) -> None:
+        curr_chain_id = await self.sqlite_store.db_pool.simple_select_one_onecol(
+            table="event_auth_chains", keyvalues={}, retcol="MAX(chain_id)", allow_none=True
+        )
 
         def r(txn):
             txn.execute(
-                "ALTER SEQUENCE device_inbox_sequence RESTART WITH %s", (next_id,)
+                "ALTER SEQUENCE event_auth_chain_id RESTART WITH %s",
+                (curr_chain_id,),
             )
 
-        return self.postgres_store.db_pool.runInteraction("_setup_device_inbox_seq", r)
+        await self.postgres_store.db_pool.runInteraction(
+            "_setup_event_auth_chain_id", r,
+        )
+
 
 
 ##############################################

setup.cfg

@@ -3,6 +3,7 @@ test_suite = tests
 
 [check-manifest]
 ignore =
+    .git-blame-ignore-revs
     contrib
     contrib/*
     docs/*

setup.py

@@ -97,12 +97,12 @@ CONDITIONAL_REQUIREMENTS["all"] = list(ALL_OPTIONAL_REQUIREMENTS)
 # We pin black so that our tests don't start failing on new releases.
 CONDITIONAL_REQUIREMENTS["lint"] = [
     "isort==5.7.0",
-    "black==19.10b0",
+    "black==20.8b1",
     "flake8-comprehensions",
     "flake8",
 ]
 
-CONDITIONAL_REQUIREMENTS["mypy"] = ["mypy==0.790", "mypy-zope==0.2.8"]
+CONDITIONAL_REQUIREMENTS["mypy"] = ["mypy==0.812", "mypy-zope==0.2.11"]
 
 # Dependencies which are exclusively required by unit test code. This is
 # NOT a list of all modules that are necessary to run the unit tests.

stubs/sortedcontainers/sorteddict.pyi

@@ -89,12 +89,16 @@ class SortedDict(Dict[_KT, _VT]):
     def __reduce__(
         self,
     ) -> Tuple[
-        Type[SortedDict[_KT, _VT]], Tuple[Callable[[_KT], Any], List[Tuple[_KT, _VT]]],
+        Type[SortedDict[_KT, _VT]],
+        Tuple[Callable[[_KT], Any], List[Tuple[_KT, _VT]]],
     ]: ...
     def __repr__(self) -> str: ...
     def _check(self) -> None: ...
     def islice(
-        self, start: Optional[int] = ..., stop: Optional[int] = ..., reverse=bool,
+        self,
+        start: Optional[int] = ...,
+        stop: Optional[int] = ...,
+        reverse=bool,
     ) -> Iterator[_KT]: ...
     def bisect_left(self, value: _KT) -> int: ...
     def bisect_right(self, value: _KT) -> int: ...

stubs/sortedcontainers/sortedlist.pyi

@@ -31,7 +31,9 @@ class SortedList(MutableSequence[_T]):
 
     DEFAULT_LOAD_FACTOR: int = ...
     def __init__(
-        self, iterable: Optional[Iterable[_T]] = ..., key: Optional[_Key[_T]] = ...,
+        self,
+        iterable: Optional[Iterable[_T]] = ...,
+        key: Optional[_Key[_T]] = ...,
     ): ...
     # NB: currently mypy does not honour return type, see mypy #3307
     @overload
@@ -76,10 +78,18 @@ class SortedList(MutableSequence[_T]):
     def __len__(self) -> int: ...
     def reverse(self) -> None: ...
     def islice(
-        self, start: Optional[int] = ..., stop: Optional[int] = ..., reverse=bool,
+        self,
+        start: Optional[int] = ...,
+        stop: Optional[int] = ...,
+        reverse=bool,
     ) -> Iterator[_T]: ...
     def _islice(
-        self, min_pos: int, min_idx: int, max_pos: int, max_idx: int, reverse: bool,
+        self,
+        min_pos: int,
+        min_idx: int,
+        max_pos: int,
+        max_idx: int,
+        reverse: bool,
     ) -> Iterator[_T]: ...
     def irange(
         self,

stubs/txredisapi.pyi

@@ -17,7 +17,9 @@
 """
 from typing import Any, List, Optional, Type, Union
 
-class RedisProtocol:
+from twisted.internet import protocol
+
+class RedisProtocol(protocol.Protocol):
     def publish(self, channel: str, message: bytes): ...
     async def ping(self) -> None: ...
     async def set(
@@ -52,7 +54,7 @@ def lazyConnection(
 
 class ConnectionHandler: ...
 
-class RedisFactory:
+class RedisFactory(protocol.ReconnectingClientFactory):
     continueTrying: bool
     handler: RedisProtocol
     pool: List[RedisProtocol]

synapse/__init__.py

@@ -48,7 +48,7 @@ try:
 except ImportError:
     pass
 
-__version__ = "1.27.0rc1"
+__version__ = "1.30.0"
 
 if bool(os.environ.get("SYNAPSE_TEST_PATCH_LOG_CONTEXTS", False)):
     # We import here so that we don't have to install a bunch of deps when

synapse/api/auth.py

@@ -39,6 +39,7 @@ from synapse.logging import opentracing as opentracing
 from synapse.storage.databases.main.registration import TokenLookupResult
 from synapse.types import StateMap, UserID
 from synapse.util.caches.lrucache import LruCache
+from synapse.util.macaroons import get_value_from_macaroon, satisfy_expiry
 from synapse.util.metrics import Measure
 
 logger = logging.getLogger(__name__)
@@ -163,12 +164,12 @@ class Auth:
 
     async def get_user_by_req(
         self,
-        request: Request,
+        request: SynapseRequest,
         allow_guest: bool = False,
         rights: str = "access",
         allow_expired: bool = False,
     ) -> synapse.types.Requester:
-        """ Get a registered user's ID.
+        """Get a registered user's ID.
 
         Args:
             request: An HTTP request with an access_token query parameter.
@@ -294,9 +295,12 @@ class Auth:
         return user_id, app_service
 
     async def get_user_by_access_token(
-        self, token: str, rights: str = "access", allow_expired: bool = False,
+        self,
+        token: str,
+        rights: str = "access",
+        allow_expired: bool = False,
     ) -> TokenLookupResult:
-        """ Validate access token and get user_id from it
+        """Validate access token and get user_id from it
 
         Args:
             token: The access token to get the user by
@@ -405,7 +409,7 @@ class Auth:
             raise _InvalidMacaroonException()
 
         try:
-            user_id = self.get_user_id_from_macaroon(macaroon)
+            user_id = get_value_from_macaroon(macaroon, "user_id")
 
             guest = False
             for caveat in macaroon.caveats:
@@ -413,7 +417,12 @@ class Auth:
                     guest = True
 
             self.validate_macaroon(macaroon, rights, user_id=user_id)
-        except (pymacaroons.exceptions.MacaroonException, TypeError, ValueError):
+        except (
+            pymacaroons.exceptions.MacaroonException,
+            KeyError,
+            TypeError,
+            ValueError,
+        ):
             raise InvalidClientTokenError("Invalid macaroon passed.")
 
         if rights == "access":
@@ -421,27 +430,6 @@ class Auth:
 
         return user_id, guest
 
-    def get_user_id_from_macaroon(self, macaroon):
-        """Retrieve the user_id given by the caveats on the macaroon.
-
-        Does *not* validate the macaroon.
-
-        Args:
-            macaroon (pymacaroons.Macaroon): The macaroon to validate
-
-        Returns:
-            (str) user id
-
-        Raises:
-            InvalidClientCredentialsError if there is no user_id caveat in the
-                macaroon
-        """
-        user_prefix = "user_id = "
-        for caveat in macaroon.caveats:
-            if caveat.caveat_id.startswith(user_prefix):
-                return caveat.caveat_id[len(user_prefix) :]
-        raise InvalidClientTokenError("No user caveat in macaroon")
-
     def validate_macaroon(self, macaroon, type_string, user_id):
         """
         validate that a Macaroon is understood by and was signed by this server.
@@ -462,21 +450,13 @@ class Auth:
         v.satisfy_exact("type = " + type_string)
         v.satisfy_exact("user_id = %s" % user_id)
         v.satisfy_exact("guest = true")
-        v.satisfy_general(self._verify_expiry)
+        satisfy_expiry(v, self.clock.time_msec)
 
         # access_tokens include a nonce for uniqueness: any value is acceptable
         v.satisfy_general(lambda c: c.startswith("nonce = "))
 
         v.verify(macaroon, self._macaroon_secret_key)
 
-    def _verify_expiry(self, caveat):
-        prefix = "time < "
-        if not caveat.startswith(prefix):
-            return False
-        expiry = int(caveat[len(prefix) :])
-        now = self.hs.get_clock().time_msec()
-        return now < expiry
-
     def get_appservice_by_req(self, request: SynapseRequest) -> ApplicationService:
         token = self.get_access_token_from_request(request)
         service = self.store.get_app_service_by_token(token)
@@ -489,7 +469,7 @@ class Auth:
         return service
 
     async def is_server_admin(self, user: UserID) -> bool:
-        """ Check if the given user is a local server admin.
+        """Check if the given user is a local server admin.
 
         Args:
             user: user to check
@@ -500,7 +480,10 @@ class Auth:
         return await self.store.is_server_admin(user)
 
     def compute_auth_events(
-        self, event, current_state_ids: StateMap[str], for_verification: bool = False,
+        self,
+        event,
+        current_state_ids: StateMap[str],
+        for_verification: bool = False,
     ) -> List[str]:
         """Given an event and current state return the list of event IDs used
         to auth an event.

synapse/api/constants.py

@@ -27,6 +27,11 @@ MAX_ALIAS_LENGTH = 255
 # the maximum length for a user id is 255 characters
 MAX_USERID_LENGTH = 255
 
+# The maximum length for a group id is 255 characters
+MAX_GROUPID_LENGTH = 255
+MAX_GROUP_CATEGORYID_LENGTH = 255
+MAX_GROUP_ROLEID_LENGTH = 255
+
 
 class Membership:
 
@@ -93,11 +98,14 @@ class EventTypes:
 
     Retention = "m.room.retention"
 
-    Presence = "m.presence"
-
     Dummy = "org.matrix.dummy_event"
 
 
+class EduTypes:
+    Presence = "m.presence"
+    RoomKeyRequest = "m.room_key_request"
+
+
 class RejectedReason:
     AUTH_ERROR = "auth_error"
 
@@ -128,8 +136,7 @@ class UserTypes:
 
 
 class RelationTypes:
-    """The types of relations known to this server.
-    """
+    """The types of relations known to this server."""
 
     ANNOTATION = "m.annotation"
     REPLACE = "m.replace"

synapse/api/errors.py

@@ -390,8 +390,7 @@ class InvalidCaptchaError(SynapseError):
 
 
 class LimitExceededError(SynapseError):
-    """A client has sent too many requests and is being throttled.
-    """
+    """A client has sent too many requests and is being throttled."""
 
     def __init__(
         self,
@@ -408,8 +407,7 @@ class LimitExceededError(SynapseError):
 
 
 class RoomKeysVersionError(SynapseError):
-    """A client has tried to upload to a non-current version of the room_keys store
-    """
+    """A client has tried to upload to a non-current version of the room_keys store"""
 
     def __init__(self, current_version: str):
         """
@@ -426,7 +424,9 @@ class UnsupportedRoomVersionError(SynapseError):
 
     def __init__(self, msg: str = "Homeserver does not support this room version"):
         super().__init__(
-            code=400, msg=msg, errcode=Codes.UNSUPPORTED_ROOM_VERSION,
+            code=400,
+            msg=msg,
+            errcode=Codes.UNSUPPORTED_ROOM_VERSION,
         )
 
 
@@ -461,8 +461,7 @@ class IncompatibleRoomVersionError(SynapseError):
 
 
 class PasswordRefusedError(SynapseError):
-    """A password has been refused, either during password reset/change or registration.
-    """
+    """A password has been refused, either during password reset/change or registration."""
 
     def __init__(
         self,
@@ -470,7 +469,9 @@ class PasswordRefusedError(SynapseError):
         errcode: str = Codes.WEAK_PASSWORD,
     ):
         super().__init__(
-            code=400, msg=msg, errcode=errcode,
+            code=400,
+            msg=msg,
+            errcode=errcode,
         )
 
 
@@ -493,7 +494,7 @@ class RequestSendFailed(RuntimeError):
 
 
 def cs_error(msg: str, code: str = Codes.UNKNOWN, **kwargs):
-    """ Utility method for constructing an error response for client-server
+    """Utility method for constructing an error response for client-server
     interactions.
 
     Args:
@@ -510,7 +511,7 @@ def cs_error(msg: str, code: str = Codes.UNKNOWN, **kwargs):
 
 
 class FederationError(RuntimeError):
-    """  This class is used to inform remote homeservers about erroneous
+    """This class is used to inform remote homeservers about erroneous
     PDUs they sent us.
 
     FATAL: The remote server could not interpret the source event.

synapse/api/presence.py

@@ -56,8 +56,7 @@ class UserPresenceState(
 
     @classmethod
     def default(cls, user_id):
-        """Returns a default presence state.
-        """
+        """Returns a default presence state."""
         return cls(
             user_id=user_id,
             state=PresenceState.OFFLINE,

synapse/api/ratelimiting.py

@@ -14,7 +14,7 @@
 # limitations under the License.
 
 from collections import OrderedDict
-from typing import Any, Optional, Tuple
+from typing import Hashable, Optional, Tuple
 
 from synapse.api.errors import LimitExceededError
 from synapse.types import Requester
@@ -42,7 +42,9 @@ class Ratelimiter:
         #   * How many times an action has occurred since a point in time
         #   * The point in time
         #   * The rate_hz of this particular entry. This can vary per request
-        self.actions = OrderedDict()  # type: OrderedDict[Any, Tuple[float, int, float]]
+        self.actions = (
+            OrderedDict()
+        )  # type: OrderedDict[Hashable, Tuple[float, int, float]]
 
     def can_requester_do_action(
         self,
@@ -82,7 +84,7 @@ class Ratelimiter:
 
     def can_do_action(
         self,
-        key: Any,
+        key: Hashable,
         rate_hz: Optional[float] = None,
         burst_count: Optional[int] = None,
         update: bool = True,
@@ -175,7 +177,7 @@ class Ratelimiter:
 
     def ratelimit(
         self,
-        key: Any,
+        key: Hashable,
         rate_hz: Optional[float] = None,
         burst_count: Optional[int] = None,
         update: bool = True,

synapse/api/urls.py

@@ -42,6 +42,8 @@ class ConsentURIBuilder:
         """
         if hs_config.form_secret is None:
             raise ConfigError("form_secret not set in config")
+        if hs_config.public_baseurl is None:
+            raise ConfigError("public_baseurl not set in config")
 
         self._hmac_secret = hs_config.form_secret.encode("utf-8")
         self._public_baseurl = hs_config.public_baseurl

synapse/app/__init__.py

@@ -17,8 +17,6 @@ import sys
 
 from synapse import python_dependencies  # noqa: E402
 
-sys.dont_write_bytecode = True
-
 logger = logging.getLogger(__name__)
 
 try:

synapse/app/_base.py

@@ -58,7 +58,7 @@ def register_sighup(func, *args, **kwargs):
 
 
 def start_worker_reactor(appname, config, run_command=reactor.run):
-    """ Run the reactor in the main process
+    """Run the reactor in the main process
 
     Daemonizes if necessary, and then configures some resources, before starting
     the reactor. Pulls configuration from the 'worker' settings in 'config'.
@@ -93,7 +93,7 @@ def start_reactor(
     logger,
     run_command=reactor.run,
 ):
-    """ Run the reactor in the main process
+    """Run the reactor in the main process
 
     Daemonizes if necessary, and then configures some resources, before starting
     the reactor
@@ -313,9 +313,7 @@ async def start(hs: "synapse.server.HomeServer", listeners: Iterable[ListenerCon
     refresh_certificate(hs)
 
     # Start the tracer
-    synapse.logging.opentracing.init_tracer(  # type: ignore[attr-defined] # noqa
-        hs
-    )
+    synapse.logging.opentracing.init_tracer(hs)  # type: ignore[attr-defined] # noqa
 
     # It is now safe to start your Synapse.
     hs.start_listening(listeners)
@@ -370,8 +368,7 @@ def setup_sentry(hs):
 
 
 def setup_sdnotify(hs):
-    """Adds process state hooks to tell systemd what we are up to.
-    """
+    """Adds process state hooks to tell systemd what we are up to."""
 
     # Tell systemd our state, if we're using it. This will silently fail if
     # we're not using systemd.
@@ -405,8 +402,7 @@ def install_dns_limiter(reactor, max_dns_requests_in_flight=100):
 
 
 class _LimitedHostnameResolver:
-    """Wraps a IHostnameResolver, limiting the number of in-flight DNS lookups.
-    """
+    """Wraps a IHostnameResolver, limiting the number of in-flight DNS lookups."""
 
     def __init__(self, resolver, max_dns_requests_in_flight):
         self._resolver = resolver

synapse/app/admin_cmd.py

@@ -210,7 +210,9 @@ def start(config_options):
     config.update_user_directory = False
     config.run_background_tasks = False
     config.start_pushers = False
+    config.pusher_shard_config.instances = []
     config.send_federation = False
+    config.federation_shard_config.instances = []
 
     synapse.events.USE_FROZEN_DICTS = config.use_frozen_dicts
 

synapse/app/generic_worker.py

@@ -23,6 +23,7 @@ from typing_extensions import ContextManager
 
 from twisted.internet import address
 from twisted.web.resource import IResource
+from twisted.web.server import Request
 
 import synapse
 import synapse.events
@@ -190,7 +191,7 @@ class KeyUploadServlet(RestServlet):
         self.http_client = hs.get_simple_http_client()
         self.main_uri = hs.config.worker_main_http_uri
 
-    async def on_POST(self, request, device_id):
+    async def on_POST(self, request: Request, device_id: Optional[str]):
         requester = await self.auth.get_user_by_req(request, allow_guest=True)
         user_id = requester.user.to_string()
         body = parse_json_object_from_request(request)
@@ -223,10 +224,12 @@ class KeyUploadServlet(RestServlet):
                 header: request.requestHeaders.getRawHeaders(header, [])
                 for header in (b"Authorization", b"User-Agent")
             }
-            # Add the previous hop the the X-Forwarded-For header.
+            # Add the previous hop to the X-Forwarded-For header.
             x_forwarded_for = request.requestHeaders.getRawHeaders(
                 b"X-Forwarded-For", []
             )
+            # we use request.client here, since we want the previous hop, not the
+            # original client (as returned by request.getClientAddress()).
             if isinstance(request.client, (address.IPv4Address, address.IPv6Address)):
                 previous_host = request.client.host.encode("ascii")
                 # If the header exists, add to the comma-separated list of the first
@@ -239,6 +242,14 @@ class KeyUploadServlet(RestServlet):
                     x_forwarded_for = [previous_host]
             headers[b"X-Forwarded-For"] = x_forwarded_for
 
+            # Replicate the original X-Forwarded-Proto header. Note that
+            # XForwardedForRequest overrides isSecure() to give us the original protocol
+            # used by the client, as opposed to the protocol used by our upstream proxy
+            # - which is what we want here.
+            headers[b"X-Forwarded-Proto"] = [
+                b"https" if request.isSecure() else b"http"
+            ]
+
             try:
                 result = await self.http_client.post_json_get_json(
                     self.main_uri + request.uri.decode("ascii"), body, headers=headers
@@ -421,8 +432,7 @@ class GenericWorkerPresence(BasePresenceHandler):
         ]
 
     async def set_state(self, target_user, state, ignore_status_msg=False):
-        """Set the presence state of the user.
-        """
+        """Set the presence state of the user."""
         presence = state["presence"]
 
         valid_presence = (
@@ -646,9 +656,6 @@ class GenericWorkerServer(HomeServer):
 
         self.get_tcp_replication().start_replication(self)
 
-    async def remove_pusher(self, app_id, push_key, user_id):
-        self.get_tcp_replication().send_remove_pusher(app_id, push_key, user_id)
-
     @cache_in_self
     def get_replication_data_handler(self):
         return GenericWorkerReplicationHandler(self)
@@ -923,22 +930,6 @@ def start(config_options):
         # For other worker types we force this to off.
         config.appservice.notify_appservices = False
 
-    if config.worker_app == "synapse.app.pusher":
-        if config.server.start_pushers:
-            sys.stderr.write(
-                "\nThe pushers must be disabled in the main synapse process"
-                "\nbefore they can be run in a separate worker."
-                "\nPlease add ``start_pushers: false`` to the main config"
-                "\n"
-            )
-            sys.exit(1)
-
-        # Force the pushers to start since they will be disabled in the main config
-        config.server.start_pushers = True
-    else:
-        # For other worker types we force this to off.
-        config.server.start_pushers = False
-
     if config.worker_app == "synapse.app.user_dir":
         if config.server.update_user_directory:
             sys.stderr.write(
@@ -955,22 +946,6 @@ def start(config_options):
         # For other worker types we force this to off.
         config.server.update_user_directory = False
 
-    if config.worker_app == "synapse.app.federation_sender":
-        if config.worker.send_federation:
-            sys.stderr.write(
-                "\nThe send_federation must be disabled in the main synapse process"
-                "\nbefore they can be run in a separate worker."
-                "\nPlease add ``send_federation: false`` to the main config"
-                "\n"
-            )
-            sys.exit(1)
-
-        # Force the pushers to start since they will be disabled in the main config
-        config.worker.send_federation = True
-    else:
-        # For other worker types we force this to off.
-        config.worker.send_federation = False
-
     synapse.events.USE_FROZEN_DICTS = config.use_frozen_dicts
 
     hs = GenericWorkerServer(

synapse/appservice/__init__.py

@@ -166,7 +166,10 @@ class ApplicationService:
 
     @cached(num_args=1, cache_context=True)
     async def matches_user_in_member_list(
-        self, room_id: str, store: "DataStore", cache_context: _CacheContext,
+        self,
+        room_id: str,
+        store: "DataStore",
+        cache_context: _CacheContext,
     ) -> bool:
         """Check if this service is interested a room based upon it's membership
 

synapse/appservice/api.py

@@ -76,9 +76,6 @@ def _is_valid_3pe_result(r, field):
     fields = r["fields"]
     if not isinstance(fields, dict):
         return False
-    for k in fields.keys():
-        if not isinstance(fields[k], str):
-            return False
 
     return True
 
@@ -93,7 +90,7 @@ class ApplicationServiceApi(SimpleHttpClient):
         self.clock = hs.get_clock()
 
         self.protocol_meta_cache = ResponseCache(
-            hs, "as_protocol_meta", timeout_ms=HOUR_IN_MS
+            hs.get_clock(), "as_protocol_meta", timeout_ms=HOUR_IN_MS
         )  # type: ResponseCache[Tuple[str, str]]
 
     async def query_user(self, service, user_id):
@@ -230,7 +227,9 @@ class ApplicationServiceApi(SimpleHttpClient):
 
         try:
             await self.put_json(
-                uri=uri, json_body=body, args={"access_token": service.hs_token},
+                uri=uri,
+                json_body=body,
+                args={"access_token": service.hs_token},
             )
             sent_transactions_counter.labels(service.id).inc()
             sent_events_counter.labels(service.id).inc(len(events))

synapse/appservice/scheduler.py

@@ -68,7 +68,7 @@ MAX_EPHEMERAL_EVENTS_PER_TRANSACTION = 100
 
 
 class ApplicationServiceScheduler:
-    """ Public facing API for this module. Does the required DI to tie the
+    """Public facing API for this module. Does the required DI to tie the
     components together. This also serves as the "event_pool", which in this
     case is a simple array.
     """

synapse/config/_base.py

@@ -21,7 +21,7 @@ import os
 from collections import OrderedDict
 from hashlib import sha256
 from textwrap import dedent
-from typing import Any, Iterable, List, MutableMapping, Optional
+from typing import Any, Iterable, List, MutableMapping, Optional, Union
 
 import attr
 import jinja2
@@ -147,7 +147,20 @@ class Config:
         return int(value) * size
 
     @staticmethod
-    def parse_duration(value):
+    def parse_duration(value: Union[str, int]) -> int:
+        """Convert a duration as a string or integer to a number of milliseconds.
+
+        If an integer is provided it is treated as milliseconds and is unchanged.
+
+        String durations can have a suffix of 's', 'm', 'h', 'd', 'w', or 'y'.
+        No suffix is treated as milliseconds.
+
+        Args:
+            value: The duration to parse.
+
+        Returns:
+            The number of milliseconds in the duration.
+        """
         if isinstance(value, int):
             return value
         second = 1000
@@ -199,9 +212,8 @@ class Config:
 
     @classmethod
     def read_file(cls, file_path, config_name):
-        cls.check_file(file_path, config_name)
-        with open(file_path) as file_stream:
-            return file_stream.read()
+        """Deprecated: call read_file directly"""
+        return read_file(file_path, (config_name,))
 
     def read_template(self, filename: str) -> jinja2.Template:
         """Load a template file from disk.
@@ -224,7 +236,9 @@ class Config:
         return self.read_templates([filename])[0]
 
     def read_templates(
-        self, filenames: List[str], custom_template_directory: Optional[str] = None,
+        self,
+        filenames: List[str],
+        custom_template_directory: Optional[str] = None,
     ) -> List[jinja2.Template]:
         """Load a list of template files from disk using the given variables.
 
@@ -264,7 +278,10 @@ class Config:
 
         # TODO: switch to synapse.util.templates.build_jinja_env
         loader = jinja2.FileSystemLoader(search_directories)
-        env = jinja2.Environment(loader=loader, autoescape=jinja2.select_autoescape(),)
+        env = jinja2.Environment(
+            loader=loader,
+            autoescape=jinja2.select_autoescape(),
+        )
 
         # Update the environment with our custom filters
         env.filters.update(
@@ -825,24 +842,24 @@ class ShardedWorkerHandlingConfig:
     instances = attr.ib(type=List[str])
 
     def should_handle(self, instance_name: str, key: str) -> bool:
-        """Whether this instance is responsible for handling the given key.
-        """
-        # If multiple instances are not defined we always return true
-        if not self.instances or len(self.instances) == 1:
-            return True
+        """Whether this instance is responsible for handling the given key."""
+        # If no instances are defined we assume some other worker is handling
+        # this.
+        if not self.instances:
+            return False
 
-        return self.get_instance(key) == instance_name
+        return self._get_instance(key) == instance_name
 
-    def get_instance(self, key: str) -> str:
+    def _get_instance(self, key: str) -> str:
         """Get the instance responsible for handling the given key.
 
-        Note: For things like federation sending the config for which instance
-        is sending is known only to the sender instance if there is only one.
-        Therefore `should_handle` should be used where possible.
+        Note: For federation sending and pushers the config for which instance
+        is sending is known only to the sender instance, so we don't expose this
+        method by default.
         """
 
         if not self.instances:
-            return "master"
+            raise Exception("Unknown worker")
 
         if len(self.instances) == 1:
             return self.instances[0]
@@ -859,4 +876,52 @@ class ShardedWorkerHandlingConfig:
         return self.instances[remainder]
 
 
-__all__ = ["Config", "RootConfig", "ShardedWorkerHandlingConfig"]
+@attr.s
+class RoutableShardedWorkerHandlingConfig(ShardedWorkerHandlingConfig):
+    """A version of `ShardedWorkerHandlingConfig` that is used for config
+    options where all instances know which instances are responsible for the
+    sharded work.
+    """
+
+    def __attrs_post_init__(self):
+        # We require that `self.instances` is non-empty.
+        if not self.instances:
+            raise Exception("Got empty list of instances for shard config")
+
+    def get_instance(self, key: str) -> str:
+        """Get the instance responsible for handling the given key."""
+        return self._get_instance(key)
+
+
+def read_file(file_path: Any, config_path: Iterable[str]) -> str:
+    """Check the given file exists, and read it into a string
+
+    If it does not, emit an error indicating the problem
+
+    Args:
+        file_path: the file to be read
+        config_path: where in the configuration file_path came from, so that a useful
+           error can be emitted if it does not exist.
+    Returns:
+        content of the file.
+    Raises:
+        ConfigError if there is a problem reading the file.
+    """
+    if not isinstance(file_path, str):
+        raise ConfigError("%r is not a string", config_path)
+
+    try:
+        os.stat(file_path)
+        with open(file_path) as file_stream:
+            return file_stream.read()
+    except OSError as e:
+        raise ConfigError("Error accessing file %r" % (file_path,), config_path) from e
+
+
+__all__ = [
+    "Config",
+    "RootConfig",
+    "ShardedWorkerHandlingConfig",
+    "RoutableShardedWorkerHandlingConfig",
+    "read_file",
+]

synapse/config/_base.pyi

@@ -149,4 +149,8 @@ class ShardedWorkerHandlingConfig:
     instances: List[str]
     def __init__(self, instances: List[str]) -> None: ...
     def should_handle(self, instance_name: str, key: str) -> bool: ...
+
+class RoutableShardedWorkerHandlingConfig(ShardedWorkerHandlingConfig):
     def get_instance(self, key: str) -> str: ...
+
+def read_file(file_path: Any, config_path: Iterable[str]) -> str: ...

synapse/config/auth.py

@@ -18,8 +18,7 @@ from ._base import Config
 
 
 class AuthConfig(Config):
-    """Password and login configuration
-    """
+    """Password and login configuration"""
 
     section = "auth"
 
@@ -38,7 +37,9 @@ class AuthConfig(Config):
 
         # User-interactive authentication
         ui_auth = config.get("ui_auth") or {}
-        self.ui_auth_session_timeout = ui_auth.get("session_timeout", 0)
+        self.ui_auth_session_timeout = self.parse_duration(
+            ui_auth.get("session_timeout", 0)
+        )
 
     def generate_config_section(self, config_dir_path, server_name, **kwargs):
         return """\
@@ -94,11 +95,11 @@ class AuthConfig(Config):
               #require_uppercase: true
 
         ui_auth:
-            # The number of milliseconds to allow a user-interactive authentication
-            # session to be active.
+            # The amount of time to allow a user-interactive authentication session
+            # to be active.
             #
             # This defaults to 0, meaning the user is queried for their credentials
-            # before every action, but this can be overridden to alow a single
+            # before every action, but this can be overridden to allow a single
             # validation to be re-used.  This weakens the protections afforded by
             # the user-interactive authentication process, by allowing for multiple
             # (and potentially different) operations to use the same validation session.
@@ -106,5 +107,5 @@ class AuthConfig(Config):
             # Uncomment below to allow for credential validation to last for 15
             # seconds.
             #
-            #session_timeout: 15000
+            #session_timeout: "15s"
         """

synapse/config/cas.py

@@ -13,7 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from ._base import Config
+from typing import Any, List
+
+from synapse.config.sso import SsoAttributeRequirement
+
+from ._base import Config, ConfigError
+from ._util import validate_config
 
 
 class CasConfig(Config):
@@ -30,20 +35,26 @@ class CasConfig(Config):
 
         if self.cas_enabled:
             self.cas_server_url = cas_config["server_url"]
-            public_base_url = cas_config.get("service_url") or self.public_baseurl
-            if public_base_url[-1] != "/":
-                public_base_url += "/"
+
+            # The public baseurl is required because it is used by the redirect
+            # template.
+            public_baseurl = self.public_baseurl
+            if not public_baseurl:
+                raise ConfigError("cas_config requires a public_baseurl to be set")
+
             # TODO Update this to a _synapse URL.
-            self.cas_service_url = (
-                public_base_url + "_matrix/client/r0/login/cas/ticket"
-            )
+            self.cas_service_url = public_baseurl + "_matrix/client/r0/login/cas/ticket"
             self.cas_displayname_attribute = cas_config.get("displayname_attribute")
-            self.cas_required_attributes = cas_config.get("required_attributes") or {}
+            required_attributes = cas_config.get("required_attributes") or {}
+            self.cas_required_attributes = _parsed_required_attributes_def(
+                required_attributes
+            )
+
         else:
             self.cas_server_url = None
             self.cas_service_url = None
             self.cas_displayname_attribute = None
-            self.cas_required_attributes = {}
+            self.cas_required_attributes = []
 
     def generate_config_section(self, config_dir_path, server_name, **kwargs):
         return """\
@@ -75,3 +86,22 @@ class CasConfig(Config):
           #  userGroup: "staff"
           #  department: None
         """
+
+
+# CAS uses a legacy required attributes mapping, not the one provided by
+# SsoAttributeRequirement.
+REQUIRED_ATTRIBUTES_SCHEMA = {
+    "type": "object",
+    "additionalProperties": {"anyOf": [{"type": "string"}, {"type": "null"}]},
+}
+
+
+def _parsed_required_attributes_def(
+    required_attributes: Any,
+) -> List[SsoAttributeRequirement]:
+    validate_config(
+        REQUIRED_ATTRIBUTES_SCHEMA,
+        required_attributes,
+        config_path=("cas_config", "required_attributes"),
+    )
+    return [SsoAttributeRequirement(k, v) for k, v in required_attributes.items()]

synapse/config/database.py

@@ -207,8 +207,7 @@ class DatabaseConfig(Config):
         )
 
     def get_single_database(self) -> DatabaseConnectionConfig:
-        """Returns the database if there is only one, useful for e.g. tests
-        """
+        """Returns the database if there is only one, useful for e.g. tests"""
         if not self.databases:
             raise Exception("More than one database exists")
 

synapse/config/emailconfig.py

@@ -166,6 +166,11 @@ class EmailConfig(Config):
             if not self.email_notif_from:
                 missing.append("email.notif_from")
 
+            # public_baseurl is required to build password reset and validation links that
+            # will be emailed to users
+            if config.get("public_baseurl") is None:
+                missing.append("public_baseurl")
+
             if missing:
                 raise ConfigError(
                     MISSING_PASSWORD_RESET_CONFIG_ERROR % (", ".join(missing),)
@@ -264,6 +269,9 @@ class EmailConfig(Config):
             if not self.email_notif_from:
                 missing.append("email.notif_from")
 
+            if config.get("public_baseurl") is None:
+                missing.append("public_baseurl")
+
             if missing:
                 raise ConfigError(
                     "email.enable_notifs is True but required keys are missing: %s"
@@ -281,7 +289,8 @@ class EmailConfig(Config):
                 self.email_notif_template_html,
                 self.email_notif_template_text,
             ) = self.read_templates(
-                [notif_template_html, notif_template_text], template_dir,
+                [notif_template_html, notif_template_text],
+                template_dir,
             )
 
             self.email_notif_for_new_users = email_config.get(
@@ -303,7 +312,8 @@ class EmailConfig(Config):
                 self.account_validity_template_html,
                 self.account_validity_template_text,
             ) = self.read_templates(
-                [expiry_template_html, expiry_template_text], template_dir,
+                [expiry_template_html, expiry_template_text],
+                template_dir,
             )
 
         subjects_config = email_config.get("subjects", {})

synapse/config/federation.py

@@ -41,6 +41,10 @@ class FederationConfig(Config):
         )
         self.federation_metrics_domains = set(federation_metrics_domains)
 
+        self.allow_profile_lookup_over_federation = config.get(
+            "allow_profile_lookup_over_federation", True
+        )
+
     def generate_config_section(self, config_dir_path, server_name, **kwargs):
         return """\
         ## Federation ##
@@ -66,6 +70,12 @@ class FederationConfig(Config):
         #federation_metrics_domains:
         #  - matrix.org
         #  - example.com
+
+        # Uncomment to disable profile lookup over federation. By default, the
+        # Federation API allows other homeservers to obtain profile data of any user
+        # on this homeserver. Defaults to 'true'.
+        #
+        #allow_profile_lookup_over_federation: false
         """
 
 

synapse/config/logger.py

@@ -21,8 +21,10 @@ import threading
 from string import Template
 
 import yaml
+from zope.interface import implementer
 
 from twisted.logger import (
+    ILogObserver,
     LogBeginner,
     STDLibLogObserver,
     eventAsText,
@@ -162,7 +164,10 @@ class LoggingConfig(Config):
         )
 
         logging_group.add_argument(
-            "-f", "--log-file", dest="log_file", help=argparse.SUPPRESS,
+            "-f",
+            "--log-file",
+            dest="log_file",
+            help=argparse.SUPPRESS,
         )
 
     def generate_files(self, config, config_dir_path):
@@ -224,7 +229,8 @@ def _setup_stdlib_logging(config, log_config_path, logBeginner: LogBeginner) ->
 
     threadlocal = threading.local()
 
-    def _log(event):
+    @implementer(ILogObserver)
+    def _log(event: dict) -> None:
         if "log_text" in event:
             if event["log_text"].startswith("DNSDatagramProtocol starting on "):
                 return

synapse/config/oidc_config.py

@@ -15,7 +15,7 @@
 # limitations under the License.
 
 from collections import Counter
-from typing import Iterable, Optional, Tuple, Type
+from typing import Iterable, Mapping, Optional, Tuple, Type
 
 import attr
 
@@ -25,7 +25,7 @@ from synapse.types import Collection, JsonDict
 from synapse.util.module_loader import load_module
 from synapse.util.stringutils import parse_and_validate_mxc_uri
 
-from ._base import Config, ConfigError
+from ._base import Config, ConfigError, read_file
 
 DEFAULT_USER_MAPPING_PROVIDER = "synapse.handlers.oidc_handler.JinjaOidcMappingProvider"
 
@@ -53,7 +53,10 @@ class OIDCConfig(Config):
                     "Multiple OIDC providers have the idp_id %r." % idp_id
                 )
 
-        self.oidc_callback_url = self.public_baseurl + "_synapse/client/oidc/callback"
+        public_baseurl = self.public_baseurl
+        if public_baseurl is None:
+            raise ConfigError("oidc_config requires a public_baseurl to be set")
+        self.oidc_callback_url = public_baseurl + "_synapse/client/oidc/callback"
 
     @property
     def oidc_enabled(self) -> bool:
@@ -94,7 +97,26 @@ class OIDCConfig(Config):
         #
         #   client_id: Required. oauth2 client id to use.
         #
-        #   client_secret: Required. oauth2 client secret to use.
+        #   client_secret: oauth2 client secret to use. May be omitted if
+        #        client_secret_jwt_key is given, or if client_auth_method is 'none'.
+        #
+        #   client_secret_jwt_key: Alternative to client_secret: details of a key used
+        #      to create a JSON Web Token to be used as an OAuth2 client secret. If
+        #      given, must be a dictionary with the following properties:
+        #
+        #          key: a pem-encoded signing key. Must be a suitable key for the
+        #              algorithm specified. Required unless 'key_file' is given.
+        #
+        #          key_file: the path to file containing a pem-encoded signing key file.
+        #              Required unless 'key' is given.
+        #
+        #          jwt_header: a dictionary giving properties to include in the JWT
+        #              header. Must include the key 'alg', giving the algorithm used to
+        #              sign the JWT, such as "ES256", using the JWA identifiers in
+        #              RFC7518.
+        #
+        #          jwt_payload: an optional dictionary giving properties to include in
+        #              the JWT payload. Normally this should include an 'iss' key.
         #
         #   client_auth_method: auth method to use when exchanging the token. Valid
         #       values are 'client_secret_basic' (default), 'client_secret_post' and
@@ -198,9 +220,9 @@ class OIDCConfig(Config):
           #  user_mapping_provider:
           #    config:
           #      subject_claim: "id"
-          #      localpart_template: "{{ user.login }}"
-          #      display_name_template: "{{ user.name }}"
-          #      email_template: "{{ user.email }}"
+          #      localpart_template: "{{{{ user.login }}}}"
+          #      display_name_template: "{{{{ user.name }}}}"
+          #      email_template: "{{{{ user.email }}}}"
 
           # For use with Keycloak
           #
@@ -215,7 +237,7 @@ class OIDCConfig(Config):
           #
           #- idp_id: github
           #  idp_name: Github
-          #  idp_brand: org.matrix.github
+          #  idp_brand: github
           #  discover: false
           #  issuer: "https://github.com/"
           #  client_id: "your-client-id" # TO BE FILLED
@@ -227,8 +249,8 @@ class OIDCConfig(Config):
           #  user_mapping_provider:
           #    config:
           #      subject_claim: "id"
-          #      localpart_template: "{{ user.login }}"
-          #      display_name_template: "{{ user.name }}"
+          #      localpart_template: "{{{{ user.login }}}}"
+          #      display_name_template: "{{{{ user.name }}}}"
         """.format(
             mapping_provider=DEFAULT_USER_MAPPING_PROVIDER
         )
@@ -237,7 +259,7 @@ class OIDCConfig(Config):
 # jsonschema definition of the configuration settings for an oidc identity provider
 OIDC_PROVIDER_CONFIG_SCHEMA = {
     "type": "object",
-    "required": ["issuer", "client_id", "client_secret"],
+    "required": ["issuer", "client_id"],
     "properties": {
         "idp_id": {
             "type": "string",
@@ -250,7 +272,12 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
         "idp_icon": {"type": "string"},
         "idp_brand": {
             "type": "string",
-            # MSC2758-style namespaced identifier
+            "minLength": 1,
+            "maxLength": 255,
+            "pattern": "^[a-z][a-z0-9_.-]*$",
+        },
+        "idp_unstable_brand": {
+            "type": "string",
             "minLength": 1,
             "maxLength": 255,
             "pattern": "^[a-z][a-z0-9_.-]*$",
@@ -259,6 +286,30 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
         "issuer": {"type": "string"},
         "client_id": {"type": "string"},
         "client_secret": {"type": "string"},
+        "client_secret_jwt_key": {
+            "type": "object",
+            "required": ["jwt_header"],
+            "oneOf": [
+                {"required": ["key"]},
+                {"required": ["key_file"]},
+            ],
+            "properties": {
+                "key": {"type": "string"},
+                "key_file": {"type": "string"},
+                "jwt_header": {
+                    "type": "object",
+                    "required": ["alg"],
+                    "properties": {
+                        "alg": {"type": "string"},
+                    },
+                    "additionalProperties": {"type": "string"},
+                },
+                "jwt_payload": {
+                    "type": "object",
+                    "additionalProperties": {"type": "string"},
+                },
+            },
+        },
         "client_auth_method": {
             "type": "string",
             # the following list is the same as the keys of
@@ -352,9 +403,10 @@ def _parse_oidc_config_dict(
     ump_config.setdefault("module", DEFAULT_USER_MAPPING_PROVIDER)
     ump_config.setdefault("config", {})
 
-    (user_mapping_provider_class, user_mapping_provider_config,) = load_module(
-        ump_config, config_path + ("user_mapping_provider",)
-    )
+    (
+        user_mapping_provider_class,
+        user_mapping_provider_config,
+    ) = load_module(ump_config, config_path + ("user_mapping_provider",))
 
     # Ensure loaded user mapping module has defined all necessary methods
     required_methods = [
@@ -369,7 +421,11 @@ def _parse_oidc_config_dict(
     if missing_methods:
         raise ConfigError(
             "Class %s is missing required "
-            "methods: %s" % (user_mapping_provider_class, ", ".join(missing_methods),),
+            "methods: %s"
+            % (
+                user_mapping_provider_class,
+                ", ".join(missing_methods),
+            ),
             config_path + ("user_mapping_provider", "module"),
         )
 
@@ -396,15 +452,31 @@ def _parse_oidc_config_dict(
                 "idp_icon must be a valid MXC URI", config_path + ("idp_icon",)
             ) from e
 
+    client_secret_jwt_key_config = oidc_config.get("client_secret_jwt_key")
+    client_secret_jwt_key = None  # type: Optional[OidcProviderClientSecretJwtKey]
+    if client_secret_jwt_key_config is not None:
+        keyfile = client_secret_jwt_key_config.get("key_file")
+        if keyfile:
+            key = read_file(keyfile, config_path + ("client_secret_jwt_key",))
+        else:
+            key = client_secret_jwt_key_config["key"]
+        client_secret_jwt_key = OidcProviderClientSecretJwtKey(
+            key=key,
+            jwt_header=client_secret_jwt_key_config["jwt_header"],
+            jwt_payload=client_secret_jwt_key_config.get("jwt_payload", {}),
+        )
+
     return OidcProviderConfig(
         idp_id=idp_id,
         idp_name=oidc_config.get("idp_name", "OIDC"),
         idp_icon=idp_icon,
         idp_brand=oidc_config.get("idp_brand"),
+        unstable_idp_brand=oidc_config.get("unstable_idp_brand"),
         discover=oidc_config.get("discover", True),
         issuer=oidc_config["issuer"],
         client_id=oidc_config["client_id"],
-        client_secret=oidc_config["client_secret"],
+        client_secret=oidc_config.get("client_secret"),
+        client_secret_jwt_key=client_secret_jwt_key,
         client_auth_method=oidc_config.get("client_auth_method", "client_secret_basic"),
         scopes=oidc_config.get("scopes", ["openid"]),
         authorization_endpoint=oidc_config.get("authorization_endpoint"),
@@ -419,6 +491,18 @@ def _parse_oidc_config_dict(
     )
 
 
+@attr.s(slots=True, frozen=True)
+class OidcProviderClientSecretJwtKey:
+    # a pem-encoded signing key
+    key = attr.ib(type=str)
+
+    # properties to include in the JWT header
+    jwt_header = attr.ib(type=Mapping[str, str])
+
+    # properties to include in the JWT payload.
+    jwt_payload = attr.ib(type=Mapping[str, str])
+
+
 @attr.s(slots=True, frozen=True)
 class OidcProviderConfig:
     # a unique identifier for this identity provider. Used in the 'user_external_ids'
@@ -434,6 +518,9 @@ class OidcProviderConfig:
     # Optional brand identifier for this IdP.
     idp_brand = attr.ib(type=Optional[str])
 
+    # Optional brand identifier for the unstable API (see MSC2858).
+    unstable_idp_brand = attr.ib(type=Optional[str])
+
     # whether the OIDC discovery mechanism is used to discover endpoints
     discover = attr.ib(type=bool)
 
@@ -444,8 +531,13 @@ class OidcProviderConfig:
     # oauth2 client id to use
     client_id = attr.ib(type=str)
 
-    # oauth2 client secret to use
-    client_secret = attr.ib(type=str)
+    # oauth2 client secret to use. if `None`, use client_secret_jwt_key to generate
+    # a secret.
+    client_secret = attr.ib(type=Optional[str])
+
+    # key to use to construct a JWT to use as a client secret. May be `None` if
+    # `client_secret` is set.
+    client_secret_jwt_key = attr.ib(type=Optional[OidcProviderClientSecretJwtKey])
 
     # auth method to use when exchanging the token.
     # Valid values are 'client_secret_basic', 'client_secret_post' and

synapse/config/push.py

@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from ._base import Config, ShardedWorkerHandlingConfig
+from ._base import Config
 
 
 class PushConfig(Config):
@@ -27,9 +27,6 @@ class PushConfig(Config):
             "group_unread_count_by_room", True
         )
 
-        pusher_instances = config.get("pusher_instances") or []
-        self.pusher_shard_config = ShardedWorkerHandlingConfig(pusher_instances)
-
         # There was a a 'redact_content' setting but mistakenly read from the
         # 'email'section'. Check for the flag in the 'push' section, and log,
         # but do not honour it to avoid nasty surprises when people upgrade.

synapse/config/ratelimiting.py

@@ -102,6 +102,16 @@ class RatelimitConfig(Config):
             defaults={"per_second": 0.01, "burst_count": 3},
         )
 
+        # Ratelimit cross-user key requests:
+        # * For local requests this is keyed by the sending device.
+        # * For requests received over federation this is keyed by the origin.
+        #
+        # Note that this isn't exposed in the configuration as it is obscure.
+        self.rc_key_requests = RateLimitConfig(
+            config.get("rc_key_requests", {}),
+            defaults={"per_second": 20, "burst_count": 100},
+        )
+
         self.rc_3pid_validation = RateLimitConfig(
             config.get("rc_3pid_validation") or {},
             defaults={"per_second": 0.003, "burst_count": 5},

synapse/config/registration.py

@@ -49,6 +49,10 @@ class AccountValidityConfig(Config):
 
             self.startup_job_max_delta = self.period * 10.0 / 100.0
 
+        if self.renew_by_email_enabled:
+            if "public_baseurl" not in synapse_config:
+                raise ConfigError("Can't send renewal emails without 'public_baseurl'")
+
         template_dir = config.get("template_dir")
 
         if not template_dir:
@@ -105,6 +109,13 @@ class RegistrationConfig(Config):
         account_threepid_delegates = config.get("account_threepid_delegates") or {}
         self.account_threepid_delegate_email = account_threepid_delegates.get("email")
         self.account_threepid_delegate_msisdn = account_threepid_delegates.get("msisdn")
+        if self.account_threepid_delegate_msisdn and not self.public_baseurl:
+            raise ConfigError(
+                "The configuration option `public_baseurl` is required if "
+                "`account_threepid_delegate.msisdn` is set, such that "
+                "clients know where to submit validation tokens to. Please "
+                "configure `public_baseurl`."
+            )
 
         self.default_identity_server = config.get("default_identity_server")
         self.allow_guest_access = config.get("allow_guest_access", False)
@@ -227,9 +238,8 @@ class RegistrationConfig(Config):
           # send an email to the account's email address with a renewal link. By
           # default, no such emails are sent.
           #
-          # If you enable this setting, you will also need to fill out the 'email'
-          # configuration section. You should also check that 'public_baseurl' is set
-          # correctly.
+          # If you enable this setting, you will also need to fill out the 'email' and
+          # 'public_baseurl' configuration sections.
           #
           #renew_at: 1w
 
@@ -320,7 +330,8 @@ class RegistrationConfig(Config):
         # The identity server which we suggest that clients should use when users log
         # in on this server.
         #
-        # (By default, no suggestion is made, so it is left up to the client.)
+        # (By default, no suggestion is made, so it is left up to the client.
+        # This setting is ignored unless public_baseurl is also set.)
         #
         #default_identity_server: https://matrix.org
 
@@ -345,6 +356,8 @@ class RegistrationConfig(Config):
         # by the Matrix Identity Service API specification:
         # https://matrix.org/docs/spec/identity_service/latest
         #
+        # If a delegate is specified, the config option public_baseurl must also be filled out.
+        #
         account_threepid_delegates:
             #email: https://example.com     # Delegate email sending to example.com
             #msisdn: http://localhost:8090  # Delegate SMS sending to this local process
@@ -378,6 +391,8 @@ class RegistrationConfig(Config):
         # By default, any room aliases included in this list will be created
         # as a publicly joinable room when the first user registers for the
         # homeserver. This behaviour can be customised with the settings below.
+        # If the room already exists, make certain it is a publicly joinable
+        # room. The join rule of the room must be set to 'public'.
         #
         #auto_join_rooms:
         #  - "#example:example.com"

synapse/config/repository.py

@@ -17,9 +17,7 @@ import os
 from collections import namedtuple
 from typing import Dict, List
 
-from netaddr import IPSet
-
-from synapse.config.server import DEFAULT_IP_RANGE_BLACKLIST
+from synapse.config.server import DEFAULT_IP_RANGE_BLACKLIST, generate_ip_set
 from synapse.python_dependencies import DependencyException, check_requirements
 from synapse.util.module_loader import load_module
 
@@ -54,7 +52,7 @@ MediaStorageProviderConfig = namedtuple(
 
 
 def parse_thumbnail_requirements(thumbnail_sizes):
-    """ Takes a list of dictionaries with "width", "height", and "method" keys
+    """Takes a list of dictionaries with "width", "height", and "method" keys
     and creates a map from image media types to the thumbnail size, thumbnailing
     method, and thumbnail media type to precalculate
 
@@ -187,16 +185,17 @@ class ContentRepositoryConfig(Config):
                     "to work"
                 )
 
-            self.url_preview_ip_range_blacklist = IPSet(
-                config["url_preview_ip_range_blacklist"]
-            )
-
             # we always blacklist '0.0.0.0' and '::', which are supposed to be
             # unroutable addresses.
-            self.url_preview_ip_range_blacklist.update(["0.0.0.0", "::"])
+            self.url_preview_ip_range_blacklist = generate_ip_set(
+                config["url_preview_ip_range_blacklist"],
+                ["0.0.0.0", "::"],
+                config_path=("url_preview_ip_range_blacklist",),
+            )
 
-            self.url_preview_ip_range_whitelist = IPSet(
-                config.get("url_preview_ip_range_whitelist", ())
+            self.url_preview_ip_range_whitelist = generate_ip_set(
+                config.get("url_preview_ip_range_whitelist", ()),
+                config_path=("url_preview_ip_range_whitelist",),
             )
 
             self.url_preview_url_blacklist = config.get("url_preview_url_blacklist", ())
@@ -207,7 +206,6 @@ class ContentRepositoryConfig(Config):
 
     def generate_config_section(self, data_dir_path, **kwargs):
         media_store = os.path.join(data_dir_path, "media_store")
-        uploads_path = os.path.join(data_dir_path, "uploads")
 
         formatted_thumbnail_sizes = "".join(
             THUMBNAIL_SIZE_YAML % s for s in DEFAULT_THUMBNAIL_SIZES

synapse/config/room_directory.py

@@ -123,7 +123,7 @@ class RoomDirectoryConfig(Config):
             alias (str)
 
         Returns:
-            boolean: True if user is allowed to crate the alias
+            boolean: True if user is allowed to create the alias
         """
         for rule in self._alias_creation_rules:
             if rule.matches(user_id, room_id, [alias]):

synapse/config/saml2_config.py

@@ -17,8 +17,7 @@
 import logging
 from typing import Any, List
 
-import attr
-
+from synapse.config.sso import SsoAttributeRequirement
 from synapse.python_dependencies import DependencyException, check_requirements
 from synapse.util.module_loader import load_module, load_python_module
 
@@ -189,6 +188,8 @@ class SAML2Config(Config):
         import saml2
 
         public_baseurl = self.public_baseurl
+        if public_baseurl is None:
+            raise ConfigError("saml2_config requires a public_baseurl to be set")
 
         if self.saml2_grandfathered_mxid_source_attribute:
             optional_attributes.add(self.saml2_grandfathered_mxid_source_attribute)
@@ -396,32 +397,18 @@ class SAML2Config(Config):
         }
 
 
-@attr.s(frozen=True)
-class SamlAttributeRequirement:
-    """Object describing a single requirement for SAML attributes."""
-
-    attribute = attr.ib(type=str)
-    value = attr.ib(type=str)
-
-    JSON_SCHEMA = {
-        "type": "object",
-        "properties": {"attribute": {"type": "string"}, "value": {"type": "string"}},
-        "required": ["attribute", "value"],
-    }
-
-
 ATTRIBUTE_REQUIREMENTS_SCHEMA = {
     "type": "array",
-    "items": SamlAttributeRequirement.JSON_SCHEMA,
+    "items": SsoAttributeRequirement.JSON_SCHEMA,
 }
 
 
 def _parse_attribute_requirements_def(
     attribute_requirements: Any,
-) -> List[SamlAttributeRequirement]:
+) -> List[SsoAttributeRequirement]:
     validate_config(
         ATTRIBUTE_REQUIREMENTS_SCHEMA,
         attribute_requirements,
-        config_path=["saml2_config", "attribute_requirements"],
+        config_path=("saml2_config", "attribute_requirements"),
     )
-    return [SamlAttributeRequirement(**x) for x in attribute_requirements]
+    return [SsoAttributeRequirement(**x) for x in attribute_requirements]

synapse/config/server.py

@@ -15,6 +15,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import itertools
 import logging
 import os.path
 import re
@@ -23,7 +24,7 @@ from typing import Any, Dict, Iterable, List, Optional, Set
 
 import attr
 import yaml
-from netaddr import IPSet
+from netaddr import AddrFormatError, IPNetwork, IPSet
 
 from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
 from synapse.util.stringutils import parse_and_validate_server_name
@@ -40,6 +41,71 @@ logger = logging.Logger(__name__)
 # in the list.
 DEFAULT_BIND_ADDRESSES = ["::", "0.0.0.0"]
 
+
+def _6to4(network: IPNetwork) -> IPNetwork:
+    """Convert an IPv4 network into a 6to4 IPv6 network per RFC 3056."""
+
+    # 6to4 networks consist of:
+    # * 2002 as the first 16 bits
+    # * The first IPv4 address in the network hex-encoded as the next 32 bits
+    # * The new prefix length needs to include the bits from the 2002 prefix.
+    hex_network = hex(network.first)[2:]
+    hex_network = ("0" * (8 - len(hex_network))) + hex_network
+    return IPNetwork(
+        "2002:%s:%s::/%d"
+        % (
+            hex_network[:4],
+            hex_network[4:],
+            16 + network.prefixlen,
+        )
+    )
+
+
+def generate_ip_set(
+    ip_addresses: Optional[Iterable[str]],
+    extra_addresses: Optional[Iterable[str]] = None,
+    config_path: Optional[Iterable[str]] = None,
+) -> IPSet:
+    """
+    Generate an IPSet from a list of IP addresses or CIDRs.
+
+    Additionally, for each IPv4 network in the list of IP addresses, also
+    includes the corresponding IPv6 networks.
+
+    This includes:
+
+    * IPv4-Compatible IPv6 Address (see RFC 4291, section 2.5.5.1)
+    * IPv4-Mapped IPv6 Address (see RFC 4291, section 2.5.5.2)
+    * 6to4 Address (see RFC 3056, section 2)
+
+    Args:
+        ip_addresses: An iterable of IP addresses or CIDRs.
+        extra_addresses: An iterable of IP addresses or CIDRs.
+        config_path: The path in the configuration for error messages.
+
+    Returns:
+        A new IP set.
+    """
+    result = IPSet()
+    for ip in itertools.chain(ip_addresses or (), extra_addresses or ()):
+        try:
+            network = IPNetwork(ip)
+        except AddrFormatError as e:
+            raise ConfigError(
+                "Invalid IP range provided: %s." % (ip,), config_path
+            ) from e
+        result.add(network)
+
+        # It is possible that these already exist in the set, but that's OK.
+        if ":" not in str(network):
+            result.add(IPNetwork(network).ipv6(ipv4_compatible=True))
+            result.add(IPNetwork(network).ipv6(ipv4_compatible=False))
+            result.add(_6to4(network))
+
+    return result
+
+
+# IP ranges that are considered private / unroutable / don't make sense.
 DEFAULT_IP_RANGE_BLACKLIST = [
     # Localhost
     "127.0.0.0/8",
@@ -53,6 +119,8 @@ DEFAULT_IP_RANGE_BLACKLIST = [
     "192.0.0.0/24",
     # Link-local networks.
     "169.254.0.0/16",
+    # Formerly used for 6to4 relay.
+    "192.88.99.0/24",
     # Testing networks.
     "198.18.0.0/15",
     "192.0.2.0/24",
@@ -66,6 +134,12 @@ DEFAULT_IP_RANGE_BLACKLIST = [
     "fe80::/10",
     # Unique local addresses.
     "fc00::/7",
+    # Testing networks.
+    "2001:db8::/32",
+    # Multicast.
+    "ff00::/8",
+    # Site-local addresses
+    "fec0::/10",
 ]
 
 DEFAULT_ROOM_VERSION = "6"
@@ -161,11 +235,7 @@ class ServerConfig(Config):
         self.print_pidfile = config.get("print_pidfile")
         self.user_agent_suffix = config.get("user_agent_suffix")
         self.use_frozen_dicts = config.get("use_frozen_dicts", False)
-        self.public_baseurl = config.get("public_baseurl") or "https://%s/" % (
-            self.server_name,
-        )
-        if self.public_baseurl[-1] != "/":
-            self.public_baseurl += "/"
+        self.public_baseurl = config.get("public_baseurl")
 
         # Whether to enable user presence.
         self.use_presence = config.get("use_presence", True)
@@ -189,7 +259,14 @@ class ServerConfig(Config):
         # Whether to require sharing a room with a user to retrieve their
         # profile data
         self.limit_profile_requests_to_users_who_share_rooms = config.get(
-            "limit_profile_requests_to_users_who_share_rooms", False,
+            "limit_profile_requests_to_users_who_share_rooms",
+            False,
+        )
+
+        # Whether to retrieve and display profile data for a user when they
+        # are invited to a room
+        self.include_profile_data_on_invite = config.get(
+            "include_profile_data_on_invite", True
         )
 
         if "restrict_public_rooms_to_local_users" in config and (
@@ -294,17 +371,15 @@ class ServerConfig(Config):
         )
 
         # Attempt to create an IPSet from the given ranges
-        try:
-            self.ip_range_blacklist = IPSet(ip_range_blacklist)
-        except Exception as e:
-            raise ConfigError("Invalid range(s) provided in ip_range_blacklist.") from e
-        # Always blacklist 0.0.0.0, ::
-        self.ip_range_blacklist.update(["0.0.0.0", "::"])
 
-        try:
-            self.ip_range_whitelist = IPSet(config.get("ip_range_whitelist", ()))
-        except Exception as e:
-            raise ConfigError("Invalid range(s) provided in ip_range_whitelist.") from e
+        # Always blacklist 0.0.0.0, ::
+        self.ip_range_blacklist = generate_ip_set(
+            ip_range_blacklist, ["0.0.0.0", "::"], config_path=("ip_range_blacklist",)
+        )
+
+        self.ip_range_whitelist = generate_ip_set(
+            config.get("ip_range_whitelist", ()), config_path=("ip_range_whitelist",)
+        )
 
         # The federation_ip_range_blacklist is used for backwards-compatibility
         # and only applies to federation and identity servers. If it is not given,
@@ -312,16 +387,16 @@ class ServerConfig(Config):
         federation_ip_range_blacklist = config.get(
             "federation_ip_range_blacklist", ip_range_blacklist
         )
-        try:
-            self.federation_ip_range_blacklist = IPSet(federation_ip_range_blacklist)
-        except Exception as e:
-            raise ConfigError(
-                "Invalid range(s) provided in federation_ip_range_blacklist."
-            ) from e
         # Always blacklist 0.0.0.0, ::
-        self.federation_ip_range_blacklist.update(["0.0.0.0", "::"])
+        self.federation_ip_range_blacklist = generate_ip_set(
+            federation_ip_range_blacklist,
+            ["0.0.0.0", "::"],
+            config_path=("federation_ip_range_blacklist",),
+        )
 
-        self.start_pushers = config.get("start_pushers", True)
+        if self.public_baseurl is not None:
+            if self.public_baseurl[-1] != "/":
+                self.public_baseurl += "/"
 
         # (undocumented) option for torturing the worker-mode replication a bit,
         # for testing. The value defines the number of milliseconds to pause before
@@ -550,7 +625,9 @@ class ServerConfig(Config):
         if manhole:
             self.listeners.append(
                 ListenerConfig(
-                    port=manhole, bind_addresses=["127.0.0.1"], type="manhole",
+                    port=manhole,
+                    bind_addresses=["127.0.0.1"],
+                    type="manhole",
                 )
             )
 
@@ -586,7 +663,8 @@ class ServerConfig(Config):
         # and letting the client know which email address is bound to an account and
         # which one isn't.
         self.request_token_inhibit_3pid_errors = config.get(
-            "request_token_inhibit_3pid_errors", False,
+            "request_token_inhibit_3pid_errors",
+            False,
         )
 
         # List of users trialing the new experimental default push rules. This setting is
@@ -748,10 +826,6 @@ class ServerConfig(Config):
         # Otherwise, it should be the URL to reach Synapse's client HTTP listener (see
         # 'listeners' below).
         #
-        # If this is left unset, it defaults to 'https://<server_name>/'. (Note that
-        # that will not work unless you configure Synapse or a reverse-proxy to listen
-        # on port 443.)
-        #
         #public_baseurl: https://example.com/
 
         # Set the soft limit on the number of file descriptors synapse can use
@@ -767,8 +841,7 @@ class ServerConfig(Config):
         # Whether to require authentication to retrieve profile data (avatars,
         # display names) of other users through the client API. Defaults to
         # 'false'. Note that profile data is also available via the federation
-        # API, so this setting is of limited value if federation is enabled on
-        # the server.
+        # API, unless allow_profile_lookup_over_federation is set to false.
         #
         #require_auth_for_profile_requests: true
 
@@ -779,6 +852,14 @@ class ServerConfig(Config):
         #
         #limit_profile_requests_to_users_who_share_rooms: true
 
+        # Uncomment to prevent a user's profile data from being retrieved and
+        # displayed in a room until they have joined it. By default, a user's
+        # profile data is included in an invite event, regardless of the values
+        # of the above two settings, and whether or not the users share a server.
+        # Defaults to 'true'.
+        #
+        #include_profile_data_on_invite: false
+
         # If set to 'true', removes the need for authentication to access the server's
         # public rooms directory through the client API, meaning that anyone can
         # query the room directory. Defaults to 'false'.

synapse/config/sso.py

@@ -12,14 +12,30 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from typing import Any, Dict
+from typing import Any, Dict, Optional
+
+import attr
 
 from ._base import Config
 
 
+@attr.s(frozen=True)
+class SsoAttributeRequirement:
+    """Object describing a single requirement for SSO attributes."""
+
+    attribute = attr.ib(type=str)
+    # If a value is not given, than the attribute must simply exist.
+    value = attr.ib(type=Optional[str])
+
+    JSON_SCHEMA = {
+        "type": "object",
+        "properties": {"attribute": {"type": "string"}, "value": {"type": "string"}},
+        "required": ["attribute", "value"],
+    }
+
+
 class SSOConfig(Config):
-    """SSO Configuration
-    """
+    """SSO Configuration"""
 
     section = "sso"
 
@@ -64,8 +80,11 @@ class SSOConfig(Config):
         # gracefully to the client). This would make it pointless to ask the user for
         # confirmation, since the URL the confirmation page would be showing wouldn't be
         # the client's.
-        login_fallback_url = self.public_baseurl + "_matrix/static/client/login"
-        self.sso_client_whitelist.append(login_fallback_url)
+        # public_baseurl is an optional setting, so we only add the fallback's URL to the
+        # list if it's provided (because we can't figure out what that URL is otherwise).
+        if self.public_baseurl:
+            login_fallback_url = self.public_baseurl + "_matrix/static/client/login"
+            self.sso_client_whitelist.append(login_fallback_url)
 
     def generate_config_section(self, **kwargs):
         return """\
@@ -83,9 +102,9 @@ class SSOConfig(Config):
             # phishing attacks from evil.site. To avoid this, include a slash after the
             # hostname: "https://my.client/".
             #
-            # The login fallback page (used by clients that don't natively support the
-            # required login flows) is automatically whitelisted in addition to any URLs
-            # in this list.
+            # If public_baseurl is set, then the login fallback page (used by clients
+            # that don't natively support the required login flows) is whitelisted in
+            # addition to any URLs in this list.
             #
             # By default, this list is empty.
             #
@@ -106,8 +125,7 @@ class SSOConfig(Config):
             #
             #   When rendering, this template is given the following variables:
             #     * redirect_url: the URL that the user will be redirected to after
-            #       login. Needs manual escaping (see
-            #       https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
+            #       login.
             #
             #     * server_name: the homeserver's name.
             #
@@ -185,15 +203,12 @@ class SSOConfig(Config):
             #
             #   When rendering, this template is given the following variables:
             #
-            #     * redirect_url: the URL the user is about to be redirected to. Needs
-            #                     manual escaping (see
-            #                     https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
+            #     * redirect_url: the URL the user is about to be redirected to.
             #
             #     * display_url: the same as `redirect_url`, but with the query
             #                    parameters stripped. The intention is to have a
             #                    human-readable URL to show to users, not to use it as
-            #                    the final address to redirect to. Needs manual escaping
-            #                    (see https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
+            #                    the final address to redirect to.
             #
             #     * server_name: the homeserver's name.
             #
@@ -213,9 +228,7 @@ class SSOConfig(Config):
             #   process: 'sso_auth_confirm.html'.
             #
             #   When rendering, this template is given the following variables:
-            #     * redirect_url: the URL the user is about to be redirected to. Needs
-            #                     manual escaping (see
-            #                     https://jinja.palletsprojects.com/en/2.11.x/templates/#html-escaping).
+            #     * redirect_url: the URL the user is about to be redirected to.
             #
             #     * description: the operation which the user is being asked to confirm
             #

synapse/config/stats.py

@@ -13,10 +13,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
+import logging
 
 from ._base import Config
 
+ROOM_STATS_DISABLED_WARN = """\
+WARNING: room/user statistics have been disabled via the stats.enabled
+configuration setting. This means that certain features (such as the room
+directory) will not operate correctly. Future versions of Synapse may ignore
+this setting.
+
+To fix this warning, remove the stats.enabled setting from your configuration
+file.
+--------------------------------------------------------------------------------"""
+
+logger = logging.getLogger(__name__)
+
 
 class StatsConfig(Config):
     """Stats Configuration
@@ -28,30 +40,29 @@ class StatsConfig(Config):
     def read_config(self, config, **kwargs):
         self.stats_enabled = True
         self.stats_bucket_size = 86400 * 1000
-        self.stats_retention = sys.maxsize
         stats_config = config.get("stats", None)
         if stats_config:
             self.stats_enabled = stats_config.get("enabled", self.stats_enabled)
             self.stats_bucket_size = self.parse_duration(
                 stats_config.get("bucket_size", "1d")
             )
-            self.stats_retention = self.parse_duration(
-                stats_config.get("retention", "%ds" % (sys.maxsize,))
-            )
+        if not self.stats_enabled:
+            logger.warning(ROOM_STATS_DISABLED_WARN)
 
     def generate_config_section(self, config_dir_path, server_name, **kwargs):
         return """
-        # Local statistics collection. Used in populating the room directory.
+        # Settings for local room and user statistics collection. See
+        # docs/room_and_user_statistics.md.
         #
-        # 'bucket_size' controls how large each statistics timeslice is. It can
-        # be defined in a human readable short form -- e.g. "1d", "1y".
-        #
-        # 'retention' controls how long historical statistics will be kept for.
-        # It can be defined in a human readable short form -- e.g. "1d", "1y".
-        #
-        #
-        #stats:
-        #   enabled: true
-        #   bucket_size: 1d
-        #   retention: 1y
+        stats:
+          # Uncomment the following to disable room and user statistics. Note that doing
+          # so may cause certain features (such as the room directory) not to work
+          # correctly.
+          #
+          #enabled: false
+
+          # The size of each timeslice in the room_stats_historical and
+          # user_stats_historical tables, as a time period. Defaults to "1d".
+          #
+          #bucket_size: 1h
         """

synapse/config/user_directory.py

@@ -24,32 +24,46 @@ class UserDirectoryConfig(Config):
     section = "userdirectory"
 
     def read_config(self, config, **kwargs):
-        self.user_directory_search_enabled = True
-        self.user_directory_search_all_users = False
-        user_directory_config = config.get("user_directory", None)
-        if user_directory_config:
-            self.user_directory_search_enabled = user_directory_config.get(
-                "enabled", True
-            )
-            self.user_directory_search_all_users = user_directory_config.get(
-                "search_all_users", False
-            )
+        user_directory_config = config.get("user_directory") or {}
+        self.user_directory_search_enabled = user_directory_config.get("enabled", True)
+        self.user_directory_search_all_users = user_directory_config.get(
+            "search_all_users", False
+        )
+        self.user_directory_search_prefer_local_users = user_directory_config.get(
+            "prefer_local_users", False
+        )
 
     def generate_config_section(self, config_dir_path, server_name, **kwargs):
         return """
         # User Directory configuration
         #
-        # 'enabled' defines whether users can search the user directory. If
-        # false then empty responses are returned to all queries. Defaults to
-        # true.
-        #
-        # 'search_all_users' defines whether to search all users visible to your HS
-        # when searching the user directory, rather than limiting to users visible
-        # in public rooms.  Defaults to false.  If you set it True, you'll have to
-        # rebuild the user_directory search indexes, see
-        # https://github.com/matrix-org/synapse/blob/master/docs/user_directory.md
-        #
-        #user_directory:
-        #  enabled: true
-        #  search_all_users: false
+        user_directory:
+            # Defines whether users can search the user directory. If false then
+            # empty responses are returned to all queries. Defaults to true.
+            #
+            # Uncomment to disable the user directory.
+            #
+            #enabled: false
+
+            # Defines whether to search all users visible to your HS when searching
+            # the user directory, rather than limiting to users visible in public
+            # rooms. Defaults to false.
+            #
+            # If you set it true, you'll have to rebuild the user_directory search
+            # indexes, see:
+            # https://github.com/matrix-org/synapse/blob/master/docs/user_directory.md
+            #
+            # Uncomment to return search results containing all known users, even if that
+            # user does not share a room with the requester.
+            #
+            #search_all_users: true
+
+            # Defines whether to prefer local users in search query results.
+            # If True, local users are more likely to appear above remote users
+            # when searching the user directory. Defaults to false.
+            #
+            # Uncomment to prefer local over remote users in user directory search
+            # results.
+            #
+            #prefer_local_users: true
         """

synapse/config/workers.py

@@ -17,9 +17,28 @@ from typing import List, Union
 
 import attr
 
-from ._base import Config, ConfigError, ShardedWorkerHandlingConfig
+from ._base import (
+    Config,
+    ConfigError,
+    RoutableShardedWorkerHandlingConfig,
+    ShardedWorkerHandlingConfig,
+)
 from .server import ListenerConfig, parse_listener_def
 
+_FEDERATION_SENDER_WITH_SEND_FEDERATION_ENABLED_ERROR = """
+The send_federation config option must be disabled in the main
+synapse process before they can be run in a separate worker.
+
+Please add ``send_federation: false`` to the main config
+"""
+
+_PUSHER_WITH_START_PUSHERS_ENABLED_ERROR = """
+The start_pushers config option must be disabled in the main
+synapse process before they can be run in a separate worker.
+
+Please add ``start_pushers: false`` to the main config
+"""
+
 
 def _instance_to_list_converter(obj: Union[str, List[str]]) -> List[str]:
     """Helper for allowing parsing a string or list of strings to a config
@@ -33,8 +52,7 @@ def _instance_to_list_converter(obj: Union[str, List[str]]) -> List[str]:
 
 @attr.s
 class InstanceLocationConfig:
-    """The host and port to talk to an instance via HTTP replication.
-    """
+    """The host and port to talk to an instance via HTTP replication."""
 
     host = attr.ib(type=str)
     port = attr.ib(type=int)
@@ -54,13 +72,19 @@ class WriterLocations:
     )
     typing = attr.ib(default="master", type=str)
     to_device = attr.ib(
-        default=["master"], type=List[str], converter=_instance_to_list_converter,
+        default=["master"],
+        type=List[str],
+        converter=_instance_to_list_converter,
     )
     account_data = attr.ib(
-        default=["master"], type=List[str], converter=_instance_to_list_converter,
+        default=["master"],
+        type=List[str],
+        converter=_instance_to_list_converter,
     )
     receipts = attr.ib(
-        default=["master"], type=List[str], converter=_instance_to_list_converter,
+        default=["master"],
+        type=List[str],
+        converter=_instance_to_list_converter,
     )
 
 
@@ -98,6 +122,7 @@ class WorkerConfig(Config):
         self.worker_replication_secret = config.get("worker_replication_secret", None)
 
         self.worker_name = config.get("worker_name", self.worker_app)
+        self.instance_name = self.worker_name or "master"
 
         self.worker_main_http_uri = config.get("worker_main_http_uri", None)
 
@@ -107,16 +132,47 @@ class WorkerConfig(Config):
         if manhole:
             self.worker_listeners.append(
                 ListenerConfig(
-                    port=manhole, bind_addresses=["127.0.0.1"], type="manhole",
+                    port=manhole,
+                    bind_addresses=["127.0.0.1"],
+                    type="manhole",
                 )
             )
 
-        # Whether to send federation traffic out in this process. This only
-        # applies to some federation traffic, and so shouldn't be used to
-        # "disable" federation
-        self.send_federation = config.get("send_federation", True)
+        # Handle federation sender configuration.
+        #
+        # There are two ways of configuring which instances handle federation
+        # sending:
+        #   1. The old way where "send_federation" is set to false and running a
+        #      `synapse.app.federation_sender` worker app.
+        #   2. Specifying the workers sending federation in
+        #      `federation_sender_instances`.
+        #
 
-        federation_sender_instances = config.get("federation_sender_instances") or []
+        send_federation = config.get("send_federation", True)
+
+        federation_sender_instances = config.get("federation_sender_instances")
+        if federation_sender_instances is None:
+            # Default to an empty list, which means "another, unknown, worker is
+            # responsible for it".
+            federation_sender_instances = []
+
+            # If no federation sender instances are set we check if
+            # `send_federation` is set, which means use master
+            if send_federation:
+                federation_sender_instances = ["master"]
+
+            if self.worker_app == "synapse.app.federation_sender":
+                if send_federation:
+                    # If we're running federation senders, and not using
+                    # `federation_sender_instances`, then we should have
+                    # explicitly set `send_federation` to false.
+                    raise ConfigError(
+                        _FEDERATION_SENDER_WITH_SEND_FEDERATION_ENABLED_ERROR
+                    )
+
+                federation_sender_instances = [self.worker_name]
+
+        self.send_federation = self.instance_name in federation_sender_instances
         self.federation_shard_config = ShardedWorkerHandlingConfig(
             federation_sender_instances
         )
@@ -157,7 +213,37 @@ class WorkerConfig(Config):
                 "Must only specify one instance to handle `receipts` messages."
             )
 
-        self.events_shard_config = ShardedWorkerHandlingConfig(self.writers.events)
+        if len(self.writers.events) == 0:
+            raise ConfigError("Must specify at least one instance to handle `events`.")
+
+        self.events_shard_config = RoutableShardedWorkerHandlingConfig(
+            self.writers.events
+        )
+
+        # Handle sharded push
+        start_pushers = config.get("start_pushers", True)
+        pusher_instances = config.get("pusher_instances")
+        if pusher_instances is None:
+            # Default to an empty list, which means "another, unknown, worker is
+            # responsible for it".
+            pusher_instances = []
+
+            # If no pushers instances are set we check if `start_pushers` is
+            # set, which means use master
+            if start_pushers:
+                pusher_instances = ["master"]
+
+            if self.worker_app == "synapse.app.pusher":
+                if start_pushers:
+                    # If we're running pushers, and not using
+                    # `pusher_instances`, then we should have explicitly set
+                    # `start_pushers` to false.
+                    raise ConfigError(_PUSHER_WITH_START_PUSHERS_ENABLED_ERROR)
+
+                pusher_instances = [self.instance_name]
+
+        self.start_pushers = self.instance_name in pusher_instances
+        self.pusher_shard_config = ShardedWorkerHandlingConfig(pusher_instances)
 
         # Whether this worker should run background tasks or not.
         #

synapse/event_auth.py

@@ -42,7 +42,7 @@ def check(
     do_sig_check: bool = True,
     do_size_check: bool = True,
 ) -> None:
-    """ Checks if this event is correctly authed.
+    """Checks if this event is correctly authed.
 
     Args:
         room_version_obj: the version of the room
@@ -423,7 +423,9 @@ def _can_send_event(event: EventBase, auth_events: StateMap[EventBase]) -> bool:
 
 
 def check_redaction(
-    room_version_obj: RoomVersion, event: EventBase, auth_events: StateMap[EventBase],
+    room_version_obj: RoomVersion,
+    event: EventBase,
+    auth_events: StateMap[EventBase],
 ) -> bool:
     """Check whether the event sender is allowed to redact the target event.
 
@@ -459,7 +461,9 @@ def check_redaction(
 
 
 def _check_power_levels(
-    room_version_obj: RoomVersion, event: EventBase, auth_events: StateMap[EventBase],
+    room_version_obj: RoomVersion,
+    event: EventBase,
+    auth_events: StateMap[EventBase],
 ) -> None:
     user_list = event.content.get("users", {})
     # Validate users

synapse/events/builder.py

@@ -98,7 +98,9 @@ class EventBuilder:
         return self._state_key is not None
 
     async def build(
-        self, prev_event_ids: List[str], auth_event_ids: Optional[List[str]],
+        self,
+        prev_event_ids: List[str],
+        auth_event_ids: Optional[List[str]],
     ) -> EventBase:
         """Transform into a fully signed and hashed event
 

synapse/events/snapshot.py

@@ -341,8 +341,7 @@ def _encode_state_dict(state_dict):
 
 
 def _decode_state_dict(input):
-    """Decodes a state dict encoded using `_encode_state_dict` above
-    """
+    """Decodes a state dict encoded using `_encode_state_dict` above"""
     if input is None:
         return None
 

synapse/events/spamcheck.py

@@ -15,8 +15,11 @@
 # limitations under the License.
 
 import inspect
+import logging
 from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, Union
 
+from synapse.rest.media.v1._base import FileInfo
+from synapse.rest.media.v1.media_storage import ReadableFileWrapper
 from synapse.spam_checker_api import RegistrationBehaviour
 from synapse.types import Collection
 from synapse.util.async_helpers import maybe_awaitable
@@ -25,6 +28,8 @@ if TYPE_CHECKING:
     import synapse.events
     import synapse.server
 
+logger = logging.getLogger(__name__)
+
 
 class SpamChecker:
     def __init__(self, hs: "synapse.server.HomeServer"):
@@ -188,6 +193,7 @@ class SpamChecker:
         email_threepid: Optional[dict],
         username: Optional[str],
         request_info: Collection[Tuple[str, str]],
+        auth_provider_id: Optional[str] = None,
     ) -> RegistrationBehaviour:
         """Checks if we should allow the given registration request.
 
@@ -196,6 +202,9 @@ class SpamChecker:
             username: The request user name, if any
             request_info: List of tuples of user agent and IP that
                 were used during the registration process.
+            auth_provider_id: The SSO IdP the user used, e.g "oidc", "saml",
+                "cas". If any. Note this does not include users registered
+                via a password provider.
 
         Returns:
             Enum for how the request should be handled
@@ -206,11 +215,72 @@ class SpamChecker:
             # spam checker
             checker = getattr(spam_checker, "check_registration_for_spam", None)
             if checker:
-                behaviour = await maybe_awaitable(
-                    checker(email_threepid, username, request_info)
-                )
+                # Provide auth_provider_id if the function supports it
+                checker_args = inspect.signature(checker)
+                if len(checker_args.parameters) == 4:
+                    d = checker(
+                        email_threepid,
+                        username,
+                        request_info,
+                        auth_provider_id,
+                    )
+                elif len(checker_args.parameters) == 3:
+                    d = checker(email_threepid, username, request_info)
+                else:
+                    logger.error(
+                        "Invalid signature for %s.check_registration_for_spam. Denying registration",
+                        spam_checker.__module__,
+                    )
+                    return RegistrationBehaviour.DENY
+
+                behaviour = await maybe_awaitable(d)
                 assert isinstance(behaviour, RegistrationBehaviour)
                 if behaviour != RegistrationBehaviour.ALLOW:
                     return behaviour
 
         return RegistrationBehaviour.ALLOW
+
+    async def check_media_file_for_spam(
+        self, file_wrapper: ReadableFileWrapper, file_info: FileInfo
+    ) -> bool:
+        """Checks if a piece of newly uploaded media should be blocked.
+
+        This will be called for local uploads, downloads of remote media, each
+        thumbnail generated for those, and web pages/images used for URL
+        previews.
+
+        Note that care should be taken to not do blocking IO operations in the
+        main thread. For example, to get the contents of a file a module
+        should do::
+
+            async def check_media_file_for_spam(
+                self, file: ReadableFileWrapper, file_info: FileInfo
+            ) -> bool:
+                buffer = BytesIO()
+                await file.write_chunks_to(buffer.write)
+
+                if buffer.getvalue() == b"Hello World":
+                    return True
+
+                return False
+
+
+        Args:
+            file: An object that allows reading the contents of the media.
+            file_info: Metadata about the file.
+
+        Returns:
+            True if the media should be blocked or False if it should be
+            allowed.
+        """
+
+        for spam_checker in self.spam_checkers:
+            # For backwards compatibility, only run if the method exists on the
+            # spam checker
+            checker = getattr(spam_checker, "check_media_file_for_spam", None)
+            if checker:
+                spam = await maybe_awaitable(checker(file_wrapper, file_info))
+                if spam:
+                    return True
+
+        return False

synapse/events/third_party_rules.py

@@ -40,7 +40,8 @@ class ThirdPartyEventRules:
 
         if module is not None:
             self.third_party_rules = module(
-                config=config, module_api=hs.get_module_api(),
+                config=config,
+                module_api=hs.get_module_api(),
             )
 
     async def check_event_allowed(

synapse/events/utils.py

@@ -34,7 +34,7 @@ SPLIT_FIELD_REGEX = re.compile(r"(?<!\\)\.")
 
 
 def prune_event(event: EventBase) -> EventBase:
-    """ Returns a pruned version of the given event, which removes all keys we
+    """Returns a pruned version of the given event, which removes all keys we
     don't know about or think could potentially be dodgy.
 
     This is used when we "redact" an event. We want to remove all fields that

synapse/federation/federation_client.py

@@ -750,7 +750,11 @@ class FederationClient(FederationBase):
         return resp[1]
 
     async def send_invite(
-        self, destination: str, room_id: str, event_id: str, pdu: EventBase,
+        self,
+        destination: str,
+        room_id: str,
+        event_id: str,
+        pdu: EventBase,
     ) -> EventBase:
         room_version = await self.store.get_room_version(room_id)
 

synapse/federation/federation_server.py

@@ -22,6 +22,7 @@ from typing import (
     Awaitable,
     Callable,
     Dict,
+    Iterable,
     List,
     Optional,
     Tuple,
@@ -34,7 +35,7 @@ from twisted.internet import defer
 from twisted.internet.abstract import isIPAddress
 from twisted.python import failure
 
-from synapse.api.constants import EventTypes, Membership
+from synapse.api.constants import EduTypes, EventTypes, Membership
 from synapse.api.errors import (
     AuthError,
     Codes,
@@ -44,6 +45,7 @@ from synapse.api.errors import (
     SynapseError,
     UnsupportedRoomVersionError,
 )
+from synapse.api.ratelimiting import Ratelimiter
 from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
 from synapse.events import EventBase
 from synapse.federation.federation_base import FederationBase, event_from_pdu_json
@@ -85,19 +87,19 @@ received_queries_counter = Counter(
 )
 
 pdu_process_time = Histogram(
-    "synapse_federation_server_pdu_process_time", "Time taken to process an event",
+    "synapse_federation_server_pdu_process_time",
+    "Time taken to process an event",
 )
 
-
-last_pdu_age_metric = Gauge(
-    "synapse_federation_last_received_pdu_age",
-    "The age (in seconds) of the last PDU successfully received from the given domain",
+last_pdu_ts_metric = Gauge(
+    "synapse_federation_last_received_pdu_time",
+    "The timestamp of the last PDU which was successfully received from the given domain",
     labelnames=("server_name",),
 )
 
 
 class FederationServer(FederationBase):
-    def __init__(self, hs):
+    def __init__(self, hs: "HomeServer"):
         super().__init__(hs)
 
         self.auth = hs.get_auth()
@@ -110,14 +112,15 @@ class FederationServer(FederationBase):
         # with FederationHandlerRegistry.
         hs.get_directory_handler()
 
-        self._federation_ratelimiter = hs.get_federation_ratelimiter()
-
         self._server_linearizer = Linearizer("fed_server")
-        self._transaction_linearizer = Linearizer("fed_txn_handler")
+
+        # origins that we are currently processing a transaction from.
+        # a dict from origin to txn id.
+        self._active_transactions = {}  # type: Dict[str, str]
 
         # We cache results for transaction with the same ID
         self._transaction_resp_cache = ResponseCache(
-            hs, "fed_txn_handler", timeout_ms=30000
+            hs.get_clock(), "fed_txn_handler", timeout_ms=30000
         )  # type: ResponseCache[Tuple[str, str]]
 
         self.transaction_actions = TransactionActions(self.store)
@@ -127,10 +130,10 @@ class FederationServer(FederationBase):
         # We cache responses to state queries, as they take a while and often
         # come in waves.
         self._state_resp_cache = ResponseCache(
-            hs, "state_resp", timeout_ms=30000
+            hs.get_clock(), "state_resp", timeout_ms=30000
         )  # type: ResponseCache[Tuple[str, str]]
         self._state_ids_resp_cache = ResponseCache(
-            hs, "state_ids_resp", timeout_ms=30000
+            hs.get_clock(), "state_ids_resp", timeout_ms=30000
         )  # type: ResponseCache[Tuple[str, str]]
 
         self._federation_metrics_domains = (
@@ -167,6 +170,33 @@ class FederationServer(FederationBase):
 
         logger.debug("[%s] Got transaction", transaction_id)
 
+        # Reject malformed transactions early: reject if too many PDUs/EDUs
+        if len(transaction.pdus) > 50 or (  # type: ignore
+            hasattr(transaction, "edus") and len(transaction.edus) > 100  # type: ignore
+        ):
+            logger.info("Transaction PDU or EDU count too large. Returning 400")
+            return 400, {}
+
+        # we only process one transaction from each origin at a time. We need to do
+        # this check here, rather than in _on_incoming_transaction_inner so that we
+        # don't cache the rejection in _transaction_resp_cache (so that if the txn
+        # arrives again later, we can process it).
+        current_transaction = self._active_transactions.get(origin)
+        if current_transaction and current_transaction != transaction_id:
+            logger.warning(
+                "Received another txn %s from %s while still processing %s",
+                transaction_id,
+                origin,
+                current_transaction,
+            )
+            return 429, {
+                "errcode": Codes.UNKNOWN,
+                "error": "Too many concurrent transactions",
+            }
+
+        # CRITICAL SECTION: we must now not await until we populate _active_transactions
+        # in _on_incoming_transaction_inner.
+
         # We wrap in a ResponseCache so that we de-duplicate retried
         # transactions.
         return await self._transaction_resp_cache.wrap(
@@ -180,31 +210,23 @@ class FederationServer(FederationBase):
     async def _on_incoming_transaction_inner(
         self, origin: str, transaction: Transaction, request_time: int
     ) -> Tuple[int, Dict[str, Any]]:
-        # Use a linearizer to ensure that transactions from a remote are
-        # processed in order.
-        with await self._transaction_linearizer.queue(origin):
-            # We rate limit here *after* we've queued up the incoming requests,
-            # so that we don't fill up the ratelimiter with blocked requests.
-            #
-            # This is important as the ratelimiter allows N concurrent requests
-            # at a time, and only starts ratelimiting if there are more requests
-            # than that being processed at a time. If we queued up requests in
-            # the linearizer/response cache *after* the ratelimiting then those
-            # queued up requests would count as part of the allowed limit of N
-            # concurrent requests.
-            with self._federation_ratelimiter.ratelimit(origin) as d:
-                await d
+        # CRITICAL SECTION: the first thing we must do (before awaiting) is
+        # add an entry to _active_transactions.
+        assert origin not in self._active_transactions
+        self._active_transactions[origin] = transaction.transaction_id  # type: ignore
 
-                result = await self._handle_incoming_transaction(
-                    origin, transaction, request_time
-                )
-
-        return result
+        try:
+            result = await self._handle_incoming_transaction(
+                origin, transaction, request_time
+            )
+            return result
+        finally:
+            del self._active_transactions[origin]
 
     async def _handle_incoming_transaction(
         self, origin: str, transaction: Transaction, request_time: int
     ) -> Tuple[int, Dict[str, Any]]:
-        """ Process an incoming transaction and return the HTTP response
+        """Process an incoming transaction and return the HTTP response
 
         Args:
             origin: the server making the request
@@ -225,19 +247,6 @@ class FederationServer(FederationBase):
 
         logger.debug("[%s] Transaction is new", transaction.transaction_id)  # type: ignore
 
-        # Reject if PDU count > 50 or EDU count > 100
-        if len(transaction.pdus) > 50 or (  # type: ignore
-            hasattr(transaction, "edus") and len(transaction.edus) > 100  # type: ignore
-        ):
-
-            logger.info("Transaction PDU or EDU count too large. Returning 400")
-
-            response = {}
-            await self.transaction_actions.set_response(
-                origin, transaction, 400, response
-            )
-            return 400, response
-
         # We process PDUs and EDUs in parallel. This is important as we don't
         # want to block things like to device messages from reaching clients
         # behind the potentially expensive handling of PDUs.
@@ -333,48 +342,53 @@ class FederationServer(FederationBase):
         # impose a limit to avoid going too crazy with ram/cpu.
 
         async def process_pdus_for_room(room_id: str):
-            logger.debug("Processing PDUs for %s", room_id)
-            try:
-                await self.check_server_matches_acl(origin_host, room_id)
-            except AuthError as e:
-                logger.warning("Ignoring PDUs for room %s from banned server", room_id)
-                for pdu in pdus_by_room[room_id]:
-                    event_id = pdu.event_id
-                    pdu_results[event_id] = e.error_dict()
-                return
+            with nested_logging_context(room_id):
+                logger.debug("Processing PDUs for %s", room_id)
 
-            for pdu in pdus_by_room[room_id]:
-                event_id = pdu.event_id
-                with pdu_process_time.time():
-                    with nested_logging_context(event_id):
-                        try:
-                            await self._handle_received_pdu(origin, pdu)
-                            pdu_results[event_id] = {}
-                        except FederationError as e:
-                            logger.warning("Error handling PDU %s: %s", event_id, e)
-                            pdu_results[event_id] = {"error": str(e)}
-                        except Exception as e:
-                            f = failure.Failure()
-                            pdu_results[event_id] = {"error": str(e)}
-                            logger.error(
-                                "Failed to handle PDU %s",
-                                event_id,
-                                exc_info=(f.type, f.value, f.getTracebackObject()),
-                            )
+                try:
+                    await self.check_server_matches_acl(origin_host, room_id)
+                except AuthError as e:
+                    logger.warning(
+                        "Ignoring PDUs for room %s from banned server", room_id
+                    )
+                    for pdu in pdus_by_room[room_id]:
+                        event_id = pdu.event_id
+                        pdu_results[event_id] = e.error_dict()
+                    return
+
+                for pdu in pdus_by_room[room_id]:
+                    pdu_results[pdu.event_id] = await process_pdu(pdu)
+
+        async def process_pdu(pdu: EventBase) -> JsonDict:
+            event_id = pdu.event_id
+            with pdu_process_time.time():
+                with nested_logging_context(event_id):
+                    try:
+                        await self._handle_received_pdu(origin, pdu)
+                        return {}
+                    except FederationError as e:
+                        logger.warning("Error handling PDU %s: %s", event_id, e)
+                        return {"error": str(e)}
+                    except Exception as e:
+                        f = failure.Failure()
+                        logger.error(
+                            "Failed to handle PDU %s",
+                            event_id,
+                            exc_info=(f.type, f.value, f.getTracebackObject()),  # type: ignore
+                        )
+                        return {"error": str(e)}
 
         await concurrently_execute(
             process_pdus_for_room, pdus_by_room.keys(), TRANSACTION_CONCURRENCY_LIMIT
         )
 
         if newest_pdu_ts and origin in self._federation_metrics_domains:
-            newest_pdu_age = self._clock.time_msec() - newest_pdu_ts
-            last_pdu_age_metric.labels(server_name=origin).set(newest_pdu_age / 1000)
+            last_pdu_ts_metric.labels(server_name=origin).set(newest_pdu_ts / 1000)
 
         return pdu_results
 
     async def _handle_edus_in_txn(self, origin: str, transaction: Transaction):
-        """Process the EDUs in a received transaction.
-        """
+        """Process the EDUs in a received transaction."""
 
         async def _process_edu(edu_dict):
             received_edus_counter.inc()
@@ -437,25 +451,32 @@ class FederationServer(FederationBase):
             raise AuthError(403, "Host not in room.")
 
         resp = await self._state_ids_resp_cache.wrap(
-            (room_id, event_id), self._on_state_ids_request_compute, room_id, event_id,
+            (room_id, event_id),
+            self._on_state_ids_request_compute,
+            room_id,
+            event_id,
         )
 
         return 200, resp
 
     async def _on_state_ids_request_compute(self, room_id, event_id):
         state_ids = await self.handler.get_state_ids_for_pdu(room_id, event_id)
-        auth_chain_ids = await self.store.get_auth_chain_ids(state_ids)
+        auth_chain_ids = await self.store.get_auth_chain_ids(room_id, state_ids)
         return {"pdu_ids": state_ids, "auth_chain_ids": auth_chain_ids}
 
     async def _on_context_state_request_compute(
         self, room_id: str, event_id: str
     ) -> Dict[str, list]:
         if event_id:
-            pdus = await self.handler.get_state_for_pdu(room_id, event_id)
+            pdus = await self.handler.get_state_for_pdu(
+                room_id, event_id
+            )  # type: Iterable[EventBase]
         else:
             pdus = (await self.state.get_current_state(room_id)).values()
 
-        auth_chain = await self.store.get_auth_chain([pdu.event_id for pdu in pdus])
+        auth_chain = await self.store.get_auth_chain(
+            room_id, [pdu.event_id for pdu in pdus]
+        )
 
         return {
             "pdus": [pdu.get_pdu_json() for pdu in pdus],
@@ -679,7 +700,7 @@ class FederationServer(FederationBase):
         )
 
     async def _handle_received_pdu(self, origin: str, pdu: EventBase) -> None:
-        """ Process a PDU received in a federation /send/ transaction.
+        """Process a PDU received in a federation /send/ transaction.
 
         If the event is invalid, then this method throws a FederationError.
         (The error will then be logged and sent back to the sender (which
@@ -859,13 +880,22 @@ class FederationHandlerRegistry:
         self.edu_handlers = (
             {}
         )  # type: Dict[str, Callable[[str, dict], Awaitable[None]]]
-        self.query_handlers = {}  # type: Dict[str, Callable[[dict], Awaitable[None]]]
+        self.query_handlers = (
+            {}
+        )  # type: Dict[str, Callable[[dict], Awaitable[JsonDict]]]
 
         # Map from type to instance names that we should route EDU handling to.
         # We randomly choose one instance from the list to route to for each new
         # EDU received.
         self._edu_type_to_instance = {}  # type: Dict[str, List[str]]
 
+        # A rate limiter for incoming room key requests per origin.
+        self._room_key_request_rate_limiter = Ratelimiter(
+            clock=self.clock,
+            rate_hz=self.config.rc_key_requests.per_second,
+            burst_count=self.config.rc_key_requests.burst_count,
+        )
+
     def register_edu_handler(
         self, edu_type: str, handler: Callable[[str, JsonDict], Awaitable[None]]
     ):
@@ -886,7 +916,7 @@ class FederationHandlerRegistry:
         self.edu_handlers[edu_type] = handler
 
     def register_query_handler(
-        self, query_type: str, handler: Callable[[dict], defer.Deferred]
+        self, query_type: str, handler: Callable[[dict], Awaitable[JsonDict]]
     ):
         """Sets the handler callable that will be used to handle an incoming
         federation query of the given type.
@@ -906,17 +936,23 @@ class FederationHandlerRegistry:
         self.query_handlers[query_type] = handler
 
     def register_instance_for_edu(self, edu_type: str, instance_name: str):
-        """Register that the EDU handler is on a different instance than master.
-        """
+        """Register that the EDU handler is on a different instance than master."""
         self._edu_type_to_instance[edu_type] = [instance_name]
 
     def register_instances_for_edu(self, edu_type: str, instance_names: List[str]):
-        """Register that the EDU handler is on multiple instances.
-        """
+        """Register that the EDU handler is on multiple instances."""
         self._edu_type_to_instance[edu_type] = instance_names
 
     async def on_edu(self, edu_type: str, origin: str, content: dict):
-        if not self.config.use_presence and edu_type == "m.presence":
+        if not self.config.use_presence and edu_type == EduTypes.Presence:
+            return
+
+        # If the incoming room key requests from a particular origin are over
+        # the limit, drop them.
+        if (
+            edu_type == EduTypes.RoomKeyRequest
+            and not self._room_key_request_rate_limiter.can_do_action(origin)
+        ):
             return
 
         # Check if we have a handler on this instance
@@ -953,7 +989,7 @@ class FederationHandlerRegistry:
         # Oh well, let's just log and move on.
         logger.warning("No handler registered for EDU type %s", edu_type)
 
-    async def on_query(self, query_type: str, args: dict):
+    async def on_query(self, query_type: str, args: dict) -> JsonDict:
         handler = self.query_handlers.get(query_type)
         if handler:
             return await handler(args)

synapse/federation/persistence.py

@@ -30,8 +30,7 @@ logger = logging.getLogger(__name__)
 
 
 class TransactionActions:
-    """ Defines persistence actions that relate to handling Transactions.
-    """
+    """Defines persistence actions that relate to handling Transactions."""
 
     def __init__(self, datastore):
         self.store = datastore
@@ -57,8 +56,7 @@ class TransactionActions:
     async def set_response(
         self, origin: str, transaction: Transaction, code: int, response: JsonDict
     ) -> None:
-        """Persist how we responded to a transaction.
-        """
+        """Persist how we responded to a transaction."""
         transaction_id = transaction.transaction_id  # type: ignore
         if not transaction_id:
             raise RuntimeError("Cannot persist a transaction with no transaction_id")

synapse/federation/send_queue.py

@@ -468,8 +468,7 @@ class KeyedEduRow(
 
 
 class EduRow(BaseFederationRow, namedtuple("EduRow", ("edu",))):  # Edu
-    """Streams EDUs that don't have keys. See KeyedEduRow
-    """
+    """Streams EDUs that don't have keys. See KeyedEduRow"""
 
     TypeId = "e"
 
@@ -519,7 +518,10 @@ def process_rows_for_federation(transaction_queue, rows):
     # them into the appropriate collection and then send them off.
 
     buff = ParsedFederationStreamData(
-        presence=[], presence_destinations=[], keyed_edus={}, edus={},
+        presence=[],
+        presence_destinations=[],
+        keyed_edus={},
+        edus={},
     )
 
     # Parse the rows in the stream and add to the buffer

synapse/federation/sender/__init__.py

@@ -328,7 +328,9 @@ class FederationSender:
         # to allow us to perform catch-up later on if the remote is unreachable
         # for a while.
         await self.store.store_destination_rooms_entries(
-            destinations, pdu.room_id, pdu.internal_metadata.stream_ordering,
+            destinations,
+            pdu.room_id,
+            pdu.internal_metadata.stream_ordering,
         )
 
         for destination in destinations:
@@ -472,10 +474,10 @@ class FederationSender:
             self._processing_pending_presence = False
 
     def send_presence_to_destinations(
-        self, states: List[UserPresenceState], destinations: List[str]
+        self, states: Iterable[UserPresenceState], destinations: Iterable[str]
     ) -> None:
         """Send the given presence states to the given destinations.
-            destinations (list[str])
+        destinations (list[str])
         """
 
         if not states or not self.hs.config.use_presence:
@@ -616,8 +618,8 @@ class FederationSender:
         last_processed = None  # type: Optional[str]
 
         while True:
-            destinations_to_wake = await self.store.get_catch_up_outstanding_destinations(
-                last_processed
+            destinations_to_wake = (
+                await self.store.get_catch_up_outstanding_destinations(last_processed)
             )
 
             if not destinations_to_wake:

synapse/federation/sender/per_destination_queue.py

@@ -17,6 +17,7 @@ import datetime
 import logging
 from typing import TYPE_CHECKING, Dict, Hashable, Iterable, List, Optional, Tuple, cast
 
+import attr
 from prometheus_client import Counter
 
 from synapse.api.errors import (
@@ -85,13 +86,18 @@ class PerDestinationQueue:
             # processing. We have a guard in `attempt_new_transaction` that
             # ensure we don't start sending stuff.
             logger.error(
-                "Create a per destination queue for %s on wrong worker", destination,
+                "Create a per destination queue for %s on wrong worker",
+                destination,
             )
             self._should_send_on_this_instance = False
 
         self._destination = destination
         self.transmission_loop_running = False
 
+        # Flag to signal to any running transmission loop that there is new data
+        # queued up to be sent.
+        self._new_data_to_send = False
+
         # True whilst we are sending events that the remote homeserver missed
         # because it was unreachable. We start in this state so we can perform
         # catch-up at startup.
@@ -107,7 +113,7 @@ class PerDestinationQueue:
         # destination (we are the only updater so this is safe)
         self._last_successful_stream_ordering = None  # type: Optional[int]
 
-        # a list of pending PDUs
+        # a queue of pending PDUs
         self._pending_pdus = []  # type: List[EventBase]
 
         # XXX this is never actually used: see
@@ -207,6 +213,10 @@ class PerDestinationQueue:
         transaction in the background.
         """
 
+        # Mark that we (may) have new things to send, so that any running
+        # transmission loop will recheck whether there is stuff to send.
+        self._new_data_to_send = True
+
         if self.transmission_loop_running:
             # XXX: this can get stuck on by a never-ending
             # request at which point pending_pdus just keeps growing.
@@ -249,125 +259,41 @@ class PerDestinationQueue:
 
             pending_pdus = []
             while True:
-                # We have to keep 2 free slots for presence and rr_edus
-                limit = MAX_EDUS_PER_TRANSACTION - 2
+                self._new_data_to_send = False
 
-                device_update_edus, dev_list_id = await self._get_device_update_edus(
-                    limit
-                )
-
-                limit -= len(device_update_edus)
-
-                (
-                    to_device_edus,
-                    device_stream_id,
-                ) = await self._get_to_device_message_edus(limit)
-
-                pending_edus = device_update_edus + to_device_edus
-
-                # BEGIN CRITICAL SECTION
-                #
-                # In order to avoid a race condition, we need to make sure that
-                # the following code (from popping the queues up to the point
-                # where we decide if we actually have any pending messages) is
-                # atomic - otherwise new PDUs or EDUs might arrive in the
-                # meantime, but not get sent because we hold the
-                # transmission_loop_running flag.
-
-                pending_pdus = self._pending_pdus
-
-                # We can only include at most 50 PDUs per transactions
-                pending_pdus, self._pending_pdus = pending_pdus[:50], pending_pdus[50:]
-
-                pending_edus.extend(self._get_rr_edus(force_flush=False))
-                pending_presence = self._pending_presence
-                self._pending_presence = {}
-                if pending_presence:
-                    pending_edus.append(
-                        Edu(
-                            origin=self._server_name,
-                            destination=self._destination,
-                            edu_type="m.presence",
-                            content={
-                                "push": [
-                                    format_user_presence_state(
-                                        presence, self._clock.time_msec()
-                                    )
-                                    for presence in pending_presence.values()
-                                ]
-                            },
-                        )
-                    )
-
-                pending_edus.extend(
-                    self._pop_pending_edus(MAX_EDUS_PER_TRANSACTION - len(pending_edus))
-                )
-                while (
-                    len(pending_edus) < MAX_EDUS_PER_TRANSACTION
-                    and self._pending_edus_keyed
+                async with _TransactionQueueManager(self) as (
+                    pending_pdus,
+                    pending_edus,
                 ):
-                    _, val = self._pending_edus_keyed.popitem()
-                    pending_edus.append(val)
+                    if not pending_pdus and not pending_edus:
+                        logger.debug("TX [%s] Nothing to send", self._destination)
 
-                if pending_pdus:
-                    logger.debug(
-                        "TX [%s] len(pending_pdus_by_dest[dest]) = %d",
-                        self._destination,
-                        len(pending_pdus),
+                        # If we've gotten told about new things to send during
+                        # checking for things to send, we try looking again.
+                        # Otherwise new PDUs or EDUs might arrive in the meantime,
+                        # but not get sent because we hold the
+                        # `transmission_loop_running` flag.
+                        if self._new_data_to_send:
+                            continue
+                        else:
+                            return
+
+                    if pending_pdus:
+                        logger.debug(
+                            "TX [%s] len(pending_pdus_by_dest[dest]) = %d",
+                            self._destination,
+                            len(pending_pdus),
+                        )
+
+                    await self._transaction_manager.send_new_transaction(
+                        self._destination, pending_pdus, pending_edus
                     )
 
-                if not pending_pdus and not pending_edus:
-                    logger.debug("TX [%s] Nothing to send", self._destination)
-                    self._last_device_stream_id = device_stream_id
-                    return
-
-                # if we've decided to send a transaction anyway, and we have room, we
-                # may as well send any pending RRs
-                if len(pending_edus) < MAX_EDUS_PER_TRANSACTION:
-                    pending_edus.extend(self._get_rr_edus(force_flush=True))
-
-                # END CRITICAL SECTION
-
-                success = await self._transaction_manager.send_new_transaction(
-                    self._destination, pending_pdus, pending_edus
-                )
-                if success:
                     sent_transactions_counter.inc()
                     sent_edus_counter.inc(len(pending_edus))
                     for edu in pending_edus:
                         sent_edus_by_type.labels(edu.edu_type).inc()
-                    # Remove the acknowledged device messages from the database
-                    # Only bother if we actually sent some device messages
-                    if to_device_edus:
-                        await self._store.delete_device_msgs_for_remote(
-                            self._destination, device_stream_id
-                        )
 
-                    # also mark the device updates as sent
-                    if device_update_edus:
-                        logger.info(
-                            "Marking as sent %r %r", self._destination, dev_list_id
-                        )
-                        await self._store.mark_as_sent_devices_by_remote(
-                            self._destination, dev_list_id
-                        )
-
-                    self._last_device_stream_id = device_stream_id
-                    self._last_device_list_stream_id = dev_list_id
-
-                    if pending_pdus:
-                        # we sent some PDUs and it was successful, so update our
-                        # last_successful_stream_ordering in the destinations table.
-                        final_pdu = pending_pdus[-1]
-                        last_successful_stream_ordering = (
-                            final_pdu.internal_metadata.stream_ordering
-                        )
-                        assert last_successful_stream_ordering
-                        await self._store.set_destination_last_successful_stream_ordering(
-                            self._destination, last_successful_stream_ordering
-                        )
-                else:
-                    break
         except NotRetryingDestination as e:
             logger.debug(
                 "TX [%s] not ready for retry yet (next retry at %s) - "
@@ -400,7 +326,7 @@ class PerDestinationQueue:
                 self._pending_presence = {}
                 self._pending_rrs = {}
 
-            self._start_catching_up()
+                self._start_catching_up()
         except FederationDeniedError as e:
             logger.info(e)
         except HttpResponseException as e:
@@ -411,7 +337,6 @@ class PerDestinationQueue:
                 e,
             )
 
-            self._start_catching_up()
         except RequestSendFailed as e:
             logger.warning(
                 "TX [%s] Failed to send transaction: %s", self._destination, e
@@ -421,16 +346,12 @@ class PerDestinationQueue:
                 logger.info(
                     "Failed to send event %s to %s", p.event_id, self._destination
                 )
-
-            self._start_catching_up()
         except Exception:
             logger.exception("TX [%s] Failed to send transaction", self._destination)
             for p in pending_pdus:
                 logger.info(
                     "Failed to send event %s to %s", p.event_id, self._destination
                 )
-
-            self._start_catching_up()
         finally:
             # We want to be *very* sure we clear this after we stop processing
             self.transmission_loop_running = False
@@ -440,8 +361,10 @@ class PerDestinationQueue:
 
         if first_catch_up_check:
             # first catchup so get last_successful_stream_ordering from database
-            self._last_successful_stream_ordering = await self._store.get_destination_last_successful_stream_ordering(
-                self._destination
+            self._last_successful_stream_ordering = (
+                await self._store.get_destination_last_successful_stream_ordering(
+                    self._destination
+                )
             )
 
         if self._last_successful_stream_ordering is None:
@@ -457,7 +380,8 @@ class PerDestinationQueue:
         # get at most 50 catchup room/PDUs
         while True:
             event_ids = await self._store.get_catch_up_room_event_ids(
-                self._destination, self._last_successful_stream_ordering,
+                self._destination,
+                self._last_successful_stream_ordering,
             )
 
             if not event_ids:
@@ -495,13 +419,10 @@ class PerDestinationQueue:
                 rooms = [p.room_id for p in catchup_pdus]
                 logger.info("Catching up rooms to %s: %r", self._destination, rooms)
 
-            success = await self._transaction_manager.send_new_transaction(
+            await self._transaction_manager.send_new_transaction(
                 self._destination, catchup_pdus, []
             )
 
-            if not success:
-                return
-
             sent_transactions_counter.inc()
             final_pdu = catchup_pdus[-1]
             self._last_successful_stream_ordering = cast(
@@ -580,3 +501,135 @@ class PerDestinationQueue:
         """
         self._catching_up = True
         self._pending_pdus = []
+
+
+@attr.s(slots=True)
+class _TransactionQueueManager:
+    """A helper async context manager for pulling stuff off the queues and
+    tracking what was last successfully sent, etc.
+    """
+
+    queue = attr.ib(type=PerDestinationQueue)
+
+    _device_stream_id = attr.ib(type=Optional[int], default=None)
+    _device_list_id = attr.ib(type=Optional[int], default=None)
+    _last_stream_ordering = attr.ib(type=Optional[int], default=None)
+    _pdus = attr.ib(type=List[EventBase], factory=list)
+
+    async def __aenter__(self) -> Tuple[List[EventBase], List[Edu]]:
+        # First we calculate the EDUs we want to send, if any.
+
+        # We start by fetching device related EDUs, i.e device updates and to
+        # device messages. We have to keep 2 free slots for presence and rr_edus.
+        limit = MAX_EDUS_PER_TRANSACTION - 2
+
+        device_update_edus, dev_list_id = await self.queue._get_device_update_edus(
+            limit
+        )
+
+        if device_update_edus:
+            self._device_list_id = dev_list_id
+        else:
+            self.queue._last_device_list_stream_id = dev_list_id
+
+        limit -= len(device_update_edus)
+
+        (
+            to_device_edus,
+            device_stream_id,
+        ) = await self.queue._get_to_device_message_edus(limit)
+
+        if to_device_edus:
+            self._device_stream_id = device_stream_id
+        else:
+            self.queue._last_device_stream_id = device_stream_id
+
+        pending_edus = device_update_edus + to_device_edus
+
+        # Now add the read receipt EDU.
+        pending_edus.extend(self.queue._get_rr_edus(force_flush=False))
+
+        # And presence EDU.
+        if self.queue._pending_presence:
+            pending_edus.append(
+                Edu(
+                    origin=self.queue._server_name,
+                    destination=self.queue._destination,
+                    edu_type="m.presence",
+                    content={
+                        "push": [
+                            format_user_presence_state(
+                                presence, self.queue._clock.time_msec()
+                            )
+                            for presence in self.queue._pending_presence.values()
+                        ]
+                    },
+                )
+            )
+            self.queue._pending_presence = {}
+
+        # Finally add any other types of EDUs if there is room.
+        pending_edus.extend(
+            self.queue._pop_pending_edus(MAX_EDUS_PER_TRANSACTION - len(pending_edus))
+        )
+        while (
+            len(pending_edus) < MAX_EDUS_PER_TRANSACTION
+            and self.queue._pending_edus_keyed
+        ):
+            _, val = self.queue._pending_edus_keyed.popitem()
+            pending_edus.append(val)
+
+        # Now we look for any PDUs to send, by getting up to 50 PDUs from the
+        # queue
+        self._pdus = self.queue._pending_pdus[:50]
+
+        if not self._pdus and not pending_edus:
+            return [], []
+
+        # if we've decided to send a transaction anyway, and we have room, we
+        # may as well send any pending RRs
+        if len(pending_edus) < MAX_EDUS_PER_TRANSACTION:
+            pending_edus.extend(self.queue._get_rr_edus(force_flush=True))
+
+        if self._pdus:
+            self._last_stream_ordering = self._pdus[
+                -1
+            ].internal_metadata.stream_ordering
+            assert self._last_stream_ordering
+
+        return self._pdus, pending_edus
+
+    async def __aexit__(self, exc_type, exc, tb):
+        if exc_type is not None:
+            # Failed to send transaction, so we bail out.
+            return
+
+        # Successfully sent transactions, so we remove pending PDUs from the queue
+        if self._pdus:
+            self.queue._pending_pdus = self.queue._pending_pdus[len(self._pdus) :]
+
+        # Succeeded to send the transaction so we record where we have sent up
+        # to in the various streams
+
+        if self._device_stream_id:
+            await self.queue._store.delete_device_msgs_for_remote(
+                self.queue._destination, self._device_stream_id
+            )
+            self.queue._last_device_stream_id = self._device_stream_id
+
+        # also mark the device updates as sent
+        if self._device_list_id:
+            logger.info(
+                "Marking as sent %r %r", self.queue._destination, self._device_list_id
+            )
+            await self.queue._store.mark_as_sent_devices_by_remote(
+                self.queue._destination, self._device_list_id
+            )
+            self.queue._last_device_list_stream_id = self._device_list_id
+
+        if self._last_stream_ordering:
+            # we sent some PDUs and it was successful, so update our
+            # last_successful_stream_ordering in the destinations table.
+            await self.queue._store.set_destination_last_successful_stream_ordering(
+                self.queue._destination, self._last_stream_ordering
+            )

synapse/federation/sender/transaction_manager.py

@@ -36,9 +36,9 @@ if TYPE_CHECKING:
 
 logger = logging.getLogger(__name__)
 
-last_pdu_age_metric = Gauge(
-    "synapse_federation_last_sent_pdu_age",
-    "The age (in seconds) of the last PDU successfully sent to the given domain",
+last_pdu_ts_metric = Gauge(
+    "synapse_federation_last_sent_pdu_time",
+    "The timestamp of the last PDU which was successfully sent to the given domain",
     labelnames=("server_name",),
 )
 
@@ -65,16 +65,16 @@ class TransactionManager:
 
     @measure_func("_send_new_transaction")
     async def send_new_transaction(
-        self, destination: str, pdus: List[EventBase], edus: List[Edu],
-    ) -> bool:
+        self,
+        destination: str,
+        pdus: List[EventBase],
+        edus: List[Edu],
+    ) -> None:
         """
         Args:
             destination: The destination to send to (e.g. 'example.org')
             pdus: In-order list of PDUs to send
             edus: List of EDUs to send
-
-        Returns:
-            True iff the transaction was successful
         """
 
         # Make a transaction-sending opentracing span. This span follows on from
@@ -93,8 +93,6 @@ class TransactionManager:
                 edu.strip_context()
 
         with start_active_span_follows_from("send_transaction", span_contexts):
-            success = True
-
             logger.debug("TX [%s] _attempt_new_transaction", destination)
 
             txn_id = str(self._next_txn_id)
@@ -149,45 +147,29 @@ class TransactionManager:
                 response = await self._transport_layer.send_transaction(
                     transaction, json_data_cb
                 )
-                code = 200
             except HttpResponseException as e:
                 code = e.code
                 response = e.response
 
-                if e.code in (401, 404, 429) or 500 <= e.code:
-                    logger.info(
-                        "TX [%s] {%s} got %d response", destination, txn_id, code
-                    )
-                    raise e
+                set_tag(tags.ERROR, True)
 
-            logger.info("TX [%s] {%s} got %d response", destination, txn_id, code)
+                logger.info("TX [%s] {%s} got %d response", destination, txn_id, code)
+                raise
 
-            if code == 200:
-                for e_id, r in response.get("pdus", {}).items():
-                    if "error" in r:
-                        logger.warning(
-                            "TX [%s] {%s} Remote returned error for %s: %s",
-                            destination,
-                            txn_id,
-                            e_id,
-                            r,
-                        )
-            else:
-                for p in pdus:
+            logger.info("TX [%s] {%s} got 200 response", destination, txn_id)
+
+            for e_id, r in response.get("pdus", {}).items():
+                if "error" in r:
                     logger.warning(
-                        "TX [%s] {%s} Failed to send event %s",
+                        "TX [%s] {%s} Remote returned error for %s: %s",
                         destination,
                         txn_id,
-                        p.event_id,
+                        e_id,
+                        r,
                     )
-                success = False
 
-            if success and pdus and destination in self._federation_metrics_domains:
+            if pdus and destination in self._federation_metrics_domains:
                 last_pdu = pdus[-1]
-                last_pdu_age = self.clock.time_msec() - last_pdu.origin_server_ts
-                last_pdu_age_metric.labels(server_name=destination).set(
-                    last_pdu_age / 1000
+                last_pdu_ts_metric.labels(server_name=destination).set(
+                    last_pdu.origin_server_ts / 1000
                 )
-
-            set_tag(tags.ERROR, not success)
-            return success

synapse/federation/transport/client.py

@@ -39,7 +39,7 @@ class TransportLayerClient:
 
     @log_function
     def get_room_state_ids(self, destination, room_id, event_id):
-        """ Requests all state for a given room from the given server at the
+        """Requests all state for a given room from the given server at the
         given event. Returns the state's event_id's
 
         Args:
@@ -63,7 +63,7 @@ class TransportLayerClient:
 
     @log_function
     def get_event(self, destination, event_id, timeout=None):
-        """ Requests the pdu with give id and origin from the given server.
+        """Requests the pdu with give id and origin from the given server.
 
         Args:
             destination (str): The host name of the remote homeserver we want
@@ -84,7 +84,7 @@ class TransportLayerClient:
 
     @log_function
     def backfill(self, destination, room_id, event_tuples, limit):
-        """ Requests `limit` previous PDUs in a given context before list of
+        """Requests `limit` previous PDUs in a given context before list of
         PDUs.
 
         Args:
@@ -118,7 +118,7 @@ class TransportLayerClient:
 
     @log_function
     async def send_transaction(self, transaction, json_data_callback=None):
-        """ Sends the given Transaction to its destination
+        """Sends the given Transaction to its destination
 
         Args:
             transaction (Transaction)
@@ -551,8 +551,7 @@ class TransportLayerClient:
 
     @log_function
     def get_group_profile(self, destination, group_id, requester_user_id):
-        """Get a group profile
-        """
+        """Get a group profile"""
         path = _create_v1_path("/groups/%s/profile", group_id)
 
         return self.client.get_json(
@@ -584,8 +583,7 @@ class TransportLayerClient:
 
     @log_function
     def get_group_summary(self, destination, group_id, requester_user_id):
-        """Get a group summary
-        """
+        """Get a group summary"""
         path = _create_v1_path("/groups/%s/summary", group_id)
 
         return self.client.get_json(
@@ -597,8 +595,7 @@ class TransportLayerClient:
 
     @log_function
     def get_rooms_in_group(self, destination, group_id, requester_user_id):
-        """Get all rooms in a group
-        """
+        """Get all rooms in a group"""
         path = _create_v1_path("/groups/%s/rooms", group_id)
 
         return self.client.get_json(
@@ -611,8 +608,7 @@ class TransportLayerClient:
     def add_room_to_group(
         self, destination, group_id, requester_user_id, room_id, content
     ):
-        """Add a room to a group
-        """
+        """Add a room to a group"""
         path = _create_v1_path("/groups/%s/room/%s", group_id, room_id)
 
         return self.client.post_json(
@@ -626,8 +622,7 @@ class TransportLayerClient:
     def update_room_in_group(
         self, destination, group_id, requester_user_id, room_id, config_key, content
     ):
-        """Update room in group
-        """
+        """Update room in group"""
         path = _create_v1_path(
             "/groups/%s/room/%s/config/%s", group_id, room_id, config_key
         )
@@ -641,8 +636,7 @@ class TransportLayerClient:
         )
 
     def remove_room_from_group(self, destination, group_id, requester_user_id, room_id):
-        """Remove a room from a group
-        """
+        """Remove a room from a group"""
         path = _create_v1_path("/groups/%s/room/%s", group_id, room_id)
 
         return self.client.delete_json(
@@ -654,8 +648,7 @@ class TransportLayerClient:
 
     @log_function
     def get_users_in_group(self, destination, group_id, requester_user_id):
-        """Get users in a group
-        """
+        """Get users in a group"""
         path = _create_v1_path("/groups/%s/users", group_id)
 
         return self.client.get_json(
@@ -667,8 +660,7 @@ class TransportLayerClient:
 
     @log_function
     def get_invited_users_in_group(self, destination, group_id, requester_user_id):
-        """Get users that have been invited to a group
-        """
+        """Get users that have been invited to a group"""
         path = _create_v1_path("/groups/%s/invited_users", group_id)
 
         return self.client.get_json(
@@ -680,8 +672,7 @@ class TransportLayerClient:
 
     @log_function
     def accept_group_invite(self, destination, group_id, user_id, content):
-        """Accept a group invite
-        """
+        """Accept a group invite"""
         path = _create_v1_path("/groups/%s/users/%s/accept_invite", group_id, user_id)
 
         return self.client.post_json(
@@ -690,8 +681,7 @@ class TransportLayerClient:
 
     @log_function
     def join_group(self, destination, group_id, user_id, content):
-        """Attempts to join a group
-        """
+        """Attempts to join a group"""
         path = _create_v1_path("/groups/%s/users/%s/join", group_id, user_id)
 
         return self.client.post_json(
@@ -702,8 +692,7 @@ class TransportLayerClient:
     def invite_to_group(
         self, destination, group_id, user_id, requester_user_id, content
     ):
-        """Invite a user to a group
-        """
+        """Invite a user to a group"""
         path = _create_v1_path("/groups/%s/users/%s/invite", group_id, user_id)
 
         return self.client.post_json(
@@ -730,8 +719,7 @@ class TransportLayerClient:
     def remove_user_from_group(
         self, destination, group_id, requester_user_id, user_id, content
     ):
-        """Remove a user from a group
-        """
+        """Remove a user from a group"""
         path = _create_v1_path("/groups/%s/users/%s/remove", group_id, user_id)
 
         return self.client.post_json(
@@ -772,8 +760,7 @@ class TransportLayerClient:
     def update_group_summary_room(
         self, destination, group_id, user_id, room_id, category_id, content
     ):
-        """Update a room entry in a group summary
-        """
+        """Update a room entry in a group summary"""
         if category_id:
             path = _create_v1_path(
                 "/groups/%s/summary/categories/%s/rooms/%s",
@@ -796,8 +783,7 @@ class TransportLayerClient:
     def delete_group_summary_room(
         self, destination, group_id, user_id, room_id, category_id
     ):
-        """Delete a room entry in a group summary
-        """
+        """Delete a room entry in a group summary"""
         if category_id:
             path = _create_v1_path(
                 "/groups/%s/summary/categories/%s/rooms/%s",
@@ -817,8 +803,7 @@ class TransportLayerClient:
 
     @log_function
     def get_group_categories(self, destination, group_id, requester_user_id):
-        """Get all categories in a group
-        """
+        """Get all categories in a group"""
         path = _create_v1_path("/groups/%s/categories", group_id)
 
         return self.client.get_json(
@@ -830,8 +815,7 @@ class TransportLayerClient:
 
     @log_function
     def get_group_category(self, destination, group_id, requester_user_id, category_id):
-        """Get category info in a group
-        """
+        """Get category info in a group"""
         path = _create_v1_path("/groups/%s/categories/%s", group_id, category_id)
 
         return self.client.get_json(
@@ -845,8 +829,7 @@ class TransportLayerClient:
     def update_group_category(
         self, destination, group_id, requester_user_id, category_id, content
     ):
-        """Update a category in a group
-        """
+        """Update a category in a group"""
         path = _create_v1_path("/groups/%s/categories/%s", group_id, category_id)
 
         return self.client.post_json(
@@ -861,8 +844,7 @@ class TransportLayerClient:
     def delete_group_category(
         self, destination, group_id, requester_user_id, category_id
     ):
-        """Delete a category in a group
-        """
+        """Delete a category in a group"""
         path = _create_v1_path("/groups/%s/categories/%s", group_id, category_id)
 
         return self.client.delete_json(
@@ -874,8 +856,7 @@ class TransportLayerClient:
 
     @log_function
     def get_group_roles(self, destination, group_id, requester_user_id):
-        """Get all roles in a group
-        """
+        """Get all roles in a group"""
         path = _create_v1_path("/groups/%s/roles", group_id)
 
         return self.client.get_json(
@@ -887,8 +868,7 @@ class TransportLayerClient:
 
     @log_function
     def get_group_role(self, destination, group_id, requester_user_id, role_id):
-        """Get a roles info
-        """
+        """Get a roles info"""
         path = _create_v1_path("/groups/%s/roles/%s", group_id, role_id)
 
         return self.client.get_json(
@@ -902,8 +882,7 @@ class TransportLayerClient:
     def update_group_role(
         self, destination, group_id, requester_user_id, role_id, content
     ):
-        """Update a role in a group
-        """
+        """Update a role in a group"""
         path = _create_v1_path("/groups/%s/roles/%s", group_id, role_id)
 
         return self.client.post_json(
@@ -916,8 +895,7 @@ class TransportLayerClient:
 
     @log_function
     def delete_group_role(self, destination, group_id, requester_user_id, role_id):
-        """Delete a role in a group
-        """
+        """Delete a role in a group"""
         path = _create_v1_path("/groups/%s/roles/%s", group_id, role_id)
 
         return self.client.delete_json(
@@ -931,8 +909,7 @@ class TransportLayerClient:
     def update_group_summary_user(
         self, destination, group_id, requester_user_id, user_id, role_id, content
     ):
-        """Update a users entry in a group
-        """
+        """Update a users entry in a group"""
         if role_id:
             path = _create_v1_path(
                 "/groups/%s/summary/roles/%s/users/%s", group_id, role_id, user_id
@@ -950,8 +927,7 @@ class TransportLayerClient:
 
     @log_function
     def set_group_join_policy(self, destination, group_id, requester_user_id, content):
-        """Sets the join policy for a group
-        """
+        """Sets the join policy for a group"""
         path = _create_v1_path("/groups/%s/settings/m.join_policy", group_id)
 
         return self.client.put_json(
@@ -966,8 +942,7 @@ class TransportLayerClient:
     def delete_group_summary_user(
         self, destination, group_id, requester_user_id, user_id, role_id
     ):
-        """Delete a users entry in a group
-        """
+        """Delete a users entry in a group"""
         if role_id:
             path = _create_v1_path(
                 "/groups/%s/summary/roles/%s/users/%s", group_id, role_id, user_id
@@ -983,8 +958,7 @@ class TransportLayerClient:
         )
 
     def bulk_get_publicised_groups(self, destination, user_ids):
-        """Get the groups a list of users are publicising
-        """
+        """Get the groups a list of users are publicising"""
 
         path = _create_v1_path("/get_groups_publicised")
 

synapse/federation/transport/server.py

@@ -21,6 +21,7 @@ import re
 from typing import Optional, Tuple, Type
 
 import synapse
+from synapse.api.constants import MAX_GROUP_CATEGORYID_LENGTH, MAX_GROUP_ROLEID_LENGTH
 from synapse.api.errors import Codes, FederationDeniedError, SynapseError
 from synapse.api.room_versions import RoomVersions
 from synapse.api.urls import (
@@ -364,7 +365,10 @@ class BaseFederationServlet:
                 continue
 
             server.register_paths(
-                method, (pattern,), self._wrap(code), self.__class__.__name__,
+                method,
+                (pattern,),
+                self._wrap(code),
+                self.__class__.__name__,
             )
 
 
@@ -381,7 +385,7 @@ class FederationSendServlet(BaseFederationServlet):
 
     # This is when someone is trying to send us a bunch of data.
     async def on_PUT(self, origin, content, query, transaction_id):
-        """ Called on PUT /send/<transaction_id>/
+        """Called on PUT /send/<transaction_id>/
 
         Args:
             request (twisted.web.http.Request): The HTTP request.
@@ -480,10 +484,9 @@ class FederationQueryServlet(BaseFederationServlet):
 
     # This is when we receive a server-server Query
     async def on_GET(self, origin, content, query, query_type):
-        return await self.handler.on_query_request(
-            query_type,
-            {k.decode("utf8"): v[0].decode("utf-8") for k, v in query.items()},
-        )
+        args = {k.decode("utf8"): v[0].decode("utf-8") for k, v in query.items()}
+        args["origin"] = origin
+        return await self.handler.on_query_request(query_type, args)
 
 
 class FederationMakeJoinServlet(BaseFederationServlet):
@@ -855,8 +858,7 @@ class FederationVersionServlet(BaseFederationServlet):
 
 
 class FederationGroupsProfileServlet(BaseFederationServlet):
-    """Get/set the basic profile of a group on behalf of a user
-    """
+    """Get/set the basic profile of a group on behalf of a user"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/profile"
 
@@ -895,8 +897,7 @@ class FederationGroupsSummaryServlet(BaseFederationServlet):
 
 
 class FederationGroupsRoomsServlet(BaseFederationServlet):
-    """Get the rooms in a group on behalf of a user
-    """
+    """Get the rooms in a group on behalf of a user"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/rooms"
 
@@ -911,8 +912,7 @@ class FederationGroupsRoomsServlet(BaseFederationServlet):
 
 
 class FederationGroupsAddRoomsServlet(BaseFederationServlet):
-    """Add/remove room from group
-    """
+    """Add/remove room from group"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/room/(?P<room_id>[^/]*)"
 
@@ -940,8 +940,7 @@ class FederationGroupsAddRoomsServlet(BaseFederationServlet):
 
 
 class FederationGroupsAddRoomsConfigServlet(BaseFederationServlet):
-    """Update room config in group
-    """
+    """Update room config in group"""
 
     PATH = (
         "/groups/(?P<group_id>[^/]*)/room/(?P<room_id>[^/]*)"
@@ -961,8 +960,7 @@ class FederationGroupsAddRoomsConfigServlet(BaseFederationServlet):
 
 
 class FederationGroupsUsersServlet(BaseFederationServlet):
-    """Get the users in a group on behalf of a user
-    """
+    """Get the users in a group on behalf of a user"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/users"
 
@@ -977,8 +975,7 @@ class FederationGroupsUsersServlet(BaseFederationServlet):
 
 
 class FederationGroupsInvitedUsersServlet(BaseFederationServlet):
-    """Get the users that have been invited to a group
-    """
+    """Get the users that have been invited to a group"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/invited_users"
 
@@ -995,8 +992,7 @@ class FederationGroupsInvitedUsersServlet(BaseFederationServlet):
 
 
 class FederationGroupsInviteServlet(BaseFederationServlet):
-    """Ask a group server to invite someone to the group
-    """
+    """Ask a group server to invite someone to the group"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/users/(?P<user_id>[^/]*)/invite"
 
@@ -1013,8 +1009,7 @@ class FederationGroupsInviteServlet(BaseFederationServlet):
 
 
 class FederationGroupsAcceptInviteServlet(BaseFederationServlet):
-    """Accept an invitation from the group server
-    """
+    """Accept an invitation from the group server"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/users/(?P<user_id>[^/]*)/accept_invite"
 
@@ -1028,8 +1023,7 @@ class FederationGroupsAcceptInviteServlet(BaseFederationServlet):
 
 
 class FederationGroupsJoinServlet(BaseFederationServlet):
-    """Attempt to join a group
-    """
+    """Attempt to join a group"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/users/(?P<user_id>[^/]*)/join"
 
@@ -1043,8 +1037,7 @@ class FederationGroupsJoinServlet(BaseFederationServlet):
 
 
 class FederationGroupsRemoveUserServlet(BaseFederationServlet):
-    """Leave or kick a user from the group
-    """
+    """Leave or kick a user from the group"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/users/(?P<user_id>[^/]*)/remove"
 
@@ -1061,8 +1054,7 @@ class FederationGroupsRemoveUserServlet(BaseFederationServlet):
 
 
 class FederationGroupsLocalInviteServlet(BaseFederationServlet):
-    """A group server has invited a local user
-    """
+    """A group server has invited a local user"""
 
     PATH = "/groups/local/(?P<group_id>[^/]*)/users/(?P<user_id>[^/]*)/invite"
 
@@ -1076,8 +1068,7 @@ class FederationGroupsLocalInviteServlet(BaseFederationServlet):
 
 
 class FederationGroupsRemoveLocalUserServlet(BaseFederationServlet):
-    """A group server has removed a local user
-    """
+    """A group server has removed a local user"""
 
     PATH = "/groups/local/(?P<group_id>[^/]*)/users/(?P<user_id>[^/]*)/remove"
 
@@ -1093,8 +1084,7 @@ class FederationGroupsRemoveLocalUserServlet(BaseFederationServlet):
 
 
 class FederationGroupsRenewAttestaionServlet(BaseFederationServlet):
-    """A group or user's server renews their attestation
-    """
+    """A group or user's server renews their attestation"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/renew_attestation/(?P<user_id>[^/]*)"
 
@@ -1128,7 +1118,17 @@ class FederationGroupsSummaryRoomsServlet(BaseFederationServlet):
             raise SynapseError(403, "requester_user_id doesn't match origin")
 
         if category_id == "":
-            raise SynapseError(400, "category_id cannot be empty string")
+            raise SynapseError(
+                400, "category_id cannot be empty string", Codes.INVALID_PARAM
+            )
+
+        if len(category_id) > MAX_GROUP_CATEGORYID_LENGTH:
+            raise SynapseError(
+                400,
+                "category_id may not be longer than %s characters"
+                % (MAX_GROUP_CATEGORYID_LENGTH,),
+                Codes.INVALID_PARAM,
+            )
 
         resp = await self.handler.update_group_summary_room(
             group_id,
@@ -1156,8 +1156,7 @@ class FederationGroupsSummaryRoomsServlet(BaseFederationServlet):
 
 
 class FederationGroupsCategoriesServlet(BaseFederationServlet):
-    """Get all categories for a group
-    """
+    """Get all categories for a group"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/categories/?"
 
@@ -1172,8 +1171,7 @@ class FederationGroupsCategoriesServlet(BaseFederationServlet):
 
 
 class FederationGroupsCategoryServlet(BaseFederationServlet):
-    """Add/remove/get a category in a group
-    """
+    """Add/remove/get a category in a group"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/categories/(?P<category_id>[^/]+)"
 
@@ -1196,6 +1194,14 @@ class FederationGroupsCategoryServlet(BaseFederationServlet):
         if category_id == "":
             raise SynapseError(400, "category_id cannot be empty string")
 
+        if len(category_id) > MAX_GROUP_CATEGORYID_LENGTH:
+            raise SynapseError(
+                400,
+                "category_id may not be longer than %s characters"
+                % (MAX_GROUP_CATEGORYID_LENGTH,),
+                Codes.INVALID_PARAM,
+            )
+
         resp = await self.handler.upsert_group_category(
             group_id, requester_user_id, category_id, content
         )
@@ -1218,8 +1224,7 @@ class FederationGroupsCategoryServlet(BaseFederationServlet):
 
 
 class FederationGroupsRolesServlet(BaseFederationServlet):
-    """Get roles in a group
-    """
+    """Get roles in a group"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/roles/?"
 
@@ -1234,8 +1239,7 @@ class FederationGroupsRolesServlet(BaseFederationServlet):
 
 
 class FederationGroupsRoleServlet(BaseFederationServlet):
-    """Add/remove/get a role in a group
-    """
+    """Add/remove/get a role in a group"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/roles/(?P<role_id>[^/]+)"
 
@@ -1254,7 +1258,17 @@ class FederationGroupsRoleServlet(BaseFederationServlet):
             raise SynapseError(403, "requester_user_id doesn't match origin")
 
         if role_id == "":
-            raise SynapseError(400, "role_id cannot be empty string")
+            raise SynapseError(
+                400, "role_id cannot be empty string", Codes.INVALID_PARAM
+            )
+
+        if len(role_id) > MAX_GROUP_ROLEID_LENGTH:
+            raise SynapseError(
+                400,
+                "role_id may not be longer than %s characters"
+                % (MAX_GROUP_ROLEID_LENGTH,),
+                Codes.INVALID_PARAM,
+            )
 
         resp = await self.handler.update_group_role(
             group_id, requester_user_id, role_id, content
@@ -1299,6 +1313,14 @@ class FederationGroupsSummaryUsersServlet(BaseFederationServlet):
         if role_id == "":
             raise SynapseError(400, "role_id cannot be empty string")
 
+        if len(role_id) > MAX_GROUP_ROLEID_LENGTH:
+            raise SynapseError(
+                400,
+                "role_id may not be longer than %s characters"
+                % (MAX_GROUP_ROLEID_LENGTH,),
+                Codes.INVALID_PARAM,
+            )
+
         resp = await self.handler.update_group_summary_user(
             group_id,
             requester_user_id,
@@ -1325,8 +1347,7 @@ class FederationGroupsSummaryUsersServlet(BaseFederationServlet):
 
 
 class FederationGroupsBulkPublicisedServlet(BaseFederationServlet):
-    """Get roles in a group
-    """
+    """Get roles in a group"""
 
     PATH = "/get_groups_publicised"
 
@@ -1339,8 +1360,7 @@ class FederationGroupsBulkPublicisedServlet(BaseFederationServlet):
 
 
 class FederationGroupsSettingJoinPolicyServlet(BaseFederationServlet):
-    """Sets whether a group is joinable without an invite or knock
-    """
+    """Sets whether a group is joinable without an invite or knock"""
 
     PATH = "/groups/(?P<group_id>[^/]*)/settings/m.join_policy"
 

synapse/federation/units.py

@@ -29,7 +29,7 @@ logger = logging.getLogger(__name__)
 
 @attr.s(slots=True)
 class Edu(JsonEncodedObject):
-    """ An Edu represents a piece of data sent from one homeserver to another.
+    """An Edu represents a piece of data sent from one homeserver to another.
 
     In comparison to Pdus, Edus are not persisted for a long time on disk, are
     not meaningful beyond a given pair of homeservers, and don't have an
@@ -63,7 +63,7 @@ class Edu(JsonEncodedObject):
 
 
 class Transaction(JsonEncodedObject):
-    """ A transaction is a list of Pdus and Edus to be sent to a remote home
+    """A transaction is a list of Pdus and Edus to be sent to a remote home
     server with some extra metadata.
 
     Example transaction::
@@ -99,7 +99,7 @@ class Transaction(JsonEncodedObject):
     ]
 
     def __init__(self, transaction_id=None, pdus=[], **kwargs):
-        """ If we include a list of pdus then we decode then as PDU's
+        """If we include a list of pdus then we decode then as PDU's
         automatically.
         """
 
@@ -111,7 +111,7 @@ class Transaction(JsonEncodedObject):
 
     @staticmethod
     def create_new(pdus, **kwargs):
-        """ Used to create a new transaction. Will auto fill out
+        """Used to create a new transaction. Will auto fill out
         transaction_id and origin_server_ts keys.
         """
         if "origin_server_ts" not in kwargs:

synapse/groups/attestations.py

@@ -37,13 +37,16 @@ An attestation is a signed blob of json that looks like:
 
 import logging
 import random
-from typing import Tuple
+from typing import TYPE_CHECKING, Optional, Tuple
 
 from signedjson.sign import sign_json
 
 from synapse.api.errors import HttpResponseException, RequestSendFailed, SynapseError
 from synapse.metrics.background_process_metrics import run_as_background_process
-from synapse.types import get_domain_from_id
+from synapse.types import JsonDict, get_domain_from_id
+
+if TYPE_CHECKING:
+    from synapse.app.homeserver import HomeServer
 
 logger = logging.getLogger(__name__)
 
@@ -61,18 +64,21 @@ UPDATE_ATTESTATION_TIME_MS = 1 * 24 * 60 * 60 * 1000
 
 
 class GroupAttestationSigning:
-    """Creates and verifies group attestations.
-    """
+    """Creates and verifies group attestations."""
 
-    def __init__(self, hs):
+    def __init__(self, hs: "HomeServer"):
         self.keyring = hs.get_keyring()
         self.clock = hs.get_clock()
         self.server_name = hs.hostname
         self.signing_key = hs.signing_key
 
     async def verify_attestation(
-        self, attestation, group_id, user_id, server_name=None
-    ):
+        self,
+        attestation: JsonDict,
+        group_id: str,
+        user_id: str,
+        server_name: Optional[str] = None,
+    ) -> None:
         """Verifies that the given attestation matches the given parameters.
 
         An optional server_name can be supplied to explicitly set which server's
@@ -101,16 +107,18 @@ class GroupAttestationSigning:
         if valid_until_ms < now:
             raise SynapseError(400, "Attestation expired")
 
+        assert server_name is not None
         await self.keyring.verify_json_for_server(
             server_name, attestation, now, "Group attestation"
         )
 
-    def create_attestation(self, group_id, user_id):
+    def create_attestation(self, group_id: str, user_id: str) -> JsonDict:
         """Create an attestation for the group_id and user_id with default
         validity length.
         """
-        validity_period = DEFAULT_ATTESTATION_LENGTH_MS
-        validity_period *= random.uniform(*DEFAULT_ATTESTATION_JITTER)
+        validity_period = DEFAULT_ATTESTATION_LENGTH_MS * random.uniform(
+            *DEFAULT_ATTESTATION_JITTER
+        )
         valid_until_ms = int(self.clock.time_msec() + validity_period)
 
         return sign_json(
@@ -125,10 +133,9 @@ class GroupAttestationSigning:
 
 
 class GroupAttestionRenewer:
-    """Responsible for sending and receiving attestation updates.
-    """
+    """Responsible for sending and receiving attestation updates."""
 
-    def __init__(self, hs):
+    def __init__(self, hs: "HomeServer"):
         self.clock = hs.get_clock()
         self.store = hs.get_datastore()
         self.assestations = hs.get_groups_attestation_signing()
@@ -141,9 +148,10 @@ class GroupAttestionRenewer:
                 self._start_renew_attestations, 30 * 60 * 1000
             )
 
-    async def on_renew_attestation(self, group_id, user_id, content):
-        """When a remote updates an attestation
-        """
+    async def on_renew_attestation(
+        self, group_id: str, user_id: str, content: JsonDict
+    ) -> JsonDict:
+        """When a remote updates an attestation"""
         attestation = content["attestation"]
 
         if not self.is_mine_id(group_id) and not self.is_mine_id(user_id):
@@ -157,12 +165,11 @@ class GroupAttestionRenewer:
 
         return {}
 
-    def _start_renew_attestations(self):
+    def _start_renew_attestations(self) -> None:
         return run_as_background_process("renew_attestations", self._renew_attestations)
 
-    async def _renew_attestations(self):
-        """Called periodically to check if we need to update any of our attestations
-        """
+    async def _renew_attestations(self) -> None:
+        """Called periodically to check if we need to update any of our attestations"""
 
         now = self.clock.time_msec()
 
@@ -170,7 +177,7 @@ class GroupAttestionRenewer:
             now + UPDATE_ATTESTATION_TIME_MS
         )
 
-        async def _renew_attestation(group_user: Tuple[str, str]):
+        async def _renew_attestation(group_user: Tuple[str, str]) -> None:
             group_id, user_id = group_user
             try:
                 if not self.is_mine_id(group_id):

synapse/groups/groups_server.py

@@ -16,11 +16,17 @@
 # limitations under the License.
 
 import logging
+from typing import TYPE_CHECKING, Optional
 
 from synapse.api.errors import Codes, SynapseError
-from synapse.types import GroupID, RoomID, UserID, get_domain_from_id
+from synapse.handlers.groups_local import GroupsLocalHandler
+from synapse.handlers.profile import MAX_AVATAR_URL_LEN, MAX_DISPLAYNAME_LEN
+from synapse.types import GroupID, JsonDict, RoomID, UserID, get_domain_from_id
 from synapse.util.async_helpers import concurrently_execute
 
+if TYPE_CHECKING:
+    from synapse.app.homeserver import HomeServer
+
 logger = logging.getLogger(__name__)
 
 
@@ -32,8 +38,13 @@ logger = logging.getLogger(__name__)
 # TODO: Flairs
 
 
+# Note that the maximum lengths are somewhat arbitrary.
+MAX_SHORT_DESC_LEN = 1000
+MAX_LONG_DESC_LEN = 10000
+
+
 class GroupsServerWorkerHandler:
-    def __init__(self, hs):
+    def __init__(self, hs: "HomeServer"):
         self.hs = hs
         self.store = hs.get_datastore()
         self.room_list_handler = hs.get_room_list_handler()
@@ -48,16 +59,21 @@ class GroupsServerWorkerHandler:
         self.profile_handler = hs.get_profile_handler()
 
     async def check_group_is_ours(
-        self, group_id, requester_user_id, and_exists=False, and_is_admin=None
-    ):
+        self,
+        group_id: str,
+        requester_user_id: str,
+        and_exists: bool = False,
+        and_is_admin: Optional[str] = None,
+    ) -> Optional[dict]:
         """Check that the group is ours, and optionally if it exists.
 
         If group does exist then return group.
 
         Args:
-            group_id (str)
-            and_exists (bool): whether to also check if group exists
-            and_is_admin (str): whether to also check if given str is a user_id
+            group_id: The group ID to check.
+            requester_user_id: The user ID of the requester.
+            and_exists: whether to also check if group exists
+            and_is_admin: whether to also check if given str is a user_id
                 that is an admin
         """
         if not self.is_mine_id(group_id):
@@ -80,7 +96,9 @@ class GroupsServerWorkerHandler:
 
         return group
 
-    async def get_group_summary(self, group_id, requester_user_id):
+    async def get_group_summary(
+        self, group_id: str, requester_user_id: str
+    ) -> JsonDict:
         """Get the summary for a group as seen by requester_user_id.
 
         The group summary consists of the profile of the room, and a curated
@@ -113,6 +131,8 @@ class GroupsServerWorkerHandler:
             entry = await self.room_list_handler.generate_room_entry(
                 room_id, len(joined_users), with_alias=False, allow_private=True
             )
+            if entry is None:
+                continue
             entry = dict(entry)  # so we don't change what's cached
             entry.pop("room_id", None)
 
@@ -120,22 +140,22 @@ class GroupsServerWorkerHandler:
 
         rooms.sort(key=lambda e: e.get("order", 0))
 
-        for entry in users:
-            user_id = entry["user_id"]
+        for user in users:
+            user_id = user["user_id"]
 
             if not self.is_mine_id(requester_user_id):
                 attestation = await self.store.get_remote_attestation(group_id, user_id)
                 if not attestation:
                     continue
 
-                entry["attestation"] = attestation
+                user["attestation"] = attestation
             else:
-                entry["attestation"] = self.attestations.create_attestation(
+                user["attestation"] = self.attestations.create_attestation(
                     group_id, user_id
                 )
 
             user_profile = await self.profile_handler.get_profile_from_cache(user_id)
-            entry.update(user_profile)
+            user.update(user_profile)
 
         users.sort(key=lambda e: e.get("order", 0))
 
@@ -158,46 +178,44 @@ class GroupsServerWorkerHandler:
             "user": membership_info,
         }
 
-    async def get_group_categories(self, group_id, requester_user_id):
-        """Get all categories in a group (as seen by user)
-        """
+    async def get_group_categories(
+        self, group_id: str, requester_user_id: str
+    ) -> JsonDict:
+        """Get all categories in a group (as seen by user)"""
         await self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
 
         categories = await self.store.get_group_categories(group_id=group_id)
         return {"categories": categories}
 
-    async def get_group_category(self, group_id, requester_user_id, category_id):
-        """Get a specific category in a group (as seen by user)
-        """
+    async def get_group_category(
+        self, group_id: str, requester_user_id: str, category_id: str
+    ) -> JsonDict:
+        """Get a specific category in a group (as seen by user)"""
         await self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
 
-        res = await self.store.get_group_category(
+        return await self.store.get_group_category(
             group_id=group_id, category_id=category_id
         )
 
-        logger.info("group %s", res)
-
-        return res
-
-    async def get_group_roles(self, group_id, requester_user_id):
-        """Get all roles in a group (as seen by user)
-        """
+    async def get_group_roles(self, group_id: str, requester_user_id: str) -> JsonDict:
+        """Get all roles in a group (as seen by user)"""
         await self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
 
         roles = await self.store.get_group_roles(group_id=group_id)
         return {"roles": roles}
 
-    async def get_group_role(self, group_id, requester_user_id, role_id):
-        """Get a specific role in a group (as seen by user)
-        """
+    async def get_group_role(
+        self, group_id: str, requester_user_id: str, role_id: str
+    ) -> JsonDict:
+        """Get a specific role in a group (as seen by user)"""
         await self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
 
-        res = await self.store.get_group_role(group_id=group_id, role_id=role_id)
-        return res
+        return await self.store.get_group_role(group_id=group_id, role_id=role_id)
 
-    async def get_group_profile(self, group_id, requester_user_id):
-        """Get the group profile as seen by requester_user_id
-        """
+    async def get_group_profile(
+        self, group_id: str, requester_user_id: str
+    ) -> JsonDict:
+        """Get the group profile as seen by requester_user_id"""
 
         await self.check_group_is_ours(group_id, requester_user_id)
 
@@ -218,7 +236,9 @@ class GroupsServerWorkerHandler:
         else:
             raise SynapseError(404, "Unknown group")
 
-    async def get_users_in_group(self, group_id, requester_user_id):
+    async def get_users_in_group(
+        self, group_id: str, requester_user_id: str
+    ) -> JsonDict:
         """Get the users in group as seen by requester_user_id.
 
         The ordering is arbitrary at the moment
@@ -267,7 +287,9 @@ class GroupsServerWorkerHandler:
 
         return {"chunk": chunk, "total_user_count_estimate": len(user_results)}
 
-    async def get_invited_users_in_group(self, group_id, requester_user_id):
+    async def get_invited_users_in_group(
+        self, group_id: str, requester_user_id: str
+    ) -> JsonDict:
         """Get the users that have been invited to a group as seen by requester_user_id.
 
         The ordering is arbitrary at the moment
@@ -297,7 +319,9 @@ class GroupsServerWorkerHandler:
 
         return {"chunk": user_profiles, "total_user_count_estimate": len(invited_users)}
 
-    async def get_rooms_in_group(self, group_id, requester_user_id):
+    async def get_rooms_in_group(
+        self, group_id: str, requester_user_id: str
+    ) -> JsonDict:
         """Get the rooms in group as seen by requester_user_id
 
         This returns rooms in order of decreasing number of joined users
@@ -335,17 +359,21 @@ class GroupsServerWorkerHandler:
 
 
 class GroupsServerHandler(GroupsServerWorkerHandler):
-    def __init__(self, hs):
+    def __init__(self, hs: "HomeServer"):
         super().__init__(hs)
 
         # Ensure attestations get renewed
         hs.get_groups_attestation_renewer()
 
     async def update_group_summary_room(
-        self, group_id, requester_user_id, room_id, category_id, content
-    ):
-        """Add/update a room to the group summary
-        """
+        self,
+        group_id: str,
+        requester_user_id: str,
+        room_id: str,
+        category_id: str,
+        content: JsonDict,
+    ) -> JsonDict:
+        """Add/update a room to the group summary"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
@@ -367,10 +395,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         return {}
 
     async def delete_group_summary_room(
-        self, group_id, requester_user_id, room_id, category_id
-    ):
-        """Remove a room from the summary
-        """
+        self, group_id: str, requester_user_id: str, room_id: str, category_id: str
+    ) -> JsonDict:
+        """Remove a room from the summary"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
@@ -381,7 +408,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {}
 
-    async def set_group_join_policy(self, group_id, requester_user_id, content):
+    async def set_group_join_policy(
+        self, group_id: str, requester_user_id: str, content: JsonDict
+    ) -> JsonDict:
         """Sets the group join policy.
 
         Currently supported policies are:
@@ -401,10 +430,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         return {}
 
     async def update_group_category(
-        self, group_id, requester_user_id, category_id, content
-    ):
-        """Add/Update a group category
-        """
+        self, group_id: str, requester_user_id: str, category_id: str, content: JsonDict
+    ) -> JsonDict:
+        """Add/Update a group category"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
@@ -421,9 +449,10 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {}
 
-    async def delete_group_category(self, group_id, requester_user_id, category_id):
-        """Delete a group category
-        """
+    async def delete_group_category(
+        self, group_id: str, requester_user_id: str, category_id: str
+    ) -> JsonDict:
+        """Delete a group category"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
@@ -434,9 +463,10 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {}
 
-    async def update_group_role(self, group_id, requester_user_id, role_id, content):
-        """Add/update a role in a group
-        """
+    async def update_group_role(
+        self, group_id: str, requester_user_id: str, role_id: str, content: JsonDict
+    ) -> JsonDict:
+        """Add/update a role in a group"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
@@ -451,9 +481,10 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {}
 
-    async def delete_group_role(self, group_id, requester_user_id, role_id):
-        """Remove role from group
-        """
+    async def delete_group_role(
+        self, group_id: str, requester_user_id: str, role_id: str
+    ) -> JsonDict:
+        """Remove role from group"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
@@ -463,10 +494,14 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         return {}
 
     async def update_group_summary_user(
-        self, group_id, requester_user_id, user_id, role_id, content
-    ):
-        """Add/update a users entry in the group summary
-        """
+        self,
+        group_id: str,
+        requester_user_id: str,
+        user_id: str,
+        role_id: str,
+        content: JsonDict,
+    ) -> JsonDict:
+        """Add/update a users entry in the group summary"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
@@ -486,10 +521,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         return {}
 
     async def delete_group_summary_user(
-        self, group_id, requester_user_id, user_id, role_id
-    ):
-        """Remove a user from the group summary
-        """
+        self, group_id: str, requester_user_id: str, user_id: str, role_id: str
+    ) -> JsonDict:
+        """Remove a user from the group summary"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
@@ -500,26 +534,43 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {}
 
-    async def update_group_profile(self, group_id, requester_user_id, content):
-        """Update the group profile
-        """
+    async def update_group_profile(
+        self, group_id: str, requester_user_id: str, content: JsonDict
+    ) -> None:
+        """Update the group profile"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
 
         profile = {}
-        for keyname in ("name", "avatar_url", "short_description", "long_description"):
+        for keyname, max_length in (
+            ("name", MAX_DISPLAYNAME_LEN),
+            ("avatar_url", MAX_AVATAR_URL_LEN),
+            ("short_description", MAX_SHORT_DESC_LEN),
+            ("long_description", MAX_LONG_DESC_LEN),
+        ):
             if keyname in content:
                 value = content[keyname]
                 if not isinstance(value, str):
-                    raise SynapseError(400, "%r value is not a string" % (keyname,))
+                    raise SynapseError(
+                        400,
+                        "%r value is not a string" % (keyname,),
+                        errcode=Codes.INVALID_PARAM,
+                    )
+                if len(value) > max_length:
+                    raise SynapseError(
+                        400,
+                        "Invalid %s parameter" % (keyname,),
+                        errcode=Codes.INVALID_PARAM,
+                    )
                 profile[keyname] = value
 
         await self.store.update_group_profile(group_id, profile)
 
-    async def add_room_to_group(self, group_id, requester_user_id, room_id, content):
-        """Add room to group
-        """
+    async def add_room_to_group(
+        self, group_id: str, requester_user_id: str, room_id: str, content: JsonDict
+    ) -> JsonDict:
+        """Add room to group"""
         RoomID.from_string(room_id)  # Ensure valid room id
 
         await self.check_group_is_ours(
@@ -533,10 +584,14 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         return {}
 
     async def update_room_in_group(
-        self, group_id, requester_user_id, room_id, config_key, content
-    ):
-        """Update room in group
-        """
+        self,
+        group_id: str,
+        requester_user_id: str,
+        room_id: str,
+        config_key: str,
+        content: JsonDict,
+    ) -> JsonDict:
+        """Update room in group"""
         RoomID.from_string(room_id)  # Ensure valid room id
 
         await self.check_group_is_ours(
@@ -554,9 +609,10 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {}
 
-    async def remove_room_from_group(self, group_id, requester_user_id, room_id):
-        """Remove room from group
-        """
+    async def remove_room_from_group(
+        self, group_id: str, requester_user_id: str, room_id: str
+    ) -> JsonDict:
+        """Remove room from group"""
         await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
@@ -565,13 +621,16 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {}
 
-    async def invite_to_group(self, group_id, user_id, requester_user_id, content):
-        """Invite user to group
-        """
+    async def invite_to_group(
+        self, group_id: str, user_id: str, requester_user_id: str, content: JsonDict
+    ) -> JsonDict:
+        """Invite user to group"""
 
         group = await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True, and_is_admin=requester_user_id
         )
+        if not group:
+            raise SynapseError(400, "Group does not exist", errcode=Codes.BAD_STATE)
 
         # TODO: Check if user knocked
 
@@ -594,6 +653,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         if self.hs.is_mine_id(user_id):
             groups_local = self.hs.get_groups_local_handler()
+            assert isinstance(
+                groups_local, GroupsLocalHandler
+            ), "Workers cannot invites users to groups."
             res = await groups_local.on_invite(group_id, user_id, content)
             local_attestation = None
         else:
@@ -629,6 +691,7 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
                 local_attestation=local_attestation,
                 remote_attestation=remote_attestation,
             )
+            return {"state": "join"}
         elif res["state"] == "invite":
             await self.store.add_group_invite(group_id, user_id)
             return {"state": "invite"}
@@ -637,13 +700,17 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         else:
             raise SynapseError(502, "Unknown state returned by HS")
 
-    async def _add_user(self, group_id, user_id, content):
+    async def _add_user(
+        self, group_id: str, user_id: str, content: JsonDict
+    ) -> Optional[JsonDict]:
         """Add a user to a group based on a content dict.
 
         See accept_invite, join_group.
         """
         if not self.hs.is_mine_id(user_id):
-            local_attestation = self.attestations.create_attestation(group_id, user_id)
+            local_attestation = self.attestations.create_attestation(
+                group_id, user_id
+            )  # type: Optional[JsonDict]
 
             remote_attestation = content["attestation"]
 
@@ -667,7 +734,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return local_attestation
 
-    async def accept_invite(self, group_id, requester_user_id, content):
+    async def accept_invite(
+        self, group_id: str, requester_user_id: str, content: JsonDict
+    ) -> JsonDict:
         """User tries to accept an invite to the group.
 
         This is different from them asking to join, and so should error if no
@@ -686,7 +755,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {"state": "join", "attestation": local_attestation}
 
-    async def join_group(self, group_id, requester_user_id, content):
+    async def join_group(
+        self, group_id: str, requester_user_id: str, content: JsonDict
+    ) -> JsonDict:
         """User tries to join the group.
 
         This will error if the group requires an invite/knock to join
@@ -695,6 +766,8 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         group_info = await self.check_group_is_ours(
             group_id, requester_user_id, and_exists=True
         )
+        if not group_info:
+            raise SynapseError(404, "Group does not exist", errcode=Codes.NOT_FOUND)
         if group_info["join_policy"] != "open":
             raise SynapseError(403, "Group is not publicly joinable")
 
@@ -702,26 +775,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {"state": "join", "attestation": local_attestation}
 
-    async def knock(self, group_id, requester_user_id, content):
-        """A user requests becoming a member of the group
-        """
-        await self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
-
-        raise NotImplementedError()
-
-    async def accept_knock(self, group_id, requester_user_id, content):
-        """Accept a users knock to the room.
-
-        Errors if the user hasn't knocked, rather than inviting them.
-        """
-
-        await self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
-
-        raise NotImplementedError()
-
     async def remove_user_from_group(
-        self, group_id, user_id, requester_user_id, content
-    ):
+        self, group_id: str, user_id: str, requester_user_id: str, content: JsonDict
+    ) -> JsonDict:
         """Remove a user from the group; either a user is leaving or an admin
         kicked them.
         """
@@ -743,6 +799,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         if is_kick:
             if self.hs.is_mine_id(user_id):
                 groups_local = self.hs.get_groups_local_handler()
+                assert isinstance(
+                    groups_local, GroupsLocalHandler
+                ), "Workers cannot remove users from groups."
                 await groups_local.user_removed_from_group(group_id, user_id, {})
             else:
                 await self.transport_client.remove_user_from_group_notification(
@@ -759,14 +818,15 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {}
 
-    async def create_group(self, group_id, requester_user_id, content):
-        group = await self.check_group_is_ours(group_id, requester_user_id)
-
+    async def create_group(
+        self, group_id: str, requester_user_id: str, content: JsonDict
+    ) -> JsonDict:
         logger.info("Attempting to create group with ID: %r", group_id)
 
         # parsing the id into a GroupID validates it.
         group_id_obj = GroupID.from_string(group_id)
 
+        group = await self.check_group_is_ours(group_id, requester_user_id)
         if group:
             raise SynapseError(400, "Group already exists")
 
@@ -811,7 +871,7 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
             local_attestation = self.attestations.create_attestation(
                 group_id, requester_user_id
-            )
+            )  # type: Optional[JsonDict]
         else:
             local_attestation = None
             remote_attestation = None
@@ -834,15 +894,14 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
 
         return {"group_id": group_id}
 
-    async def delete_group(self, group_id, requester_user_id):
+    async def delete_group(self, group_id: str, requester_user_id: str) -> None:
         """Deletes a group, kicking out all current members.
 
         Only group admins or server admins can call this request
 
         Args:
-            group_id (str)
-            request_user_id (str)
-
+            group_id: The group ID to delete.
+            requester_user_id: The user requesting to delete the group.
         """
 
         await self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
@@ -865,6 +924,9 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         async def _kick_user_from_group(user_id):
             if self.hs.is_mine_id(user_id):
                 groups_local = self.hs.get_groups_local_handler()
+                assert isinstance(
+                    groups_local, GroupsLocalHandler
+                ), "Workers cannot kick users from groups."
                 await groups_local.user_removed_from_group(group_id, user_id, {})
             else:
                 await self.transport_client.remove_user_from_group_notification(
@@ -896,9 +958,8 @@ class GroupsServerHandler(GroupsServerWorkerHandler):
         await self.store.delete_group(group_id)
 
 
-def _parse_join_policy_from_contents(content):
-    """Given a content for a request, return the specified join policy or None
-    """
+def _parse_join_policy_from_contents(content: JsonDict) -> Optional[str]:
+    """Given a content for a request, return the specified join policy or None"""
 
     join_policy_dict = content.get("m.join_policy")
     if join_policy_dict:
@@ -907,9 +968,8 @@ def _parse_join_policy_from_contents(content):
         return None
 
 
-def _parse_join_policy_dict(join_policy_dict):
-    """Given a dict for the "m.join_policy" config return the join policy specified
-    """
+def _parse_join_policy_dict(join_policy_dict: JsonDict) -> str:
+    """Given a dict for the "m.join_policy" config return the join policy specified"""
     join_policy_type = join_policy_dict.get("type")
     if not join_policy_type:
         return "invite"
@@ -919,7 +979,7 @@ def _parse_join_policy_dict(join_policy_dict):
     return join_policy_type
 
 
-def _parse_visibility_from_contents(content):
+def _parse_visibility_from_contents(content: JsonDict) -> bool:
     """Given a content for a request parse out whether the entity should be
     public or not
     """
@@ -933,7 +993,7 @@ def _parse_visibility_from_contents(content):
     return is_public
 
 
-def _parse_visibility_dict(visibility):
+def _parse_visibility_dict(visibility: JsonDict) -> bool:
     """Given a dict for the "m.visibility" config return if the entity should
     be public or not
     """

synapse/handlers/acme.py

@@ -73,7 +73,9 @@ class AcmeHandler:
                 "Listening for ACME requests on %s:%i", host, self.hs.config.acme_port
             )
             try:
-                self.reactor.listenTCP(self.hs.config.acme_port, srv, interface=host)
+                self.reactor.listenTCP(
+                    self.hs.config.acme_port, srv, backlog=50, interface=host
+                )
             except twisted.internet.error.CannotListenError as e:
                 check_bind_error(e, host, bind_addresses)
 

synapse/handlers/admin.py

@@ -203,13 +203,11 @@ class AdminHandler(BaseHandler):
 
 
 class ExfiltrationWriter(metaclass=abc.ABCMeta):
-    """Interface used to specify how to write exported data.
-    """
+    """Interface used to specify how to write exported data."""
 
     @abc.abstractmethod
     def write_events(self, room_id: str, events: List[EventBase]) -> None:
-        """Write a batch of events for a room.
-        """
+        """Write a batch of events for a room."""
         raise NotImplementedError()
 
     @abc.abstractmethod

synapse/handlers/appservice.py

@@ -290,7 +290,9 @@ class ApplicationServicesHandler:
             if not interested:
                 continue
             presence_events, _ = await presence_source.get_new_events(
-                user=user, service=service, from_key=from_key,
+                user=user,
+                service=service,
+                from_key=from_key,
             )
             time_now = self.clock.time_msec()
             events.extend(