From e244ee513bb42ce1a342d966f07852d648fea7ec Mon Sep 17 00:00:00 2001
From: Eric Eastwood <erice@element.io>
Date: Mon, 12 Sep 2022 18:00:58 -0500
Subject: [PATCH] Add tag

---
 synapse/logging/opentracing.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/synapse/logging/opentracing.py b/synapse/logging/opentracing.py
index ca2735dd6d..0319ea72fc 100644
--- a/synapse/logging/opentracing.py
+++ b/synapse/logging/opentracing.py
@@ -303,6 +303,10 @@ class SynapseTags:
     # incoming HTTP request ID  (as written in the logs)
     REQUEST_ID = "request_id"
 
+    # Tag a header from the incoming request. The name of the header should be
+    # appended to this prefix.
+    REQUEST_HEADER_PREFIX = "request_header."
+
     # HTTP request tag (used to distinguish full vs incremental syncs, etc)
     REQUEST_TAG = "request_tag"