Respond with proper error responses on unknown paths. (#14621)

Returns a proper 404 with an errcode of M_RECOGNIZED for
unknown endpoints per MSC3743.

1 files changed, 2 insertions, 4 deletions

diff --git a/synapse/api/errors.py b/synapse/api/errors.py

index e2cfcea0f2..76ef12ed3a 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -300,10 +300,8 @@ class InteractiveAuthIncompleteError(Exception):
 class UnrecognizedRequestError(SynapseError):
     """An error indicating we don't understand the request you're trying to make"""
 
-    def __init__(
-        self, msg: str = "Unrecognized request", errcode: str = Codes.UNRECOGNIZED
-    ):
-        super().__init__(400, msg, errcode)
+    def __init__(self, msg: str = "Unrecognized request", code: int = 400):
+        super().__init__(code, msg, Codes.UNRECOGNIZED)
 
 
 class NotFoundError(SynapseError):