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Remove trailing slashes from outbound federation requests and retry on 400 (#4840)

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As per #3622, we remove trailing slashes from outbound federation requests. However, to ensure that we remain backwards compatible with previous versions of Synapse, if we receive a HTTP 400 with `M_UNRECOGNIZED`, then we are likely talking to an older version of Synapse in which case we retry with a trailing slash appended to the request path.
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Andrew Morgan 2019-03-21 15:07:28 +00:00 • committed by GitHub
commit 7bef97dfb7
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5 changed files with 191 additions and 17 deletions
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21
synapse/federation/transport/client.py
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@ -51,9 +51,10 @@ class TransportLayerClient(object):
logger.debug("get_room_state dest=%s, room=%s",
destination, room_id)
path = _create_v1_path("/state/%s/", room_id)
path = _create_v1_path("/state/%s", room_id)
return self.client.get_json(
destination, path=path, args={"event_id": event_id},
try_trailing_slash_on_400=True,
)
@log_function
@ -73,9 +74,10 @@ class TransportLayerClient(object):
logger.debug("get_room_state_ids dest=%s, room=%s",
destination, room_id)
path = _create_v1_path("/state_ids/%s/", room_id)
path = _create_v1_path("/state_ids/%s", room_id)
return self.client.get_json(
destination, path=path, args={"event_id": event_id},
try_trailing_slash_on_400=True,
)
@log_function
@ -95,8 +97,11 @@ class TransportLayerClient(object):
logger.debug("get_pdu dest=%s, event_id=%s",
destination, event_id)
path = _create_v1_path("/event/%s/", event_id)
return self.client.get_json(destination, path=path, timeout=timeout)
path = _create_v1_path("/event/%s", event_id)
return self.client.get_json(
destination, path=path, timeout=timeout,
try_trailing_slash_on_400=True,
)
@log_function
def backfill(self, destination, room_id, event_tuples, limit):
@ -121,7 +126,7 @@ class TransportLayerClient(object):
# TODO: raise?
return
path = _create_v1_path("/backfill/%s/", room_id)
path = _create_v1_path("/backfill/%s", room_id)
args = {
"v": event_tuples,
@ -132,6 +137,7 @@ class TransportLayerClient(object):
destination,
path=path,
args=args,
try_trailing_slash_on_400=True,
)
@defer.inlineCallbacks
@ -176,6 +182,7 @@ class TransportLayerClient(object):
json_data_callback=json_data_callback,
long_retries=True,
backoff_on_404=True, # If we get a 404 the other side has gone
try_trailing_slash_on_400=True,
)
defer.returnValue(response)
@ -959,7 +966,7 @@ def _create_v1_path(path, *args):
Example:
_create_v1_path("/event/%s/", event_id)
_create_v1_path("/event/%s", event_id)
Args:
path (str): String template for the path
@ -980,7 +987,7 @@ def _create_v2_path(path, *args):
Example:
_create_v2_path("/event/%s/", event_id)
_create_v2_path("/event/%s", event_id)
Args:
path (str): String template for the path