# -*- coding: utf-8 -*- # Copyright 2014-2016 OpenMarket Ltd # Copyright 2018 New Vector Ltd # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # 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. import re from twisted.internet import task from twisted.internet.defer import CancelledError from twisted.python import failure from twisted.web.client import FileBodyProducer from synapse.api.errors import SynapseError class RequestTimedOutError(SynapseError): """Exception representing timeout of an outbound request""" def __init__(self): super(RequestTimedOutError, self).__init__(504, "Timed out") def cancelled_to_request_timed_out_error(value, timeout): """Turns CancelledErrors into RequestTimedOutErrors. For use with async.add_timeout_to_deferred """ if isinstance(value, failure.Failure): value.trap(CancelledError) raise RequestTimedOutError() return value ACCESS_TOKEN_RE = re.compile(r"(\?.*access(_|%5[Ff])token=)[^&]*(.*)$") CLIENT_SECRET_RE = re.compile(r"(\?.*client(_|%5[Ff])secret=)[^&]*(.*)$") def redact_uri(uri): """Strips sensitive information from the uri replaces with <redacted>""" uri = ACCESS_TOKEN_RE.sub(r"\1<redacted>\3", uri) return CLIENT_SECRET_RE.sub(r"\1<redacted>\3", uri) class QuieterFileBodyProducer(FileBodyProducer): """Wrapper for FileBodyProducer that avoids CRITICAL errors when the connection drops. Workaround for https://github.com/matrix-org/synapse/issues/4003 / https://twistedmatrix.com/trac/ticket/6528 """ def stopProducing(self): try: FileBodyProducer.stopProducing(self) except task.TaskStopped: pass