synapse-product/synapse/http/additional_resource.py

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# -*- coding: utf-8 -*-
# Copyright 2017 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.
from synapse.http.server import wrap_json_request_handler
from twisted.web.resource import Resource
from twisted.web.server import NOT_DONE_YET
class AdditionalResource(Resource):
"""Resource wrapper for additional_resources
If the user has configured additional_resources, we need to wrap the
handler class with a Resource so that we can map it into the resource tree.
This class is also where we wrap the request handler with logging, metrics,
and exception handling.
"""
def __init__(self, hs, handler):
"""Initialise AdditionalResource
The ``handler`` should return a deferred which completes when it has
done handling the request. It should write a response with
``request.write()``, and call ``request.finish()``.
Args:
hs (synapse.server.HomeServer): homeserver
handler ((twisted.web.server.Request) -> twisted.internet.defer.Deferred):
function to be called to handle the request.
"""
Resource.__init__(self)
self._handler = handler
# required by the request_handler wrapper
self.clock = hs.get_clock()
def render(self, request):
self._async_render(request)
return NOT_DONE_YET
@wrap_json_request_handler
def _async_render(self, request):
return self._handler(request)