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6cf261930a
Synapse doesn’t allow for media resources to be played directly from Chrome. It is a problem for users on other networks (e.g. IRC) communicating with Matrix users through a gateway. The gateway sends them the raw URL for the resource when a Matrix user uploads a video and the video cannot be played directly in Chrome using that URL. Chrome argues it is not authorized to play the video because of the Content Security Policy. Chrome checks for the "media-src" policy which is missing, and defauts to the "default-src" policy which is "none". As Synapse already sends "object-src: 'self'" I thought it wouldn’t be a problem to add "media-src: 'self'" to the CSP to fix this problem.
73 lines
2.4 KiB
Python
73 lines
2.4 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from twisted.internet import defer
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from twisted.web.resource import Resource
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from twisted.web.server import NOT_DONE_YET
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import synapse.http.servlet
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from synapse.http.server import set_cors_headers, wrap_json_request_handler
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from ._base import parse_media_id, respond_404
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logger = logging.getLogger(__name__)
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class DownloadResource(Resource):
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isLeaf = True
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def __init__(self, hs, media_repo):
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Resource.__init__(self)
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self.media_repo = media_repo
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self.server_name = hs.hostname
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# this is expected by @wrap_json_request_handler
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self.clock = hs.get_clock()
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def render_GET(self, request):
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self._async_render_GET(request)
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return NOT_DONE_YET
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@wrap_json_request_handler
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@defer.inlineCallbacks
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def _async_render_GET(self, request):
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set_cors_headers(request)
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request.setHeader(
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b"Content-Security-Policy",
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b"default-src 'none';"
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b" script-src 'none';"
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b" plugin-types application/pdf;"
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b" style-src 'unsafe-inline';"
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b" media-src 'self';"
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b" object-src 'self';"
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)
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server_name, media_id, name = parse_media_id(request)
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if server_name == self.server_name:
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yield self.media_repo.get_local_media(request, media_id, name)
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else:
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allow_remote = synapse.http.servlet.parse_boolean(
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request, "allow_remote", default=True)
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if not allow_remote:
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logger.info(
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"Rejecting request for remote media %s/%s due to allow_remote",
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server_name, media_id,
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)
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respond_404(request)
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return
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yield self.media_repo.get_remote_media(request, server_name, media_id, name)
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