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0af9e1a637
This is to inform browsers that they should sandbox the returned media. This is particularly cruical for javascript/HTML files.
91 lines
3.0 KiB
Python
91 lines
3.0 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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from ._base import parse_media_id, respond_with_file, respond_404
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from twisted.web.resource import Resource
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from synapse.http.server import request_handler
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from twisted.web.server import NOT_DONE_YET
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from twisted.internet import defer
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import logging
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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.filepaths = media_repo.filepaths
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self.media_repo = media_repo
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self.server_name = hs.hostname
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self.store = hs.get_datastore()
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self.version_string = hs.version_string
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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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@request_handler()
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@defer.inlineCallbacks
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def _async_render_GET(self, request):
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request.setHeader("Content-Security-Policy", "sandbox")
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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._respond_local_file(request, media_id, name)
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else:
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yield self._respond_remote_file(
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request, server_name, media_id, name
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)
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@defer.inlineCallbacks
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def _respond_local_file(self, request, media_id, name):
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media_info = yield self.store.get_local_media(media_id)
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if not media_info:
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respond_404(request)
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return
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media_type = media_info["media_type"]
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media_length = media_info["media_length"]
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upload_name = name if name else media_info["upload_name"]
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file_path = self.filepaths.local_media_filepath(media_id)
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yield respond_with_file(
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request, media_type, file_path, media_length,
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upload_name=upload_name,
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)
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@defer.inlineCallbacks
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def _respond_remote_file(self, request, server_name, media_id, name):
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media_info = yield self.media_repo.get_remote_media(server_name, media_id)
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media_type = media_info["media_type"]
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media_length = media_info["media_length"]
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filesystem_id = media_info["filesystem_id"]
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upload_name = name if name else media_info["upload_name"]
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file_path = self.filepaths.remote_media_filepath(
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server_name, filesystem_id
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)
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yield respond_with_file(
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request, media_type, file_path, media_length,
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upload_name=upload_name,
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)
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