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# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket 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 logging
import synapse.http.servlet
from synapse.http.server import (
DirectServeResource,
set_cors_headers,
wrap_json_request_handler,
)
from ._base import parse_media_id, respond_404
logger = logging.getLogger(__name__)
class DownloadResource(DirectServeResource):
isLeaf = True
def __init__(self, hs, media_repo):
super().__init__()
self.media_repo = media_repo
self.server_name = hs.hostname
# this is expected by @wrap_json_request_handler
self.clock = hs.get_clock()
@wrap_json_request_handler
async def _async_render_GET(self, request):
set_cors_headers(request)
request.setHeader(
b"Content-Security-Policy",
b"sandbox;"
b" default-src 'none';"
b" script-src 'none';"
b" plugin-types application/pdf;"
b" style-src 'unsafe-inline';"
b" media-src 'self';"
b" object-src 'self';",
)
request.setHeader(
b"Referrer-Policy", b"no-referrer",
)
server_name, media_id, name = parse_media_id(request)
if server_name == self.server_name:
await self.media_repo.get_local_media(request, media_id, name)
else:
allow_remote = synapse.http.servlet.parse_boolean(
request, "allow_remote", default=True
)
if not allow_remote:
logger.info(
"Rejecting request for remote media %s/%s due to allow_remote",
server_name,
media_id,
)
respond_404(request)
return
await self.media_repo.get_remote_media(request, server_name, media_id, name)
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