88 lines
3.0 KiB
Python
88 lines
3.0 KiB
Python
# Copyright 2014-2016 OpenMarket Ltd
|
|
# Copyright 2020-2021 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# 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 re
|
|
from typing import TYPE_CHECKING, Optional
|
|
|
|
from synapse.http.server import set_corp_headers, set_cors_headers
|
|
from synapse.http.servlet import RestServlet, parse_boolean
|
|
from synapse.http.site import SynapseRequest
|
|
from synapse.media._base import respond_404
|
|
from synapse.util.stringutils import parse_and_validate_server_name
|
|
|
|
if TYPE_CHECKING:
|
|
from synapse.media.media_repository import MediaRepository
|
|
from synapse.server import HomeServer
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class DownloadResource(RestServlet):
|
|
PATTERNS = [
|
|
re.compile(
|
|
"/_matrix/media/(r0|v3|v1)/download/(?P<server_name>[^/]*)/(?P<media_id>[^/]*)(/(?P<file_name>[^/]*))?$"
|
|
)
|
|
]
|
|
|
|
def __init__(self, hs: "HomeServer", media_repo: "MediaRepository"):
|
|
super().__init__()
|
|
self.media_repo = media_repo
|
|
self._is_mine_server_name = hs.is_mine_server_name
|
|
|
|
async def on_GET(
|
|
self,
|
|
request: SynapseRequest,
|
|
server_name: str,
|
|
media_id: str,
|
|
file_name: Optional[str] = None,
|
|
) -> None:
|
|
# Validate the server name, raising if invalid
|
|
parse_and_validate_server_name(server_name)
|
|
|
|
set_cors_headers(request)
|
|
set_corp_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';",
|
|
)
|
|
# Limited non-standard form of CSP for IE11
|
|
request.setHeader(b"X-Content-Security-Policy", b"sandbox;")
|
|
request.setHeader(
|
|
b"Referrer-Policy",
|
|
b"no-referrer",
|
|
)
|
|
if self._is_mine_server_name(server_name):
|
|
await self.media_repo.get_local_media(request, media_id, file_name)
|
|
else:
|
|
allow_remote = 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, file_name
|
|
)
|