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