mirror of
https://mau.dev/maunium/synapse.git
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195 lines
6.2 KiB
Python
195 lines
6.2 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 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 synapse.http.server import respond_with_json
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from synapse.util.stringutils import random_string
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from synapse.api.errors import (
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cs_exception, CodeMessageException, cs_error, Codes
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)
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from twisted.protocols.basic import FileSender
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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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from twisted.internet import defer
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import os
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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, filepaths):
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Resource.__init__(self)
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self.client = hs.get_http_client()
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self.clock = hs.get_clock()
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self.server_name = hs.hostname
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self.store = hs.get_datastore()
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self.filepaths = filepaths
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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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def _respond_404(self, request):
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respond_with_json(
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request, 404,
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cs_error(
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"Not found %r" % (request.postpath,),
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code=Codes.NOT_FOUND,
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),
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send_cors=True
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)
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@defer.inlineCallbacks
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def _async_render_GET(self, request):
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try:
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server_name, media_id = request.postpath
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except:
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self._respond_404(request)
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return
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try:
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if server_name == self.server_name:
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yield self._respond_local_file(request, media_id)
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else:
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yield self._respond_remote_file(request, server_name, media_id)
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except CodeMessageException as e:
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logger.exception(e)
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respond_with_json(request, e.code, cs_exception(e), send_cors=True)
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except:
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logger.exception("Failed to serve file")
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respond_with_json(
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request,
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500,
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{"error": "Internal server error"},
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send_cors=True
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)
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@defer.inlineCallbacks
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def _download_remote_file(self, server_name, media_id):
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filesystem_id = random_string(24)
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fname = self.filepaths.remote_media_filepath(
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server_name, filesystem_id
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)
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os.makedirs(os.path.dirname(fname))
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try:
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with open(fname, "wb") as f:
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length, headers = yield self.client.get_file(
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server_name,
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"/".join((
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"/_matrix/media/v1/download", server_name, media_id,
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)),
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output_stream=f,
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)
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except:
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os.remove(fname)
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raise
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media_type = headers["Content-Type"][0]
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time_now_ms = self.clock.time_msec()
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yield self.store.store_cached_remote_media(
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origin=server_name,
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media_id=media_id,
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media_type=media_type,
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time_now_ms=self.clock.time_msec(),
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upload_name=None,
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media_length=length,
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filesystem_id=filesystem_id,
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)
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defer.returnValue({
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"media_type": media_type,
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"media_length": length,
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"upload_name": None,
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"created_ts": time_now_ms,
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"filesystem_id": filesystem_id,
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})
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@defer.inlineCallbacks
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def _respond_remote_file(self, request, server_name, media_id):
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media_info = yield self.store.get_cached_remote_media(
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server_name, media_id
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)
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if not media_info:
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media_info = yield self._download_remote_file(
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server_name, media_id
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)
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filesystem_id = media_info["filesystem_id"]
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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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if os.path.isfile(file_path):
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media_type = media_info["media_type"]
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request.setHeader(b"Content-Type", media_type.encode("UTF-8"))
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# cache for at least a day.
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# XXX: we might want to turn this off for data we don't want to
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# recommend caching as it's sensitive or private - or at least
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# select private. don't bother setting Expires as all our
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# clients are smart enough to be happy with Cache-Control
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request.setHeader(
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b"Cache-Control", b"public,max-age=86400,s-maxage=86400"
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)
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with open(file_path, "rb") as f:
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yield FileSender().beginFileTransfer(f, request)
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request.finish()
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else:
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self._respond_404()
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@defer.inlineCallbacks
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def _respond_local_file(self, request, media_id):
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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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self._respond_404()
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return
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file_path = self.filepaths.local_media_filepath(media_id)
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logger.debug("Searching for %s", file_path)
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if os.path.isfile(file_path):
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media_type = media_info["media_type"]
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request.setHeader(b"Content-Type", media_type.encode("UTF-8"))
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# cache for at least a day.
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# XXX: we might want to turn this off for data we don't want to
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# recommend caching as it's sensitive or private - or at least
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# select private. don't bother setting Expires as all our
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# clients are smart enough to be happy with Cache-Control
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request.setHeader(
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b"Cache-Control", b"public,max-age=86400,s-maxage=86400"
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)
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with open(file_path, "rb") as f:
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yield FileSender().beginFileTransfer(f, request)
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request.finish()
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else:
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self._respond_404()
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