mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-12-19 17:34:18 -05:00
b970cb0e96
* Correctly retry and back off if we get a HTTPerror response * Refactor request sending to have better excpetions MatrixFederationHttpClient blindly reraised exceptions to the caller without differentiating "expected" failures (e.g. connection timeouts etc) versus more severe problems (e.g. programming errors). This commit adds a RequestSendFailed exception that is raised when "expected" failures happen, allowing the TransactionQueue to log them as warnings while allowing us to log other exceptions as actual exceptions.
749 lines
26 KiB
Python
749 lines
26 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2018 New Vector 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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import errno
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import logging
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import os
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import shutil
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from six import iteritems
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import twisted.internet.error
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import twisted.web.http
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from twisted.internet import defer
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from twisted.web.resource import Resource
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from synapse.api.errors import (
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FederationDeniedError,
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HttpResponseException,
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NotFoundError,
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RequestSendFailed,
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SynapseError,
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)
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from synapse.metrics.background_process_metrics import run_as_background_process
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from synapse.util import logcontext
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from synapse.util.async_helpers import Linearizer
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from synapse.util.retryutils import NotRetryingDestination
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from synapse.util.stringutils import random_string
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from ._base import (
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FileInfo,
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get_filename_from_headers,
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respond_404,
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respond_with_responder,
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)
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from .config_resource import MediaConfigResource
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from .download_resource import DownloadResource
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from .filepath import MediaFilePaths
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from .media_storage import MediaStorage
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from .preview_url_resource import PreviewUrlResource
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from .storage_provider import StorageProviderWrapper
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from .thumbnail_resource import ThumbnailResource
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from .thumbnailer import Thumbnailer
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from .upload_resource import UploadResource
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logger = logging.getLogger(__name__)
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UPDATE_RECENTLY_ACCESSED_TS = 60 * 1000
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class MediaRepository(object):
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def __init__(self, hs):
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self.hs = hs
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self.auth = hs.get_auth()
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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.max_upload_size = hs.config.max_upload_size
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self.max_image_pixels = hs.config.max_image_pixels
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self.primary_base_path = hs.config.media_store_path
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self.filepaths = MediaFilePaths(self.primary_base_path)
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self.dynamic_thumbnails = hs.config.dynamic_thumbnails
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self.thumbnail_requirements = hs.config.thumbnail_requirements
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self.remote_media_linearizer = Linearizer(name="media_remote")
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self.recently_accessed_remotes = set()
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self.recently_accessed_locals = set()
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self.federation_domain_whitelist = hs.config.federation_domain_whitelist
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# List of StorageProviders where we should search for media and
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# potentially upload to.
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storage_providers = []
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for clz, provider_config, wrapper_config in hs.config.media_storage_providers:
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backend = clz(hs, provider_config)
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provider = StorageProviderWrapper(
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backend,
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store_local=wrapper_config.store_local,
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store_remote=wrapper_config.store_remote,
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store_synchronous=wrapper_config.store_synchronous,
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)
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storage_providers.append(provider)
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self.media_storage = MediaStorage(
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self.hs, self.primary_base_path, self.filepaths, storage_providers,
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)
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self.clock.looping_call(
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self._start_update_recently_accessed,
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UPDATE_RECENTLY_ACCESSED_TS,
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)
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def _start_update_recently_accessed(self):
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return run_as_background_process(
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"update_recently_accessed_media", self._update_recently_accessed,
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)
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@defer.inlineCallbacks
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def _update_recently_accessed(self):
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remote_media = self.recently_accessed_remotes
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self.recently_accessed_remotes = set()
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local_media = self.recently_accessed_locals
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self.recently_accessed_locals = set()
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yield self.store.update_cached_last_access_time(
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local_media, remote_media, self.clock.time_msec()
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)
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def mark_recently_accessed(self, server_name, media_id):
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"""Mark the given media as recently accessed.
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Args:
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server_name (str|None): Origin server of media, or None if local
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media_id (str): The media ID of the content
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"""
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if server_name:
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self.recently_accessed_remotes.add((server_name, media_id))
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else:
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self.recently_accessed_locals.add(media_id)
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@defer.inlineCallbacks
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def create_content(self, media_type, upload_name, content, content_length,
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auth_user):
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"""Store uploaded content for a local user and return the mxc URL
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Args:
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media_type(str): The content type of the file
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upload_name(str): The name of the file
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content: A file like object that is the content to store
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content_length(int): The length of the content
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auth_user(str): The user_id of the uploader
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Returns:
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Deferred[str]: The mxc url of the stored content
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"""
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media_id = random_string(24)
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file_info = FileInfo(
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server_name=None,
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file_id=media_id,
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)
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fname = yield self.media_storage.store_file(content, file_info)
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logger.info("Stored local media in file %r", fname)
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yield self.store.store_local_media(
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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=upload_name,
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media_length=content_length,
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user_id=auth_user,
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)
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yield self._generate_thumbnails(
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None, media_id, media_id, media_type,
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)
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defer.returnValue("mxc://%s/%s" % (self.server_name, media_id))
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@defer.inlineCallbacks
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def get_local_media(self, request, media_id, name):
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"""Responds to reqests for local media, if exists, or returns 404.
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Args:
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request(twisted.web.http.Request)
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media_id (str): The media ID of the content. (This is the same as
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the file_id for local content.)
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name (str|None): Optional name that, if specified, will be used as
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the filename in the Content-Disposition header of the response.
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Returns:
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Deferred: Resolves once a response has successfully been written
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to request
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"""
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media_info = yield self.store.get_local_media(media_id)
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if not media_info or media_info["quarantined_by"]:
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respond_404(request)
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return
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self.mark_recently_accessed(None, 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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upload_name = name if name else media_info["upload_name"]
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url_cache = media_info["url_cache"]
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file_info = FileInfo(
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None, media_id,
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url_cache=url_cache,
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)
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responder = yield self.media_storage.fetch_media(file_info)
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yield respond_with_responder(
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request, responder, media_type, media_length, upload_name,
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)
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@defer.inlineCallbacks
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def get_remote_media(self, request, server_name, media_id, name):
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"""Respond to requests for remote media.
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Args:
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request(twisted.web.http.Request)
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server_name (str): Remote server_name where the media originated.
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media_id (str): The media ID of the content (as defined by the
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remote server).
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name (str|None): Optional name that, if specified, will be used as
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the filename in the Content-Disposition header of the response.
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Returns:
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Deferred: Resolves once a response has successfully been written
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to request
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"""
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if (
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self.federation_domain_whitelist is not None and
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server_name not in self.federation_domain_whitelist
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):
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raise FederationDeniedError(server_name)
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self.mark_recently_accessed(server_name, media_id)
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# We linearize here to ensure that we don't try and download remote
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# media multiple times concurrently
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key = (server_name, media_id)
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with (yield self.remote_media_linearizer.queue(key)):
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responder, media_info = yield self._get_remote_media_impl(
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server_name, media_id,
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)
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# We deliberately stream the file outside the lock
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if responder:
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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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yield respond_with_responder(
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request, responder, media_type, media_length, upload_name,
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)
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else:
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respond_404(request)
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@defer.inlineCallbacks
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def get_remote_media_info(self, server_name, media_id):
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"""Gets the media info associated with the remote file, downloading
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if necessary.
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Args:
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server_name (str): Remote server_name where the media originated.
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media_id (str): The media ID of the content (as defined by the
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remote server).
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Returns:
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Deferred[dict]: The media_info of the file
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"""
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if (
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self.federation_domain_whitelist is not None and
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server_name not in self.federation_domain_whitelist
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):
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raise FederationDeniedError(server_name)
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# We linearize here to ensure that we don't try and download remote
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# media multiple times concurrently
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key = (server_name, media_id)
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with (yield self.remote_media_linearizer.queue(key)):
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responder, media_info = yield self._get_remote_media_impl(
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server_name, media_id,
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)
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# Ensure we actually use the responder so that it releases resources
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if responder:
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with responder:
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pass
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defer.returnValue(media_info)
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@defer.inlineCallbacks
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def _get_remote_media_impl(self, server_name, media_id):
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"""Looks for media in local cache, if not there then attempt to
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download from remote server.
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Args:
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server_name (str): Remote server_name where the media originated.
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media_id (str): The media ID of the content (as defined by the
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remote server).
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Returns:
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Deferred[(Responder, media_info)]
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"""
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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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# file_id is the ID we use to track the file locally. If we've already
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# seen the file then reuse the existing ID, otherwise genereate a new
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# one.
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if media_info:
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file_id = media_info["filesystem_id"]
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else:
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file_id = random_string(24)
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file_info = FileInfo(server_name, file_id)
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# If we have an entry in the DB, try and look for it
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if media_info:
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if media_info["quarantined_by"]:
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logger.info("Media is quarantined")
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raise NotFoundError()
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responder = yield self.media_storage.fetch_media(file_info)
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if responder:
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defer.returnValue((responder, media_info))
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# Failed to find the file anywhere, lets download it.
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media_info = yield self._download_remote_file(
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server_name, media_id, file_id
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)
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responder = yield self.media_storage.fetch_media(file_info)
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defer.returnValue((responder, media_info))
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@defer.inlineCallbacks
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def _download_remote_file(self, server_name, media_id, file_id):
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"""Attempt to download the remote file from the given server name,
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using the given file_id as the local id.
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Args:
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server_name (str): Originating server
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media_id (str): The media ID of the content (as defined by the
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remote server). This is different than the file_id, which is
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locally generated.
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file_id (str): Local file ID
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Returns:
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Deferred[MediaInfo]
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"""
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file_info = FileInfo(
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server_name=server_name,
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file_id=file_id,
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)
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with self.media_storage.store_into_file(file_info) as (f, fname, finish):
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request_path = "/".join((
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"/_matrix/media/v1/download", server_name, media_id,
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))
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try:
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length, headers = yield self.client.get_file(
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server_name, request_path, output_stream=f,
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max_size=self.max_upload_size, args={
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# tell the remote server to 404 if it doesn't
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# recognise the server_name, to make sure we don't
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# end up with a routing loop.
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"allow_remote": "false",
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}
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)
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except RequestSendFailed as e:
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logger.warn("Request failed fetching remote media %s/%s: %r",
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server_name, media_id, e)
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raise SynapseError(502, "Failed to fetch remote media")
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except HttpResponseException as e:
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logger.warn("HTTP error fetching remote media %s/%s: %s",
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server_name, media_id, e.response)
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if e.code == twisted.web.http.NOT_FOUND:
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raise e.to_synapse_error()
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raise SynapseError(502, "Failed to fetch remote media")
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except SynapseError:
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logger.exception("Failed to fetch remote media %s/%s",
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server_name, media_id)
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raise
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except NotRetryingDestination:
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logger.warn("Not retrying destination %r", server_name)
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raise SynapseError(502, "Failed to fetch remote media")
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except Exception:
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logger.exception("Failed to fetch remote media %s/%s",
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server_name, media_id)
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raise SynapseError(502, "Failed to fetch remote media")
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yield finish()
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media_type = headers[b"Content-Type"][0].decode('ascii')
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upload_name = get_filename_from_headers(headers)
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time_now_ms = self.clock.time_msec()
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logger.info("Stored remote media in file %r", fname)
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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=upload_name,
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media_length=length,
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filesystem_id=file_id,
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)
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media_info = {
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"media_type": media_type,
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"media_length": length,
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"upload_name": upload_name,
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"created_ts": time_now_ms,
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"filesystem_id": file_id,
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}
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yield self._generate_thumbnails(
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server_name, media_id, file_id, media_type,
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)
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defer.returnValue(media_info)
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def _get_thumbnail_requirements(self, media_type):
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return self.thumbnail_requirements.get(media_type, ())
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def _generate_thumbnail(self, thumbnailer, t_width, t_height,
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t_method, t_type):
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m_width = thumbnailer.width
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m_height = thumbnailer.height
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if m_width * m_height >= self.max_image_pixels:
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logger.info(
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"Image too large to thumbnail %r x %r > %r",
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m_width, m_height, self.max_image_pixels
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)
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return
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if t_method == "crop":
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t_byte_source = thumbnailer.crop(t_width, t_height, t_type)
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elif t_method == "scale":
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t_width, t_height = thumbnailer.aspect(t_width, t_height)
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t_width = min(m_width, t_width)
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t_height = min(m_height, t_height)
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t_byte_source = thumbnailer.scale(t_width, t_height, t_type)
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else:
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t_byte_source = None
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return t_byte_source
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@defer.inlineCallbacks
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def generate_local_exact_thumbnail(self, media_id, t_width, t_height,
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t_method, t_type, url_cache):
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input_path = yield self.media_storage.ensure_media_is_in_local_cache(FileInfo(
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None, media_id, url_cache=url_cache,
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))
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thumbnailer = Thumbnailer(input_path)
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t_byte_source = yield logcontext.defer_to_thread(
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self.hs.get_reactor(),
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self._generate_thumbnail,
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thumbnailer, t_width, t_height, t_method, t_type
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)
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if t_byte_source:
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try:
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file_info = FileInfo(
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server_name=None,
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file_id=media_id,
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url_cache=url_cache,
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thumbnail=True,
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thumbnail_width=t_width,
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thumbnail_height=t_height,
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thumbnail_method=t_method,
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thumbnail_type=t_type,
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)
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output_path = yield self.media_storage.store_file(
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t_byte_source, file_info,
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)
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finally:
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t_byte_source.close()
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logger.info("Stored thumbnail in file %r", output_path)
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t_len = os.path.getsize(output_path)
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yield self.store.store_local_thumbnail(
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media_id, t_width, t_height, t_type, t_method, t_len
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)
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defer.returnValue(output_path)
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@defer.inlineCallbacks
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def generate_remote_exact_thumbnail(self, server_name, file_id, media_id,
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t_width, t_height, t_method, t_type):
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input_path = yield self.media_storage.ensure_media_is_in_local_cache(FileInfo(
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server_name, file_id, url_cache=False,
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))
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thumbnailer = Thumbnailer(input_path)
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t_byte_source = yield logcontext.defer_to_thread(
|
|
self.hs.get_reactor(),
|
|
self._generate_thumbnail,
|
|
thumbnailer, t_width, t_height, t_method, t_type
|
|
)
|
|
|
|
if t_byte_source:
|
|
try:
|
|
file_info = FileInfo(
|
|
server_name=server_name,
|
|
file_id=media_id,
|
|
thumbnail=True,
|
|
thumbnail_width=t_width,
|
|
thumbnail_height=t_height,
|
|
thumbnail_method=t_method,
|
|
thumbnail_type=t_type,
|
|
)
|
|
|
|
output_path = yield self.media_storage.store_file(
|
|
t_byte_source, file_info,
|
|
)
|
|
finally:
|
|
t_byte_source.close()
|
|
|
|
logger.info("Stored thumbnail in file %r", output_path)
|
|
|
|
t_len = os.path.getsize(output_path)
|
|
|
|
yield self.store.store_remote_media_thumbnail(
|
|
server_name, media_id, file_id,
|
|
t_width, t_height, t_type, t_method, t_len
|
|
)
|
|
|
|
defer.returnValue(output_path)
|
|
|
|
@defer.inlineCallbacks
|
|
def _generate_thumbnails(self, server_name, media_id, file_id, media_type,
|
|
url_cache=False):
|
|
"""Generate and store thumbnails for an image.
|
|
|
|
Args:
|
|
server_name (str|None): The server name if remote media, else None if local
|
|
media_id (str): The media ID of the content. (This is the same as
|
|
the file_id for local content)
|
|
file_id (str): Local file ID
|
|
media_type (str): The content type of the file
|
|
url_cache (bool): If we are thumbnailing images downloaded for the URL cache,
|
|
used exclusively by the url previewer
|
|
|
|
Returns:
|
|
Deferred[dict]: Dict with "width" and "height" keys of original image
|
|
"""
|
|
requirements = self._get_thumbnail_requirements(media_type)
|
|
if not requirements:
|
|
return
|
|
|
|
input_path = yield self.media_storage.ensure_media_is_in_local_cache(FileInfo(
|
|
server_name, file_id, url_cache=url_cache,
|
|
))
|
|
|
|
thumbnailer = Thumbnailer(input_path)
|
|
m_width = thumbnailer.width
|
|
m_height = thumbnailer.height
|
|
|
|
if m_width * m_height >= self.max_image_pixels:
|
|
logger.info(
|
|
"Image too large to thumbnail %r x %r > %r",
|
|
m_width, m_height, self.max_image_pixels
|
|
)
|
|
return
|
|
|
|
# We deduplicate the thumbnail sizes by ignoring the cropped versions if
|
|
# they have the same dimensions of a scaled one.
|
|
thumbnails = {}
|
|
for r_width, r_height, r_method, r_type in requirements:
|
|
if r_method == "crop":
|
|
thumbnails.setdefault((r_width, r_height, r_type), r_method)
|
|
elif r_method == "scale":
|
|
t_width, t_height = thumbnailer.aspect(r_width, r_height)
|
|
t_width = min(m_width, t_width)
|
|
t_height = min(m_height, t_height)
|
|
thumbnails[(t_width, t_height, r_type)] = r_method
|
|
|
|
# Now we generate the thumbnails for each dimension, store it
|
|
for (t_width, t_height, t_type), t_method in iteritems(thumbnails):
|
|
# Generate the thumbnail
|
|
if t_method == "crop":
|
|
t_byte_source = yield logcontext.defer_to_thread(
|
|
self.hs.get_reactor(),
|
|
thumbnailer.crop,
|
|
t_width, t_height, t_type,
|
|
)
|
|
elif t_method == "scale":
|
|
t_byte_source = yield logcontext.defer_to_thread(
|
|
self.hs.get_reactor(),
|
|
thumbnailer.scale,
|
|
t_width, t_height, t_type,
|
|
)
|
|
else:
|
|
logger.error("Unrecognized method: %r", t_method)
|
|
continue
|
|
|
|
if not t_byte_source:
|
|
continue
|
|
|
|
try:
|
|
file_info = FileInfo(
|
|
server_name=server_name,
|
|
file_id=file_id,
|
|
thumbnail=True,
|
|
thumbnail_width=t_width,
|
|
thumbnail_height=t_height,
|
|
thumbnail_method=t_method,
|
|
thumbnail_type=t_type,
|
|
url_cache=url_cache,
|
|
)
|
|
|
|
output_path = yield self.media_storage.store_file(
|
|
t_byte_source, file_info,
|
|
)
|
|
finally:
|
|
t_byte_source.close()
|
|
|
|
t_len = os.path.getsize(output_path)
|
|
|
|
# Write to database
|
|
if server_name:
|
|
yield self.store.store_remote_media_thumbnail(
|
|
server_name, media_id, file_id,
|
|
t_width, t_height, t_type, t_method, t_len
|
|
)
|
|
else:
|
|
yield self.store.store_local_thumbnail(
|
|
media_id, t_width, t_height, t_type, t_method, t_len
|
|
)
|
|
|
|
defer.returnValue({
|
|
"width": m_width,
|
|
"height": m_height,
|
|
})
|
|
|
|
@defer.inlineCallbacks
|
|
def delete_old_remote_media(self, before_ts):
|
|
old_media = yield self.store.get_remote_media_before(before_ts)
|
|
|
|
deleted = 0
|
|
|
|
for media in old_media:
|
|
origin = media["media_origin"]
|
|
media_id = media["media_id"]
|
|
file_id = media["filesystem_id"]
|
|
key = (origin, media_id)
|
|
|
|
logger.info("Deleting: %r", key)
|
|
|
|
# TODO: Should we delete from the backup store
|
|
|
|
with (yield self.remote_media_linearizer.queue(key)):
|
|
full_path = self.filepaths.remote_media_filepath(origin, file_id)
|
|
try:
|
|
os.remove(full_path)
|
|
except OSError as e:
|
|
logger.warn("Failed to remove file: %r", full_path)
|
|
if e.errno == errno.ENOENT:
|
|
pass
|
|
else:
|
|
continue
|
|
|
|
thumbnail_dir = self.filepaths.remote_media_thumbnail_dir(
|
|
origin, file_id
|
|
)
|
|
shutil.rmtree(thumbnail_dir, ignore_errors=True)
|
|
|
|
yield self.store.delete_remote_media(origin, media_id)
|
|
deleted += 1
|
|
|
|
defer.returnValue({"deleted": deleted})
|
|
|
|
|
|
class MediaRepositoryResource(Resource):
|
|
"""File uploading and downloading.
|
|
|
|
Uploads are POSTed to a resource which returns a token which is used to GET
|
|
the download::
|
|
|
|
=> POST /_matrix/media/v1/upload HTTP/1.1
|
|
Content-Type: <media-type>
|
|
Content-Length: <content-length>
|
|
|
|
<media>
|
|
|
|
<= HTTP/1.1 200 OK
|
|
Content-Type: application/json
|
|
|
|
{ "content_uri": "mxc://<server-name>/<media-id>" }
|
|
|
|
=> GET /_matrix/media/v1/download/<server-name>/<media-id> HTTP/1.1
|
|
|
|
<= HTTP/1.1 200 OK
|
|
Content-Type: <media-type>
|
|
Content-Disposition: attachment;filename=<upload-filename>
|
|
|
|
<media>
|
|
|
|
Clients can get thumbnails by supplying a desired width and height and
|
|
thumbnailing method::
|
|
|
|
=> GET /_matrix/media/v1/thumbnail/<server_name>
|
|
/<media-id>?width=<w>&height=<h>&method=<m> HTTP/1.1
|
|
|
|
<= HTTP/1.1 200 OK
|
|
Content-Type: image/jpeg or image/png
|
|
|
|
<thumbnail>
|
|
|
|
The thumbnail methods are "crop" and "scale". "scale" trys to return an
|
|
image where either the width or the height is smaller than the requested
|
|
size. The client should then scale and letterbox the image if it needs to
|
|
fit within a given rectangle. "crop" trys to return an image where the
|
|
width and height are close to the requested size and the aspect matches
|
|
the requested size. The client should scale the image if it needs to fit
|
|
within a given rectangle.
|
|
"""
|
|
|
|
def __init__(self, hs):
|
|
Resource.__init__(self)
|
|
|
|
media_repo = hs.get_media_repository()
|
|
|
|
self.putChild(b"upload", UploadResource(hs, media_repo))
|
|
self.putChild(b"download", DownloadResource(hs, media_repo))
|
|
self.putChild(b"thumbnail", ThumbnailResource(
|
|
hs, media_repo, media_repo.media_storage,
|
|
))
|
|
if hs.config.url_preview_enabled:
|
|
self.putChild(b"preview_url", PreviewUrlResource(
|
|
hs, media_repo, media_repo.media_storage,
|
|
))
|
|
self.putChild(b"config", MediaConfigResource(hs))
|