mirror of
https://git.anonymousland.org/anonymousland/synapse.git
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b312769c0e
If a file cannot be thumbnailed for some reason (e.g. the file is empty), then catch the exception and convert it to a reasonable error message for the client.
834 lines
28 KiB
Python
834 lines
28 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 typing import IO, Dict, Optional, Tuple
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import twisted.internet.error
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import twisted.web.http
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from twisted.web.http import Request
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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.config._base import ConfigError
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from synapse.logging.context import defer_to_thread
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from synapse.metrics.background_process_metrics import run_as_background_process
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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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Responder,
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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, ThumbnailError
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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:
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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, 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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async 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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await 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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async def create_content(
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self,
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media_type: str,
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upload_name: str,
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content: IO,
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content_length: int,
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auth_user: str,
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) -> str:
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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: The content type of the file
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upload_name: 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: The length of the content
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auth_user: The user_id of the uploader
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Returns:
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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(server_name=None, file_id=media_id)
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fname = await 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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await 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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await self._generate_thumbnails(None, media_id, media_id, media_type)
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return "mxc://%s/%s" % (self.server_name, media_id)
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async def get_local_media(
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self, request: Request, media_id: str, name: Optional[str]
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) -> None:
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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: The incoming request.
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media_id: 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: 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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Resolves once a response has successfully been written to request
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"""
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media_info = await 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(None, media_id, url_cache=url_cache)
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responder = await self.media_storage.fetch_media(file_info)
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await respond_with_responder(
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request, responder, media_type, media_length, upload_name
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)
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async def get_remote_media(
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self, request: Request, server_name: str, media_id: str, name: Optional[str]
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) -> None:
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"""Respond to requests for remote media.
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Args:
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request: The incoming request.
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server_name: Remote server_name where the media originated.
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media_id: The media ID of the content (as defined by the remote server).
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name: 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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Resolves once a response has successfully been written to request
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"""
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if (
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self.federation_domain_whitelist is not None
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and 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 (await self.remote_media_linearizer.queue(key)):
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responder, media_info = await 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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await 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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async def get_remote_media_info(self, server_name: str, media_id: str) -> dict:
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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: Remote server_name where the media originated.
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media_id: The media ID of the content (as defined by the remote server).
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Returns:
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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
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and 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 (await self.remote_media_linearizer.queue(key)):
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responder, media_info = await 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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return media_info
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async def _get_remote_media_impl(
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self, server_name: str, media_id: str
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) -> Tuple[Optional[Responder], dict]:
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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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A tuple of responder and the media info of the file.
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"""
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media_info = await self.store.get_cached_remote_media(server_name, media_id)
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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 = await self.media_storage.fetch_media(file_info)
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if responder:
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return responder, media_info
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# Failed to find the file anywhere, lets download it.
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media_info = await self._download_remote_file(server_name, media_id, file_id)
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responder = await self.media_storage.fetch_media(file_info)
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return responder, media_info
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async def _download_remote_file(
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self, server_name: str, media_id: str, file_id: str
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) -> dict:
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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: Originating server
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media_id: 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: Local file ID
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Returns:
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The media info of the file.
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"""
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file_info = FileInfo(server_name=server_name, file_id=file_id)
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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/r0/download", server_name, media_id)
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)
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try:
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length, headers = await self.client.get_file(
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server_name,
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request_path,
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output_stream=f,
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max_size=self.max_upload_size,
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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.warning(
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"Request failed fetching remote media %s/%s: %r",
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server_name,
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media_id,
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e,
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)
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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.warning(
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"HTTP error fetching remote media %s/%s: %s",
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server_name,
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media_id,
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e.response,
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)
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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.warning(
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"Failed to fetch remote media %s/%s", server_name, media_id
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)
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raise
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except NotRetryingDestination:
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logger.warning("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(
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"Failed to fetch remote media %s/%s", server_name, media_id
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)
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raise SynapseError(502, "Failed to fetch remote media")
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await 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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await 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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await self._generate_thumbnails(server_name, media_id, file_id, media_type)
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return 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, 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,
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m_height,
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self.max_image_pixels,
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)
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return
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if thumbnailer.transpose_method is not None:
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m_width, m_height = thumbnailer.transpose()
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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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|
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async def generate_local_exact_thumbnail(
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self,
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media_id: str,
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t_width: int,
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t_height: int,
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t_method: str,
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t_type: str,
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url_cache: str,
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) -> Optional[str]:
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input_path = await self.media_storage.ensure_media_is_in_local_cache(
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FileInfo(None, media_id, url_cache=url_cache)
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)
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try:
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thumbnailer = Thumbnailer(input_path)
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except ThumbnailError as e:
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logger.warning(
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"Unable to generate a thumbnail for local media %s using a method of %s and type of %s: %s",
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media_id,
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t_method,
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t_type,
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e,
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)
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return None
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t_byte_source = await defer_to_thread(
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self.hs.get_reactor(),
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self._generate_thumbnail,
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thumbnailer,
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t_width,
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t_height,
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t_method,
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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 = await 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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await 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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)
|
|
|
|
return output_path
|
|
|
|
# Could not generate thumbnail.
|
|
return None
|
|
|
|
async def generate_remote_exact_thumbnail(
|
|
self,
|
|
server_name: str,
|
|
file_id: str,
|
|
media_id: str,
|
|
t_width: int,
|
|
t_height: int,
|
|
t_method: str,
|
|
t_type: str,
|
|
) -> Optional[str]:
|
|
input_path = await self.media_storage.ensure_media_is_in_local_cache(
|
|
FileInfo(server_name, file_id, url_cache=False)
|
|
)
|
|
|
|
try:
|
|
thumbnailer = Thumbnailer(input_path)
|
|
except ThumbnailError as e:
|
|
logger.warning(
|
|
"Unable to generate a thumbnail for remote media %s from %s using a method of %s and type of %s: %s",
|
|
media_id,
|
|
server_name,
|
|
t_method,
|
|
t_type,
|
|
e,
|
|
)
|
|
return None
|
|
|
|
t_byte_source = await 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=file_id,
|
|
thumbnail=True,
|
|
thumbnail_width=t_width,
|
|
thumbnail_height=t_height,
|
|
thumbnail_method=t_method,
|
|
thumbnail_type=t_type,
|
|
)
|
|
|
|
output_path = await 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)
|
|
|
|
await self.store.store_remote_media_thumbnail(
|
|
server_name,
|
|
media_id,
|
|
file_id,
|
|
t_width,
|
|
t_height,
|
|
t_type,
|
|
t_method,
|
|
t_len,
|
|
)
|
|
|
|
return output_path
|
|
|
|
# Could not generate thumbnail.
|
|
return None
|
|
|
|
async def _generate_thumbnails(
|
|
self,
|
|
server_name: Optional[str],
|
|
media_id: str,
|
|
file_id: str,
|
|
media_type: str,
|
|
url_cache: bool = False,
|
|
) -> Optional[dict]:
|
|
"""Generate and store thumbnails for an image.
|
|
|
|
Args:
|
|
server_name: The server name if remote media, else None if local
|
|
media_id: The media ID of the content. (This is the same as
|
|
the file_id for local content)
|
|
file_id: Local file ID
|
|
media_type: The content type of the file
|
|
url_cache: If we are thumbnailing images downloaded for the URL cache,
|
|
used exclusively by the url previewer
|
|
|
|
Returns:
|
|
Dict with "width" and "height" keys of original image or None if the
|
|
media cannot be thumbnailed.
|
|
"""
|
|
requirements = self._get_thumbnail_requirements(media_type)
|
|
if not requirements:
|
|
return None
|
|
|
|
input_path = await self.media_storage.ensure_media_is_in_local_cache(
|
|
FileInfo(server_name, file_id, url_cache=url_cache)
|
|
)
|
|
|
|
try:
|
|
thumbnailer = Thumbnailer(input_path)
|
|
except ThumbnailError as e:
|
|
logger.warning(
|
|
"Unable to generate thumbnails for remote media %s from %s using a method of %s and type of %s: %s",
|
|
media_id,
|
|
server_name,
|
|
media_type,
|
|
e,
|
|
)
|
|
return None
|
|
|
|
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 None
|
|
|
|
if thumbnailer.transpose_method is not None:
|
|
m_width, m_height = await defer_to_thread(
|
|
self.hs.get_reactor(), thumbnailer.transpose
|
|
)
|
|
|
|
# We deduplicate the thumbnail sizes by ignoring the cropped versions if
|
|
# they have the same dimensions of a scaled one.
|
|
thumbnails = {} # type: Dict[Tuple[int, int, str], str]
|
|
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 thumbnails.items():
|
|
# Generate the thumbnail
|
|
if t_method == "crop":
|
|
t_byte_source = await defer_to_thread(
|
|
self.hs.get_reactor(), thumbnailer.crop, t_width, t_height, t_type
|
|
)
|
|
elif t_method == "scale":
|
|
t_byte_source = await 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 = await 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:
|
|
await self.store.store_remote_media_thumbnail(
|
|
server_name,
|
|
media_id,
|
|
file_id,
|
|
t_width,
|
|
t_height,
|
|
t_type,
|
|
t_method,
|
|
t_len,
|
|
)
|
|
else:
|
|
await self.store.store_local_thumbnail(
|
|
media_id, t_width, t_height, t_type, t_method, t_len
|
|
)
|
|
|
|
return {"width": m_width, "height": m_height}
|
|
|
|
async def delete_old_remote_media(self, before_ts):
|
|
old_media = await 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 (await 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.warning("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)
|
|
|
|
await self.store.delete_remote_media(origin, media_id)
|
|
deleted += 1
|
|
|
|
return {"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/r0/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/r0/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/r0/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):
|
|
# If we're not configured to use it, raise if we somehow got here.
|
|
if not hs.config.can_load_media_repo:
|
|
raise ConfigError("Synapse is not configured to use a media repo.")
|
|
|
|
super().__init__()
|
|
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))
|