627 lines
23 KiB
Python
627 lines
23 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 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 twisted.internet import defer, threads
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import twisted.internet.error
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import twisted.web.http
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from twisted.web.resource import Resource
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from .upload_resource import UploadResource
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from .download_resource import DownloadResource
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from .thumbnail_resource import ThumbnailResource
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from .identicon_resource import IdenticonResource
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from .preview_url_resource import PreviewUrlResource
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from .filepath import MediaFilePaths
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from .thumbnailer import Thumbnailer
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from synapse.http.matrixfederationclient import MatrixFederationHttpClient
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from synapse.util.stringutils import random_string
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from synapse.api.errors import SynapseError, HttpResponseException, \
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NotFoundError
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from synapse.util.async import Linearizer
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from synapse.util.stringutils import is_ascii
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from synapse.util.logcontext import make_deferred_yieldable, preserve_fn
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from synapse.util.retryutils import NotRetryingDestination
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import os
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import errno
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import shutil
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import cgi
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import logging
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import urlparse
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logger = logging.getLogger(__name__)
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UPDATE_RECENTLY_ACCESSED_REMOTES_TS = 60 * 1000
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class MediaRepository(object):
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def __init__(self, hs):
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self.auth = hs.get_auth()
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self.client = MatrixFederationHttpClient(hs)
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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.backup_base_path = hs.config.backup_media_store_path
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self.synchronous_backup_media_store = hs.config.synchronous_backup_media_store
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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.clock.looping_call(
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self._update_recently_accessed_remotes,
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UPDATE_RECENTLY_ACCESSED_REMOTES_TS
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)
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@defer.inlineCallbacks
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def _update_recently_accessed_remotes(self):
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media = self.recently_accessed_remotes
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self.recently_accessed_remotes = set()
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yield self.store.update_cached_last_access_time(
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media, self.clock.time_msec()
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)
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@staticmethod
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def _makedirs(filepath):
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dirname = os.path.dirname(filepath)
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if not os.path.exists(dirname):
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os.makedirs(dirname)
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@staticmethod
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def _write_file_synchronously(source, fname):
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"""Write `source` to the path `fname` synchronously. Should be called
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from a thread.
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Args:
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source: A file like object to be written
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fname (str): Path to write to
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"""
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MediaRepository._makedirs(fname)
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source.seek(0) # Ensure we read from the start of the file
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with open(fname, "wb") as f:
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shutil.copyfileobj(source, f)
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@defer.inlineCallbacks
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def write_to_file_and_backup(self, source, path):
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"""Write `source` to the on disk media store, and also the backup store
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if configured.
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Args:
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source: A file like object that should be written
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path (str): Relative path to write file to
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Returns:
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Deferred[str]: the file path written to in the primary media store
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"""
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fname = os.path.join(self.primary_base_path, path)
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# Write to the main repository
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yield make_deferred_yieldable(threads.deferToThread(
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self._write_file_synchronously, source, fname,
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))
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# Write to backup repository
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yield self.copy_to_backup(path)
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defer.returnValue(fname)
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@defer.inlineCallbacks
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def copy_to_backup(self, path):
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"""Copy a file from the primary to backup media store, if configured.
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Args:
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path(str): Relative path to write file to
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"""
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if self.backup_base_path:
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primary_fname = os.path.join(self.primary_base_path, path)
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backup_fname = os.path.join(self.backup_base_path, path)
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# We can either wait for successful writing to the backup repository
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# or write in the background and immediately return
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if self.synchronous_backup_media_store:
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yield make_deferred_yieldable(threads.deferToThread(
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shutil.copyfile, primary_fname, backup_fname,
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))
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else:
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preserve_fn(threads.deferToThread)(
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shutil.copyfile, primary_fname, backup_fname,
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)
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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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fname = yield self.write_to_file_and_backup(
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content, self.filepaths.local_media_filepath_rel(media_id)
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)
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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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media_info = {
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"media_type": media_type,
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"media_length": content_length,
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}
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yield self._generate_thumbnails(None, media_id, media_info)
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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_remote_media(self, server_name, media_id):
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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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media_info = yield self._get_remote_media_impl(server_name, media_id)
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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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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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elif media_info["quarantined_by"]:
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raise NotFoundError()
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else:
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self.recently_accessed_remotes.add((server_name, media_id))
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yield self.store.update_cached_last_access_time(
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[(server_name, media_id)], self.clock.time_msec()
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)
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defer.returnValue(media_info)
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@defer.inlineCallbacks
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def _download_remote_file(self, server_name, media_id):
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file_id = random_string(24)
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fpath = self.filepaths.remote_media_filepath_rel(
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server_name, file_id
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)
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fname = os.path.join(self.primary_base_path, fpath)
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self._makedirs(fname)
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try:
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with open(fname, "wb") as f:
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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 twisted.internet.error.DNSLookupError as e:
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logger.warn("HTTP error fetching remote media %s/%s: %r",
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server_name, media_id, e)
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raise NotFoundError()
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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 SynapseError.from_http_response_exception(e)
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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 self.copy_to_backup(fpath)
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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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content_disposition = headers.get("Content-Disposition", None)
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if content_disposition:
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_, params = cgi.parse_header(content_disposition[0],)
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upload_name = None
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# First check if there is a valid UTF-8 filename
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upload_name_utf8 = params.get("filename*", None)
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if upload_name_utf8:
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if upload_name_utf8.lower().startswith("utf-8''"):
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upload_name = upload_name_utf8[7:]
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# If there isn't check for an ascii name.
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if not upload_name:
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upload_name_ascii = params.get("filename", None)
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if upload_name_ascii and is_ascii(upload_name_ascii):
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upload_name = upload_name_ascii
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if upload_name:
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upload_name = urlparse.unquote(upload_name)
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try:
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upload_name = upload_name.decode("utf-8")
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except UnicodeDecodeError:
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upload_name = None
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else:
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upload_name = None
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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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except Exception:
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os.remove(fname)
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raise
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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, media_info
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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):
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input_path = self.filepaths.local_media_filepath(media_id)
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thumbnailer = Thumbnailer(input_path)
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t_byte_source = yield make_deferred_yieldable(threads.deferToThread(
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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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output_path = yield self.write_to_file_and_backup(
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t_byte_source,
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self.filepaths.local_media_thumbnail_rel(
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media_id, t_width, t_height, t_type, t_method
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)
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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 = self.filepaths.remote_media_filepath(server_name, file_id)
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thumbnailer = Thumbnailer(input_path)
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t_byte_source = yield make_deferred_yieldable(threads.deferToThread(
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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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output_path = yield self.write_to_file_and_backup(
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t_byte_source,
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self.filepaths.remote_media_thumbnail_rel(
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server_name, file_id, t_width, t_height, t_type, t_method
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)
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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_remote_media_thumbnail(
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server_name, media_id, file_id,
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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_thumbnails(self, server_name, media_id, media_info, url_cache=False):
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"""Generate and store thumbnails for an image.
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Args:
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server_name(str|None): The server name if remote media, else None if local
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media_id(str)
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media_info(dict)
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url_cache(bool): If we are thumbnailing images downloaded for the URL cache,
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used exclusively by the url previewer
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Returns:
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Deferred[dict]: Dict with "width" and "height" keys of original image
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"""
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media_type = media_info["media_type"]
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file_id = media_info.get("filesystem_id")
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requirements = self._get_thumbnail_requirements(media_type)
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if not requirements:
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return
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if server_name:
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input_path = self.filepaths.remote_media_filepath(server_name, file_id)
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elif url_cache:
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input_path = self.filepaths.url_cache_filepath(media_id)
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else:
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input_path = self.filepaths.local_media_filepath(media_id)
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thumbnailer = Thumbnailer(input_path)
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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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# We deduplicate the thumbnail sizes by ignoring the cropped versions if
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# they have the same dimensions of a scaled one.
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thumbnails = {}
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for r_width, r_height, r_method, r_type in requirements:
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if r_method == "crop":
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thumbnails.setdefault((r_width, r_height, r_type), r_method)
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elif r_method == "scale":
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t_width, t_height = thumbnailer.aspect(r_width, r_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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thumbnails[(t_width, t_height, r_type)] = r_method
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# Now we generate the thumbnails for each dimension, store it
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for (t_width, t_height, t_type), t_method in thumbnails.iteritems():
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# Work out the correct file name for thumbnail
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if server_name:
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file_path = self.filepaths.remote_media_thumbnail_rel(
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server_name, file_id, t_width, t_height, t_type, t_method
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)
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elif url_cache:
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file_path = self.filepaths.url_cache_thumbnail_rel(
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media_id, t_width, t_height, t_type, t_method
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)
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else:
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file_path = self.filepaths.local_media_thumbnail_rel(
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media_id, t_width, t_height, t_type, t_method
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)
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# Generate the thumbnail
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if t_method == "crop":
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t_byte_source = yield make_deferred_yieldable(threads.deferToThread(
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thumbnailer.crop,
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t_width, t_height, t_type,
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))
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elif t_method == "scale":
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t_byte_source = yield make_deferred_yieldable(threads.deferToThread(
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thumbnailer.scale,
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t_width, t_height, t_type,
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))
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else:
|
|
logger.error("Unrecognized method: %r", t_method)
|
|
continue
|
|
|
|
if not t_byte_source:
|
|
continue
|
|
|
|
try:
|
|
# Write to disk
|
|
output_path = yield self.write_to_file_and_backup(
|
|
t_byte_source, file_path,
|
|
)
|
|
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("upload", UploadResource(hs, media_repo))
|
|
self.putChild("download", DownloadResource(hs, media_repo))
|
|
self.putChild("thumbnail", ThumbnailResource(hs, media_repo))
|
|
self.putChild("identicon", IdenticonResource())
|
|
if hs.config.url_preview_enabled:
|
|
self.putChild("preview_url", PreviewUrlResource(hs, media_repo))
|