diff options
| -rw-r--r-- | synapse/rest/media/v1/_base.py | 144 | ||||
| -rw-r--r-- | synapse/rest/media/v1/download_resource.py | 75 | ||||
| -rw-r--r-- | synapse/rest/media/v1/media_repository.py | 485 | ||||
| -rw-r--r-- | synapse/rest/media/v1/media_storage.py | 228 | ||||
| -rw-r--r-- | synapse/rest/media/v1/preview_url_resource.py | 18 | ||||
| -rw-r--r-- | synapse/rest/media/v1/storage_provider.py | 127 | ||||
| -rw-r--r-- | synapse/rest/media/v1/thumbnail_resource.py | 112 |
7 files changed, 843 insertions, 346 deletions
diff --git a/synapse/rest/media/v1/_base.py b/synapse/rest/media/v1/_base.py index 95fa95fce3..e7ac01da01 100644 --- a/synapse/rest/media/v1/_base.py +++ b/synapse/rest/media/v1/_base.py @@ -70,38 +70,11 @@ def respond_with_file(request, media_type, file_path, logger.debug("Responding with %r", file_path) if os.path.isfile(file_path): - request.setHeader(b"Content-Type", media_type.encode("UTF-8")) - if upload_name: - if is_ascii(upload_name): - request.setHeader( - b"Content-Disposition", - b"inline; filename=%s" % ( - urllib.quote(upload_name.encode("utf-8")), - ), - ) - else: - request.setHeader( - b"Content-Disposition", - b"inline; filename*=utf-8''%s" % ( - urllib.quote(upload_name.encode("utf-8")), - ), - ) - - # cache for at least a day. - # XXX: we might want to turn this off for data we don't want to - # recommend caching as it's sensitive or private - or at least - # select private. don't bother setting Expires as all our - # clients are smart enough to be happy with Cache-Control - request.setHeader( - b"Cache-Control", b"public,max-age=86400,s-maxage=86400" - ) if file_size is None: stat = os.stat(file_path) file_size = stat.st_size - request.setHeader( - b"Content-Length", b"%d" % (file_size,) - ) + add_file_headers(request, media_type, file_size, upload_name) with open(file_path, "rb") as f: yield logcontext.make_deferred_yieldable( @@ -111,3 +84,118 @@ def respond_with_file(request, media_type, file_path, finish_request(request) else: respond_404(request) + + +def add_file_headers(request, media_type, file_size, upload_name): + """Adds the correct response headers in preparation for responding with the + media. + + Args: + request (twisted.web.http.Request) + media_type (str): The media/content type. + file_size (int): Size in bytes of the media, if known. + upload_name (str): The name of the requested file, if any. + """ + request.setHeader(b"Content-Type", media_type.encode("UTF-8")) + if upload_name: + if is_ascii(upload_name): + request.setHeader( + b"Content-Disposition", + b"inline; filename=%s" % ( + urllib.quote(upload_name.encode("utf-8")), + ), + ) + else: + request.setHeader( + b"Content-Disposition", + b"inline; filename*=utf-8''%s" % ( + urllib.quote(upload_name.encode("utf-8")), + ), + ) + + # cache for at least a day. + # XXX: we might want to turn this off for data we don't want to + # recommend caching as it's sensitive or private - or at least + # select private. don't bother setting Expires as all our + # clients are smart enough to be happy with Cache-Control + request.setHeader( + b"Cache-Control", b"public,max-age=86400,s-maxage=86400" + ) + + request.setHeader( + b"Content-Length", b"%d" % (file_size,) + ) + + +@defer.inlineCallbacks +def respond_with_responder(request, responder, media_type, file_size, upload_name=None): + """Responds to the request with given responder. If responder is None then + returns 404. + + Args: + request (twisted.web.http.Request) + responder (Responder|None) + media_type (str): The media/content type. + file_size (int|None): Size in bytes of the media. If not known it should be None + upload_name (str|None): The name of the requested file, if any. + """ + if not responder: + respond_404(request) + return + + add_file_headers(request, media_type, file_size, upload_name) + with responder: + yield responder.write_to_consumer(request) + finish_request(request) + + +class Responder(object): + """Represents a response that can be streamed to the requester. + + Responder is a context manager which *must* be used, so that any resources + held can be cleaned up. + """ + def write_to_consumer(self, consumer): + """Stream response into consumer + + Args: + consumer (IConsumer) + + Returns: + Deferred: Resolves once the response has finished being written + """ + pass + + def __enter__(self): + pass + + def __exit__(self, exc_type, exc_val, exc_tb): + pass + + +class FileInfo(object): + """Details about a requested/uploaded file. + + Attributes: + server_name (str): The server name where the media originated from, + or None if local. + file_id (str): The local ID of the file. For local files this is the + same as the media_id + url_cache (bool): If the file is for the url preview cache + thumbnail (bool): Whether the file is a thumbnail or not. + thumbnail_width (int) + thumbnail_height (int) + thumbnail_method (str) + thumbnail_type (str): Content type of thumbnail, e.g. image/png + """ + def __init__(self, server_name, file_id, url_cache=False, + thumbnail=False, thumbnail_width=None, thumbnail_height=None, + thumbnail_method=None, thumbnail_type=None): + self.server_name = server_name + self.file_id = file_id + self.url_cache = url_cache + self.thumbnail = thumbnail + self.thumbnail_width = thumbnail_width + self.thumbnail_height = thumbnail_height + self.thumbnail_method = thumbnail_method + self.thumbnail_type = thumbnail_type diff --git a/synapse/rest/media/v1/download_resource.py b/synapse/rest/media/v1/download_resource.py index 6879249c8a..fe7e17596f 100644 --- a/synapse/rest/media/v1/download_resource.py +++ b/synapse/rest/media/v1/download_resource.py @@ -14,7 +14,7 @@ # limitations under the License. import synapse.http.servlet -from ._base import parse_media_id, respond_with_file, respond_404 +from ._base import parse_media_id, respond_404 from twisted.web.resource import Resource from synapse.http.server import request_handler, set_cors_headers @@ -32,12 +32,12 @@ class DownloadResource(Resource): def __init__(self, hs, media_repo): Resource.__init__(self) - self.filepaths = media_repo.filepaths self.media_repo = media_repo self.server_name = hs.hostname - self.store = hs.get_datastore() - self.version_string = hs.version_string + + # Both of these are expected by @request_handler() self.clock = hs.get_clock() + self.version_string = hs.version_string def render_GET(self, request): self._async_render_GET(request) @@ -57,59 +57,16 @@ class DownloadResource(Resource): ) server_name, media_id, name = parse_media_id(request) if server_name == self.server_name: - yield self._respond_local_file(request, media_id, name) + yield self.media_repo.get_local_media(request, media_id, name) else: - yield self._respond_remote_file( - request, server_name, media_id, name - ) - - @defer.inlineCallbacks - def _respond_local_file(self, request, media_id, name): - media_info = yield self.store.get_local_media(media_id) - if not media_info or media_info["quarantined_by"]: - respond_404(request) - return - - media_type = media_info["media_type"] - media_length = media_info["media_length"] - upload_name = name if name else media_info["upload_name"] - if media_info["url_cache"]: - # TODO: Check the file still exists, if it doesn't we can redownload - # it from the url `media_info["url_cache"]` - file_path = self.filepaths.url_cache_filepath(media_id) - else: - file_path = self.filepaths.local_media_filepath(media_id) - - yield respond_with_file( - request, media_type, file_path, media_length, - upload_name=upload_name, - ) - - @defer.inlineCallbacks - def _respond_remote_file(self, request, server_name, media_id, name): - # don't forward requests for remote media if allow_remote is false - allow_remote = synapse.http.servlet.parse_boolean( - request, "allow_remote", default=True) - if not allow_remote: - logger.info( - "Rejecting request for remote media %s/%s due to allow_remote", - server_name, media_id, - ) - respond_404(request) - return - - media_info = yield self.media_repo.get_remote_media(server_name, media_id) - - media_type = media_info["media_type"] - media_length = media_info["media_length"] - filesystem_id = media_info["filesystem_id"] - upload_name = name if name else media_info["upload_name"] - - file_path = self.filepaths.remote_media_filepath( - server_name, filesystem_id - ) - - yield respond_with_file( - request, media_type, file_path, media_length, - upload_name=upload_name, - ) + allow_remote = synapse.http.servlet.parse_boolean( + request, "allow_remote", default=True) + if not allow_remote: + logger.info( + "Rejecting request for remote media %s/%s due to allow_remote", + server_name, media_id, + ) + respond_404(request) + return + + yield self.media_repo.get_remote_media(request, server_name, media_id, name) diff --git a/synapse/rest/media/v1/media_repository.py b/synapse/rest/media/v1/media_repository.py index eed9056a2f..45bc534200 100644 --- a/synapse/rest/media/v1/media_repository.py +++ b/synapse/rest/media/v1/media_repository.py @@ -1,5 +1,6 @@ # -*- coding: utf-8 -*- # Copyright 2014-2016 OpenMarket Ltd +# Copyright 2018 New Vector Ltd # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -18,6 +19,7 @@ import twisted.internet.error import twisted.web.http from twisted.web.resource import Resource +from ._base import respond_404, FileInfo, respond_with_responder from .upload_resource import UploadResource from .download_resource import DownloadResource from .thumbnail_resource import ThumbnailResource @@ -25,6 +27,10 @@ from .identicon_resource import IdenticonResource from .preview_url_resource import PreviewUrlResource from .filepath import MediaFilePaths from .thumbnailer import Thumbnailer +from .storage_provider import ( + StorageProviderWrapper, FileStorageProviderBackend, +) +from .media_storage import MediaStorage from synapse.http.matrixfederationclient import MatrixFederationHttpClient from synapse.util.stringutils import random_string @@ -33,7 +39,7 @@ from synapse.api.errors import SynapseError, HttpResponseException, \ from synapse.util.async import Linearizer from synapse.util.stringutils import is_ascii -from synapse.util.logcontext import make_deferred_yieldable, preserve_fn +from synapse.util.logcontext import make_deferred_yieldable from synapse.util.retryutils import NotRetryingDestination import os @@ -63,10 +69,6 @@ class MediaRepository(object): self.primary_base_path = hs.config.media_store_path self.filepaths = MediaFilePaths(self.primary_base_path) - self.backup_base_path = hs.config.backup_media_store_path - - self.synchronous_backup_media_store = hs.config.synchronous_backup_media_store - self.dynamic_thumbnails = hs.config.dynamic_thumbnails self.thumbnail_requirements = hs.config.thumbnail_requirements @@ -74,6 +76,28 @@ class MediaRepository(object): self.recently_accessed_remotes = set() + # List of StorageProviders where we should search for media and + # potentially upload to. + storage_providers = [] + + # TODO: Move this into config and allow other storage providers to be + # defined. + if hs.config.backup_media_store_path: + backend = FileStorageProviderBackend( + self.primary_base_path, hs.config.backup_media_store_path, + ) + provider = StorageProviderWrapper( + backend, + store=True, + store_synchronous=hs.config.synchronous_backup_media_store, + store_remote=True, + ) + storage_providers.append(provider) + + self.media_storage = MediaStorage( + self.primary_base_path, self.filepaths, storage_providers, + ) + self.clock.looping_call( self._update_recently_accessed_remotes, UPDATE_RECENTLY_ACCESSED_REMOTES_TS @@ -88,72 +112,6 @@ class MediaRepository(object): media, self.clock.time_msec() ) - @staticmethod - def _makedirs(filepath): - dirname = os.path.dirname(filepath) - if not os.path.exists(dirname): - os.makedirs(dirname) - - @staticmethod - def _write_file_synchronously(source, fname): - """Write `source` to the path `fname` synchronously. Should be called - from a thread. - - Args: - source: A file like object to be written - fname (str): Path to write to - """ - MediaRepository._makedirs(fname) - source.seek(0) # Ensure we read from the start of the file - with open(fname, "wb") as f: - shutil.copyfileobj(source, f) - - @defer.inlineCallbacks - def write_to_file_and_backup(self, source, path): - """Write `source` to the on disk media store, and also the backup store - if configured. - - Args: - source: A file like object that should be written - path (str): Relative path to write file to - - Returns: - Deferred[str]: the file path written to in the primary media store - """ - fname = os.path.join(self.primary_base_path, path) - - # Write to the main repository - yield make_deferred_yieldable(threads.deferToThread( - self._write_file_synchronously, source, fname, - )) - - # Write to backup repository - yield self.copy_to_backup(path) - - defer.returnValue(fname) - - @defer.inlineCallbacks - def copy_to_backup(self, path): - """Copy a file from the primary to backup media store, if configured. - - Args: - path(str): Relative path to write file to - """ - if self.backup_base_path: - primary_fname = os.path.join(self.primary_base_path, path) - backup_fname = os.path.join(self.backup_base_path, path) - - # We can either wait for successful writing to the backup repository - # or write in the background and immediately return - if self.synchronous_backup_media_store: - yield make_deferred_yieldable(threads.deferToThread( - shutil.copyfile, primary_fname, backup_fname, - )) - else: - preserve_fn(threads.deferToThread)( - shutil.copyfile, primary_fname, backup_fname, - ) - @defer.inlineCallbacks def create_content(self, media_type, upload_name, content, content_length, auth_user): @@ -171,10 +129,13 @@ class MediaRepository(object): """ media_id = random_string(24) - fname = yield self.write_to_file_and_backup( - content, self.filepaths.local_media_filepath_rel(media_id) + file_info = FileInfo( + server_name=None, + file_id=media_id, ) + fname = yield self.media_storage.store_file(content, file_info) + logger.info("Stored local media in file %r", fname) yield self.store.store_local_media( @@ -195,124 +156,224 @@ class MediaRepository(object): defer.returnValue("mxc://%s/%s" % (self.server_name, media_id)) @defer.inlineCallbacks - def get_remote_media(self, server_name, media_id): + def get_local_media(self, request, media_id, name): + """Responds to reqests for local media, if exists, or returns 404. + + Args: + request(twisted.web.http.Request) + media_id (str): The media ID of the content. (This is the same as + the file_id for local content.) + name (str|None): Optional name that, if specified, will be used as + the filename in the Content-Disposition header of the response. + + Returns: + Deferred: Resolves once a response has successfully been written + to request + """ + media_info = yield self.store.get_local_media(media_id) + if not media_info or media_info["quarantined_by"]: + respond_404(request) + return + + media_type = media_info["media_type"] + media_length = media_info["media_length"] + upload_name = name if name else media_info["upload_name"] + url_cache = media_info["url_cache"] + + file_info = FileInfo( + None, media_id, + url_cache=url_cache, + ) + + responder = yield self.media_storage.fetch_media(file_info) + yield respond_with_responder( + request, responder, media_type, media_length, upload_name, + ) + + @defer.inlineCallbacks + def get_remote_media(self, request, server_name, media_id, name): + """Respond to requests for remote media. + + Args: + request(twisted.web.http.Request) + server_name (str): Remote server_name where the media originated. + media_id (str): The media ID of the content (as defined by the + remote server). + name (str|None): Optional name that, if specified, will be used as + the filename in the Content-Disposition header of the response. + + Returns: + Deferred: Resolves once a response has successfully been written + to request + """ + self.recently_accessed_remotes.add((server_name, media_id)) + + # We linearize here to ensure that we don't try and download remote + # media multiple times concurrently key = (server_name, media_id) with (yield self.remote_media_linearizer.queue(key)): - media_info = yield self._get_remote_media_impl(server_name, media_id) - defer.returnValue(media_info) + responder, media_info = yield self._get_remote_media_impl( + server_name, media_id, + ) + + # We deliberately stream the file outside the lock + if responder: + media_type = media_info["media_type"] + media_length = media_info["media_length"] + upload_name = name if name else media_info["upload_name"] + yield respond_with_responder( + request, responder, media_type, media_length, upload_name, + ) + else: + respond_404(request) @defer.inlineCallbacks def _get_remote_media_impl(self, server_name, media_id): + """Looks for media in local cache, if not there then attempt to + download from remote server. + + Args: + server_name (str): Remote server_name where the media originated. + media_id (str): The media ID of the content (as defined by the + remote server). + + Returns: + Deferred[(Responder, media_info)] + """ media_info = yield self.store.get_cached_remote_media( server_name, media_id ) - if not media_info: - media_info = yield self._download_remote_file( - server_name, media_id - ) - elif media_info["quarantined_by"]: - raise NotFoundError() + + # file_id is the ID we use to track the file locally. If we've already + # seen the file then reuse the existing ID, otherwise genereate a new + # one. + if media_info: + file_id = media_info["filesystem_id"] else: - self.recently_accessed_remotes.add((server_name, media_id)) - yield self.store.update_cached_last_access_time( - [(server_name, media_id)], self.clock.time_msec() - ) - defer.returnValue(media_info) + file_id = random_string(24) + + file_info = FileInfo(server_name, file_id) + + # If we have an entry in the DB, try and look for it + if media_info: + if media_info["quarantined_by"]: + raise NotFoundError() + + responder = yield self.media_storage.fetch_media(file_info) + if responder: + defer.returnValue((responder, media_info)) + + # Failed to find the file anywhere, lets download it. + + media_info = yield self._download_remote_file( + server_name, media_id, file_id + ) + + responder = yield self.media_storage.fetch_media(file_info) + defer.returnValue((responder, media_info)) @defer.inlineCallbacks - def _download_remote_file(self, server_name, media_id): - file_id = random_string(24) + def _download_remote_file(self, server_name, media_id, file_id): + """Attempt to download the remote file from the given server name, + using the given file_id as the local id. + + Args: + server_name (str): Originating server + media_id (str): The media ID of the content (as defined by the + remote server). This is different than the file_id, which is + locally generated. + file_id (str): Local file ID + + Returns: + Deferred[MediaInfo] + """ - fpath = self.filepaths.remote_media_filepath_rel( - server_name, file_id + file_info = FileInfo( + server_name=server_name, + file_id=file_id, ) - fname = os.path.join(self.primary_base_path, fpath) - self._makedirs(fname) - try: - with open(fname, "wb") as f: - request_path = "/".join(( - "/_matrix/media/v1/download", server_name, media_id, - )) + with self.media_storage.store_into_file(file_info) as (f, fname, finish): + request_path = "/".join(( + "/_matrix/media/v1/download", server_name, media_id, + )) + try: + length, headers = yield self.client.get_file( + server_name, request_path, output_stream=f, + max_size=self.max_upload_size, args={ + # tell the remote server to 404 if it doesn't + # recognise the server_name, to make sure we don't + # end up with a routing loop. + "allow_remote": "false", + } + ) + except twisted.internet.error.DNSLookupError as e: + logger.warn("HTTP error fetching remote media %s/%s: %r", + server_name, media_id, e) + raise NotFoundError() + + except HttpResponseException as e: + logger.warn("HTTP error fetching remote media %s/%s: %s", + server_name, media_id, e.response) + if e.code == twisted.web.http.NOT_FOUND: + raise SynapseError.from_http_response_exception(e) + raise SynapseError(502, "Failed to fetch remote media") + + except SynapseError: + logger.exception("Failed to fetch remote media %s/%s", + server_name, media_id) + raise + except NotRetryingDestination: + logger.warn("Not retrying destination %r", server_name) + raise SynapseError(502, "Failed to fetch remote media") + except Exception: + logger.exception("Failed to fetch remote media %s/%s", + server_name, media_id) + raise SynapseError(502, "Failed to fetch remote media") + + yield finish() + + media_type = headers["Content-Type"][0] + + time_now_ms = self.clock.time_msec() + + content_disposition = headers.get("Content-Disposition", None) + if content_disposition: + _, params = cgi.parse_header(content_disposition[0],) + upload_name = None + + # First check if there is a valid UTF-8 filename + upload_name_utf8 = params.get("filename*", None) + if upload_name_utf8: + if upload_name_utf8.lower().startswith("utf-8''"): + upload_name = upload_name_utf8[7:] + + # If there isn't check for an ascii name. + if not upload_name: + upload_name_ascii = params.get("filename", None) + if upload_name_ascii and is_ascii(upload_name_ascii): + upload_name = upload_name_ascii + + if upload_name: + upload_name = urlparse.unquote(upload_name) try: - length, headers = yield self.client.get_file( - server_name, request_path, output_stream=f, - max_size=self.max_upload_size, args={ - # tell the remote server to 404 if it doesn't - # recognise the server_name, to make sure we don't - # end up with a routing loop. - "allow_remote": "false", - } - ) - except twisted.internet.error.DNSLookupError as e: - logger.warn("HTTP error fetching remote media %s/%s: %r", - server_name, media_id, e) - raise NotFoundError() - - except HttpResponseException as e: - logger.warn("HTTP error fetching remote media %s/%s: %s", - server_name, media_id, e.response) - if e.code == twisted.web.http.NOT_FOUND: - raise SynapseError.from_http_response_exception(e) - raise SynapseError(502, "Failed to fetch remote media") - - except SynapseError: - logger.exception("Failed to fetch remote media %s/%s", - server_name, media_id) - raise - except NotRetryingDestination: - logger.warn("Not retrying destination %r", server_name) - raise SynapseError(502, "Failed to fetch remote media") - except Exception: - logger.exception("Failed to fetch remote media %s/%s", - server_name, media_id) - raise SynapseError(502, "Failed to fetch remote media") - - yield self.copy_to_backup(fpath) - - media_type = headers["Content-Type"][0] - time_now_ms = self.clock.time_msec() - - content_disposition = headers.get("Content-Disposition", None) - if content_disposition: - _, params = cgi.parse_header(content_disposition[0],) - upload_name = None - - # First check if there is a valid UTF-8 filename - upload_name_utf8 = params.get("filename*", None) - if upload_name_utf8: - if upload_name_utf8.lower().startswith("utf-8''"): - upload_name = upload_name_utf8[7:] - - # If there isn't check for an ascii name. - if not upload_name: - upload_name_ascii = params.get("filename", None) - if upload_name_ascii and is_ascii(upload_name_ascii): - upload_name = upload_name_ascii - - if upload_name: - upload_name = urlparse.unquote(upload_name) - try: - upload_name = upload_name.decode("utf-8") - except UnicodeDecodeError: - upload_name = None - else: - upload_name = None - - logger.info("Stored remote media in file %r", fname) - - yield self.store.store_cached_remote_media( - origin=server_name, - media_id=media_id, - media_type=media_type, - time_now_ms=self.clock.time_msec(), - upload_name=upload_name, - media_length=length, - filesystem_id=file_id, - ) - except Exception: - os.remove(fname) - raise + upload_name = upload_name.decode("utf-8") + except UnicodeDecodeError: + upload_name = None + else: + upload_name = None + + logger.info("Stored remote media in file %r", fname) + + yield self.store.store_cached_remote_media( + origin=server_name, + media_id=media_id, + media_type=media_type, + time_now_ms=self.clock.time_msec(), + upload_name=upload_name, + media_length=length, + filesystem_id=file_id, + ) media_info = { "media_type": media_type, @@ -368,11 +429,18 @@ class MediaRepository(object): if t_byte_source: try: - output_path = yield self.write_to_file_and_backup( - t_byte_source, - self.filepaths.local_media_thumbnail_rel( - media_id, t_width, t_height, t_type, t_method - ) + file_info = FileInfo( + server_name=None, + 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() @@ -400,11 +468,18 @@ class MediaRepository(object): if t_byte_source: try: - output_path = yield self.write_to_file_and_backup( - t_byte_source, - self.filepaths.remote_media_thumbnail_rel( - server_name, file_id, t_width, t_height, t_type, t_method - ) + 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() @@ -472,20 +547,6 @@ class MediaRepository(object): # Now we generate the thumbnails for each dimension, store it for (t_width, t_height, t_type), t_method in thumbnails.iteritems(): - # Work out the correct file name for thumbnail - if server_name: - file_path = self.filepaths.remote_media_thumbnail_rel( - server_name, file_id, t_width, t_height, t_type, t_method - ) - elif url_cache: - file_path = self.filepaths.url_cache_thumbnail_rel( - media_id, t_width, t_height, t_type, t_method - ) - else: - file_path = self.filepaths.local_media_thumbnail_rel( - media_id, t_width, t_height, t_type, t_method - ) - # Generate the thumbnail if t_method == "crop": t_byte_source = yield make_deferred_yieldable(threads.deferToThread( @@ -505,9 +566,19 @@ class MediaRepository(object): continue try: - # Write to disk - output_path = yield self.write_to_file_and_backup( - t_byte_source, file_path, + 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, + url_cache=url_cache, + ) + + output_path = yield self.media_storage.store_file( + t_byte_source, file_info, ) finally: t_byte_source.close() @@ -620,7 +691,11 @@ class MediaRepositoryResource(Resource): self.putChild("upload", UploadResource(hs, media_repo)) self.putChild("download", DownloadResource(hs, media_repo)) - self.putChild("thumbnail", ThumbnailResource(hs, media_repo)) + self.putChild("thumbnail", ThumbnailResource( + hs, media_repo, media_repo.media_storage, + )) self.putChild("identicon", IdenticonResource()) if hs.config.url_preview_enabled: - self.putChild("preview_url", PreviewUrlResource(hs, media_repo)) + self.putChild("preview_url", PreviewUrlResource( + hs, media_repo, media_repo.media_storage, + )) diff --git a/synapse/rest/media/v1/media_storage.py b/synapse/rest/media/v1/media_storage.py new file mode 100644 index 0000000000..001e84578e --- /dev/null +++ b/synapse/rest/media/v1/media_storage.py @@ -0,0 +1,228 @@ +# -*- coding: utf-8 -*- +# Copyright 2018 New Vecotr Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +from twisted.internet import defer, threads +from twisted.protocols.basic import FileSender + +from ._base import Responder + +from synapse.util.logcontext import make_deferred_yieldable + +import contextlib +import os +import logging +import shutil +import sys + +logger = logging.getLogger(__name__) + + +class MediaStorage(object): + """Responsible for storing/fetching files from local sources. + + Args: + local_media_directory (str): Base path where we store media on disk + filepaths (MediaFilePaths) + storage_providers ([StorageProvider]): List of StorageProvider that are + used to fetch and store files. + """ + + def __init__(self, local_media_directory, filepaths, storage_providers): + self.local_media_directory = local_media_directory + self.filepaths = filepaths + self.storage_providers = storage_providers + + @defer.inlineCallbacks + def store_file(self, source, file_info): + """Write `source` to the on disk media store, and also any other + configured storage providers + + Args: + source: A file like object that should be written + file_info (FileInfo): Info about the file to store + + Returns: + Deferred[str]: the file path written to in the primary media store + """ + path = self._file_info_to_path(file_info) + fname = os.path.join(self.local_media_directory, path) + + dirname = os.path.dirname(fname) + if not os.path.exists(dirname): + os.makedirs(dirname) + + # Write to the main repository + yield make_deferred_yieldable(threads.deferToThread( + _write_file_synchronously, source, fname, + )) + + defer.returnValue(fname) + + @contextlib.contextmanager + def store_into_file(self, file_info): + """Context manager used to get a file like object to write into, as + described by file_info. + + Actually yields a 3-tuple (file, fname, finish_cb), where file is a file + like object that can be written to, fname is the absolute path of file + on disk, and finish_cb is a function that returns a Deferred. + + fname can be used to read the contents from after upload, e.g. to + generate thumbnails. + + finish_cb must be called and waited on after the file has been + successfully been written to. Should not be called if there was an + error. + + Args: + file_info (FileInfo): Info about the file to store + + Example: + + with media_storage.store_into_file(info) as (f, fname, finish_cb): + # .. write into f ... + yield finish_cb() + """ + + path = self._file_info_to_path(file_info) + fname = os.path.join(self.local_media_directory, path) + + dirname = os.path.dirname(fname) + if not os.path.exists(dirname): + os.makedirs(dirname) + + finished_called = [False] + + @defer.inlineCallbacks + def finish(): + for provider in self.storage_providers: + yield provider.store_file(path, file_info) + + finished_called[0] = True + + try: + with open(fname, "wb") as f: + yield f, fname, finish + except Exception: + t, v, tb = sys.exc_info() + try: + os.remove(fname) + except Exception: + pass + raise t, v, tb + + if not finished_called: + raise Exception("Finished callback not called") + + @defer.inlineCallbacks + def fetch_media(self, file_info): + """Attempts to fetch media described by file_info from the local cache + and configured storage providers. + + Args: + file_info (FileInfo) + + Returns: + Deferred[Responder|None]: Returns a Responder if the file was found, + otherwise None. + """ + + path = self._file_info_to_path(file_info) + local_path = os.path.join(self.local_media_directory, path) + if os.path.exists(local_path): + defer.returnValue(FileResponder(open(local_path, "rb"))) + + for provider in self.storage_providers: + res = yield provider.fetch(path, file_info) + if res: + defer.returnValue(res) + + defer.returnValue(None) + + def _file_info_to_path(self, file_info): + """Converts file_info into a relative path. + + The path is suitable for storing files under a directory, e.g. used to + store files on local FS under the base media repository directory. + + Args: + file_info (FileInfo) + + Returns: + str + """ + if file_info.url_cache: + return self.filepaths.url_cache_filepath_rel(file_info.file_id) + + if file_info.server_name: + if file_info.thumbnail: + return self.filepaths.remote_media_thumbnail_rel( + server_name=file_info.server_name, + file_id=file_info.file_id, + width=file_info.thumbnail_width, + height=file_info.thumbnail_height, + content_type=file_info.thumbnail_type, + method=file_info.thumbnail_method + ) + return self.filepaths.remote_media_filepath_rel( + file_info.server_name, file_info.file_id, + ) + + if file_info.thumbnail: + return self.filepaths.local_media_thumbnail_rel( + media_id=file_info.file_id, + width=file_info.thumbnail_width, + height=file_info.thumbnail_height, + content_type=file_info.thumbnail_type, + method=file_info.thumbnail_method + ) + return self.filepaths.local_media_filepath_rel( + file_info.file_id, + ) + + +def _write_file_synchronously(source, fname): + """Write `source` to the path `fname` synchronously. Should be called + from a thread. + + Args: + source: A file like object to be written + fname (str): Path to write to + """ + dirname = os.path.dirname(fname) + if not os.path.exists(dirname): + os.makedirs(dirname) + + source.seek(0) # Ensure we read from the start of the file + with open(fname, "wb") as f: + shutil.copyfileobj(source, f) + + +class FileResponder(Responder): + """Wraps an open file that can be sent to a request. + + Args: + open_file (file): A file like object to be streamed ot the client, + is closed when finished streaming. + """ + def __init__(self, open_file): + self.open_file = open_file + + @defer.inlineCallbacks + def write_to_consumer(self, consumer): + yield FileSender().beginFileTransfer(self.open_file, consumer) + + def __exit__(self, exc_type, exc_val, exc_tb): + self.open_file.close() diff --git a/synapse/rest/media/v1/preview_url_resource.py b/synapse/rest/media/v1/preview_url_resource.py index 40d2e664eb..f3dbbb3fec 100644 --- a/synapse/rest/media/v1/preview_url_resource.py +++ b/synapse/rest/media/v1/preview_url_resource.py @@ -17,6 +17,8 @@ from twisted.web.server import NOT_DONE_YET from twisted.internet import defer from twisted.web.resource import Resource +from ._base import FileInfo + from synapse.api.errors import ( SynapseError, Codes, ) @@ -49,7 +51,7 @@ logger = logging.getLogger(__name__) class PreviewUrlResource(Resource): isLeaf = True - def __init__(self, hs, media_repo): + def __init__(self, hs, media_repo, media_storage): Resource.__init__(self) self.auth = hs.get_auth() @@ -62,6 +64,7 @@ class PreviewUrlResource(Resource): self.client = SpiderHttpClient(hs) self.media_repo = media_repo self.primary_base_path = media_repo.primary_base_path + self.media_storage = media_storage self.url_preview_url_blacklist = hs.config.url_preview_url_blacklist @@ -273,19 +276,21 @@ class PreviewUrlResource(Resource): file_id = datetime.date.today().isoformat() + '_' + random_string(16) - fpath = self.filepaths.url_cache_filepath_rel(file_id) - fname = os.path.join(self.primary_base_path, fpath) - self.media_repo._makedirs(fname) + file_info = FileInfo( + server_name=None, + file_id=file_id, + url_cache=True, + ) try: - with open(fname, "wb") as f: + with self.media_storage.store_into_file(file_info) as (f, fname, finish): logger.debug("Trying to get url '%s'" % url) length, headers, uri, code = yield self.client.get_file( url, output_stream=f, max_size=self.max_spider_size, ) # FIXME: pass through 404s and other error messages nicely - yield self.media_repo.copy_to_backup(fpath) + yield finish() media_type = headers["Content-Type"][0] time_now_ms = self.clock.time_msec() @@ -327,7 +332,6 @@ class PreviewUrlResource(Resource): ) except Exception as e: - os.remove(fname) raise SynapseError( 500, ("Failed to download content: %s" % e), Codes.UNKNOWN diff --git a/synapse/rest/media/v1/storage_provider.py b/synapse/rest/media/v1/storage_provider.py new file mode 100644 index 0000000000..2ad602e101 --- /dev/null +++ b/synapse/rest/media/v1/storage_provider.py @@ -0,0 +1,127 @@ +# -*- coding: utf-8 -*- +# Copyright 2018 New Vector Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +from twisted.internet import defer, threads + +from .media_storage import FileResponder + +from synapse.util.logcontext import preserve_fn + +import logging +import os +import shutil + + +logger = logging.getLogger(__name__) + + +class StorageProvider(object): + """A storage provider is a service that can store uploaded media and + retrieve them. + """ + def store_file(self, path, file_info): + """Store the file described by file_info. The actual contents can be + retrieved by reading the file in file_info.upload_path. + + Args: + path (str): Relative path of file in local cache + file_info (FileInfo) + + Returns: + Deferred + """ + pass + + def fetch(self, path, file_info): + """Attempt to fetch the file described by file_info and stream it + into writer. + + Args: + path (str): Relative path of file in local cache + file_info (FileInfo) + + Returns: + Deferred(Responder): Returns a Responder if the provider has the file, + otherwise returns None. + """ + pass + + +class StorageProviderWrapper(StorageProvider): + """Wraps a storage provider and provides various config options + + Args: + backend (StorageProvider) + store (bool): Whether to store new files or not. + store_synchronous (bool): Whether to wait for file to be successfully + uploaded, or todo the upload in the backgroud. + store_remote (bool): Whether remote media should be uploaded + """ + def __init__(self, backend, store, store_synchronous, store_remote): + self.backend = backend + self.store = store + self.store_synchronous = store_synchronous + self.store_remote = store_remote + + def store_file(self, path, file_info): + if not self.store: + return defer.succeed(None) + + if file_info.server_name and not self.store_remote: + return defer.succeed(None) + + if self.store_synchronous: + return self.backend.store_file(path, file_info) + else: + # TODO: Handle errors. + preserve_fn(self.backend.store_file)(path, file_info) + return defer.succeed(None) + + def fetch(self, path, file_info): + return self.backend.fetch(path, file_info) + + +class FileStorageProviderBackend(StorageProvider): + """A storage provider that stores files in a directory on a filesystem. + + Args: + cache_directory (str): Base path of the local media repository + base_directory (str): Base path to store new files + """ + + def __init__(self, cache_directory, base_directory): + self.cache_directory = cache_directory + self.base_directory = base_directory + + def store_file(self, path, file_info): + """See StorageProvider.store_file""" + + primary_fname = os.path.join(self.cache_directory, path) + backup_fname = os.path.join(self.base_directory, path) + + dirname = os.path.dirname(backup_fname) + if not os.path.exists(dirname): + os.makedirs(dirname) + + return threads.deferToThread( + shutil.copyfile, primary_fname, backup_fname, + ) + + def fetch(self, path, file_info): + """See StorageProvider.fetch""" + + backup_fname = os.path.join(self.base_directory, path) + if os.path.isfile(backup_fname): + return FileResponder(open(backup_fname, "rb")) diff --git a/synapse/rest/media/v1/thumbnail_resource.py b/synapse/rest/media/v1/thumbnail_resource.py index 53e48aba22..835540c3dd 100644 --- a/synapse/rest/media/v1/thumbnail_resource.py +++ b/synapse/rest/media/v1/thumbnail_resource.py @@ -14,7 +14,10 @@ # limitations under the License. -from ._base import parse_media_id, respond_404, respond_with_file +from ._base import ( + parse_media_id, respond_404, respond_with_file, FileInfo, + respond_with_responder, +) from twisted.web.resource import Resource from synapse.http.servlet import parse_string, parse_integer from synapse.http.server import request_handler, set_cors_headers @@ -30,12 +33,12 @@ logger = logging.getLogger(__name__) class ThumbnailResource(Resource): isLeaf = True - def __init__(self, hs, media_repo): + def __init__(self, hs, media_repo, media_storage): Resource.__init__(self) self.store = hs.get_datastore() - self.filepaths = media_repo.filepaths self.media_repo = media_repo + self.media_storage = media_storage self.dynamic_thumbnails = hs.config.dynamic_thumbnails self.server_name = hs.hostname self.version_string = hs.version_string @@ -91,23 +94,22 @@ class ThumbnailResource(Resource): thumbnail_info = self._select_thumbnail( width, height, method, m_type, thumbnail_infos ) - t_width = thumbnail_info["thumbnail_width"] - t_height = thumbnail_info["thumbnail_height"] - t_type = thumbnail_info["thumbnail_type"] - t_method = thumbnail_info["thumbnail_method"] - - if media_info["url_cache"]: - # TODO: Check the file still exists, if it doesn't we can redownload - # it from the url `media_info["url_cache"]` - file_path = self.filepaths.url_cache_thumbnail( - media_id, t_width, t_height, t_type, t_method, - ) - else: - file_path = self.filepaths.local_media_thumbnail( - media_id, t_width, t_height, t_type, t_method, - ) - yield respond_with_file(request, t_type, file_path) + file_info = FileInfo( + server_name=None, file_id=media_id, + url_cache=media_info["url_cache"], + thumbnail=True, + thumbnail_width=thumbnail_info["thumbnail_width"], + thumbnail_height=thumbnail_info["thumbnail_height"], + thumbnail_type=thumbnail_info["thumbnail_type"], + thumbnail_method=thumbnail_info["thumbnail_method"], + ) + + t_type = file_info.thumbnail_type + t_length = thumbnail_info["thumbnail_length"] + + responder = yield self.media_storage.fetch_media(file_info) + yield respond_with_responder(request, responder, t_type, t_length) else: respond_404(request) @@ -129,20 +131,23 @@ class ThumbnailResource(Resource): t_type = info["thumbnail_type"] == desired_type if t_w and t_h and t_method and t_type: - if media_info["url_cache"]: - # TODO: Check the file still exists, if it doesn't we can redownload - # it from the url `media_info["url_cache"]` - file_path = self.filepaths.url_cache_thumbnail( - media_id, desired_width, desired_height, desired_type, - desired_method, - ) - else: - file_path = self.filepaths.local_media_thumbnail( - media_id, desired_width, desired_height, desired_type, - desired_method, - ) - yield respond_with_file(request, desired_type, file_path) - return + file_info = FileInfo( + server_name=None, file_id=media_id, + url_cache=media_info["url_cache"], + thumbnail=True, + thumbnail_width=info["thumbnail_width"], + thumbnail_height=info["thumbnail_height"], + thumbnail_type=info["thumbnail_type"], + thumbnail_method=info["thumbnail_method"], + ) + + t_type = file_info.thumbnail_type + t_length = info["thumbnail_length"] + + responder = yield self.media_storage.fetch_media(file_info) + if responder: + yield respond_with_responder(request, responder, t_type, t_length) + return logger.debug("We don't have a local thumbnail of that size. Generating") @@ -175,12 +180,22 @@ class ThumbnailResource(Resource): t_type = info["thumbnail_type"] == desired_type if t_w and t_h and t_method and t_type: - file_path = self.filepaths.remote_media_thumbnail( - server_name, file_id, desired_width, desired_height, - desired_type, desired_method, + file_info = FileInfo( + server_name=None, file_id=media_id, + thumbnail=True, + thumbnail_width=info["thumbnail_width"], + thumbnail_height=info["thumbnail_height"], + thumbnail_type=info["thumbnail_type"], + thumbnail_method=info["thumbnail_method"], ) - yield respond_with_file(request, desired_type, file_path) - return + + t_type = file_info.thumbnail_type + t_length = info["thumbnail_length"] + + responder = yield self.media_storage.fetch_media(file_info) + if responder: + yield respond_with_responder(request, responder, t_type, t_length) + return logger.debug("We don't have a local thumbnail of that size. Generating") @@ -211,17 +226,20 @@ class ThumbnailResource(Resource): thumbnail_info = self._select_thumbnail( width, height, method, m_type, thumbnail_infos ) - t_width = thumbnail_info["thumbnail_width"] - t_height = thumbnail_info["thumbnail_height"] - t_type = thumbnail_info["thumbnail_type"] - t_method = thumbnail_info["thumbnail_method"] - file_id = thumbnail_info["filesystem_id"] + file_info = FileInfo( + server_name=None, file_id=media_id, + thumbnail=True, + thumbnail_width=thumbnail_info["thumbnail_width"], + thumbnail_height=thumbnail_info["thumbnail_height"], + thumbnail_type=thumbnail_info["thumbnail_type"], + thumbnail_method=thumbnail_info["thumbnail_method"], + ) + + t_type = file_info.thumbnail_type t_length = thumbnail_info["thumbnail_length"] - file_path = self.filepaths.remote_media_thumbnail( - server_name, file_id, t_width, t_height, t_type, t_method, - ) - yield respond_with_file(request, t_type, file_path, t_length) + responder = yield self.media_storage.fetch_media(file_info) + yield respond_with_responder(request, responder, t_type, t_length) else: respond_404(request) |