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Merge pull request #2767 from matrix-org/erikj/media_storage_refactor

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Refactor MediaRepository to separate out storage
This commit is contained in:
Erik Johnston 2018-01-16 10:23:50 +00:00 committed by GitHub
commit 1159abbdd2
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7 changed files with 839 additions and 342 deletions
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144
synapse/rest/media/v1/_base.py
View file

@ -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

73
synapse/rest/media/v1/download_resource.py
View file

@ -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
)
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
@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,
)
yield self.media_repo.get_remote_media(request, server_name, media_id, name)

481
synapse/rest/media/v1/media_repository.py
View file

@ -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.
fpath = self.filepaths.remote_media_filepath_rel(
server_name, file_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]
"""
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()
upload_name = upload_name.decode("utf-8")
except UnicodeDecodeError:
upload_name = None
else:
upload_name = None
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")
logger.info("Stored remote media in file %r", fname)
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
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,
))

228
synapse/rest/media/v1/media_storage.py Normal file
View file

@ -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()

18
synapse/rest/media/v1/preview_url_resource.py
View file

@ -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

127
synapse/rest/media/v1/storage_provider.py Normal file
View file

@ -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"))

110
synapse/rest/media/v1/thumbnail_resource.py
View file

@ -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)