155 lines
4.8 KiB
Python
155 lines
4.8 KiB
Python
# -*- 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.
|
|
|
|
import logging
|
|
import os
|
|
import shutil
|
|
|
|
from twisted.internet import defer
|
|
|
|
from synapse.config._base import Config
|
|
from synapse.logging.context import defer_to_thread, run_in_background
|
|
|
|
from .media_storage import FileResponder
|
|
|
|
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_local (bool): Whether to store new local files or not.
|
|
store_synchronous (bool): Whether to wait for file to be successfully
|
|
uploaded, or todo the upload in the background.
|
|
store_remote (bool): Whether remote media should be uploaded
|
|
"""
|
|
|
|
def __init__(self, backend, store_local, store_synchronous, store_remote):
|
|
self.backend = backend
|
|
self.store_local = store_local
|
|
self.store_synchronous = store_synchronous
|
|
self.store_remote = store_remote
|
|
|
|
def __str__(self):
|
|
return "StorageProviderWrapper[%s]" % (self.backend,)
|
|
|
|
def store_file(self, path, file_info):
|
|
if not file_info.server_name and not self.store_local:
|
|
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.
|
|
def store():
|
|
try:
|
|
return self.backend.store_file(path, file_info)
|
|
except Exception:
|
|
logger.exception("Error storing file")
|
|
|
|
run_in_background(store)
|
|
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:
|
|
hs (HomeServer)
|
|
config: The config returned by `parse_config`.
|
|
"""
|
|
|
|
def __init__(self, hs, config):
|
|
self.hs = hs
|
|
self.cache_directory = hs.config.media_store_path
|
|
self.base_directory = config
|
|
|
|
def __str__(self):
|
|
return "FileStorageProviderBackend[%s]" % (self.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 defer_to_thread(
|
|
self.hs.get_reactor(), 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"))
|
|
|
|
@staticmethod
|
|
def parse_config(config):
|
|
"""Called on startup to parse config supplied. This should parse
|
|
the config and raise if there is a problem.
|
|
|
|
The returned value is passed into the constructor.
|
|
|
|
In this case we only care about a single param, the directory, so let's
|
|
just pull that out.
|
|
"""
|
|
return Config.ensure_directory(config["directory"])
|