332 lines
11 KiB
Python
332 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014, 2015 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from .thumbnailer import Thumbnailer
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from synapse.http.server import respond_with_json
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from synapse.util.stringutils import random_string
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from synapse.api.errors import (
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cs_error, Codes, SynapseError
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)
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from twisted.internet import defer
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from twisted.web.resource import Resource
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from twisted.protocols.basic import FileSender
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from synapse.util.async import ObservableDeferred
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import os
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import logging
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logger = logging.getLogger(__name__)
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def parse_media_id(request):
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try:
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server_name, media_id = request.postpath
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return (server_name, media_id)
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except:
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raise SynapseError(
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404,
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"Invalid media id token %r" % (request.postpath,),
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Codes.UNKNOWN,
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)
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class BaseMediaResource(Resource):
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isLeaf = True
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def __init__(self, hs, filepaths):
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Resource.__init__(self)
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self.auth = hs.get_auth()
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self.client = hs.get_http_client()
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self.clock = hs.get_clock()
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self.server_name = hs.hostname
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self.store = hs.get_datastore()
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self.max_upload_size = hs.config.max_upload_size
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self.max_image_pixels = hs.config.max_image_pixels
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self.filepaths = filepaths
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self.version_string = hs.version_string
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self.downloads = {}
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def _respond_404(self, request):
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respond_with_json(
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request, 404,
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cs_error(
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"Not found %r" % (request.postpath,),
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code=Codes.NOT_FOUND,
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),
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send_cors=True
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)
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@staticmethod
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def _makedirs(filepath):
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dirname = os.path.dirname(filepath)
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if not os.path.exists(dirname):
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os.makedirs(dirname)
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def _get_remote_media(self, server_name, media_id):
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key = (server_name, media_id)
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download = self.downloads.get(key)
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if download is None:
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download = self._get_remote_media_impl(server_name, media_id)
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download = ObservableDeferred(
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download,
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consumeErrors=True
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)
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self.downloads[key] = download
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@download.addBoth
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def callback(media_info):
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del self.downloads[key]
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return media_info
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return download.observe()
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@defer.inlineCallbacks
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def _get_remote_media_impl(self, server_name, media_id):
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media_info = yield self.store.get_cached_remote_media(
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server_name, media_id
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)
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if not media_info:
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media_info = yield self._download_remote_file(
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server_name, media_id
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)
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defer.returnValue(media_info)
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@defer.inlineCallbacks
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def _download_remote_file(self, server_name, media_id):
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file_id = random_string(24)
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fname = self.filepaths.remote_media_filepath(
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server_name, file_id
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)
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self._makedirs(fname)
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try:
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with open(fname, "wb") as f:
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request_path = "/".join((
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"/_matrix/media/v1/download", server_name, media_id,
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))
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length, headers = yield self.client.get_file(
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server_name, request_path, output_stream=f,
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max_size=self.max_upload_size,
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)
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media_type = headers["Content-Type"][0]
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time_now_ms = self.clock.time_msec()
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yield self.store.store_cached_remote_media(
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origin=server_name,
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media_id=media_id,
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media_type=media_type,
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time_now_ms=self.clock.time_msec(),
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upload_name=None,
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media_length=length,
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filesystem_id=file_id,
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)
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except:
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os.remove(fname)
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raise
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media_info = {
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"media_type": media_type,
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"media_length": length,
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"upload_name": None,
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"created_ts": time_now_ms,
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"filesystem_id": file_id,
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}
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yield self._generate_remote_thumbnails(
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server_name, media_id, media_info
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)
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defer.returnValue(media_info)
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@defer.inlineCallbacks
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def _respond_with_file(self, request, media_type, file_path,
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file_size=None):
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logger.debug("Responding with %r", file_path)
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if os.path.isfile(file_path):
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request.setHeader(b"Content-Type", media_type.encode("UTF-8"))
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# cache for at least a day.
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# XXX: we might want to turn this off for data we don't want to
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# recommend caching as it's sensitive or private - or at least
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# select private. don't bother setting Expires as all our
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# clients are smart enough to be happy with Cache-Control
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request.setHeader(
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b"Cache-Control", b"public,max-age=86400,s-maxage=86400"
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)
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if file_size is None:
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stat = os.stat(file_path)
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file_size = stat.st_size
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request.setHeader(
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b"Content-Length", b"%d" % (file_size,)
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)
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with open(file_path, "rb") as f:
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yield FileSender().beginFileTransfer(f, request)
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request.finish()
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else:
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self._respond_404(request)
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def _get_thumbnail_requirements(self, media_type):
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if media_type == "image/jpeg":
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return (
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(32, 32, "crop", "image/jpeg"),
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(96, 96, "crop", "image/jpeg"),
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(320, 240, "scale", "image/jpeg"),
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(640, 480, "scale", "image/jpeg"),
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)
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elif (media_type == "image/png") or (media_type == "image/gif"):
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return (
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(32, 32, "crop", "image/png"),
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(96, 96, "crop", "image/png"),
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(320, 240, "scale", "image/png"),
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(640, 480, "scale", "image/png"),
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)
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else:
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return ()
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@defer.inlineCallbacks
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def _generate_local_thumbnails(self, media_id, media_info):
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media_type = media_info["media_type"]
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requirements = self._get_thumbnail_requirements(media_type)
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if not requirements:
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return
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input_path = self.filepaths.local_media_filepath(media_id)
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thumbnailer = Thumbnailer(input_path)
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m_width = thumbnailer.width
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m_height = thumbnailer.height
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if m_width * m_height >= self.max_image_pixels:
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logger.info(
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"Image too large to thumbnail %r x %r > %r",
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m_width, m_height, self.max_image_pixels
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)
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return
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scales = set()
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crops = set()
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for r_width, r_height, r_method, r_type in requirements:
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if r_method == "scale":
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t_width, t_height = thumbnailer.aspect(r_width, r_height)
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scales.add((
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min(m_width, t_width), min(m_height, t_height), r_type,
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))
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elif r_method == "crop":
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crops.add((r_width, r_height, r_type))
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for t_width, t_height, t_type in scales:
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t_method = "scale"
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t_path = self.filepaths.local_media_thumbnail(
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media_id, t_width, t_height, t_type, t_method
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)
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self._makedirs(t_path)
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t_len = thumbnailer.scale(t_path, t_width, t_height, t_type)
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yield self.store.store_local_thumbnail(
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media_id, t_width, t_height, t_type, t_method, t_len
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)
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for t_width, t_height, t_type in crops:
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if (t_width, t_height, t_type) in scales:
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# If the aspect ratio of the cropped thumbnail matches a purely
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# scaled one then there is no point in calculating a separate
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# thumbnail.
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continue
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t_method = "crop"
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t_path = self.filepaths.local_media_thumbnail(
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media_id, t_width, t_height, t_type, t_method
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)
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self._makedirs(t_path)
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t_len = thumbnailer.crop(t_path, t_width, t_height, t_type)
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yield self.store.store_local_thumbnail(
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media_id, t_width, t_height, t_type, t_method, t_len
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)
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defer.returnValue({
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"width": m_width,
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"height": m_height,
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})
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@defer.inlineCallbacks
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def _generate_remote_thumbnails(self, server_name, media_id, media_info):
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media_type = media_info["media_type"]
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file_id = media_info["filesystem_id"]
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requirements = self._get_thumbnail_requirements(media_type)
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if not requirements:
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return
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input_path = self.filepaths.remote_media_filepath(server_name, file_id)
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thumbnailer = Thumbnailer(input_path)
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m_width = thumbnailer.width
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m_height = thumbnailer.height
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if m_width * m_height >= self.max_image_pixels:
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logger.info(
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"Image too large to thumbnail %r x %r > %r",
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m_width, m_height, self.max_image_pixels
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)
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return
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scales = set()
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crops = set()
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for r_width, r_height, r_method, r_type in requirements:
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if r_method == "scale":
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t_width, t_height = thumbnailer.aspect(r_width, r_height)
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scales.add((
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min(m_width, t_width), min(m_height, t_height), r_type,
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))
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elif r_method == "crop":
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crops.add((r_width, r_height, r_type))
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for t_width, t_height, t_type in scales:
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t_method = "scale"
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t_path = self.filepaths.remote_media_thumbnail(
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server_name, file_id, t_width, t_height, t_type, t_method
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)
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self._makedirs(t_path)
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t_len = thumbnailer.scale(t_path, t_width, t_height, t_type)
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yield self.store.store_remote_media_thumbnail(
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server_name, media_id, file_id,
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t_width, t_height, t_type, t_method, t_len
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)
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for t_width, t_height, t_type in crops:
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if (t_width, t_height, t_type) in scales:
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# If the aspect ratio of the cropped thumbnail matches a purely
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# scaled one then there is no point in calculating a separate
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# thumbnail.
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continue
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t_method = "crop"
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t_path = self.filepaths.remote_media_thumbnail(
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server_name, file_id, t_width, t_height, t_type, t_method
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)
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self._makedirs(t_path)
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t_len = thumbnailer.crop(t_path, t_width, t_height, t_type)
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yield self.store.store_remote_media_thumbnail(
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server_name, media_id, file_id,
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t_width, t_height, t_type, t_method, t_len
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)
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defer.returnValue({
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"width": m_width,
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"height": m_height,
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})
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