103 lines
3.6 KiB
Python
103 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import base64
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import logging
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import os
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import re
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from canonicaljson import json
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from twisted.protocols.basic import FileSender
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from twisted.web import resource, server
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from synapse.api.errors import Codes, cs_error
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from synapse.http.server import finish_request, respond_with_json_bytes
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logger = logging.getLogger(__name__)
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class ContentRepoResource(resource.Resource):
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"""Provides file uploading and downloading.
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Uploads are POSTed to wherever this Resource is linked to. This resource
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returns a "content token" which can be used to GET this content again. The
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token is typically a path, but it may not be. Tokens can expire, be
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one-time uses, etc.
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In this case, the token is a path to the file and contains 3 interesting
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sections:
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- User ID base64d (for namespacing content to each user)
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- random 24 char string
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- Content type base64d (so we can return it when clients GET it)
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"""
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isLeaf = True
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def __init__(self, hs, directory):
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resource.Resource.__init__(self)
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self.hs = hs
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self.directory = directory
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def render_GET(self, request):
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# no auth here on purpose, to allow anyone to view, even across home
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# servers.
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# TODO: A little crude here, we could do this better.
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filename = request.path.decode('ascii').split('/')[-1]
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# be paranoid
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filename = re.sub("[^0-9A-z.-_]", "", filename)
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file_path = self.directory + "/" + filename
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logger.debug("Searching for %s", file_path)
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if os.path.isfile(file_path):
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# filename has the content type
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base64_contentype = filename.split(".")[1]
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content_type = base64.urlsafe_b64decode(base64_contentype)
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logger.info("Sending file %s", file_path)
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f = open(file_path, 'rb')
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request.setHeader('Content-Type', content_type)
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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 matrix
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# clients are smart enough to be happy with Cache-Control (right?)
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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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d = FileSender().beginFileTransfer(f, request)
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# after the file has been sent, clean up and finish the request
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def cbFinished(ignored):
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f.close()
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finish_request(request)
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d.addCallback(cbFinished)
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else:
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respond_with_json_bytes(
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request,
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404,
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json.dumps(cs_error("Not found", code=Codes.NOT_FOUND)),
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send_cors=True)
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return server.NOT_DONE_YET
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def render_OPTIONS(self, request):
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respond_with_json_bytes(request, 200, {}, send_cors=True)
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return server.NOT_DONE_YET
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