mirror of
https://mau.dev/maunium/synapse.git
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a0b181bd17
Removes device_id and ClientInfo device_id is never actually written, and the matrix.org DB has no non-null entries for it. Right now, it's just cluttering up code. This doesn't remove the columns from the database, because that's fiddly.
213 lines
7.9 KiB
Python
213 lines
7.9 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 synapse.http.server import respond_with_json_bytes
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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_exception, SynapseError, CodeMessageException, Codes, cs_error
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)
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from twisted.protocols.basic import FileSender
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from twisted.web import server, resource
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from twisted.internet import defer
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import base64
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import simplejson as json
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import logging
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import os
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import re
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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, auth, external_addr):
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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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self.auth = auth
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self.external_addr = external_addr.rstrip('/')
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self.max_upload_size = hs.config.max_upload_size
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if not os.path.isdir(self.directory):
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os.mkdir(self.directory)
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logger.info("ContentRepoResource : Created %s directory.",
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self.directory)
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@defer.inlineCallbacks
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def map_request_to_name(self, request):
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# auth the user
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auth_user, _ = yield self.auth.get_user_by_req(request)
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# namespace all file uploads on the user
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prefix = base64.urlsafe_b64encode(
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auth_user.to_string()
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).replace('=', '')
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# use a random string for the main portion
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main_part = random_string(24)
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# suffix with a file extension if we can make one. This is nice to
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# provide a hint to clients on the file information. We will also reuse
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# this info to spit back the content type to the client.
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suffix = ""
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if request.requestHeaders.hasHeader("Content-Type"):
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content_type = request.requestHeaders.getRawHeaders(
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"Content-Type")[0]
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suffix = "." + base64.urlsafe_b64encode(content_type)
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if (content_type.split("/")[0].lower() in
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["image", "video", "audio"]):
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file_ext = content_type.split("/")[-1]
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# be a little paranoid and only allow a-z
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file_ext = re.sub("[^a-z]", "", file_ext)
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suffix += "." + file_ext
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file_name = prefix + main_part + suffix
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file_path = os.path.join(self.directory, file_name)
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logger.info("User %s is uploading a file to path %s",
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auth_user.to_string(),
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file_path)
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# keep trying to make a non-clashing file, with a sensible max attempts
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attempts = 0
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while os.path.exists(file_path):
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main_part = random_string(24)
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file_name = prefix + main_part + suffix
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file_path = os.path.join(self.directory, file_name)
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attempts += 1
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if attempts > 25: # really? Really?
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raise SynapseError(500, "Unable to create file.")
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defer.returnValue(file_path)
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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.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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"Cache-Control", "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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request.finish()
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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_POST(self, request):
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self._async_render(request)
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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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@defer.inlineCallbacks
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def _async_render(self, request):
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try:
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# TODO: The checks here are a bit late. The content will have
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# already been uploaded to a tmp file at this point
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content_length = request.getHeader("Content-Length")
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if content_length is None:
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raise SynapseError(
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msg="Request must specify a Content-Length", code=400
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)
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if int(content_length) > self.max_upload_size:
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raise SynapseError(
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msg="Upload request body is too large",
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code=413,
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)
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fname = yield self.map_request_to_name(request)
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# TODO I have a suspicious feeling this is just going to block
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with open(fname, "wb") as f:
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f.write(request.content.read())
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# FIXME (erikj): These should use constants.
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file_name = os.path.basename(fname)
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# FIXME: we can't assume what the repo's public mounted path is
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# ...plus self-signed SSL won't work to remote clients anyway
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# ...and we can't assume that it's SSL anyway, as we might want to
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# serve it via the non-SSL listener...
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url = "%s/_matrix/content/%s" % (
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self.external_addr, file_name
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)
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respond_with_json_bytes(request, 200,
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json.dumps({"content_token": url}),
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send_cors=True)
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except CodeMessageException as e:
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logger.exception(e)
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respond_with_json_bytes(request, e.code,
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json.dumps(cs_exception(e)))
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except Exception as e:
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logger.error("Failed to store file: %s" % e)
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respond_with_json_bytes(
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request,
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500,
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json.dumps({"error": "Internal server error"}),
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send_cors=True)
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