diff options
Diffstat (limited to 'synapse/http')
| -rw-r--r-- | synapse/http/content_repository.py | 191 | ||||
| -rw-r--r-- | synapse/http/server.py | 163 |
2 files changed, 192 insertions, 162 deletions
diff --git a/synapse/http/content_repository.py b/synapse/http/content_repository.py new file mode 100644 index 0000000000..9b1ab3fc3e --- /dev/null +++ b/synapse/http/content_repository.py @@ -0,0 +1,191 @@ +# -*- coding: utf-8 -*- +# Copyright 2014 matrix.org +# +# 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 .server import respond_with_json_bytes + +from synapse.util.stringutils import random_string +from synapse.api.errors import ( + cs_exception, SynapseError, CodeMessageException, Codes, cs_error +) + +from twisted.protocols.basic import FileSender +from twisted.web import server, resource +from twisted.internet import defer + +import base64 +import json +import logging +import os +import re + +logger = logging.getLogger(__name__) + + +class ContentRepoResource(resource.Resource): + """Provides file uploading and downloading. + + Uploads are POSTed to wherever this Resource is linked to. This resource + returns a "content token" which can be used to GET this content again. The + token is typically a path, but it may not be. Tokens can expire, be one-time + uses, etc. + + In this case, the token is a path to the file and contains 3 interesting + sections: + - User ID base64d (for namespacing content to each user) + - random 24 char string + - Content type base64d (so we can return it when clients GET it) + + """ + isLeaf = True + + def __init__(self, hs, directory, auth): + resource.Resource.__init__(self) + self.hs = hs + self.directory = directory + self.auth = auth + + if not os.path.isdir(self.directory): + os.mkdir(self.directory) + logger.info("ContentRepoResource : Created %s directory.", + self.directory) + + @defer.inlineCallbacks + def map_request_to_name(self, request): + # auth the user + auth_user = yield self.auth.get_user_by_req(request) + + # namespace all file uploads on the user + prefix = base64.urlsafe_b64encode( + auth_user.to_string() + ).replace('=', '') + + # use a random string for the main portion + main_part = random_string(24) + + # suffix with a file extension if we can make one. This is nice to + # provide a hint to clients on the file information. We will also reuse + # this info to spit back the content type to the client. + suffix = "" + if request.requestHeaders.hasHeader("Content-Type"): + content_type = request.requestHeaders.getRawHeaders( + "Content-Type")[0] + suffix = "." + base64.urlsafe_b64encode(content_type) + if (content_type.split("/")[0].lower() in + ["image", "video", "audio"]): + file_ext = content_type.split("/")[-1] + # be a little paranoid and only allow a-z + file_ext = re.sub("[^a-z]", "", file_ext) + suffix += "." + file_ext + + file_name = prefix + main_part + suffix + file_path = os.path.join(self.directory, file_name) + logger.info("User %s is uploading a file to path %s", + auth_user.to_string(), + file_path) + + # keep trying to make a non-clashing file, with a sensible max attempts + attempts = 0 + while os.path.exists(file_path): + main_part = random_string(24) + file_name = prefix + main_part + suffix + file_path = os.path.join(self.directory, file_name) + attempts += 1 + if attempts > 25: # really? Really? + raise SynapseError(500, "Unable to create file.") + + defer.returnValue(file_path) + + def render_GET(self, request): + # no auth here on purpose, to allow anyone to view, even across home + # servers. + + # TODO: A little crude here, we could do this better. + filename = request.path.split('/')[-1] + # be paranoid + filename = re.sub("[^0-9A-z.-_]", "", filename) + + file_path = self.directory + "/" + filename + + logger.debug("Searching for %s", file_path) + + if os.path.isfile(file_path): + # filename has the content type + base64_contentype = filename.split(".")[1] + content_type = base64.urlsafe_b64decode(base64_contentype) + logger.info("Sending file %s", file_path) + f = open(file_path, 'rb') + request.setHeader('Content-Type', content_type) + d = FileSender().beginFileTransfer(f, request) + + # after the file has been sent, clean up and finish the request + def cbFinished(ignored): + f.close() + request.finish() + d.addCallback(cbFinished) + else: + respond_with_json_bytes( + request, + 404, + json.dumps(cs_error("Not found", code=Codes.NOT_FOUND)), + send_cors=True) + + return server.NOT_DONE_YET + + def render_POST(self, request): + self._async_render(request) + return server.NOT_DONE_YET + + def render_OPTIONS(self, request): + respond_with_json_bytes(request, 200, {}, send_cors=True) + return server.NOT_DONE_YET + + @defer.inlineCallbacks + def _async_render(self, request): + try: + fname = yield self.map_request_to_name(request) + + # TODO I have a suspcious feeling this is just going to block + with open(fname, "wb") as f: + f.write(request.content.read()) + + + # FIXME (erikj): These should use constants. + file_name = os.path.basename(fname) + # FIXME: we can't assume what the public mounted path of the repo is + # ...plus self-signed SSL won't work to remote clients anyway + # ...and we can't assume that it's SSL anyway, as we might want to + # server it via the non-SSL listener... + url = "https://%s/_matrix/content/%s" % ( + self.hs.domain_with_port, file_name + ) + + respond_with_json_bytes(request, 200, + json.dumps({"content_token": url}), + send_cors=True) + + except CodeMessageException as e: + logger.exception(e) + respond_with_json_bytes(request, e.code, + json.dumps(cs_exception(e))) + except Exception as e: + logger.error("Failed to store file: %s" % e) + respond_with_json_bytes( + request, + 500, + json.dumps({"error": "Internal server error"}), + send_cors=True) + + + diff --git a/synapse/http/server.py b/synapse/http/server.py index 74c220e869..5440a7fdda 100644 --- a/synapse/http/server.py +++ b/synapse/http/server.py @@ -18,22 +18,16 @@ from syutil.jsonutil import ( encode_canonical_json, encode_pretty_printed_json ) from synapse.api.errors import ( - cs_exception, SynapseError, CodeMessageException, Codes, cs_error + cs_exception, SynapseError, CodeMessageException ) -from synapse.util.stringutils import random_string from twisted.internet import defer, reactor -from twisted.protocols.basic import FileSender from twisted.web import server, resource from twisted.web.server import NOT_DONE_YET from twisted.web.util import redirectTo -import base64 import collections -import json import logging -import os -import re logger = logging.getLogger(__name__) @@ -198,161 +192,6 @@ class RootRedirect(resource.Resource): return resource.Resource.getChild(self, name, request) -class ContentRepoResource(resource.Resource): - """Provides file uploading and downloading. - - Uploads are POSTed to wherever this Resource is linked to. This resource - returns a "content token" which can be used to GET this content again. The - token is typically a path, but it may not be. Tokens can expire, be one-time - uses, etc. - - In this case, the token is a path to the file and contains 3 interesting - sections: - - User ID base64d (for namespacing content to each user) - - random 24 char string - - Content type base64d (so we can return it when clients GET it) - - """ - isLeaf = True - - def __init__(self, hs, directory, auth): - resource.Resource.__init__(self) - self.hs = hs - self.directory = directory - self.auth = auth - - if not os.path.isdir(self.directory): - os.mkdir(self.directory) - logger.info("ContentRepoResource : Created %s directory.", - self.directory) - - @defer.inlineCallbacks - def map_request_to_name(self, request): - # auth the user - auth_user = yield self.auth.get_user_by_req(request) - - # namespace all file uploads on the user - prefix = base64.urlsafe_b64encode( - auth_user.to_string() - ).replace('=', '') - - # use a random string for the main portion - main_part = random_string(24) - - # suffix with a file extension if we can make one. This is nice to - # provide a hint to clients on the file information. We will also reuse - # this info to spit back the content type to the client. - suffix = "" - if request.requestHeaders.hasHeader("Content-Type"): - content_type = request.requestHeaders.getRawHeaders( - "Content-Type")[0] - suffix = "." + base64.urlsafe_b64encode(content_type) - if (content_type.split("/")[0].lower() in - ["image", "video", "audio"]): - file_ext = content_type.split("/")[-1] - # be a little paranoid and only allow a-z - file_ext = re.sub("[^a-z]", "", file_ext) - suffix += "." + file_ext - - file_name = prefix + main_part + suffix - file_path = os.path.join(self.directory, file_name) - logger.info("User %s is uploading a file to path %s", - auth_user.to_string(), - file_path) - - # keep trying to make a non-clashing file, with a sensible max attempts - attempts = 0 - while os.path.exists(file_path): - main_part = random_string(24) - file_name = prefix + main_part + suffix - file_path = os.path.join(self.directory, file_name) - attempts += 1 - if attempts > 25: # really? Really? - raise SynapseError(500, "Unable to create file.") - - defer.returnValue(file_path) - - def render_GET(self, request): - # no auth here on purpose, to allow anyone to view, even across home - # servers. - - # TODO: A little crude here, we could do this better. - filename = request.path.split('/')[-1] - # be paranoid - filename = re.sub("[^0-9A-z.-_]", "", filename) - - file_path = self.directory + "/" + filename - - logger.debug("Searching for %s", file_path) - - if os.path.isfile(file_path): - # filename has the content type - base64_contentype = filename.split(".")[1] - content_type = base64.urlsafe_b64decode(base64_contentype) - logger.info("Sending file %s", file_path) - f = open(file_path, 'rb') - request.setHeader('Content-Type', content_type) - d = FileSender().beginFileTransfer(f, request) - - # after the file has been sent, clean up and finish the request - def cbFinished(ignored): - f.close() - request.finish() - d.addCallback(cbFinished) - else: - respond_with_json_bytes( - request, - 404, - json.dumps(cs_error("Not found", code=Codes.NOT_FOUND)), - send_cors=True) - - return server.NOT_DONE_YET - - def render_POST(self, request): - self._async_render(request) - return server.NOT_DONE_YET - - def render_OPTIONS(self, request): - respond_with_json_bytes(request, 200, {}, send_cors=True) - return server.NOT_DONE_YET - - @defer.inlineCallbacks - def _async_render(self, request): - try: - fname = yield self.map_request_to_name(request) - - # TODO I have a suspcious feeling this is just going to block - with open(fname, "wb") as f: - f.write(request.content.read()) - - - # FIXME (erikj): These should use constants. - file_name = os.path.basename(fname) - # FIXME: we can't assume what the public mounted path of the repo is - # ...plus self-signed SSL won't work to remote clients anyway - # ...and we can't assume that it's SSL anyway, as we might want to - # server it via the non-SSL listener... - url = "https://%s/_matrix/content/%s" % ( - self.hs.domain_with_port, file_name - ) - - respond_with_json_bytes(request, 200, - json.dumps({"content_token": url}), - send_cors=True) - - except CodeMessageException as e: - logger.exception(e) - respond_with_json_bytes(request, e.code, - json.dumps(cs_exception(e))) - except Exception as e: - logger.error("Failed to store file: %s" % e) - respond_with_json_bytes( - request, - 500, - json.dumps({"error": "Internal server error"}), - send_cors=True) - - def respond_with_json_bytes(request, code, json_bytes, send_cors=False, response_code_message=None): """Sends encoded JSON in response to the given request. |