mirror of
https://mau.dev/maunium/synapse.git
synced 2024-07-20 01:52:17 +00:00
01e93f48ed
This code brings the SimpleHttpClient into line with the MatrixFederationHttpClient by having it raise HttpResponseExceptions when a request fails (rather than trying to parse for matrix errors and maybe raising MatrixCodeMessageException). Then, whenever we were checking for MatrixCodeMessageException and turning them into SynapseErrors, we now need to check for HttpResponseExceptions and call to_synapse_error.
568 lines
19 KiB
Python
568 lines
19 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2014-2016 OpenMarket Ltd
|
|
# 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 urllib
|
|
|
|
from six import StringIO
|
|
|
|
from canonicaljson import encode_canonical_json, json
|
|
from prometheus_client import Counter
|
|
|
|
from OpenSSL import SSL
|
|
from OpenSSL.SSL import VERIFY_NONE
|
|
from twisted.internet import defer, protocol, reactor, ssl, task
|
|
from twisted.internet.endpoints import HostnameEndpoint, wrapClientTLS
|
|
from twisted.web._newclient import ResponseDone
|
|
from twisted.web.client import (
|
|
Agent,
|
|
BrowserLikeRedirectAgent,
|
|
ContentDecoderAgent,
|
|
FileBodyProducer as TwistedFileBodyProducer,
|
|
GzipDecoder,
|
|
HTTPConnectionPool,
|
|
PartialDownloadError,
|
|
readBody,
|
|
)
|
|
from twisted.web.http import PotentialDataLoss
|
|
from twisted.web.http_headers import Headers
|
|
|
|
from synapse.api.errors import Codes, HttpResponseException, SynapseError
|
|
from synapse.http import cancelled_to_request_timed_out_error, redact_uri
|
|
from synapse.http.endpoint import SpiderEndpoint
|
|
from synapse.util.async import add_timeout_to_deferred
|
|
from synapse.util.caches import CACHE_SIZE_FACTOR
|
|
from synapse.util.logcontext import make_deferred_yieldable
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
outgoing_requests_counter = Counter("synapse_http_client_requests", "", ["method"])
|
|
incoming_responses_counter = Counter("synapse_http_client_responses", "",
|
|
["method", "code"])
|
|
|
|
|
|
class SimpleHttpClient(object):
|
|
"""
|
|
A simple, no-frills HTTP client with methods that wrap up common ways of
|
|
using HTTP in Matrix
|
|
"""
|
|
def __init__(self, hs):
|
|
self.hs = hs
|
|
|
|
pool = HTTPConnectionPool(reactor)
|
|
|
|
# the pusher makes lots of concurrent SSL connections to sygnal, and
|
|
# tends to do so in batches, so we need to allow the pool to keep lots
|
|
# of idle connections around.
|
|
pool.maxPersistentPerHost = max((100 * CACHE_SIZE_FACTOR, 5))
|
|
pool.cachedConnectionTimeout = 2 * 60
|
|
|
|
# The default context factory in Twisted 14.0.0 (which we require) is
|
|
# BrowserLikePolicyForHTTPS which will do regular cert validation
|
|
# 'like a browser'
|
|
self.agent = Agent(
|
|
reactor,
|
|
connectTimeout=15,
|
|
contextFactory=hs.get_http_client_context_factory(),
|
|
pool=pool,
|
|
)
|
|
self.user_agent = hs.version_string
|
|
self.clock = hs.get_clock()
|
|
if hs.config.user_agent_suffix:
|
|
self.user_agent = "%s %s" % (self.user_agent, hs.config.user_agent_suffix,)
|
|
|
|
@defer.inlineCallbacks
|
|
def request(self, method, uri, *args, **kwargs):
|
|
# A small wrapper around self.agent.request() so we can easily attach
|
|
# counters to it
|
|
outgoing_requests_counter.labels(method).inc()
|
|
|
|
# log request but strip `access_token` (AS requests for example include this)
|
|
logger.info("Sending request %s %s", method, redact_uri(uri))
|
|
|
|
try:
|
|
request_deferred = self.agent.request(
|
|
method, uri, *args, **kwargs
|
|
)
|
|
add_timeout_to_deferred(
|
|
request_deferred, 60, self.hs.get_reactor(),
|
|
cancelled_to_request_timed_out_error,
|
|
)
|
|
response = yield make_deferred_yieldable(request_deferred)
|
|
|
|
incoming_responses_counter.labels(method, response.code).inc()
|
|
logger.info(
|
|
"Received response to %s %s: %s",
|
|
method, redact_uri(uri), response.code
|
|
)
|
|
defer.returnValue(response)
|
|
except Exception as e:
|
|
incoming_responses_counter.labels(method, "ERR").inc()
|
|
logger.info(
|
|
"Error sending request to %s %s: %s %s",
|
|
method, redact_uri(uri), type(e).__name__, e.message
|
|
)
|
|
raise
|
|
|
|
@defer.inlineCallbacks
|
|
def post_urlencoded_get_json(self, uri, args={}, headers=None):
|
|
"""
|
|
Args:
|
|
uri (str):
|
|
args (dict[str, str|List[str]]): query params
|
|
headers (dict[str, List[str]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
|
|
Returns:
|
|
Deferred[object]: parsed json
|
|
|
|
Raises:
|
|
HttpResponseException: On a non-2xx HTTP response.
|
|
|
|
ValueError: if the response was not JSON
|
|
"""
|
|
|
|
# TODO: Do we ever want to log message contents?
|
|
logger.debug("post_urlencoded_get_json args: %s", args)
|
|
|
|
query_bytes = urllib.urlencode(encode_urlencode_args(args), True)
|
|
|
|
actual_headers = {
|
|
b"Content-Type": [b"application/x-www-form-urlencoded"],
|
|
b"User-Agent": [self.user_agent],
|
|
}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request(
|
|
"POST",
|
|
uri.encode("ascii"),
|
|
headers=Headers(actual_headers),
|
|
bodyProducer=FileBodyProducer(StringIO(query_bytes))
|
|
)
|
|
|
|
body = yield make_deferred_yieldable(readBody(response))
|
|
|
|
if 200 <= response.code < 300:
|
|
defer.returnValue(json.loads(body))
|
|
else:
|
|
raise HttpResponseException(response.code, response.phrase, body)
|
|
|
|
@defer.inlineCallbacks
|
|
def post_json_get_json(self, uri, post_json, headers=None):
|
|
"""
|
|
|
|
Args:
|
|
uri (str):
|
|
post_json (object):
|
|
headers (dict[str, List[str]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
|
|
Returns:
|
|
Deferred[object]: parsed json
|
|
|
|
Raises:
|
|
HttpResponseException: On a non-2xx HTTP response.
|
|
|
|
ValueError: if the response was not JSON
|
|
"""
|
|
json_str = encode_canonical_json(post_json)
|
|
|
|
logger.debug("HTTP POST %s -> %s", json_str, uri)
|
|
|
|
actual_headers = {
|
|
b"Content-Type": [b"application/json"],
|
|
b"User-Agent": [self.user_agent],
|
|
}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request(
|
|
"POST",
|
|
uri.encode("ascii"),
|
|
headers=Headers(actual_headers),
|
|
bodyProducer=FileBodyProducer(StringIO(json_str))
|
|
)
|
|
|
|
body = yield make_deferred_yieldable(readBody(response))
|
|
|
|
if 200 <= response.code < 300:
|
|
defer.returnValue(json.loads(body))
|
|
else:
|
|
raise HttpResponseException(response.code, response.phrase, body)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_json(self, uri, args={}, headers=None):
|
|
""" Gets some json from the given URI.
|
|
|
|
Args:
|
|
uri (str): The URI to request, not including query parameters
|
|
args (dict): A dictionary used to create query strings, defaults to
|
|
None.
|
|
**Note**: The value of each key is assumed to be an iterable
|
|
and *not* a string.
|
|
headers (dict[str, List[str]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
Returns:
|
|
Deferred: Succeeds when we get *any* 2xx HTTP response, with the
|
|
HTTP body as JSON.
|
|
Raises:
|
|
HttpResponseException On a non-2xx HTTP response.
|
|
|
|
ValueError: if the response was not JSON
|
|
"""
|
|
body = yield self.get_raw(uri, args, headers=headers)
|
|
defer.returnValue(json.loads(body))
|
|
|
|
@defer.inlineCallbacks
|
|
def put_json(self, uri, json_body, args={}, headers=None):
|
|
""" Puts some json to the given URI.
|
|
|
|
Args:
|
|
uri (str): The URI to request, not including query parameters
|
|
json_body (dict): The JSON to put in the HTTP body,
|
|
args (dict): A dictionary used to create query strings, defaults to
|
|
None.
|
|
**Note**: The value of each key is assumed to be an iterable
|
|
and *not* a string.
|
|
headers (dict[str, List[str]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
Returns:
|
|
Deferred: Succeeds when we get *any* 2xx HTTP response, with the
|
|
HTTP body as JSON.
|
|
Raises:
|
|
HttpResponseException On a non-2xx HTTP response.
|
|
|
|
ValueError: if the response was not JSON
|
|
"""
|
|
if len(args):
|
|
query_bytes = urllib.urlencode(args, True)
|
|
uri = "%s?%s" % (uri, query_bytes)
|
|
|
|
json_str = encode_canonical_json(json_body)
|
|
|
|
actual_headers = {
|
|
b"Content-Type": [b"application/json"],
|
|
b"User-Agent": [self.user_agent],
|
|
}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request(
|
|
"PUT",
|
|
uri.encode("ascii"),
|
|
headers=Headers(actual_headers),
|
|
bodyProducer=FileBodyProducer(StringIO(json_str))
|
|
)
|
|
|
|
body = yield make_deferred_yieldable(readBody(response))
|
|
|
|
if 200 <= response.code < 300:
|
|
defer.returnValue(json.loads(body))
|
|
else:
|
|
raise HttpResponseException(response.code, response.phrase, body)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_raw(self, uri, args={}, headers=None):
|
|
""" Gets raw text from the given URI.
|
|
|
|
Args:
|
|
uri (str): The URI to request, not including query parameters
|
|
args (dict): A dictionary used to create query strings, defaults to
|
|
None.
|
|
**Note**: The value of each key is assumed to be an iterable
|
|
and *not* a string.
|
|
headers (dict[str, List[str]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
Returns:
|
|
Deferred: Succeeds when we get *any* 2xx HTTP response, with the
|
|
HTTP body at text.
|
|
Raises:
|
|
HttpResponseException on a non-2xx HTTP response.
|
|
"""
|
|
if len(args):
|
|
query_bytes = urllib.urlencode(args, True)
|
|
uri = "%s?%s" % (uri, query_bytes)
|
|
|
|
actual_headers = {
|
|
b"User-Agent": [self.user_agent],
|
|
}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request(
|
|
"GET",
|
|
uri.encode("ascii"),
|
|
headers=Headers(actual_headers),
|
|
)
|
|
|
|
body = yield make_deferred_yieldable(readBody(response))
|
|
|
|
if 200 <= response.code < 300:
|
|
defer.returnValue(body)
|
|
else:
|
|
raise HttpResponseException(response.code, response.phrase, body)
|
|
|
|
# XXX: FIXME: This is horribly copy-pasted from matrixfederationclient.
|
|
# The two should be factored out.
|
|
|
|
@defer.inlineCallbacks
|
|
def get_file(self, url, output_stream, max_size=None, headers=None):
|
|
"""GETs a file from a given URL
|
|
Args:
|
|
url (str): The URL to GET
|
|
output_stream (file): File to write the response body to.
|
|
headers (dict[str, List[str]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
Returns:
|
|
A (int,dict,string,int) tuple of the file length, dict of the response
|
|
headers, absolute URI of the response and HTTP response code.
|
|
"""
|
|
|
|
actual_headers = {
|
|
b"User-Agent": [self.user_agent],
|
|
}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request(
|
|
"GET",
|
|
url.encode("ascii"),
|
|
headers=Headers(actual_headers),
|
|
)
|
|
|
|
resp_headers = dict(response.headers.getAllRawHeaders())
|
|
|
|
if 'Content-Length' in resp_headers and resp_headers['Content-Length'] > max_size:
|
|
logger.warn("Requested URL is too large > %r bytes" % (self.max_size,))
|
|
raise SynapseError(
|
|
502,
|
|
"Requested file is too large > %r bytes" % (self.max_size,),
|
|
Codes.TOO_LARGE,
|
|
)
|
|
|
|
if response.code > 299:
|
|
logger.warn("Got %d when downloading %s" % (response.code, url))
|
|
raise SynapseError(
|
|
502,
|
|
"Got error %d" % (response.code,),
|
|
Codes.UNKNOWN,
|
|
)
|
|
|
|
# TODO: if our Content-Type is HTML or something, just read the first
|
|
# N bytes into RAM rather than saving it all to disk only to read it
|
|
# straight back in again
|
|
|
|
try:
|
|
length = yield make_deferred_yieldable(_readBodyToFile(
|
|
response, output_stream, max_size,
|
|
))
|
|
except Exception as e:
|
|
logger.exception("Failed to download body")
|
|
raise SynapseError(
|
|
502,
|
|
("Failed to download remote body: %s" % e),
|
|
Codes.UNKNOWN,
|
|
)
|
|
|
|
defer.returnValue(
|
|
(length, resp_headers, response.request.absoluteURI, response.code),
|
|
)
|
|
|
|
|
|
# XXX: FIXME: This is horribly copy-pasted from matrixfederationclient.
|
|
# The two should be factored out.
|
|
|
|
class _ReadBodyToFileProtocol(protocol.Protocol):
|
|
def __init__(self, stream, deferred, max_size):
|
|
self.stream = stream
|
|
self.deferred = deferred
|
|
self.length = 0
|
|
self.max_size = max_size
|
|
|
|
def dataReceived(self, data):
|
|
self.stream.write(data)
|
|
self.length += len(data)
|
|
if self.max_size is not None and self.length >= self.max_size:
|
|
self.deferred.errback(SynapseError(
|
|
502,
|
|
"Requested file is too large > %r bytes" % (self.max_size,),
|
|
Codes.TOO_LARGE,
|
|
))
|
|
self.deferred = defer.Deferred()
|
|
self.transport.loseConnection()
|
|
|
|
def connectionLost(self, reason):
|
|
if reason.check(ResponseDone):
|
|
self.deferred.callback(self.length)
|
|
elif reason.check(PotentialDataLoss):
|
|
# stolen from https://github.com/twisted/treq/pull/49/files
|
|
# http://twistedmatrix.com/trac/ticket/4840
|
|
self.deferred.callback(self.length)
|
|
else:
|
|
self.deferred.errback(reason)
|
|
|
|
|
|
# XXX: FIXME: This is horribly copy-pasted from matrixfederationclient.
|
|
# The two should be factored out.
|
|
|
|
def _readBodyToFile(response, stream, max_size):
|
|
d = defer.Deferred()
|
|
response.deliverBody(_ReadBodyToFileProtocol(stream, d, max_size))
|
|
return d
|
|
|
|
|
|
class CaptchaServerHttpClient(SimpleHttpClient):
|
|
"""
|
|
Separate HTTP client for talking to google's captcha servers
|
|
Only slightly special because accepts partial download responses
|
|
|
|
used only by c/s api v1
|
|
"""
|
|
|
|
@defer.inlineCallbacks
|
|
def post_urlencoded_get_raw(self, url, args={}):
|
|
query_bytes = urllib.urlencode(encode_urlencode_args(args), True)
|
|
|
|
response = yield self.request(
|
|
"POST",
|
|
url.encode("ascii"),
|
|
bodyProducer=FileBodyProducer(StringIO(query_bytes)),
|
|
headers=Headers({
|
|
b"Content-Type": [b"application/x-www-form-urlencoded"],
|
|
b"User-Agent": [self.user_agent],
|
|
})
|
|
)
|
|
|
|
try:
|
|
body = yield make_deferred_yieldable(readBody(response))
|
|
defer.returnValue(body)
|
|
except PartialDownloadError as e:
|
|
# twisted dislikes google's response, no content length.
|
|
defer.returnValue(e.response)
|
|
|
|
|
|
class SpiderEndpointFactory(object):
|
|
def __init__(self, hs):
|
|
self.blacklist = hs.config.url_preview_ip_range_blacklist
|
|
self.whitelist = hs.config.url_preview_ip_range_whitelist
|
|
self.policyForHTTPS = hs.get_http_client_context_factory()
|
|
|
|
def endpointForURI(self, uri):
|
|
logger.info("Getting endpoint for %s", uri.toBytes())
|
|
|
|
if uri.scheme == "http":
|
|
endpoint_factory = HostnameEndpoint
|
|
elif uri.scheme == "https":
|
|
tlsCreator = self.policyForHTTPS.creatorForNetloc(uri.host, uri.port)
|
|
|
|
def endpoint_factory(reactor, host, port, **kw):
|
|
return wrapClientTLS(
|
|
tlsCreator,
|
|
HostnameEndpoint(reactor, host, port, **kw))
|
|
else:
|
|
logger.warn("Can't get endpoint for unrecognised scheme %s", uri.scheme)
|
|
return None
|
|
return SpiderEndpoint(
|
|
reactor, uri.host, uri.port, self.blacklist, self.whitelist,
|
|
endpoint=endpoint_factory, endpoint_kw_args=dict(timeout=15),
|
|
)
|
|
|
|
|
|
class SpiderHttpClient(SimpleHttpClient):
|
|
"""
|
|
Separate HTTP client for spidering arbitrary URLs.
|
|
Special in that it follows retries and has a UA that looks
|
|
like a browser.
|
|
|
|
used by the preview_url endpoint in the content repo.
|
|
"""
|
|
def __init__(self, hs):
|
|
SimpleHttpClient.__init__(self, hs)
|
|
# clobber the base class's agent and UA:
|
|
self.agent = ContentDecoderAgent(
|
|
BrowserLikeRedirectAgent(
|
|
Agent.usingEndpointFactory(
|
|
reactor,
|
|
SpiderEndpointFactory(hs)
|
|
)
|
|
), [(b'gzip', GzipDecoder)]
|
|
)
|
|
# We could look like Chrome:
|
|
# self.user_agent = ("Mozilla/5.0 (%s) (KHTML, like Gecko)
|
|
# Chrome Safari" % hs.version_string)
|
|
|
|
|
|
def encode_urlencode_args(args):
|
|
return {k: encode_urlencode_arg(v) for k, v in args.items()}
|
|
|
|
|
|
def encode_urlencode_arg(arg):
|
|
if isinstance(arg, unicode):
|
|
return arg.encode('utf-8')
|
|
elif isinstance(arg, list):
|
|
return [encode_urlencode_arg(i) for i in arg]
|
|
else:
|
|
return arg
|
|
|
|
|
|
def _print_ex(e):
|
|
if hasattr(e, "reasons") and e.reasons:
|
|
for ex in e.reasons:
|
|
_print_ex(ex)
|
|
else:
|
|
logger.exception(e)
|
|
|
|
|
|
class InsecureInterceptableContextFactory(ssl.ContextFactory):
|
|
"""
|
|
Factory for PyOpenSSL SSL contexts which accepts any certificate for any domain.
|
|
|
|
Do not use this since it allows an attacker to intercept your communications.
|
|
"""
|
|
|
|
def __init__(self):
|
|
self._context = SSL.Context(SSL.SSLv23_METHOD)
|
|
self._context.set_verify(VERIFY_NONE, lambda *_: None)
|
|
|
|
def getContext(self, hostname=None, port=None):
|
|
return self._context
|
|
|
|
def creatorForNetloc(self, hostname, port):
|
|
return self
|
|
|
|
|
|
class FileBodyProducer(TwistedFileBodyProducer):
|
|
"""Workaround for https://twistedmatrix.com/trac/ticket/8473
|
|
|
|
We override the pauseProducing and resumeProducing methods in twisted's
|
|
FileBodyProducer so that they do not raise exceptions if the task has
|
|
already completed.
|
|
"""
|
|
|
|
def pauseProducing(self):
|
|
try:
|
|
super(FileBodyProducer, self).pauseProducing()
|
|
except task.TaskDone:
|
|
# task has already completed
|
|
pass
|
|
|
|
def resumeProducing(self):
|
|
try:
|
|
super(FileBodyProducer, self).resumeProducing()
|
|
except task.NotPaused:
|
|
# task was not paused (probably because it had already completed)
|
|
pass
|