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# 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 re
from six import StringIO
from twisted.internet.defer import Deferred
from twisted.python.failure import Failure
from twisted.test.proto_helpers import AccumulatingProtocol
from twisted.web.resource import Resource
from twisted.web.server import NOT_DONE_YET
from synapse.api.errors import Codes, SynapseError
from synapse.http.server import JsonResource
from synapse.http.site import SynapseSite, logger
from synapse.logging.context import make_deferred_yieldable
from synapse.util import Clock
from tests import unittest
from tests.server import (
FakeTransport,
ThreadedMemoryReactorClock,
make_request,
render,
setup_test_homeserver,
)
class JsonResourceTests(unittest.TestCase):
def setUp(self):
self.reactor = ThreadedMemoryReactorClock()
self.hs_clock = Clock(self.reactor)
self.homeserver = setup_test_homeserver(
self.addCleanup, http_client=None, clock=self.hs_clock, reactor=self.reactor
)
def test_handler_for_request(self):
"""
JsonResource.handler_for_request gives correctly decoded URL args to
the callback, while Twisted will give the raw bytes of URL query
arguments.
"""
got_kwargs = {}
def _callback(request, **kwargs):
got_kwargs.update(kwargs)
return (200, kwargs)
res = JsonResource(self.homeserver)
res.register_paths(
"GET",
[re.compile("^/_matrix/foo/(?P<room_id>[^/]*)$")],
_callback,
"test_servlet",
)
request, channel = make_request(
self.reactor, b"GET", b"/_matrix/foo/%E2%98%83?a=%E2%98%83"
)
render(request, res, self.reactor)
self.assertEqual(request.args, {b"a": ["\N{SNOWMAN}".encode("utf8")]})
self.assertEqual(got_kwargs, {"room_id": "\N{SNOWMAN}"})
def test_callback_direct_exception(self):
"""
If the web callback raises an uncaught exception, it will be translated
into a 500.
"""
def _callback(request, **kwargs):
raise Exception("boo")
res = JsonResource(self.homeserver)
res.register_paths(
"GET", [re.compile("^/_matrix/foo$")], _callback, "test_servlet"
)
request, channel = make_request(self.reactor, b"GET", b"/_matrix/foo")
render(request, res, self.reactor)
self.assertEqual(channel.result["code"], b"500")
def test_callback_indirect_exception(self):
"""
If the web callback raises an uncaught exception in a Deferred, it will
be translated into a 500.
"""
def _throw(*args):
raise Exception("boo")
def _callback(request, **kwargs):
d = Deferred()
d.addCallback(_throw)
self.reactor.callLater(1, d.callback, True)
return make_deferred_yieldable(d)
res = JsonResource(self.homeserver)
res.register_paths(
"GET", [re.compile("^/_matrix/foo$")], _callback, "test_servlet"
)
request, channel = make_request(self.reactor, b"GET", b"/_matrix/foo")
render(request, res, self.reactor)
self.assertEqual(channel.result["code"], b"500")
def test_callback_synapseerror(self):
"""
If the web callback raises a SynapseError, it returns the appropriate
status code and message set in it.
"""
def _callback(request, **kwargs):
raise SynapseError(403, "Forbidden!!one!", Codes.FORBIDDEN)
res = JsonResource(self.homeserver)
res.register_paths(
"GET", [re.compile("^/_matrix/foo$")], _callback, "test_servlet"
)
request, channel = make_request(self.reactor, b"GET", b"/_matrix/foo")
render(request, res, self.reactor)
self.assertEqual(channel.result["code"], b"403")
self.assertEqual(channel.json_body["error"], "Forbidden!!one!")
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
def test_no_handler(self):
"""
If there is no handler to process the request, Synapse will return 400.
"""
def _callback(request, **kwargs):
"""
Not ever actually called!
"""
self.fail("shouldn't ever get here")
res = JsonResource(self.homeserver)
res.register_paths(
"GET", [re.compile("^/_matrix/foo$")], _callback, "test_servlet"
)
request, channel = make_request(self.reactor, b"GET", b"/_matrix/foobar")
render(request, res, self.reactor)
self.assertEqual(channel.result["code"], b"400")
self.assertEqual(channel.json_body["error"], "Unrecognized request")
self.assertEqual(channel.json_body["errcode"], "M_UNRECOGNIZED")
class SiteTestCase(unittest.HomeserverTestCase):
def test_lose_connection(self):
"""
We log the URI correctly redacted when we lose the connection.
"""
class HangingResource(Resource):
"""
A Resource that strategically hangs, as if it were processing an
answer.
"""
def render(self, request):
return NOT_DONE_YET
# Set up a logging handler that we can inspect afterwards
output = StringIO()
handler = logging.StreamHandler(output)
logger.addHandler(handler)
old_level = logger.level
logger.setLevel(10)
self.addCleanup(logger.setLevel, old_level)
self.addCleanup(logger.removeHandler, handler)
# Make a resource and a Site, the resource will hang and allow us to
# time out the request while it's 'processing'
base_resource = Resource()
base_resource.putChild(b"", HangingResource())
site = SynapseSite("test", "site_tag", {}, base_resource, "1.0")
server = site.buildProtocol(None)
client = AccumulatingProtocol()
client.makeConnection(FakeTransport(server, self.reactor))
server.makeConnection(FakeTransport(client, self.reactor))
# Send a request with an access token that will get redacted
server.dataReceived(b"GET /?access_token=bar HTTP/1.0\r\n\r\n")
self.pump()
# Lose the connection
e = Failure(Exception("Failed123"))
server.connectionLost(e)
handler.flush()
# Our access token is redacted and the failure reason is logged.
self.assertIn("/?access_token=<redacted>", output.getvalue())
self.assertIn("Failed123", output.getvalue())
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