1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
# Copyright 2020 The Matrix.org Foundation C.I.C.
#
# 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 unittest.mock import Mock
from netaddr import IPSet
from twisted.internet import defer
from twisted.internet.error import DNSLookupError
from synapse.http import RequestTimedOutError
from synapse.http.client import SimpleHttpClient
from synapse.server import HomeServer
from tests.unittest import HomeserverTestCase
class SimpleHttpClientTests(HomeserverTestCase):
def prepare(self, reactor, clock, hs: "HomeServer"):
# Add a DNS entry for a test server
self.reactor.lookups["testserv"] = "1.2.3.4"
self.cl = hs.get_simple_http_client()
def test_dns_error(self):
"""
If the DNS lookup returns an error, it will bubble up.
"""
d = defer.ensureDeferred(self.cl.get_json("http://testserv2:8008/foo/bar"))
self.pump()
f = self.failureResultOf(d)
self.assertIsInstance(f.value, DNSLookupError)
def test_client_connection_refused(self):
d = defer.ensureDeferred(self.cl.get_json("http://testserv:8008/foo/bar"))
self.pump()
# Nothing happened yet
self.assertNoResult(d)
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 1)
(host, port, factory, _timeout, _bindAddress) = clients[0]
self.assertEqual(host, "1.2.3.4")
self.assertEqual(port, 8008)
e = Exception("go away")
factory.clientConnectionFailed(None, e)
self.pump(0.5)
f = self.failureResultOf(d)
self.assertIs(f.value, e)
def test_client_never_connect(self):
"""
If the HTTP request is not connected and is timed out, it'll give a
ConnectingCancelledError or TimeoutError.
"""
d = defer.ensureDeferred(self.cl.get_json("http://testserv:8008/foo/bar"))
self.pump()
# Nothing happened yet
self.assertNoResult(d)
# Make sure treq is trying to connect
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 1)
self.assertEqual(clients[0][0], "1.2.3.4")
self.assertEqual(clients[0][1], 8008)
# Deferred is still without a result
self.assertNoResult(d)
# Push by enough to time it out
self.reactor.advance(120)
f = self.failureResultOf(d)
self.assertIsInstance(f.value, RequestTimedOutError)
def test_client_connect_no_response(self):
"""
If the HTTP request is connected, but gets no response before being
timed out, it'll give a ResponseNeverReceived.
"""
d = defer.ensureDeferred(self.cl.get_json("http://testserv:8008/foo/bar"))
self.pump()
# Nothing happened yet
self.assertNoResult(d)
# Make sure treq is trying to connect
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 1)
self.assertEqual(clients[0][0], "1.2.3.4")
self.assertEqual(clients[0][1], 8008)
conn = Mock()
client = clients[0][2].buildProtocol(None)
client.makeConnection(conn)
# Deferred is still without a result
self.assertNoResult(d)
# Push by enough to time it out
self.reactor.advance(120)
f = self.failureResultOf(d)
self.assertIsInstance(f.value, RequestTimedOutError)
def test_client_ip_range_blacklist(self):
"""Ensure that Synapse does not try to connect to blacklisted IPs"""
# Add some DNS entries we'll blacklist
self.reactor.lookups["internal"] = "127.0.0.1"
self.reactor.lookups["internalv6"] = "fe80:0:0:0:0:8a2e:370:7337"
ip_blacklist = IPSet(["127.0.0.0/8", "fe80::/64"])
cl = SimpleHttpClient(self.hs, ip_blacklist=ip_blacklist)
# Try making a GET request to a blacklisted IPv4 address
# ------------------------------------------------------
# Make the request
d = defer.ensureDeferred(cl.get_json("http://internal:8008/foo/bar"))
self.pump(1)
# Check that it was unable to resolve the address
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 0)
self.failureResultOf(d, DNSLookupError)
# Try making a POST request to a blacklisted IPv6 address
# -------------------------------------------------------
# Make the request
d = defer.ensureDeferred(
cl.post_json_get_json("http://internalv6:8008/foo/bar", {})
)
# Move the reactor forwards
self.pump(1)
# Check that it was unable to resolve the address
clients = self.reactor.tcpClients
self.assertEqual(len(clients), 0)
# Check that it was due to a blacklisted DNS lookup
self.failureResultOf(d, DNSLookupError)
# Try making a GET request to a non-blacklisted IPv4 address
# ----------------------------------------------------------
# Make the request
d = defer.ensureDeferred(cl.get_json("http://testserv:8008/foo/bar"))
# Nothing has happened yet
self.assertNoResult(d)
# Move the reactor forwards
self.pump(1)
# Check that it was able to resolve the address
clients = self.reactor.tcpClients
self.assertNotEqual(len(clients), 0)
# Connection will still fail as this IP address does not resolve to anything
self.failureResultOf(d, RequestTimedOutError)
|
