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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket 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 json
import urllib
from pprint import pformat
from twisted.internet import defer, reactor
from twisted.web.client import Agent, readBody
from twisted.web.http_headers import Headers
class HttpClient:
"""Interface for talking json over http"""
def put_json(self, url, data):
"""Sends the specifed json data using PUT
Args:
url (str): The URL to PUT data to.
data (dict): A dict containing the data that will be used as
the request body. This will be encoded as JSON.
Returns:
Deferred: Succeeds when we get a 2xx HTTP response. The result
will be the decoded JSON body.
"""
pass
def get_json(self, url, args=None):
"""Gets some json from the given host homeserver and path
Args:
url (str): The URL to GET data from.
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.
Returns:
Deferred: Succeeds when we get a 2xx HTTP response. The result
will be the decoded JSON body.
"""
pass
class TwistedHttpClient(HttpClient):
"""Wrapper around the twisted HTTP client api.
Attributes:
agent (twisted.web.client.Agent): The twisted Agent used to send the
requests.
"""
def __init__(self):
self.agent = Agent(reactor)
@defer.inlineCallbacks
def put_json(self, url, data):
response = yield self._create_put_request(
url, data, headers_dict={"Content-Type": ["application/json"]}
)
body = yield readBody(response)
defer.returnValue((response.code, body))
@defer.inlineCallbacks
def get_json(self, url, args=None):
if args:
# generates a list of strings of form "k=v".
qs = urllib.urlencode(args, True)
url = "%s?%s" % (url, qs)
response = yield self._create_get_request(url)
body = yield readBody(response)
defer.returnValue(json.loads(body))
def _create_put_request(self, url, json_data, headers_dict={}):
"""Wrapper of _create_request to issue a PUT request"""
if "Content-Type" not in headers_dict:
raise defer.error(RuntimeError("Must include Content-Type header for PUTs"))
return self._create_request(
"PUT", url, producer=_JsonProducer(json_data), headers_dict=headers_dict
)
def _create_get_request(self, url, headers_dict={}):
"""Wrapper of _create_request to issue a GET request"""
return self._create_request("GET", url, headers_dict=headers_dict)
@defer.inlineCallbacks
def do_request(
self, method, url, data=None, qparams=None, jsonreq=True, headers={}
):
if qparams:
url = "%s?%s" % (url, urllib.urlencode(qparams, True))
if jsonreq:
prod = _JsonProducer(data)
headers["Content-Type"] = ["application/json"]
else:
prod = _RawProducer(data)
if method in ["POST", "PUT"]:
response = yield self._create_request(
method, url, producer=prod, headers_dict=headers
)
else:
response = yield self._create_request(method, url)
body = yield readBody(response)
defer.returnValue(json.loads(body))
@defer.inlineCallbacks
def _create_request(self, method, url, producer=None, headers_dict={}):
"""Creates and sends a request to the given url"""
headers_dict["User-Agent"] = ["Synapse Cmd Client"]
retries_left = 5
print("%s to %s with headers %s" % (method, url, headers_dict))
if self.verbose and producer:
if "password" in producer.data:
temp = producer.data["password"]
producer.data["password"] = "[REDACTED]"
print(json.dumps(producer.data, indent=4))
producer.data["password"] = temp
else:
print(json.dumps(producer.data, indent=4))
while True:
try:
response = yield self.agent.request(
method, url.encode("UTF8"), Headers(headers_dict), producer
)
break
except Exception as e:
print("uh oh: %s" % e)
if retries_left:
yield self.sleep(2 ** (5 - retries_left))
retries_left -= 1
else:
raise e
if self.verbose:
print("Status %s %s" % (response.code, response.phrase))
print(pformat(list(response.headers.getAllRawHeaders())))
defer.returnValue(response)
def sleep(self, seconds):
d = defer.Deferred()
reactor.callLater(seconds, d.callback, seconds)
return d
class _RawProducer:
def __init__(self, data):
self.data = data
self.body = data
self.length = len(self.body)
def startProducing(self, consumer):
consumer.write(self.body)
return defer.succeed(None)
def pauseProducing(self):
pass
def stopProducing(self):
pass
class _JsonProducer:
"""Used by the twisted http client to create the HTTP body from json"""
def __init__(self, jsn):
self.data = jsn
self.body = json.dumps(jsn).encode("utf8")
self.length = len(self.body)
def startProducing(self, consumer):
consumer.write(self.body)
return defer.succeed(None)
def pauseProducing(self):
pass
def stopProducing(self):
pass
|
