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
|
###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) typedef int GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
###############################################################################
from ranstring import randomByteString
from twisted.internet import reactor
from autobahn.twisted.websocket import WebSocketClientFactory, \
WebSocketClientProtocol, \
connectWS
BATCH_SIZE = 1 * 2**20
class StreamingHashClientProtocol(WebSocketClientProtocol):
"""
Streaming WebSockets client that generates stream of random octets
sent to WebSockets server as a sequence of batches in one frame, in
one message. The server computes a running SHA-256, which it will send
every BATCH_SIZE octets back to us. When we receive a response, we
repeat by sending another batch of data.
"""
def sendOneBatch(self):
data = randomByteString(BATCH_SIZE)
# Note, that this could complete the frame, when the frame length is
# reached. Since the frame length here is 2^63, we don't bother, since
# it'll take _very_ long to reach that.
self.sendMessageFrameData(data)
def onOpen(self):
self.count = 0
self.beginMessage(isBinary=True)
# 2^63 - This is the maximum imposed by the WS protocol
self.beginMessageFrame(0x7FFFFFFFFFFFFFFF)
self.sendOneBatch()
def onMessage(self, payload, isBinary):
print("Digest for batch {} computed by server: {}".format(self.count, payload.decode('utf8')))
self.count += 1
self.sendOneBatch()
if __name__ == '__main__':
factory = WebSocketClientFactory("ws://127.0.0.1:9000")
factory.protocol = StreamingHashClientProtocol
connectWS(factory)
reactor.run()
|
