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