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###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) Crossbar.io Technologies 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.
#
###############################################################################
import hashlib
from ranstring import randomByteString
from twisted.internet import reactor
from autobahn.twisted.websocket import WebSocketClientFactory, \
WebSocketClientProtocol, \
connectWS
FRAME_SIZE = 1 * 2**20
FRAME_COUNT = 10
class FrameBasedHashClientProtocol(WebSocketClientProtocol):
"""
Message-based WebSockets client that generates stream of random octets
sent to WebSockets server as a sequence of frames all in one message.
The server will respond to us with the SHA-256 computed over frames.
When we receive response, we repeat by sending a new frame.
"""
def sendOneFrame(self):
data = randomByteString(FRAME_SIZE)
self.sha256.update(data)
digest = self.sha256.hexdigest()
print("Digest for frame {} computed by client: {}".format(self.count, digest))
self.sendMessageFrame(data)
def onOpen(self):
self.count = 0
self.finished = False
self.beginMessage(isBinary=True)
self.sha256 = hashlib.sha256()
self.sendOneFrame()
def onMessage(self, payload, isBinary):
print("Digest for frame {} computed by server: {}".format(self.count, payload.decode('utf8')))
self.count += 1
if self.count < FRAME_COUNT:
self.sendOneFrame()
elif not self.finished:
self.endMessage()
self.finished = True
if self.count >= FRAME_COUNT:
self.sendClose()
def onClose(self, wasClean, code, reason):
reactor.stop()
if __name__ == '__main__':
factory = WebSocketClientFactory(u"ws://127.0.0.1:9000")
factory.protocol = FrameBasedHashClientProtocol
enableCompression = False
if enableCompression:
from autobahn.websocket.compress import PerMessageDeflateOffer, \
PerMessageDeflateResponse, \
PerMessageDeflateResponseAccept
# The extensions offered to the server ..
offers = [PerMessageDeflateOffer()]
factory.setProtocolOptions(perMessageCompressionOffers=offers)
# Function to accept responses from the server ..
def accept(response):
if isinstance(response, PerMessageDeflateResponse):
return PerMessageDeflateResponseAccept(response)
factory.setProtocolOptions(perMessageCompressionAccept=accept)
connectWS(factory)
reactor.run()
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