52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
###############################################################################
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##
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## Copyright 2011 Tavendo GmbH
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##
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## Licensed under the Apache License, Version 2.0 (the "License");
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## you may not use this file except in compliance with the License.
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## You may obtain a copy of the License at
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##
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## http://www.apache.org/licenses/LICENSE-2.0
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##
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## Unless required by applicable law or agreed to in writing, software
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## distributed under the License is distributed on an "AS IS" BASIS,
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## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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## See the License for the specific language governing permissions and
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## limitations under the License.
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##
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###############################################################################
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import hashlib
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from twisted.internet import reactor
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from autobahn.websocket import WebSocketServerFactory, WebSocketServerProtocol, listenWS
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class FrameBasedHashServerProtocol(WebSocketServerProtocol):
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"""
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Frame-based WebSockets server that computes a running SHA-256 for message data
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received. It will respond after every frame received with the digest computed
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up to that point. It can receive messages of unlimited number of frames.
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Digest is reset upon new message.
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"""
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def onMessageBegin(self, opcode):
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WebSocketServerProtocol.onMessageBegin(self, opcode)
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self.sha256 = hashlib.sha256()
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def onMessageFrame(self, payload, reserved):
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data = ''.join(payload)
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self.sha256.update(data)
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digest = self.sha256.hexdigest()
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self.sendMessage(digest)
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print "Sent digest for frame: %s" % digest
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def onMessageEnd(self):
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pass
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if __name__ == '__main__':
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factory = WebSocketServerFactory("ws://localhost:9000")
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factory.protocol = FrameBasedHashServerProtocol
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listenWS(factory)
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reactor.run()
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