###############################################################################
#
# The MIT License (MIT)
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# Copyright (c) Crossbar.io Technologies GmbH
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# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
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import sys

from twisted.internet import reactor
from twisted.python import log

from autobahn.twisted.websocket import WebSocketClientProtocol, \
    WebSocketClientFactory, \
    connectWS


class EchoClientProtocol(WebSocketClientProtocol):

    def sendHello(self):
        self.sendMessage("Hello, world!".encode('utf8'))

    def onOpen(self):
        self.sendHello()

    def onMessage(self, payload, isBinary):
        if not isBinary:
            print("Text message received: {}".format(payload.decode('utf8')))
        reactor.callLater(1, self.sendHello)


if __name__ == '__main__':

    if len(sys.argv) < 2:
        print("Need the WebSocket server address, i.e. ws://127.0.0.1:9000")
        sys.exit(1)

    log.startLogging(sys.stdout)

    factory = WebSocketClientFactory(sys.argv[1])
    factory.protocol = EchoClientProtocol
    connectWS(factory)

    reactor.run()
