echoclient.py

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
An example client. Run simpleserv.py first before running this.
"""
from twisted.internet import reactor, protocol
# a client protocol

class EchoClient(protocol.Protocol):
    """Once connected, send a message, then print the result."""
    
    def connectionMade(self):
        self.transport.write(b"hello, world!")
    
    def dataReceived(self, data):
        "As soon as any data is received, write it back."
        print ("Server said:", data)
        self.transport.loseConnection()
    
    def connectionLost(self, reason):
        print ("connection lost")

class EchoFactory(protocol.ClientFactory):
    protocol = EchoClient

    def clientConnectionFailed(self, connector, reason):
        print ("Connection failed - goodbye!")
        reactor.stop()
    
    def clientConnectionLost(self, connector, reason):
        print ("Connection lost - goodbye!")
        reactor.stop()

# this connects the protocol to a server runing on port 8000
def main():
    f = EchoFactory()
    reactor.connectTCP("localhost", 8000, f)
    reactor.run()

# this only runs if the module was *not* imported
if __name__ == '__main__':
    main()