# This tests the twisted module

from twisted.internet import reactor, protocol

# Server #

class Echo(protocol.Protocol):

"""This is just about the simplest possible protocol"""

def dataReceived(self, data):

"As soon as any data is received, write it back."

print('[Server] Received: "' + str(data) + '" from ' + str(self.transport.getPeer()))

self.transport.write(data)

def setupServer():

"""This runs the protocol on port 8000"""

factory = protocol.ServerFactory()

factory.protocol = Echo

reactor.listenTCP(8000,factory)

# Client #

class EchoClient(protocol.Protocol):

"""Once connected, send a message, then print the result."""

def connectionMade(self):

print('[Client] Starting! My Ip-address: ' + str(self.transport.getHost()))

print('[Client] Sending message to server...')

self.transport.write("hello, world!")

def dataReceived(self, data):

"As soon as any data is received, write it back."

print('[Client] Server said: "' + str(data) + '"')

print('[Client] Terminating connection...')

self.transport.loseConnection()

def connectionLost(self, reason):

print('[Client] Connection closed.')

class EchoFactory(protocol.ClientFactory):

protocol = EchoClient

def clientConnectionFailed(self, connector, reason):

print('[Client] Connection failed!')

reactor.stop()

def clientConnectionLost(self, connector, reason):

print('[Client] Connection lost.')

reactor.stop()

def setupClient():

f = EchoFactory()

reactor.connectTCP("localhost", 8000, f)

# Main #

def run():

setupServer()

setupClient()

reactor.run()