Python network programming (twisted-based client programming)
Python's twisted is interesting. It can be used for server programming or client programming. Echo is the simplest example of programming.
The client code is as follows,
#!/usr/bin/pythonfrom twisted.internet.protocol import Protocol, ClientFactoryfrom sys import stdoutfrom twisted.internet import reactorclass Echo(Protocol):def dataReceived(self, data):stdout.write(data) class EchoClientFactory(ClientFactory):def startedConnecting(self, connector):print 'Started to connect.' def buildProtocol(self, addr):print 'Connected.'return Echo() def clientConnectionLost(self, connector, reason):print 'Lost connection. Reason:', reasondef clientConnectionFailed(self, connector, reason):print 'Connection failed. Reason:', reasonif __name__ == '__main__':reactor.connectTCP('localhost', 1234, EchoClientFactory())reactor.run()
The server code is as follows,
#!/usr/bin/pythonfrom twisted.internet import protocol, reactor, endpointsclass Echo(protocol.Protocol): def dataReceived(self, data): self.transport.write(data)class EchoFactory(protocol.Factory): def buildProtocol(self, addr): return Echo()if __name__ == '__main__': endpoints.serverFromString(reactor, "tcp:1234").listen(EchoFactory()) reactor.run()