Python Twisted

#!/usr/bin/env python
# -*- coding:utf-8 -*-

# event_drive.py

event_list = []


def run():
    for event in event_list:
        obj = event()
        obj.execute()


class BaseHandler(object):
    """
    用户必须继承该类，从而规范所有类的方法（类似于接口的功能）
    """
    def execute(self):
        raise Exception('you must overwrite execute')

#!/usr/bin/env python
# -*- coding:utf-8 -*-

from source import event_drive


class MyHandler(event_drive.BaseHandler):

    def execute(self):
        print 'event-drive execute MyHandler'


event_drive.event_list.append(MyHandler)
event_drive.run()

makeConnection               在transport对象和服务器之间建立一条连接
connectionMade               连接建立起来后调用
dataReceived                 接收数据时调用
connectionLost               关闭连接时调用

write                   以非阻塞的方式按顺序依次将数据写到物理连接上
writeSequence           将一个字符串列表写到物理连接上
loseConnection          将所有挂起的数据写入，然后关闭连接
getPeer                 取得连接中对端的地址信息
getHost                 取得连接中本端的地址信息

from twisted.internet import protocol
from twisted.internet import reactor

class Echo(protocol.Protocol):
    def dataReceived(self, data):   # 只要twisted已收到数据就会把数据返回
        self.transport.write(data)

def main():
    factory = protocol.ServerFactory()
    factory.protocol = Echo

    reactor.listenTCP(1234,factory)
    reactor.run()

if __name__ == '__main__':
    main()

from twisted.internet import reactor, protocol

class EchoClient(protocol.Protocol):
    """Once connected, send a message, then print the result."""

    def connectionMade(self):     # 只要建立连接成功就会执行此方法
        self.transport.write("hello alex!")

    def dataReceived(self, data):  # 只要收到数据就会调用此方法
        "As soon as any data is received, write it back."
        print("Server said:", data)
        self.transport.loseConnection()  # 如果数据未传完则等数据传输完毕后再调用此方法connectionLost

    def connectionLost(self, reason):
        print("connection lost")

class EchoFactory(protocol.ClientFactory):
    protocol = EchoClient

    def clientConnectionFailed(self, connector, reason):   # 如果连接不上就会调用此方法
        print("Connection failed - goodbye!")
        reactor.stop()       # 连接失败则关闭

    def clientConnectionLost(self, connector, reason):   # 如果连接过程中断开则执行此方法
        print("Connection lost - goodbye!")
        reactor.stop()     # 连接中断关闭


# this connects the protocol to a server running on port 8000
def main():
    f = EchoFactory()
    reactor.connectTCP("localhost", 1234, f)
    reactor.run()

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