python手记-twisted(2)

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本文介绍如何使用Xshell进行远程连接操作，并展示了一个简单的Telnet客户端交互过程。此外，通过Python Twisted框架实现了一个简易的回显服务器，该服务器能够接收客户端消息并反馈，遇到特定命令则关闭连接。

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关闭连接

Xshell 5 (Build 0655)
Copyright (c) 2002-2015 NetSarang Computer, Inc. All rights reserved.

Type `help' to learn how to use Xshell prompt.
[c:\~]$ telnet 120.55.*.* 8001

Connecting to 120.55.*.*:8001...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.
hello
hello
world
world
quit
Connection closed by foreign host.

Disconnected from remote host(120.55.69.31:8001) at 17:45:33.

Type `help' to learn how to use Xshell prompt.

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http://blog.youkuaiyun.com/myhaspl/

如果输入quit则关闭连接，通过下面语句

self.transport.loseConnection()

protocol不保存永久数据，每个连接初始化生成protocol实例，连接关闭时退出。而永久数据由factory负责

^C[myhaspl@iZ23mdqdp94Z ~]$ cat  learn/l1/myserver.pl
from twisted.internet.protocol import Protocol
from twisted.internet import reactor
from twisted.internet.protocol import Factory
from twisted.internet.endpoints import TCP4ServerEndpoint

class Echo(Protocol):
    
     def dataReceived(self,data):
         if data!="quit":
              self.transport.write(data)
         else:
              self.transport.loseConnection()

class EchoFactory(Factory):
     def buildProtocol(self,addr):
          return Echo()    

endpoint=TCP4ServerEndpoint(reactor,8001)
endpoint.listen(EchoFactory())
reactor.run()