考虑用LineReceiver实现一个机器人

红太狼 2022-03-28 08:16 166阅读 0赞

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       <em>发表于 2009-9-24 15:34:58</em> 
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          <td>如果我们把网络的命令抽象出来, 所有的网络服务基本上都一样, 除了服务端口不同而已.<br> <br> LineReceiver类就是帮助封装这些命令的.<br> <br> <br> <br> 考虑用LineReceiver实现一个机器人.<br> <br> <br> &nbsp; &nbsp;1.<br> &nbsp; &nbsp;2. # -*- coding: utf-8 -*-<br> &nbsp; &nbsp;3.<br> &nbsp; &nbsp;4. from twisted.protocols.basic import LineReceiver<br> &nbsp; &nbsp;5.<br> &nbsp; &nbsp;6. class AnswerProtocol(LineReceiver):<br> &nbsp; &nbsp;7.&nbsp; &nbsp;&nbsp;&nbsp;answers = {’How are you?’: ’Fine’, None : "I don’t know what you mean"}<br> &nbsp; &nbsp;8.&nbsp; &nbsp;&nbsp;&nbsp;<br> &nbsp; &nbsp;9.&nbsp; &nbsp;&nbsp;&nbsp;def lineReceived(self, line):<br> &nbsp;&nbsp;10.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;if self.answers.has_key(line): <br> &nbsp;&nbsp;11.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; self.sendLine(self.answers[line]) <br> &nbsp;&nbsp;12.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;else: <br> &nbsp;&nbsp;13.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; self.sendLine(self.answers[None])<br> <br> <br> 在我们启动这个机器人之前, 我们需要谈论一下状态机.<br> <br> 很多twisted协议处理中都需要状态机来记录当前的状态, 下面是一些建议:<br> <br> 1.不要编写过大, 过复杂的. 状态机应该一次只处理一个层次的抽象.<br> <br> 2. 使用python语言的动态性创建 open ended状态机, 比如SMTP客户端.<br> <br> 3. 不要把协议处理代码和应用相关代码混合.<br> <br> <br> <br> <br> 完整的代码:<br> <br> <br> &nbsp; &nbsp;1. # -*- coding: utf-8 -*-<br> &nbsp; &nbsp;2.<br> &nbsp; &nbsp;3. from twisted.protocols.basic import LineReceiver<br> &nbsp; &nbsp;4. from twisted.internet.protocol import Protocol, Factory<br> &nbsp; &nbsp;5. from twisted.internet import reactor<br> &nbsp; &nbsp;6.<br> &nbsp; &nbsp;7.<br> &nbsp; &nbsp;8. class AnswerProtocol(LineReceiver):<br> &nbsp; &nbsp;9.&nbsp; &nbsp;&nbsp;&nbsp;answers = {"How are you?": "Fine", None : "I don’t know what you mean"}<br> &nbsp;&nbsp;10.&nbsp; &nbsp;&nbsp;&nbsp;<br> &nbsp;&nbsp;11.&nbsp; &nbsp;&nbsp;&nbsp;def lineReceived(self, line):<br> &nbsp;&nbsp;12.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;if self.answers.has_key(line): <br> &nbsp;&nbsp;13.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; self.sendLine(self.answers[line]) <br> &nbsp;&nbsp;14.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;else: <br> &nbsp;&nbsp;15.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; self.sendLine(self.answers[None])<br> &nbsp;&nbsp;16.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; <br> &nbsp;&nbsp;17.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; <br> &nbsp;&nbsp;18.&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; <br> &nbsp;&nbsp;19. class AnswerFactory(Factory):<br> &nbsp;&nbsp;20.&nbsp; &nbsp;&nbsp;&nbsp;protocol = AnswerProtocol<br> &nbsp;&nbsp;21.&nbsp; &nbsp;&nbsp;&nbsp;<br> <br> <br> <br> <br> #开始启动服务<br> <br> factory = AnswerFactory()<br> <br> <br> reactor.listenTCP(8007, factory) <br> <br> reactor.run()<br> <br> <br> <br> <br> 客户端连接:<br> <br> <br> FunCat:~ Daniel$ telnet 127.0.0.1 8007<br> <br> Trying 127.0.0.1...<br> <br> Connected to localhost.<br> <br> Escape character is '^]'.<br> <br> How are you?<br> <br> Fine<br> <br> What's your name?<br> <br> I don’t know what you mean<br> <br> Connection closed by foreign host.</td> 
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