| If we abstract network commands, all network services are basically the same, except the service ports. The linereceiver class helps encapsulate these commands. Consider using linereceiver to implement a robot. 1.
2. #-*-coding: UTF-8 -*-
3.
4. From twisted. Protocols. Basic import linereceiver
5.
6. Class answerprotocol (linereceiver ):
7. Answers = {'How are you? ': 'Fine', none: "I don't know what you mean "}
8.
9. Def linereceived (self, line ):
10. If self. Answers. has_key (line ):
11. Self. sendline (self. Answers [Line])
12. Else:
13. Self. sendline (self. Answers [none]) Before starting this robot, we need to talk about the state machine. Many twisted protocols require a state machine to record the current state. The following are some suggestions: 1. Do not write too large, too complicated. The state machine should process only one level of abstraction at a time. 2. Create an open ended state machine, such as an SMTP client, dynamically using the Python language. 3. Do not mix protocol processing code with application-related code. Complete code: 1. #-*-coding: UTF-8 -*-
2.
3. From twisted. Protocols. Basic import linereceiver
4. From twisted. Internet. Protocol import protocol, factory
5. From twisted. Internet import Reactor
6.
7.
8. Class answerprotocol (linereceiver ):
9. Answers = {"how are you? ":" Fine ", none:" I don't know what you mean "}
10.
11. Def linereceived (self, line ):
12. If self. Answers. has_key (line ):
13. Self. sendline (self. Answers [Line])
14. Else:
15. Self. sendline (self. Answers [none])
16.
17.
18.
19. Class answerfactory (factory ):
20. Protocol = answerprotocol
21. # Start the service Factory = answerfactory () Reactor. listentcp (8007, factory) Reactor. Run () Client connection: Funcat :~ Daniel $ Telnet 127.0.0.1 8007 Trying 127.0.0.1... Connected to localhost. Escape Character is '^]'. How are you? Fine What's your name? I don't know what you mean Connection closed by foreign host. |
