Python IRC Bot 不会在某些服务器上加入频道，我不知道如何让它响应用户输入

Question

我有一个python IRC机器人，我开始练习我的python。但是，对于某些服务器，它不会加入频道，尽管它已成功登录。我也希望它对像 ！test 这样的用户命令做出反应，但我不确定该怎么做。在它工作的服务器上，它会成功 ping 回来。

from socket import socket, AF_INET, SOCK_STREAM
network = raw_input("Server: ")
port = 6667
chan = raw_input("Channel: ")
nick = raw_input("Nick: ")
irc=socket(AF_INET,SOCK_STREAM)
irc.connect((network, port))
a=irc.recv (4096)
print a
irc.send('NICK ' + nick + 'rn')
irc.send('USER john_bot john_bot bla :john_botrn')
irc.send('JOIN :' + chan + 'rn')
irc.send('PRIVMSG ' + chan + ' :Hello.rn')
def ircSend(msg):
     print(msg)
     irc.send(msg)
while True:
    data = irc.recv(4096)
    print data
    if data.find('PING') != -1:
       ircSend('PONG ' + data.split()[1] + 'rn')

Answer 1

在某些服务器上，您必须使用PONG响应PING，然后才能实际执行任何操作。

ircSend('NICK ' + nick + 'rn')
ircSend('USER john_bot john_bot bla :john_botrn')
data = ircRecv() # explained later
if data.find('PING') != -1:
    ircSend('PONG ' + data.split()[1] + 'rn')
ircSend('JOIN :' + chan + 'rn')
ircSend('PRIVMSG ' + chan + ' :Hello.rn')

你真的不需要这个

a=irc.recv (4096)
print a

有时IRC服务器一次发送多行（例如MOTD或NAMES）。只要总字节数不超过 4096，这将很好地处理它（有些行会分成两行）

data = irc.recv(4096)
for line in data.split('rn'):
    # process the line

如果一行会切成两半（很少会，就像 PING 碰巧在那里一样），我们可以一次接收一行并将其余字符留给套接字的缓冲区。但是，这可能效率较低（我没有测试过它，所以也许这根本不重要）

def ircRecv():
    line = ''
    while 1: # same as while True:
        character = irc.recv(1)
        if character == 'n':
            break # exit the loop
        elif character != 'r':
            line += character
    print line
    return line

从 IRC RFC 的第 8 页：

<message>  ::= [':' <prefix> <SPACE> ] <command> <params> <crlf>
<prefix>   ::= <servername> | <nick> [ '!' <user> ] [ '@' <host> ]
<command>  ::= <letter> { <letter> } | <number> <number> <number>
<SPACE>    ::= ' ' { ' ' }
<params>   ::= <SPACE> [ ':' <trailing> | <middle> <params> ]
<middle>   ::= <Any *non-empty* sequence of octets not including SPACE
           or NUL or CR or LF, the first of which may not be ':'>
<trailing> ::= <Any, possibly *empty*, sequence of octets not including
             NUL or CR or LF>
<crlf>     ::= CR LF

这意味着您始终可以轻松且肯定地获得消息的发件人，如下所示：

# put this inside the main loop
# this will throw an IndexError when the connection is closed,
# an empty line does not contain any spaces
line = ircRecv()
if line.split()[0].find('!') != -1:
    # the first character must be a colon because <command> can't include
    # an exclamation mark
    someOneElsesNick = line[1:line.find('!')]
    command = line.split()[1]

有人打招呼时回答！

    if command == 'PRIVMSG':
        destination = line.split()[2] # channel or bot's nick
        # <trailing>, in this case, the message
        message = line[line[1:].find(':')+2 : ] # everything after the 2nd colon
        # we add one since we don't want include the <trailing> colon in
        # the message and an other one because line[1:].find() is one smaller 
        # number than line.find() would be
        # if we receive a private message, we have to respond to the sender,
        # not to ourself
        if destination == nick:
            destination = someOneElsesNick
        if message.startswith('hi!'):
            ircSend('PRIVMSG ' + destination + ' :Hi, '
            + someOneElsesNick + '!rn')

有关更多信息，请查看 IRC RFC： http://www.ietf.org/rfc/rfc1459.txt（尤其是第 2.3.1 和 4 节）。如果您不想处理 IRC 协议，请使用扭曲:)http://twistedmatrix.com/trac/