plomlombot.py

   1 import socket
   2 import datetime
   3 import select
   4 import time
   5 import re
   6 import urllib.request
   7 import html
   8
   9 SERVERNET = "irc.freenode.net"
  10 PORT = 6667
  11 TIMEOUT = 240
  12 USERNAME = "plomlombot"
  13 NICKNAME = USERNAME
  14 CHANNEL = "#zrolaps-test"
  15
  16 class ExceptionForRestart(Exception):
  17     pass
  18
  19 class IO:
  20
  21     def __init__(self, servernet, port, timeout):
  22         self.timeout = timeout
  23         self.socket = socket.socket()
  24         self.socket.connect((servernet, port))
  25         self.socket.setblocking(0)
  26         self.line_buffer = []
  27         self.rune_buffer = ""
  28         self.last_pong = time.time()
  29         self.servername = self.recv_line(send_ping=False).split(" ")[0][1:]
  30
  31     def _pingtest(self, send_ping=True):
  32         if self.last_pong + self.timeout < time.time():
  33             print("SERVER NOT ANSWERING")
  34             raise ExceptionForRestart
  35         if send_ping:
  36             self.send_line("PING " + self.servername)
  37
  38     def send_line(self, msg):
  39         msg = msg.replace("\r", " ")
  40         msg = msg.replace("\n", " ")
  41         if len(msg.encode("utf-8")) > 510:
  42             print("NOT SENT LINE TO SERVER (too long): " + msg)
  43         print("LINE TO SERVER: "
  44             + str(datetime.datetime.now()) + ": " + msg)
  45         msg = msg + "\r\n"
  46         msg_len = len(msg)
  47         total_sent_len = 0
  48         while total_sent_len < msg_len:
  49             sent_len = self.socket.send(bytes(msg[total_sent_len:], "UTF-8"))
  50             if sent_len == 0:
  51                 print("SOCKET CONNECTION BROKEN")
  52                 raise ExceptionForRestart
  53             total_sent_len += sent_len
  54
  55     def _recv_line_wrapped(self, send_ping=True):
  56         if len(self.line_buffer) > 0:
  57             return self.line_buffer.pop(0)
  58         while True:
  59             ready = select.select([self.socket], [], [], int(self.timeout / 2))
  60             if not ready[0]:
  61                 self._pingtest(send_ping)
  62                 return None
  63             self.last_pong = time.time()
  64             received_runes = self.socket.recv(1024).decode("UTF-8")
  65             if len(received_runes) == 0:
  66                 print("SOCKET CONNECTION BROKEN")
  67                 raise ExceptionForRestart
  68             self.rune_buffer += received_runes
  69             lines_split = str.split(self.rune_buffer, "\r\n")
  70             self.line_buffer += lines_split[:-1]
  71             self.rune_buffer = lines_split[-1]
  72             if len(self.line_buffer) > 0:
  73                 return self.line_buffer.pop(0)
  74
  75     def recv_line(self, send_ping=True):
  76         line = self._recv_line_wrapped(send_ping)
  77         if line:
  78             print("LINE FROM SERVER " + str(datetime.datetime.now()) + ": " +
  79             line)
  80         return line
  81
  82 def init_session(servernet, port, timeout, nickname, username, channel):
  83     print("CONNECTING TO " + servernet)
  84     io = IO(servernet, port, timeout)
  85     io.send_line("NICK " + nickname)
  86     io.send_line("USER " + username + " 0 * : ")
  87     io.send_line("JOIN " + channel)
  88     return io
  89
  90 def lineparser_loop(io, nickname):
  91
  92     def act_on_privmsg(tokens):
  93
  94         def url_check(msg):
  95             matches = re.findall("(https?://[^\s]+)", msg)
  96             for i in range(len(matches)):
  97                 url = matches[i]
  98                 try:
  99                     webpage = urllib.request.urlopen(url, timeout=15)
 100                 except urllib.error.HTTPError as error:
 101                     print("TROUBLE FOLLOWING URL: " + str(error))
 102                     continue
 103                 charset = webpage.info().get_content_charset()
 104                 if not charset:
 105                     charset="utf-8"
 106                 content_type = webpage.info().get_content_type()
 107                 if not content_type in ('text/html', 'text/xml',
 108                         'application/xhtml+xml'):
 109                     print("TROUBLE INTERPRETING URL: bad content type "
 110                             + content_type)
 111                     continue
 112                 content = webpage.read().decode(charset)
 113                 title = str(content).split('<title>')[1].split('</title>')[0]
 114                 title = html.unescape(title)
 115                 io.send_line("PRIVMSG " + target + " :page title for url: "
 116                     + title)
 117
 118         sender = ""
 119         for rune in tokens[0]:
 120             if rune == "!":
 121                 break
 122             if rune != ":":
 123                 sender += rune
 124         receiver = ""
 125         for rune in tokens[2]:
 126             if rune == "!":
 127                 break
 128             if rune != ":":
 129                 receiver += rune
 130         target = sender
 131         if receiver != nickname:
 132             target = receiver
 133         msg = str.join(" ", tokens[3:])[1:]
 134         url_check(msg)
 135
 136     while 1:
 137         line = io.recv_line()
 138         if not line:
 139             continue
 140         tokens = line.split(" ")
 141         if len(tokens) > 1:
 142             if tokens[1] == "PRIVMSG":
 143                 act_on_privmsg(tokens)
 144             if tokens[0] == "PING":
 145                 io.send_line("PONG " + tokens[1])
 146 while 1:
 147     try:
 148         io = init_session(SERVERNET, PORT, TIMEOUT, NICKNAME, USERNAME,
 149                 CHANNEL)
 150         lineparser_loop(io, NICKNAME)
 151     except ExceptionForRestart:
 152         io.socket.close()
 153         continue