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 servername = ""
  12 timeout = 240
  13 username = "plomlombot"
  14 nickname = username
  15 channel = "#zrolaps-test"
  16
  17 class IO:
  18
  19     def __init__(self, server, port):
  20         self.socket = socket.socket()
  21         self.socket.connect((server, port))
  22         self.socket.setblocking(0)
  23         self.line_buffer = []
  24         self.rune_buffer = ""
  25         self.last_pong = time.time()
  26
  27     def _pingtest(self):
  28         if self.last_pong + timeout < time.time():
  29             raise RuntimeError("server not answering")
  30         self.send_line("PING " + nickname + " " + servername)
  31
  32     def send_line(self, msg):
  33         msg = msg.replace("\r", " ")
  34         msg = msg.replace("\n", " ")
  35         if len(msg.encode("utf-8")) > 510:
  36             print("NOT SENT LINE TO SERVER (too long): " + msg)
  37         print("LINE TO SERVER: "
  38             + str(datetime.datetime.now()) + ": " + msg)
  39         msg = msg + "\r\n"
  40         msg_len = len(msg)
  41         total_sent_len = 0
  42         while total_sent_len < msg_len:
  43             sent_len = self.socket.send(bytes(msg[total_sent_len:], "UTF-8"))
  44             if sent_len == 0:
  45                 raise RuntimeError("socket connection broken")
  46             total_sent_len += sent_len
  47
  48     def recv_line_wrapped(self):
  49         if len(self.line_buffer) > 0:
  50             return self.line_buffer.pop(0)
  51         while True:
  52             ready = select.select([self.socket], [], [], int(timeout / 2))
  53             if not ready[0]:
  54                 self._pingtest()
  55                 return None
  56             self.last_pong = time.time()
  57             received_runes = self.socket.recv(1024).decode("UTF-8")
  58             if len(received_runes) == 0:
  59                 raise RuntimeError("socket connection broken")
  60             self.rune_buffer += received_runes
  61             lines_split = str.split(self.rune_buffer, "\r\n")
  62             self.line_buffer += lines_split[:-1]
  63             self.rune_buffer = lines_split[-1]
  64             if len(self.line_buffer) > 0:
  65                 return self.line_buffer.pop(0)
  66
  67     def recv_line(self):
  68         line = self.recv_line_wrapped()
  69         if line:
  70             print("LINE FROM SERVER " + str(datetime.datetime.now()) + ": " +
  71             line)
  72         return line
  73
  74 def url_check(msg):
  75     matches = re.findall("(https?://[^\s]+)", msg)
  76     for i in range(len(matches)):
  77         url = matches[i]
  78         try:
  79             webpage = urllib.request.urlopen(url, timeout=15)
  80         except urllib.error.HTTPError as error:
  81             print("TROUBLE FOLLOWING URL: " + str(error))
  82             continue
  83         charset = webpage.info().get_content_charset()
  84         if not charset:
  85             charset="utf-8"
  86         content_type = webpage.info().get_content_type()
  87         if not content_type in ('text/html', 'text/xml',
  88                 'application/xhtml+xml'):
  89             print("TROUBLE INTERPRETING URL: bad content_type " + content_type)
  90             continue
  91         content = webpage.read().decode(charset)
  92         title = str(content).split('<title>')[1].split('</title>')[0]
  93         title = html.unescape(title)
  94         io.send_line("PRIVMSG " + target + " :page title for url: " + title)
  95
  96 io = IO(servernet, port)
  97 io.send_line("NICK " + nickname)
  98 io.send_line("USER " + username + " 0 * : ")
  99 io.send_line("JOIN " + channel)
 100 servername = io.recv_line().split(" ")[0][1:]
 101 while 1:
 102     line = io.recv_line()
 103     if not line:
 104         continue
 105     tokens = line.split(" ")
 106     if len(tokens) > 1:
 107         if tokens[1] == "PRIVMSG":
 108             sender = ""
 109             for rune in tokens[0]:
 110                 if rune == "!":
 111                     break
 112                 if rune != ":":
 113                     sender += rune
 114             receiver = ""
 115             for rune in tokens[2]:
 116                 if rune == "!":
 117                     break
 118                 if rune != ":":
 119                     receiver += rune
 120             target = sender
 121             if receiver != nickname:
 122                 target = receiver
 123             msg = str.join(" ", tokens[3:])[1:]
 124             url_check(msg)
 125         if tokens[0] == "PING":
 126             io.send_line("PONG " + tokens[1])