300 lines
8.0 KiB
Python
Executable File
300 lines
8.0 KiB
Python
Executable File
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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import sys, os, re, time, urllib, pickle, random, HTMLParser
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BUFSIZ = 8192
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delay = 0.100 # seconds
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bot_user = 'urlbot'
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basedir = '.'
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if 2 == len(sys.argv): basedir = sys.argv[1]
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event_files_dir = os.path.join(basedir, 'event_files')
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fifo_path = os.path.join(basedir, 'cmdfifo')
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# rate limiting to 5 messages per 10 minutes
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hist_max_count = 5
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hist_max_time = 10 * 60
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hist_ts = []
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hist_flag = True
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uptime = -time.time()
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request_counter = 0
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def debug_enabled():
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# return True
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return False
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def e(data):
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if data:
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if unicode == type(data):
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return data.encode('utf8')
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elif str == type(data):
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return data.encode('string-escape')
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else:
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return data
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else:
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return "''"
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def logger(severity, message):
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# sev = ( 'err', 'warn', 'info' )
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# if severity in sev:
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args = (sys.argv[0], time.strftime('%Y-%m-%d.%H:%M:%S'), severity, message)
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sys.stderr.write(e('%s %s %s: %s' % args) + '\n')
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class urllib_user_agent_wrapper(urllib.FancyURLopener):
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version = '''Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 Iceweasel/31.0'''
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def fetch_page(url):
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logger('info', 'fetching page ' + url)
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try:
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urllib._urlopener = urllib_user_agent_wrapper()
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response = urllib.urlopen(url)
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html = response.read(BUFSIZ) # ignore more than BUFSIZ
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response.close()
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return (html, response.headers)
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except IOError as e:
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logger('warn', 'failed: ' + e.errno)
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return (None, None)
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def extract_title(url):
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if 'repo/urlbot.git' in url:
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logger('info', 'repo URL found: ' + url)
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return (3, 'wee, that looks like my home repo!')
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logger('info', 'extracting title from ' + url)
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(html, headers) = fetch_page(url)
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if html:
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if 'content-type' in headers:
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if 'text/' != headers['content-type'][:len('text/')]:
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return (1, headers['content-type'])
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result = re.match(r'.*?<title.*?>(.*?)</title>.*?', html, re.S | re.M | re.IGNORECASE)
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if result:
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match = result.groups()[0]
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# if 'charset=UTF-8' in headers['content-type']:
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# match = unicode(match)
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try:
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expanded_html = parser.unescape(match)
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except UnicodeDecodeError as e: # idk why this can happen, but it does
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logger('warn', 'parser.unescape() expoded here: ' + str(e))
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expanded_html = match
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return (0, expanded_html)
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else:
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return (2, 'no title')
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return (-1, 'error')
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def chat_write(message, prefix='/say '):
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global request_counter
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request_counter += 1
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if debug_enabled():
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print message
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else:
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try:
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fd = open(fifo_path, 'wb')
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# FIXME: somehow, unicode chars can end up inside a <str> message,
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# which seems to make both unicode() and ''.encode('utf8') fail.
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try:
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msg = unicode(prefix) + unicode(message) + '\n'
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msg = msg.encode('utf8')
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except UnicodeDecodeError:
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msg = prefix + message + '\n'
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fd.write(msg)
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fd.close()
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except IOError:
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logger('err', "couldn't print to fifo " + fifo_path)
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def ratelimit_exceeded():
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global hist_flag
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now = time.time()
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hist_ts.append(now)
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if hist_max_count < len(hist_ts):
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first = hist_ts.pop(0)
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if (now - first) < hist_max_time:
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if hist_flag:
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hist_flag = False
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chat_write('(rate limited to %d messages in %d seconds, try again at %s)' %(hist_max_count, hist_max_time, time.strftime('%T %Z', time.localtime(hist_ts[0] + hist_max_time))))
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logger('warn', 'rate limiting exceeded: ' + pickle.dumps(hist_ts))
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return True
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hist_flag = True
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return False
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def extract_url(data):
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ret = None
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result = re.findall("(https?://[^\s>]+)", data)
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if result:
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for r in result:
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if ratelimit_exceeded():
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return False
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(status, title) = extract_title(r)
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if 0 == status:
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message = 'Title: %s: %s' % (title.strip(), e(r))
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elif 1 == status:
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logger('info', 'no message sent for non-text %s (%s)' %(r, title))
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continue
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elif 2 == status:
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message = 'No title: %s' % (e(r))
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elif 3 == status:
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message = title
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else:
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message = 'some error occurred when fetching %s' % e(r)
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message = message.replace('\n', '\\n')
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logger('info', 'printing ' + message)
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chat_write(message)
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ret = True
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return ret
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def mental_ill(data):
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min_ill = 3
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c = 0
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# return True for min_ill '!' in a row
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for d in data:
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if '!' == d or '?' == d:
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c += 1
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else:
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c = 0
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if (min_ill <= c):
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return True
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return False
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def parse_other(data):
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reply_user = data.split(' ')[0].strip('<>')
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if True == mental_ill(data):
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if ratelimit_exceeded():
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return False
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chat_write('''Multiple exclamation/question marks are a sure sign of mental disease, with %s as a living example.''' % reply_user)
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return True
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def parse_pn(data):
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## reply_user = data.split(' ')[0].strip('<>')
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# since we can't determine if a user named 'foo> ' just wrote ' > bar'
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# or a user 'foo' just wrote '> > bar', we can't safely answer here
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logger('warn', 'received PN: ' + data)
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return False
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def parse_commands(data):
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words = data.split(' ')
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if 2 > len(words): # need at least two words
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return None
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# reply if beginning of the text matches bot_user
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if words[1][0:len(bot_user)] == bot_user:
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reply_user = words[0].strip('<>')
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if 'hangup' in data:
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chat_write('', prefix='/quit')
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logger('warn', 'received hangup: ' + data)
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return None
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if ratelimit_exceeded():
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return False
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if 'command' in data:
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chat_write(reply_user + (""": known commands: 'command', 'info', 'hangup', 'ping', 'uptime', 'version'"""))
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elif 'version' in data:
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chat_write(reply_user + (''': I'm running ''' + VERSION))
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elif 'unikot' in data:
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chat_write(reply_user + (u''': ┌────────┐'''))
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chat_write(reply_user + (u''': │Unicode!│'''))
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chat_write(reply_user + (u''': └────────┘'''))
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elif 'uptime' in data:
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u = int(uptime + time.time())
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plural_uptime = 's'
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plural_request = 's'
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if 1 == u: plural_uptime = ''
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if 1 == request_counter: plural_request = ''
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chat_write(reply_user + (''': happily serving for %d second%s, %d request%s so far.''' %(u, plural_uptime, request_counter, plural_request)))
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logger('info', 'sent statistics')
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elif 'ping' in data:
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if (0 == random.randint(0, 3)): # 1:4
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chat_write(reply_user + ''': peng (You're dead now.)''')
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logger('info', 'sent pong (variant)')
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else:
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chat_write(reply_user + ''': pong''')
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logger('info', 'sent pong')
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elif 'info' in data:
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chat_write(reply_user + (''': I'm a bot, my job is to extract <title> tags from posted URLs. In case I'm annoying or for further questions, please talk to my master Cae. I'm rate limited and shouldn't post more than %d messages per %d seconds. To make me exit immediately, highlight me with 'hangup' in the message (emergency only, please). For other commands, highlight me with 'command'.''' %(hist_max_count, hist_max_time)))
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logger('info', 'sent long info')
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else:
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chat_write(reply_user + (''': I'm a bot (highlight me with 'info' for more information).'''))
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logger('info', 'sent short info')
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def parse_delete(filepath):
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try:
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fd = open(filepath, 'rb')
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except IOError:
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logger('err', 'file has vanished: ' + filepath)
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return False
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content = fd.read(BUFSIZ) # ignore more than BUFSIZ
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fd.close()
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os.remove(filepath) # probably better crash here
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if content[1:1+len(bot_user)] == bot_user:
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return
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if 'has set the subject to:' in content:
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return
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if content.startswith('PRIV#'):
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parse_pn(content)
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return
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if True != extract_url(content):
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parse_commands(content)
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parse_other(content)
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return
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def get_version_git():
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import subprocess
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cmd = ['git', 'log', '-n', '1', '--oneline', '--abbrev-commit']
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p = subprocess.Popen(cmd, bufsize=1, stdout=subprocess.PIPE)
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first_line = p.stdout.readline()
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if 0 == p.wait():
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return "version (Git) '%s'" % e(first_line.strip())
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else:
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return "(unknown version)"
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if '__main__' == __name__:
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VERSION = get_version_git()
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print sys.argv[0] + ' ' + VERSION
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parser = HTMLParser.HTMLParser()
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while 1:
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try:
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for f in os.listdir(event_files_dir):
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if 'mcabber-' == f[:8]:
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parse_delete(os.path.join(event_files_dir, f))
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time.sleep(delay)
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except KeyboardInterrupt:
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print ""
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exit(130)
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