modules/urls.py

   1 # Erebus IRC bot - Author: Conny Sjoblom
   2 # vim: fileencoding=utf-8
   3 # URL Checker
   4 # This file is released into the public domain; see http://unlicense.org/
   5
   6 # module info
   7 modinfo = {
   8         'author': 'Erebus Team',
   9         'license': 'public domain',
  10         'compatible': [0],
  11         'depends': [],
  12         'softdeps': [],
  13 }
  14
  15 # http://embed.ly/tools/generator
  16
  17 # preamble
  18 import modlib
  19 lib = modlib.modlib(__name__)
  20 modstart = lib.modstart
  21 modstop = lib.modstop
  22
  23 # module code
  24 import sys
  25 if sys.version_info.major < 3:
  26         stringbase = basestring
  27         import urllib2
  28         import urlparse
  29         import HTMLParser
  30         html = HTMLParser.HTMLParser()
  31         from BeautifulSoup import BeautifulSoup
  32 else:
  33         stringbase = str
  34         import urllib.request as urllib2
  35         import urllib.parse as urlparse
  36         import html
  37         from bs4 import BeautifulSoup
  38
  39 import re, json, datetime
  40
  41 try:
  42         import aia
  43         aia_session = aia.AIASession()
  44         # aia is broken on capath systems, needs cafile to work
  45         aia_session._context.load_verify_locations(cafile='/etc/ssl/certs/ca-certificates.crt')
  46         aia_session._trusted = {
  47                 aia.openssl_get_cert_info(ca_der)["subject"]: ca_der
  48                 for ca_der in aia_session._context.get_ca_certs(True)
  49         }
  50         print("aia loaded")
  51 except ImportError as e:
  52         print(repr(e))
  53         aia = None
  54
  55 hostmask_regex = re.compile(r'^(.*)!(.*)@(.*)$')
  56
  57 def parser_hostmask(hostmask):
  58         if isinstance(hostmask, dict):
  59                 return hostmask
  60
  61         nick = None
  62         user = None
  63         host = None
  64
  65         if hostmask is not None:
  66                 match = hostmask_regex.match(hostmask)
  67
  68                 if not match:
  69                         nick = hostmask
  70                 else:
  71                         nick = match.group(1)
  72                         user = match.group(2)
  73                         host = match.group(3)
  74
  75         return {
  76                 'nick': nick,
  77                 'user': user,
  78                 'host': host
  79         }
  80
  81 class SmartRedirectHandler(urllib2.HTTPRedirectHandler):
  82         def http_error_301(self, req, fp, code, msg, headers):
  83                 result = urllib2.HTTPRedirectHandler.http_error_301(
  84                                 self, req, fp, code, msg, headers)
  85                 result.status = code
  86                 return result
  87
  88         def http_error_302(self, req, fp, code, msg, headers):
  89                 result = urllib2.HTTPRedirectHandler.http_error_302(
  90                                 self, req, fp, code, msg, headers)
  91                 result.status = code
  92                 return result
  93
  94 def _get_blocked_chans():
  95         return lib.parent.cfg.get('urls', 'blocked', '').split(',')
  96
  97 def process_line(line):
  98         responses = []
  99         num_found = 0
 100         limit = lib.parent.cfg.getint('urls', 'limit', 2)
 101         for action, group in regexes:
 102                 for regex in group:
 103                         for match in regex.findall(line):
 104                                 if match:
 105                                         num_found += 1
 106                                         if num_found > limit:
 107                                                 return responses
 108                                         if isinstance(match, stringbase):
 109                                                 resp = action(match)
 110                                         else:
 111                                                 resp = action(*match)
 112                                         if resp is not None and resp != "":
 113                                                 responses.append(resp)
 114         return responses
 115
 116 @lib.hooknum("PRIVMSG")
 117 def privmsg_hook(bot, textline):
 118         user = parser_hostmask(textline[1:textline.find(' ')])
 119         chan = textline.split()[2]
 120
 121         if chan in _get_blocked_chans(): return
 122
 123         try:
 124                 line = textline.split(None, 3)[3][1:]
 125         except IndexError:
 126                 line = ''
 127
 128         responses = process_line(line)
 129         if len(responses) > 0:
 130                 if lib.parent.cfg.getboolean('urls', 'multiline'):
 131                         for r in responses:
 132                                 bot.msg(chan, r, True)
 133                 else:
 134                         bot.msg(chan, ' | '.join(responses), True)
 135
 136 def unescape(line):
 137         return re.sub('\s+', ' ', html.unescape(line))
 138
 139 def gotspotify(type, track):
 140         url = 'http://ws.spotify.com/lookup/1/?uri=spotify:%s:%s' % (type, track)
 141         xml = urllib2.urlopen(url).read()
 142         soup = BeautifulSoup(xml, convertEntities=BeautifulSoup.HTML_ENTITIES)
 143         lookup_type = soup.contents[2].name
 144
 145         if lookup_type == 'track':
 146                 name = soup.find('name').string
 147                 album_name = soup.find('album').find('name').string
 148                 artist_name = soup.find('artist').find('name').string
 149                 popularity = soup.find('popularity')
 150                 if popularity:
 151                         popularity = float(popularity.string)*100
 152                 length = float(soup.find('length').string)
 153                 minutes = int(length)/60
 154                 seconds = int(length)%60
 155
 156                 return unescape('Track: %s - %s / %s %s:%.2d %2d%%' % (artist_name, name, album_name, minutes, seconds, popularity))
 157
 158         elif lookup_type == 'album':
 159                 album_name = soup.find('album').find('name').string
 160                 artist_name = soup.find('artist').find('name').string
 161                 released = soup.find('released').string
 162                 return unescape('Album: %s - %s - %s' % (artist_name, album_name, released))
 163
 164         else:
 165                 return 'Unsupported type.'
 166
 167 def _yt_duration(s):
 168         mo = re.match(r'P(\d+D)?T(\d+H)?(\d+M)?(\d+S)?', s)
 169         pcs = [x for x in mo.groups() if x]
 170         return ''.join(pcs).lower()
 171 def _yt_date(s, f):
 172         mo = re.match(r'(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})\.(\d+)Z', s)
 173         return datetime.datetime(*(int(x) for x in mo.groups())).strftime(f)
 174 def _yt_round(n):
 175         n = float(n)
 176         if n >= 10**12:
 177                 return '%.1ft' % (n/10**12)
 178         elif n >= 10**9:
 179                 return '%.1fb' % (n/10**9)
 180         elif n >= 10**6:
 181                 return '%.1fm' % (n/10**6)
 182         elif n >= 10**3:
 183                 return '%.1fk' % (n/10**3)
 184         else:
 185                 return int(n)
 186
 187 def gotyoutube(url):
 188         url_data = urlparse.urlparse(url)
 189         query = urlparse.parse_qs(url_data.query)
 190         video = query["v"][0]
 191         api_url = 'https://www.googleapis.com/youtube/v3/videos?part=snippet,contentDetails,statistics&id=%s&key=%s' % (video, lib.parent.cfg.get('urls', 'api_key'))
 192         try:
 193                 respdata = urllib2.urlopen(api_url).read()
 194                 v = json.loads(respdata)
 195                 v = v['items'][0]
 196
 197                 return unescape(lib.parent.cfg.get('urls', 'yt_format', "\002%(author)s\002: \037%(title)s\037 [%(duration)s, uploaded %(uploaded)s, %(views)s v/%(likes)s l/%(dislikes)s d]") % {
 198                         'title': v['snippet']['title'],
 199                         'author': v['snippet']['channelTitle'],
 200                         'duration': _yt_duration(v['contentDetails']['duration']),
 201                         'uploaded': _yt_date(v['snippet']['publishedAt'], lib.parent.cfg.get('urls', 'yt_date_format', '%b %d %Y')),
 202                         'views': _yt_round(v['statistics']['viewCount']),
 203                         'likes': _yt_round(v['statistics']['likeCount']),
 204                         'dislikes': _yt_round(v['statistics']['dislikeCount']),
 205                 })
 206         except urllib2.HTTPError as e:
 207                 if e.getcode() == 403:
 208                         return 'API limit exceeded'
 209                 else:
 210                         return str(e)
 211         except IndexError:
 212                 return 'no results'
 213         except Exception as e:
 214                 return str(e)
 215
 216 def gottwitch(uri):
 217         url = 'https://api.twitch.tv/helix/streams?user_login=%s' % uri.split('/')[0]
 218         opener = urllib2.build_opener()
 219         opener.addheaders = [('Client-ID', lib.parent.cfg.get('urls', 'twitch_api_key'))]
 220         respdata = opener.open(url).read()
 221         twitch = json.loads(respdata)['data']
 222         try:
 223                 # TODO: add current game.
 224                 return unescape('\037%s\037 is %s (%s)' % (twitch[0]['user_name'], twitch[0]['type'], twitch[0]['title']))
 225         except:
 226                 return 'Channel offline.'
 227
 228 def _humanize_bytes(b):
 229         b = int(b)
 230         i = 0
 231         table = " kMGTPEZYRQ"
 232         while b > 1024:
 233                 i += 1
 234                 b /= 1024.0
 235         if i == 0:
 236                 return "%dB" % (b)
 237         else:
 238                 return "%.2f%siB" % (b, table[i])
 239
 240 def _do_request(url, try_aia=False):
 241         """Returns the HTTPResponse object, or a string on error"""
 242         request = urllib2.Request(url, headers={'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36', 'Sec-Ch-Ua': '"Chromium";v="116", "Not)A;Brand";v="24", "Google Chrome";v="116"', 'Sec-Ch-Ua-Mobile': '?0', 'Sec-Ch-Ua-Platform': '"Linux"', 'Sec-Fetch-Dest': 'document', 'Sec-Fetch-Mode': 'navigate', 'Sec-Fetch-Site': 'same-origin', 'Sec-Fetch-User': '?1', 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7', 'Accept-Language': 'en-US,en;q=0.9', 'Cache-Control': 'no-cache', 'Pragma': 'no-cache', 'Upgrade-Insecure-Requests': '1'})
 243         if try_aia:
 244                 opener = urllib2.build_opener(urllib2.HTTPSHandler(context=aia_session.ssl_context_from_url(url)), SmartRedirectHandler())
 245         else:
 246                 opener = urllib2.build_opener(SmartRedirectHandler())
 247
 248         # Send request and handle errors
 249         try:
 250                 response = opener.open(request, timeout=2)
 251         except urllib2.HTTPError as e:
 252                 return 'Request error: %s %s' % (e.code, e.reason)
 253         except urllib2.URLError as e:
 254                 if "certificate verify failed: unable to get local issuer certificate" in str(e.reason):
 255                         if aia: # Retry with AIA enabled
 256                                 return _do_request(url, True)
 257                         else:
 258                                 lib.parent.log('urls', '?', 'If the site is not serving the certificate chain, installing the aia library might make this request work: pip install aia')
 259                                 return 'Request error: site may have broken TLS configuration (%s)' % (e.reason)
 260                 else:
 261                         return 'Request error: %s' % (e.reason)
 262         except TimeoutError as e:
 263                 return 'Request error: request timed out'
 264         except Exception as e:
 265                 return 'Unknown error: %s %r' % (type(e).__name__, e.args)
 266
 267         return response
 268
 269
 270 def goturl(url):
 271         output = []
 272         for _, group in other_regexes:
 273                 for regex in group:
 274                         if regex.match(url):
 275                                 return None
 276
 277         response = _do_request(url)
 278         if isinstance(response, stringbase):
 279                 return response
 280
 281         # Try to add type and length headers to reply
 282         c_type = response.getheader('Content-Type', '').split(';', 1)[0]
 283         c_len = response.getheader('Content-Length')
 284         if c_type != '':
 285                 output.append("[%s] " % (c_type))
 286         else:
 287                 output.append("[no type] ")
 288         if c_type != "text/html": # else length will be provided by HTML code below
 289                 if c_len is not None:
 290                         output.append("[%s] " % (_humanize_bytes(c_len)))
 291                 else:
 292                         output.append("[no length] ")
 293
 294         # Try to add title if HTML
 295         if c_type == 'text/html':
 296                 try:
 297                         responsebody = response.read(1024*1024)
 298                 except Exception as e:
 299                         output.append('Error reading response body: %s %r' % (type(e).__name__, e.args))
 300                 else:
 301                         if c_len is not None and len(responsebody) != int(c_len):
 302                                 output.append("[actual %s; Content-Length %s] " % (_humanize_bytes(len(responsebody)), _humanize_bytes(c_len)))
 303                         else:
 304                                 output.append("[%s] " % (_humanize_bytes(len(responsebody))))
 305                         try:
 306                                 soup = BeautifulSoup(responsebody)
 307                                 if soup.title:
 308                                         output.append('Title: ' + unescape('%s' % (soup.find('title').string.strip())))
 309                                 else:
 310                                         output.append('No title')
 311                         except Exception as e:
 312                                 output.append('Title error: %s %r ' % (type(e).__name__, e.args))
 313
 314         return ''.join(output)
 315
 316 url_regex = (
 317         re.compile(r'https?://(?:[^/\s.]+\.)+[^/\s.]+(?:/\S+)?'),
 318 )
 319 other_regexes = (
 320         (lambda x: '', (re.compile(r"""https?://(?:www\.)?(?:twitter|x)\.com/""", re.I),)), # skip twitter
 321         (lambda x: '', (re.compile(r"""https?://(?:www\.)?reddit\.com/""", re.I),)), # skip new-reddit
 322 )
 323 regexes = other_regexes + (
 324         (goturl, url_regex),
 325 )