text: import re
  
  from .common import InfoExtractor
  from ..compat import compat_urlparse
  from ..utils import (
      int_or_none,
      js_to_json,
      parse_filesize,
      str_to_int,
  )
  
  
  class PornComIE(InfoExtractor):
      _VALID_URL = r'https?://(?:[a-zA-Z]+\.)?porn\.com/videos/(?:(?P<display_id>[^/]+)-)?(?P<id>\d+)'
      _TESTS = [{
          'url': 'http://www.porn.com/videos/teen-grabs-a-dildo-and-fucks-her-pussy-live-on-1hottie-i-rec-2603339',
          'md5': '3f30ce76267533cd12ba999263156de7',
          'info_dict': {
              'id': '2603339',
              'display_id': 'teen-grabs-a-dildo-and-fucks-her-pussy-live-on-1hottie-i-rec',
              'ext': 'mp4',
              'title': 'Teen grabs a dildo and fucks her pussy live on 1hottie, I rec',
              'thumbnail': r're:^https?://.*\.jpg$',
              'duration': 551,
              'view_count': int,
              'age_limit': 18,
              'categories': list,
              'tags': list,
          },
      }, {
          'url': 'http://se.porn.com/videos/marsha-may-rides-seth-on-top-of-his-thick-cock-2658067',
          'only_matching': True,
      }]
  
      def _real_extract(self, url):
          mobj = self._match_valid_url(url)
          video_id = mobj.group('id')
          display_id = mobj.group('display_id') or video_id
  
          webpage = self._download_webpage(url, display_id)
  
          config = self._parse_json(
              self._search_regex(
                  (r'=\s*({.+?})\s*;\s*v1ar\b',
                   r'=\s*({.+?})\s*,\s*[\da-zA-Z_]+\s*='),
                  webpage, 'config', default='{}'),
              display_id, transform_source=js_to_json, fatal=False)
  
          if config:
              title = config['title']
              formats = [{
                  'url': stream['url'],
                  'format_id': stream.get('id'),
                  'height': int_or_none(self._search_regex(
                      r'^(\d+)[pP]', stream.get('id') or '', 'height', default=None))
              } for stream in config['streams'] if stream.get('url')]
              thumbnail = (compat_urlparse.urljoin(
                  config['thumbCDN'], config['poster'])
                  if config.get('thumbCDN') and config.get('poster') else None)
              duration = int_or_none(config.get('length'))
          else:
              title = self._search_regex(
                  (r'<title>([^<]+)</title>', r'<h1[^>]*>([^<]+)</h1>'),
                  webpage, 'title')
              formats = [{
                  'url': compat_urlparse.urljoin(url, format_url),
                  'format_id': '%sp' % height,
                  'height': int(height),
                  'filesize_approx': parse_filesize(filesize),
              } for format_url, height, filesize in re.findall(
                  r'<a[^>]+href="(/download/[^"]+)">[^<]*?(\d+)p<span[^>]*>(\d+\s*[a-zA-Z]+)<',
                  webpage)]
              thumbnail = None
              duration = None
  
          self._sort_formats(formats)
  
          view_count = str_to_int(self._search_regex(
              (r'Views:\s*</span>\s*<span>\s*([\d,.]+)',
               r'class=["\']views["\'][^>]*><p>([\d,.]+)'), webpage,
              'view count', fatal=False))
  
          def extract_list(kind):
              s = self._search_regex(
                  (r'(?s)%s:\s*</span>\s*<span>(.+?)</span>' % kind.capitalize(),
                   r'(?s)<p[^>]*>%s:(.+?)</p>' % kind.capitalize()),
                  webpage, kind, fatal=False)
              return re.findall(r'<a[^>]+>([^<]+)</a>', s or '')
  
          return {
              'id': video_id,
              'display_id': display_id,
              'title': title,
              'thumbnail': thumbnail,
              'duration': duration,
              'view_count': view_count,
              'formats': formats,
              'age_limit': 18,
              'categories': extract_list('categories'),
              'tags': extract_list('tags'),
          }
  