[imdb] Extractor for lists (#2033)

youtube_dl/extractor/imdb.py

@@ -55,3 +55,32 @@ class ImdbIE(InfoExtractor):
             'description': descr,
             'thumbnail': format_info['slate'],
         }
+
+class ImdbListIE(InfoExtractor):
+    IE_NAME = u'imdb:list'
+    IE_DESC = u'Internet Movie Database lists'
+    _VALID_URL = r'http://www\.imdb\.com/list/(?P<id>[\da-zA-Z_-]{11})'
+    
+    def _real_extract(self, url):
+        mobj = re.match(self._VALID_URL, url)
+        list_id = mobj.group('id')
+        
+        # RSS XML is sometimes malformed
+        rss = self._download_webpage('http://rss.imdb.com/list/%s' % list_id, list_id, u'Downloading list RSS')
+        list_title = self._html_search_regex(r'<title>(.*?)</title>', rss, u'list title')
+        
+        # Export is independent of actual author_id, but returns 404 if no author_id is provided.
+        # However, passing dummy author_id seems to be enough.
+        csv = self._download_webpage('http://www.imdb.com/list/export?list_id=%s&author_id=ur00000000' % list_id,
+                                     list_id, u'Downloading list CSV')
+        
+        entries = []
+        for item in csv.split('\n')[1:]:
+            cols = item.split(',')
+            if len(cols) < 2:
+                continue
+            item_id = cols[1][1:-1]
+            if item_id.startswith('vi'):
+                entries.append(self.url_result('http://www.imdb.com/video/imdb/%s' % item_id, 'Imdb'))
+        
+        return self.playlist_result(entries, list_id, list_title)