[ninegag] fix _VALID_URL regex and handle the use of other external providers

youtube_dl/extractor/ninegag.py

@@ -9,17 +9,12 @@ from ..utils import str_to_int
 
 class NineGagIE(InfoExtractor):
     IE_NAME = '9gag'
-    _VALID_URL = r'''(?x)^https?://(?:www\.)?9gag\.tv/
-        (?:
-            v/(?P<numid>[0-9]+)|
-            p/(?P<id>[a-zA-Z0-9]+)/(?P<display_id>[^?#/]+)
-        )
-    '''
+    _VALID_URL = r'https?://(?:www\.)?9gag\.com/tv/p/(?P<id>[a-zA-Z0-9]+)/(?P<display_id>[^?#/]+)'
 
     _TESTS = [{
-        "url": "http://9gag.tv/v/1912",
+        "url": "http://9gag.com/tv/p/Kk2X5/people-are-awesome-2013-is-absolutely-awesome",
         "info_dict": {
-            "id": "1912",
+            "id": "Kk2X5",
             "ext": "mp4",
             "description": "This 3-minute video will make you smile and then make you feel untalented and insignificant. Anyway, you should share this awesomeness. (Thanks, Dino!)",
             "title": "\"People Are Awesome 2013\" Is Absolutely Awesome",
@@ -31,7 +26,7 @@ class NineGagIE(InfoExtractor):
         },
         'add_ie': ['Youtube']
     }, {
-        'url': 'http://9gag.tv/p/KklwM/alternate-banned-opening-scene-of-gravity?ref=fsidebar',
+        'url': 'http://9gag.com/tv/p/KklwM/alternate-banned-opening-scene-of-gravity?ref=fsidebar',
         'info_dict': {
             'id': 'KklwM',
             'ext': 'mp4',
@@ -42,19 +37,39 @@ class NineGagIE(InfoExtractor):
             'upload_date': '20140401',
             'uploader_id': 'krishnashenoi93',
         },
+        'add_ie': ['Youtube']
     }]
+    _EXTERNAL_VIDEO_PROVIDER = {
+        '1': {
+            'url': '%s',
+            'ie_key': 'Youtube',
+        },
+        '2': {
+            'url': 'http://player.vimeo.com/video/%s',
+            'ie_key': 'Vimeo',
+        },
+        '3': {
+            'url': 'http://instagram.com/p/%s',
+            'ie_key': 'Instagram',
+        },
+        '4': {
+            'url': 'http://vine.co/v/%s',
+            'ie_key': 'Vine',
+        },
+    }
 
     def _real_extract(self, url):
         mobj = re.match(self._VALID_URL, url)
-        video_id = mobj.group('numid') or mobj.group('id')
-        display_id = mobj.group('display_id') or video_id
+        video_id = mobj.group('id')
+        display_id = mobj.group('display_id')
 
         webpage = self._download_webpage(url, display_id)
 
         post_view = json.loads(self._html_search_regex(
             r'var postView = new app\.PostView\({\s*post:\s*({.+?}),\s*posts:\s*prefetchedCurrentPost', webpage, 'post view'))
 
-        youtube_id = post_view['videoExternalId']
+        external_video_id = post_view['videoExternalId']
+        external_video_provider = post_view['videoExternalProvider']
         title = post_view['title']
         description = post_view['description']
         view_count = str_to_int(post_view['externalView'])
@@ -62,8 +77,8 @@ class NineGagIE(InfoExtractor):
 
         return {
             '_type': 'url_transparent',
-            'url': youtube_id,
-            'ie_key': 'Youtube',
+            'url': self._EXTERNAL_VIDEO_PROVIDER[external_video_provider]['url'] % external_video_id,
+            'ie_key': self._EXTERNAL_VIDEO_PROVIDER[external_video_provider]['ie_key'],
             'id': video_id,
             'display_id': display_id,
             'title': title,