[rutube] Use _download_json

youtube_dl/extractor/rutube.py

@@ -2,7 +2,6 @@
 from __future__ import unicode_literals
 
 import re
-import json
 import itertools
 
 from .common import InfoExtractor
@@ -39,17 +38,15 @@ class RutubeIE(InfoExtractor):
     def _real_extract(self, url):
         mobj = re.match(self._VALID_URL, url)
         video_id = mobj.group('id')
-        
-        api_response = self._download_webpage(
+
+        video = self._download_json(
             'http://rutube.ru/api/video/%s/?format=json' % video_id,
             video_id, 'Downloading video JSON')
-        video = json.loads(api_response)
-        
-        api_response = self._download_webpage(
+
+        trackinfo = self._download_json(
             'http://rutube.ru/api/play/trackinfo/%s/?format=json' % video_id,
             video_id, 'Downloading trackinfo JSON')
-        trackinfo = json.loads(api_response)
-        
+
         # Some videos don't have the author field
         author = trackinfo.get('author') or {}
         m3u8_url = trackinfo['video_balancer'].get('m3u8')
@@ -82,10 +79,9 @@ class RutubeChannelIE(InfoExtractor):
     def _extract_videos(self, channel_id, channel_title=None):
         entries = []
         for pagenum in itertools.count(1):
-            api_response = self._download_webpage(
+            page = self._download_json(
                 self._PAGE_TEMPLATE % (channel_id, pagenum),
                 channel_id, 'Downloading page %s' % pagenum)
-            page = json.loads(api_response)
             results = page['results']
             if not results:
                 break
@@ -111,10 +107,9 @@ class RutubeMovieIE(RutubeChannelIE):
     def _real_extract(self, url):
         mobj = re.match(self._VALID_URL, url)
         movie_id = mobj.group('id')
-        api_response = self._download_webpage(
+        movie = self._download_json(
             self._MOVIE_TEMPLATE % movie_id, movie_id,
             'Downloading movie JSON')
-        movie = json.loads(api_response)
         movie_name = movie['name']
         return self._extract_videos(movie_id, movie_name)