[subtitles] Use self._download_webpage for extracting the subtitles

It raises ExtractorError for the same exceptions we have to catch.

1 files changed, 4 insertions, 3 deletions

diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index 3bba45b79..d06cc49c4 100644
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -454,10 +454,11 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
             return self._decrypt_signature(s)
 
     def _get_available_subtitles(self, video_id):
-        request = compat_urllib_request.Request('http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id)
         try:
-            sub_list = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
+            sub_list = self._download_webpage(
+                'http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id,
+                video_id, note=False)
+        except ExtractorError as err:
             self._downloader.report_warning(u'unable to download video subtitles: %s' % compat_str(err))
             return {}
         lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)