[ina] Simplify

Download the feed with ‘_download_xml’ to make the extraction easier

youtube_dl/extractor/ina.py

@@ -1,39 +1,36 @@
+# encoding: utf-8
+from __future__ import unicode_literals
+
 import re
 
 from .common import InfoExtractor
 
 
 class InaIE(InfoExtractor):
-    """Information Extractor for Ina.fr"""
-    _VALID_URL = r'(?:http://)?(?:www\.)?ina\.fr/video/(?P<id>I?[A-F0-9]+)/.*'
+    _VALID_URL = r'http://(?:www\.)?ina\.fr/video/(?P<id>I?[A-F0-9]+)/.*'
     _TEST = {
-        u'url': u'http://www.ina.fr/video/I12055569/francois-hollande-je-crois-que-c-est-clair-video.html',
-        u'file': u'I12055569.mp4',
-        u'md5': u'a667021bf2b41f8dc6049479d9bb38a3',
-        u'info_dict': {
-            u"title": u"Fran\u00e7ois Hollande \"Je crois que c'est clair\""
+        'url': 'http://www.ina.fr/video/I12055569/francois-hollande-je-crois-que-c-est-clair-video.html',
+        'md5': 'a667021bf2b41f8dc6049479d9bb38a3',
+        'info_dict': {
+            'id': 'I12055569',
+            'ext': 'mp4',
+            'title': 'François Hollande "Je crois que c\'est clair"',
         }
     }
 
-    def _real_extract(self,url):
+    def _real_extract(self, url):
         mobj = re.match(self._VALID_URL, url)
 
         video_id = mobj.group('id')
-        mrss_url='http://player.ina.fr/notices/%s.mrss' % video_id
-        video_extension = 'mp4'
-        webpage = self._download_webpage(mrss_url, video_id)
+        mrss_url = 'http://player.ina.fr/notices/%s.mrss' % video_id
+        info_doc = self._download_xml(mrss_url, video_id)
 
         self.report_extraction(video_id)
 
-        video_url = self._html_search_regex(r'<media:player url="(?P<mp4url>http://mp4.ina.fr/[^"]+\.mp4)',
-            webpage, u'video URL')
-
-        video_title = self._search_regex(r'<title><!\[CDATA\[(?P<titre>.*?)]]></title>',
-            webpage, u'title')
+        video_url = info_doc.find('.//{http://search.yahoo.com/mrss/}player').attrib['url']
 
-        return [{
-            'id':       video_id,
-            'url':      video_url,
-            'ext':      video_extension,
-            'title':    video_title,
-        }]
+        return {
+            'id': video_id,
+            'url': video_url,
+            'title': info_doc.find('.//title').text,
+        }