[kaltura] Add support for referrer protected videos (#7409)

youtube_dl/extractor/kaltura.py

@@ -2,12 +2,17 @@
 from __future__ import unicode_literals
 
 import re
+import base64
 
 from .common import InfoExtractor
-from ..compat import compat_urllib_parse
+from ..compat import (
+    compat_urllib_parse,
+    compat_urlparse,
+)
 from ..utils import (
     ExtractorError,
     int_or_none,
+    unsmuggle_url,
 )
 
 
@@ -121,13 +126,28 @@ class KalturaIE(InfoExtractor):
             video_id, actions, note='Downloading video info JSON')
 
     def _real_extract(self, url):
+        url, smuggled_data = unsmuggle_url(url, {})
+
         mobj = re.match(self._VALID_URL, url)
         partner_id = mobj.group('partner_id_s') or mobj.group('partner_id') or mobj.group('partner_id_html5')
         entry_id = mobj.group('id_s') or mobj.group('id') or mobj.group('id_html5')
 
         info, source_data = self._get_video_info(entry_id, partner_id)
 
-        formats = [{
+        source_url = smuggled_data.get('source_url')
+        if source_url:
+            referrer = base64.b64encode(
+                '://'.join(compat_urlparse.urlparse(source_url)[:2])
+                .encode('utf-8')).decode('utf-8')
+        else:
+            referrer = None
+
+        formats = []
+        for f in source_data['flavorAssets']:
+            video_url = '%s/flavorId/%s' % (info['dataUrl'], f['id'])
+            if referrer:
+                video_url += '?referrer=%s' % referrer
+            formats.append({
                 'format_id': '%(fileExt)s-%(bitrate)s' % f,
                 'ext': f['fileExt'],
                 'tbr': f['bitrate'],
@@ -137,8 +157,9 @@ class KalturaIE(InfoExtractor):
                 'vcodec': f.get('videoCodecId'),
                 'height': f.get('height'),
                 'width': f.get('width'),
-            'url': '%s/flavorId/%s' % (info['dataUrl'], f['id']),
-        } for f in source_data['flavorAssets']]
+                'url': video_url,
+            })
+        self._check_formats(formats, entry_id)
         self._sort_formats(formats)
 
         return {