[europa] Add new extractor for the European Commission video service.

The test URL for download is

http://ec.europa.eu/avservices/video/player.cfm?ref=I107758

Fixes #6528 and #6538

youtube_dl/extractor/__init__.py

@@ -158,6 +158,7 @@ from .eroprofile import EroProfileIE
 from .escapist import EscapistIE
 from .espn import ESPNIE
 from .esri import EsriVideoIE
+from .europa import EuropaIE
 from .everyonesmixtape import EveryonesMixtapeIE
 from .exfm import ExfmIE
 from .expotv import ExpoTVIE

youtube_dl/extractor/europa.py

@@ -0,0 +1,60 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..utils import (
+    compat_urlparse,
+    xpath_text
+)
+
+
+class EuropaIE(InfoExtractor):
+    _VALID_URL = r'https?://ec\.europa\.eu/avservices/video/player\.cfm\?(?:[^&]|&(?!ref))*ref=(?P<id>[A-Za-z0-9]+)'
+    _TEST = {
+        'url': 'http://ec.europa.eu/avservices/video/player.cfm?ref=I107758',
+        'md5': '728cca2fd41d5aa7350cec1141fbe620',
+        'info_dict': {
+            'id': 'I107758',
+            'ext': 'mp4',
+            'title': 'TRADE - Wikileaks on TTIP',
+            'description': 'NEW  LIVE EC Midday press briefing of 11/08/2015',
+            'thumbnail': 're:^http://defiris\.ec\.streamcloud\.be/findmedia/18/107758/THUMB_[0-9A-Z]+\.jpg$'
+        }
+    }
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+        query = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
+        lang = query.get('sitelang', ['en'])[0]
+
+        playlist = self._download_xml('http://ec.europa.eu/avservices/video/player/playlist.cfm?ID=' + video_id, video_id)
+        videos = {}
+        formats = []
+
+        for item in playlist.findall('info/title/item'):
+            videos[xpath_text(item, 'lg')] = {'title': xpath_text(item, 'label').strip()}
+
+        for item in playlist.findall('info/description/item'):
+            videos[xpath_text(item, 'lg')]['description'] = xpath_text(item, 'label').strip()
+
+        for item in playlist.findall('files/file'):
+            lg = xpath_text(item, 'lg')
+            vid = videos[lg]
+            vid['format_note'] = xpath_text(item, 'lglabel')
+            vid['url'] = xpath_text(item, 'url')
+
+            if lg == lang:
+                vid['language_preference'] = 10
+
+            formats.append(vid)
+
+        formats.reverse()
+        def_video = videos.get(lang, videos['int'])
+
+        return {
+            'id': video_id,
+            'title': def_video['title'],
+            'description': def_video['description'],
+            'thumbnail': xpath_text(playlist, 'info/thumburl', 'thumburl'),
+            'formats': formats
+        }