[dplay] Add extractor (closes #7515)

Since I haven't figured out how to download the hds stream, we use the hls one instead.

youtube_dl/extractor/__init__.py

@@ -132,6 +132,7 @@ from .dfb import DFBIE
 from .dhm import DHMIE
 from .dotsub import DotsubIE
 from .douyutv import DouyuTVIE
+from .dplay import DPlayIE
 from .dramafever import (
     DramaFeverIE,
     DramaFeverSeriesIE,

youtube_dl/extractor/dplay.py

@@ -0,0 +1,50 @@
+from __future__ import unicode_literals
+
+import time
+
+from .common import InfoExtractor
+from ..utils import int_or_none
+
+
+class DPlayIE(InfoExtractor):
+    _VALID_URL = r'http://www\.dplay\.se/[^/]+/(?P<id>[^/?#]+)'
+
+    _TEST = {
+        'url': 'http://www.dplay.se/nugammalt-77-handelser-som-format-sverige/season-1-svensken-lar-sig-njuta-av-livet/',
+        'info_dict': {
+            'id': '3172',
+            'ext': 'mp4',
+            'display_id': 'season-1-svensken-lar-sig-njuta-av-livet',
+            'title': 'Svensken lär sig njuta av livet',
+            'duration': 2650,
+        },
+    }
+
+    def _real_extract(self, url):
+        display_id = self._match_id(url)
+        webpage = self._download_webpage(url, display_id)
+        video_id = self._search_regex(
+            r'data-video-id="(\d+)"', webpage, 'video id')
+
+        info = self._download_json(
+            'http://www.dplay.se/api/v2/ajax/videos?video_id=' + video_id,
+            video_id)['data'][0]
+
+        self._set_cookie(
+            'secure.dplay.se', 'dsc-geo',
+            '{"countryCode":"NL","expiry":%d}' % ((time.time() + 20 * 60) * 1000))
+        # TODO: consider adding support for 'stream_type=hds', it seems to
+        # require setting some cookies
+        manifest_url = self._download_json(
+            'https://secure.dplay.se/secure/api/v2/user/authorization/stream/%s?stream_type=hls' % video_id,
+            video_id, 'Getting manifest url for hls stream')['hls']
+        formats = self._extract_m3u8_formats(
+            manifest_url, video_id, ext='mp4', entry_protocol='m3u8_native')
+
+        return {
+            'id': video_id,
+            'display_id': display_id,
+            'title': info['title'],
+            'formats': formats,
+            'duration': int_or_none(info.get('video_metadata_length'), scale=1000),
+        }