[ted] Added support for subtitle download

test/test_ted_subtitles.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+
+import sys
+import unittest
+import hashlib
+
+# Allow direct execution
+import os
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from youtube_dl.extractor import TEDIE
+from youtube_dl.utils import *
+from helper import FakeYDL
+
+md5 = lambda s: hashlib.md5(s.encode('utf-8')).hexdigest()
+
+class TestTedSubtitles(unittest.TestCase):
+    def setUp(self):
+        self.DL = FakeYDL()
+        self.url = 'http://www.ted.com/talks/dan_dennett_on_our_consciousness.html'
+    def getInfoDict(self):
+        IE = TEDIE(self.DL)
+        info_dict = IE.extract(self.url)
+        return info_dict
+    def getSubtitles(self):
+        info_dict = self.getInfoDict()
+        return info_dict[0]['subtitles']
+    def test_no_writesubtitles(self):
+        subtitles = self.getSubtitles()
+        self.assertEqual(subtitles, None)
+    def test_subtitles(self):
+        self.DL.params['writesubtitles'] = True
+        subtitles = self.getSubtitles()
+        self.assertEqual(md5(subtitles['en']), '2154f31ff9b9f89a0aa671537559c21d')
+    def test_subtitles_lang(self):
+        self.DL.params['writesubtitles'] = True
+        self.DL.params['subtitleslangs'] = ['fr']
+        subtitles = self.getSubtitles()
+        self.assertEqual(md5(subtitles['fr']), '7616cbc6df20ec2c1204083c83871cf6')
+    def test_allsubtitles(self):
+        self.DL.params['writesubtitles'] = True
+        self.DL.params['allsubtitles'] = True
+        subtitles = self.getSubtitles()
+        self.assertEqual(len(subtitles.keys()), 28)
+    def test_list_subtitles(self):
+        self.DL.params['listsubtitles'] = True
+        info_dict = self.getInfoDict()
+        self.assertEqual(info_dict, [None])
+    def test_automatic_captions(self):
+        self.DL.params['writeautomaticsub'] = True
+        self.DL.params['subtitleslang'] = ['en']
+        subtitles = self.getSubtitles()
+        self.assertTrue(len(subtitles.keys()) == 0)
+    def test_multiple_langs(self):
+        self.DL.params['writesubtitles'] = True
+        langs = ['es', 'fr', 'de']
+        self.DL.params['subtitleslangs'] = langs
+        subtitles = self.getSubtitles()
+        for lang in langs:
+            self.assertTrue(subtitles.get(lang) is not None, u'Subtitles for \'%s\' not extracted' % lang)
+
+if __name__ == '__main__':
+    unittest.main()

youtube_dl/extractor/ted.py

@@ -1,10 +1,9 @@
 import json
 import re
 
-from .common import InfoExtractor
+from .subtitles import SubtitlesInfoExtractor
 
-
-class TEDIE(InfoExtractor):
+class TEDIE(SubtitlesInfoExtractor):
     _VALID_URL=r'''http://www\.ted\.com/
                    (
                         ((?P<type_playlist>playlists)/(?P<playlist_id>\d+)) # We have a playlist
@@ -82,11 +81,21 @@ def _talk_info(self, url, video_id=0):
             'url': stream['file'],
             'format': stream['id']
             } for stream in info['htmlStreams']]
+
+        video_id = info['id']
+
+        # subtitles
+        video_subtitles = self.extract_subtitles(video_id, webpage)
+        if self._downloader.params.get('listsubtitles', False):
+            self._list_available_subtitles(video_id, webpage)
+            return
+
         info = {
-            'id': info['id'],
+            'id': video_id,
             'title': title,
             'thumbnail': thumbnail,
             'description': desc,
+            'subtitles': video_subtitles,
             'formats': formats,
         }
 
@@ -94,3 +103,14 @@ def _talk_info(self, url, video_id=0):
         info.update(info['formats'][-1])
 
         return info
+
+    def _get_available_subtitles(self, video_id, webpage):
+        options = self._search_regex(r'(?:<select name="subtitles_language_select" id="subtitles_language_select">)(.*?)(?:</select>)', webpage, 'subtitles_language_select', flags=re.DOTALL)
+        languages = re.findall(r'(?:<option value=")(\S+)"', options)
+        if languages:
+            sub_lang_list = {}
+            for l in languages:
+                url = 'http://www.ted.com/talks/subtitles/id/%s/lang/%s/format/srt' % (video_id, l)
+                sub_lang_list[l] = url
+            return sub_lang_list
+        return {}