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-rw-r--r--youtube_dl/extractor/__init__.py1
-rw-r--r--youtube_dl/extractor/common.py10
-rw-r--r--youtube_dl/extractor/khanacademy.py71
3 files changed, 82 insertions, 0 deletions
diff --git a/youtube_dl/extractor/__init__.py b/youtube_dl/extractor/__init__.py
index 009d3b60f..99ba725d9 100644
--- a/youtube_dl/extractor/__init__.py
+++ b/youtube_dl/extractor/__init__.py
@@ -98,6 +98,7 @@ from .justintv import JustinTVIE
from .jpopsukitv import JpopsukiIE
from .kankan import KankanIE
from .keezmovies import KeezMoviesIE
+from .khanacademy import KhanAcademyIE
from .kickstarter import KickStarterIE
from .keek import KeekIE
from .liveleak import LiveLeakIE
diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 2a5e8076c..0ec365eaa 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -1,4 +1,5 @@
import base64
+import json
import os
import re
import socket
@@ -260,6 +261,15 @@ class InfoExtractor(object):
xml_string = transform_source(xml_string)
return xml.etree.ElementTree.fromstring(xml_string.encode('utf-8'))
+ def _download_json(self, url_or_request, video_id,
+ note=u'Downloading JSON metadata',
+ errnote=u'Unable to download JSON metadata'):
+ json_string = self._download_webpage(url_or_request, video_id, note, errnote)
+ try:
+ return json.loads(json_string)
+ except ValueError as ve:
+ raise ExtractorError('Failed to download JSON', cause=ve)
+
def report_warning(self, msg, video_id=None):
idstr = u'' if video_id is None else u'%s: ' % video_id
self._downloader.report_warning(
diff --git a/youtube_dl/extractor/khanacademy.py b/youtube_dl/extractor/khanacademy.py
new file mode 100644
index 000000000..772bb5671
--- /dev/null
+++ b/youtube_dl/extractor/khanacademy.py
@@ -0,0 +1,71 @@
+from __future__ import unicode_literals
+
+import re
+
+from .common import InfoExtractor
+from ..utils import (
+ unified_strdate,
+)
+
+
+class KhanAcademyIE(InfoExtractor):
+ _VALID_URL = r'^https?://(?:www\.)?khanacademy\.org/(?P<key>[^/]+)/(?:[^/]+/){,2}(?P<id>[^?#/]+)(?:$|[?#])'
+ IE_NAME = 'KhanAcademy'
+
+ _TEST = {
+ 'url': 'http://www.khanacademy.org/video/one-time-pad',
+ 'file': 'one-time-pad.mp4',
+ 'md5': '7021db7f2d47d4fff89b13177cb1e8f4',
+ 'info_dict': {
+ 'title': 'The one-time pad',
+ 'description': 'The perfect cipher',
+ 'duration': 176,
+ 'uploader': 'Brit Cruise',
+ 'upload_date': '20120411',
+ }
+ }
+
+ def _real_extract(self, url):
+ m = re.match(self._VALID_URL, url)
+ video_id = m.group('id')
+
+ if m.group('key') == 'video':
+ data = self._download_json(
+ 'http://api.khanacademy.org/api/v1/videos/' + video_id,
+ video_id, 'Downloading video info')
+
+ upload_date = unified_strdate(data['date_added'])
+ uploader = ', '.join(data['author_names'])
+ return {
+ '_type': 'url_transparent',
+ 'url': data['url'],
+ 'id': video_id,
+ 'title': data['title'],
+ 'thumbnail': data['image_url'],
+ 'duration': data['duration'],
+ 'description': data['description'],
+ 'uploader': uploader,
+ 'upload_date': upload_date,
+ }
+ else:
+ # topic
+ data = self._download_json(
+ 'http://api.khanacademy.org/api/v1/topic/' + video_id,
+ video_id, 'Downloading topic info')
+
+ entries = [
+ {
+ '_type': 'url',
+ 'url': c['url'],
+ 'id': c['id'],
+ 'title': c['title'],
+ }
+ for c in data['children'] if c['kind'] in ('Video', 'Topic')]
+
+ return {
+ '_type': 'playlist',
+ 'id': video_id,
+ 'title': data['title'],
+ 'description': data['description'],
+ 'entries': entries,
+ }