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# coding: utf-8
from __future__ import unicode_literals
import re
from .common import InfoExtractor
from ..compat import compat_parse_qs
from ..utils import (
ExtractorError,
xpath_text,
clean_html,
)
class OpenClassRoomIE(InfoExtractor):
_VALID_URL = r'https?://openclassroom\.stanford\.edu/MainFolder/VideoPage\.php\?(?P<query>.*)'
_TEST = {
'url': 'http://openclassroom.stanford.edu/MainFolder/VideoPage.php?course=PracticalUnix&video=intro-environment&speed=100',
'md5': '544a9468546059d4e80d76265b0443b8',
'info_dict': {
'id': 'intro-environment',
'ext': 'mp4',
'title': 'Intro Environment',
'description': 'md5:7d57306c8649f814ca00bb80dada600e',
}
}
_URL_TEMPLATE = 'http://openclassroom.stanford.edu/MainFolder/courses/%s/videos/%s'
def _real_extract(self, url):
qs = compat_parse_qs(re.match(self._VALID_URL, url).group('query'))
if not qs.get('course') or not qs.get('video'):
raise ExtractorError('Unsupported URL', expected=True)
video_id = qs['video'][0]
video_doc = self._download_xml(
self._URL_TEMPLATE % (qs['course'][0], video_id + '.xml'), video_id)
return {
'id': video_id,
'title': xpath_text(video_doc, 'title', 'title', True),
'url': self._URL_TEMPLATE % (qs['course'][0], xpath_text(
video_doc, 'videoFile', 'video url', True)),
'description': clean_html(xpath_text(video_doc, 'text')),
}
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