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from __future__ import unicode_literals
import re
import json
from .common import InfoExtractor
from .youtube import YoutubeIE
from ..utils import (
clean_html,
ExtractorError,
get_element_by_id,
)
class TechTVMITIE(InfoExtractor):
IE_NAME = 'techtv.mit.edu'
_VALID_URL = r'https?://techtv\.mit\.edu/(?:videos|embeds)/(?P<id>\d+)'
_TEST = {
'url': 'http://techtv.mit.edu/videos/25418-mit-dna-learning-center-set',
'md5': '00a3a27ee20d44bcaa0933ccec4a2cf7',
'info_dict': {
'id': '25418',
'ext': 'mp4',
'title': 'MIT DNA and Protein Sets',
'description': 'md5:46f5c69ce434f0a97e7c628cc142802d',
},
}
def _real_extract(self, url):
video_id = self._match_id(url)
raw_page = self._download_webpage(
'http://techtv.mit.edu/videos/%s' % video_id, video_id)
clean_page = re.compile(r'<!--.*?-->', re.S).sub('', raw_page)
base_url = self._proto_relative_url(self._search_regex(
r'ipadUrl: \'(.+?cloudfront.net/)', raw_page, 'base url'), 'http:')
formats_json = self._search_regex(
r'bitrates: (\[.+?\])', raw_page, 'video formats')
formats_mit = json.loads(formats_json)
formats = [
{
'format_id': f['label'],
'url': base_url + f['url'].partition(':')[2],
'ext': f['url'].partition(':')[0],
'format': f['label'],
'width': f['width'],
'vbr': f['bitrate'],
}
for f in formats_mit
]
title = get_element_by_id('edit-title', clean_page)
description = clean_html(get_element_by_id('edit-description', clean_page))
thumbnail = self._search_regex(
r'playlist:.*?url: \'(.+?)\'',
raw_page, 'thumbnail', flags=re.DOTALL)
return {
'id': video_id,
'title': title,
'formats': formats,
'description': description,
'thumbnail': thumbnail,
}
class OCWMITIE(InfoExtractor):
IE_NAME = 'ocw.mit.edu'
_VALID_URL = r'^https?://ocw\.mit\.edu/courses/(?P<topic>[a-z0-9\-]+)'
_BASE_URL = 'http://ocw.mit.edu/'
_TESTS = [
{
'url': 'http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-041-probabilistic-systems-analysis-and-applied-probability-fall-2010/video-lectures/lecture-7-multiple-variables-expectations-independence/',
'info_dict': {
'id': 'EObHWIEKGjA',
'ext': 'webm',
'title': 'Lecture 7: Multiple Discrete Random Variables: Expectations, Conditioning, Independence',
'description': 'In this lecture, the professor discussed multiple random variables, expectations, and binomial distribution.',
'upload_date': '20121109',
'uploader_id': 'MIT',
'uploader': 'MIT OpenCourseWare',
}
},
{
'url': 'http://ocw.mit.edu/courses/mathematics/18-01sc-single-variable-calculus-fall-2010/1.-differentiation/part-a-definition-and-basic-rules/session-1-introduction-to-derivatives/',
'info_dict': {
'id': '7K1sB05pE0A',
'ext': 'mp4',
'title': 'Session 1: Introduction to Derivatives',
'upload_date': '20090818',
'uploader_id': 'MIT',
'uploader': 'MIT OpenCourseWare',
'description': 'This section contains lecture video excerpts, lecture notes, an interactive mathlet with supporting documents, and problem solving videos.',
}
}
]
def _real_extract(self, url):
mobj = re.match(self._VALID_URL, url)
topic = mobj.group('topic')
webpage = self._download_webpage(url, topic)
title = self._html_search_meta('WT.cg_s', webpage)
description = self._html_search_meta('Description', webpage)
# search for call to ocw_embed_chapter_media(container_id, media_url, provider, page_url, image_url, start, stop, captions_file)
embed_chapter_media = re.search(r'ocw_embed_chapter_media\((.+?)\)', webpage)
if embed_chapter_media:
metadata = re.sub(r'[\'"]', '', embed_chapter_media.group(1))
metadata = re.split(r', ?', metadata)
yt = metadata[1]
else:
# search for call to ocw_embed_chapter_media(container_id, media_url, provider, page_url, image_url, captions_file)
embed_media = re.search(r'ocw_embed_media\((.+?)\)', webpage)
if embed_media:
metadata = re.sub(r'[\'"]', '', embed_media.group(1))
metadata = re.split(r', ?', metadata)
yt = metadata[1]
else:
raise ExtractorError('Unable to find embedded YouTube video.')
video_id = YoutubeIE.extract_id(yt)
return {
'_type': 'url_transparent',
'id': video_id,
'title': title,
'description': description,
'url': yt,
'ie_key': 'Youtube',
}
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