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b72f6163dc
youtube-dl/youtube_dl/extractor/udemy.py
Sergey M․ f20756fb10 [udemy] Fix non free course message
2016-01-06 00:03:39 +06:00

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Python
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from __future__ import unicode_literals
from .common import InfoExtractor
from ..compat import (
compat_HTTPError,
compat_urllib_parse,
compat_urllib_request,
)
from ..utils import (
ExtractorError,
float_or_none,
int_or_none,
sanitized_Request,
unescapeHTML,
)
class UdemyIE(InfoExtractor):
IE_NAME = 'udemy'
_VALID_URL = r'https?://www\.udemy\.com/(?:[^#]+#/lecture/|lecture/view/?\?lectureId=)(?P<id>\d+)'
_LOGIN_URL = 'https://www.udemy.com/join/login-popup/?displayType=ajax&showSkipButton=1'
_ORIGIN_URL = 'https://www.udemy.com'
_NETRC_MACHINE = 'udemy'
_TESTS = [{
'url': 'https://www.udemy.com/java-tutorial/#/lecture/172757',
'md5': '98eda5b657e752cf945d8445e261b5c5',
'info_dict': {
'id': '160614',
'ext': 'mp4',
'title': 'Introduction and Installation',
'description': 'md5:c0d51f6f21ef4ec65f091055a5eef876',
'duration': 579.29,
},
'skip': 'Requires udemy account credentials',
}]
def _enroll_course(self, webpage, course_id):
checkout_url = unescapeHTML(self._search_regex(
r'href=(["\'])(?P<url>https?://(?:www\.)?udemy\.com/payment/checkout/.+?)\1',
webpage, 'checkout url', group='url', default=None))
if checkout_url:
raise ExtractorError(
'Course %s is not free. You have to pay for it before you can download. '
'Use this URL to confirm purchase: %s' % (course_id, checkout_url), expected=True)
enroll_url = unescapeHTML(self._search_regex(
r'href=(["\'])(?P<url>https?://(?:www\.)?udemy\.com/course/subscribe/.+?)\1',
webpage, 'enroll url', group='url', default=None))
if enroll_url:
webpage = self._download_webpage(enroll_url, course_id, 'Enrolling in the course')
if '>You have enrolled in' in webpage:
self.to_screen('%s: Successfully enrolled in the course' % course_id)
def _download_lecture(self, course_id, lecture_id):
return self._download_json(
'https://www.udemy.com/api-2.0/users/me/subscribed-courses/%s/lectures/%s?%s' % (
course_id, lecture_id, compat_urllib_parse.urlencode({
'video_only': '',
'auto_play': '',
'fields[lecture]': 'title,description,asset',
'fields[asset]': 'asset_type,stream_url,thumbnail_url,download_urls,data',
'instructorPreviewMode': 'False',
})),
lecture_id, 'Downloading lecture JSON')
def _handle_error(self, response):
if not isinstance(response, dict):
return
error = response.get('error')
if error:
error_str = 'Udemy returned error #%s: %s' % (error.get('code'), error.get('message'))
error_data = error.get('data')
if error_data:
error_str += ' - %s' % error_data.get('formErrors')
raise ExtractorError(error_str, expected=True)
def _download_json(self, url_or_request, video_id, note='Downloading JSON metadata'):
headers = {
'X-Udemy-Snail-Case': 'true',
'X-Requested-With': 'XMLHttpRequest',
}
for cookie in self._downloader.cookiejar:
if cookie.name == 'client_id':
headers['X-Udemy-Client-Id'] = cookie.value
elif cookie.name == 'access_token':
headers['X-Udemy-Bearer-Token'] = cookie.value
headers['X-Udemy-Authorization'] = 'Bearer %s' % cookie.value
if isinstance(url_or_request, compat_urllib_request.Request):
for header, value in headers.items():
url_or_request.add_header(header, value)
else:
url_or_request = sanitized_Request(url_or_request, headers=headers)
response = super(UdemyIE, self)._download_json(url_or_request, video_id, note)
self._handle_error(response)
return response
def _real_initialize(self):
self._login()
def _login(self):
(username, password) = self._get_login_info()
if username is None:
return
login_popup = self._download_webpage(
self._LOGIN_URL, None, 'Downloading login popup')
def is_logged(webpage):
return any(p in webpage for p in ['href="https://www.udemy.com/user/logout/', '>Logout<'])
# already logged in
if is_logged(login_popup):
return
login_form = self._form_hidden_inputs('login-form', login_popup)
login_form.update({
'email': username.encode('utf-8'),
'password': password.encode('utf-8'),
})
request = sanitized_Request(
self._LOGIN_URL, compat_urllib_parse.urlencode(login_form).encode('utf-8'))
request.add_header('Referer', self._ORIGIN_URL)
request.add_header('Origin', self._ORIGIN_URL)
response = self._download_webpage(
request, None, 'Logging in as %s' % username)
if not is_logged(response):
error = self._html_search_regex(
r'(?s)<div[^>]+class="form-errors[^"]*">(.+?)</div>',
response, 'error message', default=None)
if error:
raise ExtractorError('Unable to login: %s' % error, expected=True)
raise ExtractorError('Unable to log in')
def _real_extract(self, url):
lecture_id = self._match_id(url)
webpage = self._download_webpage(url, lecture_id)
course_id = self._search_regex(
r'data-course-id=["\'](\d+)', webpage, 'course id')
try:
lecture = self._download_lecture(course_id, lecture_id)
except ExtractorError as e:
# Error could possibly mean we are not enrolled in the course
if isinstance(e.cause, compat_HTTPError) and e.cause.code == 403:
self._enroll_course(webpage, course_id)
lecture = self._download_lecture(course_id, lecture_id)
else:
raise
title = lecture['title']
description = lecture.get('description')
asset = lecture['asset']
asset_type = asset.get('assetType') or asset.get('asset_type')
if asset_type != 'Video':
raise ExtractorError(
'Lecture %s is not a video' % lecture_id, expected=True)
stream_url = asset.get('streamUrl') or asset.get('stream_url')
if stream_url:
youtube_url = self._search_regex(
r'(https?://www\.youtube\.com/watch\?v=.*)', stream_url, 'youtube URL', default=None)
if youtube_url:
return self.url_result(youtube_url, 'Youtube')
video_id = asset['id']
thumbnail = asset.get('thumbnailUrl') or asset.get('thumbnail_url')
duration = float_or_none(asset.get('data', {}).get('duration'))
outputs = asset.get('data', {}).get('outputs', {})
formats = []
for format_ in asset.get('download_urls', {}).get('Video', []):
video_url = format_.get('file')
if not video_url:
continue
format_id = format_.get('label')
f = {
'url': format_['file'],
'height': int_or_none(format_id),
}
if format_id:
# Some videos contain additional metadata (e.g.
# https://www.udemy.com/ios9-swift/learn/#/lecture/3383208)
output = outputs.get(format_id)
if isinstance(output, dict):
f.update({
'format_id': '%sp' % (output.get('label') or format_id),
'width': int_or_none(output.get('width')),
'height': int_or_none(output.get('height')),
'vbr': int_or_none(output.get('video_bitrate_in_kbps')),
'vcodec': output.get('video_codec'),
'fps': int_or_none(output.get('frame_rate')),
'abr': int_or_none(output.get('audio_bitrate_in_kbps')),
'acodec': output.get('audio_codec'),
'asr': int_or_none(output.get('audio_sample_rate')),
'tbr': int_or_none(output.get('total_bitrate_in_kbps')),
'filesize': int_or_none(output.get('file_size_in_bytes')),
})
else:
f['format_id'] = '%sp' % format_id
formats.append(f)
self._sort_formats(formats)
return {
'id': video_id,
'title': title,
'description': description,
'thumbnail': thumbnail,
'duration': duration,
'formats': formats
}
class UdemyCourseIE(UdemyIE):
IE_NAME = 'udemy:course'
_VALID_URL = r'https?://www\.udemy\.com/(?P<id>[\da-z-]+)'
_TESTS = []
@classmethod
def suitable(cls, url):
return False if UdemyIE.suitable(url) else super(UdemyCourseIE, cls).suitable(url)
def _real_extract(self, url):
course_path = self._match_id(url)
webpage = self._download_webpage(url, course_path)
response = self._download_json(
'https://www.udemy.com/api-1.1/courses/%s' % course_path,
course_path, 'Downloading course JSON')
course_id = response['id']
course_title = response.get('title')
self._enroll_course(webpage, course_id)
response = self._download_json(
'https://www.udemy.com/api-1.1/courses/%s/curriculum' % course_id,
course_id, 'Downloading course curriculum')
entries = []
chapter, chapter_number = None, None
for asset in response:
asset_type = asset.get('assetType') or asset.get('asset_type')
if asset_type == 'Video':
asset_id = asset.get('id')
if asset_id:
entry = {
'_type': 'url_transparent',
'url': 'https://www.udemy.com/%s/#/lecture/%s' % (course_path, asset['id']),
'ie_key': UdemyIE.ie_key(),
}
if chapter_number:
entry['chapter_number'] = chapter_number
if chapter:
entry['chapter'] = chapter
entries.append(entry)
elif asset.get('type') == 'chapter':
chapter_number = asset.get('index') or asset.get('object_index')
chapter = asset.get('title')
return self.playlist_result(entries, course_id, course_title)
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