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[udemy] Semi-switch to api 2.0 (Closes #7704) 

* Use api 2.0 to get lectures since it provides more formats
* Fix authorization for api 2.0
* Autotry enrolling in the course for single lectures
* Extract additional metadata rom asset['data']['outputs']
This commit is contained in:
Sergey M․ 2015-12-02 00:48:27 +06:00
parent 78717fc328
commit 328f82d59a
1 changed files with 95 additions and 65 deletions
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160
youtube_dl/extractor/udemy.py
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@ -1,14 +1,15 @@
from __future__ import unicode_literals
import re
from .common import InfoExtractor
from ..compat import (
compat_HTTPError,
compat_urllib_parse,
compat_urllib_request,
compat_urlparse,
)
from ..utils import (
ExtractorError,
float_or_none,
int_or_none,
sanitized_Request,
)
@ -19,6 +20,8 @@ class UdemyIE(InfoExtractor):
_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'
_SUCCESSFULLY_ENROLLED = '>You have enrolled in this course!<'
_ALREADY_ENROLLED = '>You are already taking this course.<'
_NETRC_MACHINE = 'udemy'
_TESTS = [{
@ -34,6 +37,29 @@ class UdemyIE(InfoExtractor):
'skip': 'Requires udemy account credentials',
}]
def _enroll_course(self, webpage, course_id):
enroll_url = self._search_regex(
r'href=(["\'])(?P<url>https?://(?:www\.)?udemy\.com/course/subscribe/.+?)\1',
webpage, 'enroll url', group='url',
default='https://www.udemy.com/course/subscribe/?courseId=%s' % course_id)
webpage = self._download_webpage(enroll_url, course_id, 'Enrolling in the course')
if self._SUCCESSFULLY_ENROLLED in webpage:
self.to_screen('%s: Successfully enrolled in' % course_id)
elif self._ALREADY_ENROLLED in webpage:
self.to_screen('%s: Already enrolled in' % 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', fatal=False)
def _handle_error(self, response):
if not isinstance(response, dict):
return
@ -45,7 +71,7 @@ class UdemyIE(InfoExtractor):
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'):
def _download_json(self, url_or_request, video_id, note='Downloading JSON metadata', *args, **kwargs):
headers = {
'X-Udemy-Snail-Case': 'true',
'X-Requested-With': 'XMLHttpRequest',
@ -55,6 +81,7 @@ class UdemyIE(InfoExtractor):
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():
@ -62,7 +89,7 @@ class UdemyIE(InfoExtractor):
else:
url_or_request = sanitized_Request(url_or_request, headers=headers)
response = super(UdemyIE, self)._download_json(url_or_request, video_id, note)
response = super(UdemyIE, self)._download_json(url_or_request, video_id, note, *args, **kwargs)
self._handle_error(response)
return response
@ -110,66 +137,77 @@ class UdemyIE(InfoExtractor):
def _real_extract(self, url):
lecture_id = self._match_id(url)
lecture = self._download_json(
'https://www.udemy.com/api-1.1/lectures/%s' % lecture_id,
lecture_id, 'Downloading lecture JSON')
webpage = self._download_webpage(url, lecture_id)
asset_type = lecture.get('assetType') or lecture.get('asset_type')
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_id = 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)
asset = lecture['asset']
stream_url = asset.get('streamUrl') or asset.get('stream_url')
mobj = re.search(r'(https?://www\.youtube\.com/watch\?v=.*)', stream_url)
if mobj:
return self.url_result(mobj.group(1), 'Youtube')
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 = int_or_none(asset.get('data', {}).get('duration'))
duration = float_or_none(asset.get('data', {}).get('duration'))
outputs = asset.get('data', {}).get('outputs', {})
download_url = asset.get('downloadUrl') or asset.get('download_url')
video = download_url.get('Video') or download_url.get('video')
video_480p = download_url.get('Video480p') or download_url.get('video_480p')
formats = [{
'url': video_480p[0],
'format_id': 'download-360p',
}, {
'url': video[0],
'format_id': 'download-720p',
}]
# Some videos also contain formats in asset['data']['outputs'] (e.g.
# https://www.udemy.com/ios9-swift/learn/#/lecture/3383208)
outputs = asset.get('data', {}).get('outputs')
if isinstance(outputs, dict):
for format_id, f in outputs.items():
video_url = f.get('url')
if video_url:
formats.append({
'url': video_url,
'format_id': '%sp' % (f.get('labe1l') or format_id),
'width': int_or_none(f.get('width')),
'height': int_or_none(f.get('height')),
'vbr': int_or_none(f.get('video_bitrate_in_kbps')),
'vcodec': f.get('video_codec'),
'fps': int_or_none(f.get('frame_rate')),
'abr': int_or_none(f.get('audio_bitrate_in_kbps')),
'acodec': f.get('audio_codec'),
'asr': int_or_none(f.get('audio_sample_rate')),
'tbr': int_or_none(f.get('total_bitrate_in_kbps')),
'filesize': int_or_none(f.get('file_size_in_bytes')),
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)
title = lecture['title']
description = lecture.get('description')
return {
'id': video_id,
'title': title,
@ -182,9 +220,7 @@ class UdemyIE(InfoExtractor):
class UdemyCourseIE(UdemyIE):
IE_NAME = 'udemy:course'
_VALID_URL = r'https?://www\.udemy\.com/(?P<coursepath>[\da-z-]+)'
_SUCCESSFULLY_ENROLLED = '>You have enrolled in this course!<'
_ALREADY_ENROLLED = '>You are already taking this course.<'
_VALID_URL = r'https?://www\.udemy\.com/(?P<id>[\da-z-]+)'
_TESTS = []
@classmethod
@ -192,24 +228,18 @@ class UdemyCourseIE(UdemyIE):
return False if UdemyIE.suitable(url) else super(UdemyCourseIE, cls).suitable(url)
def _real_extract(self, url):
mobj = re.match(self._VALID_URL, url)
course_path = mobj.group('coursepath')
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 = int(response['id'])
course_title = response['title']
course_id = response['id']
course_title = response.get('title')
webpage = self._download_webpage(
'https://www.udemy.com/course/subscribe/?courseId=%s' % course_id,
course_id, 'Enrolling in the course')
if self._SUCCESSFULLY_ENROLLED in webpage:
self.to_screen('%s: Successfully enrolled in' % course_id)
elif self._ALREADY_ENROLLED in webpage:
self.to_screen('%s: Already enrolled in' % course_id)
self._enroll_course(webpage, course_id)
response = self._download_json(
'https://www.udemy.com/api-1.1/courses/%s/curriculum' % course_id,