forked from Mirrors/l1ving_youtube-dl
[frontendmasters] Add extractor
Luca Cherubin
6 years ago
committed by
Sergey M․
parent
4742150788
commit
6868d272e5
@ -0,0 +1,271 @@
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# coding: utf-8
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from __future__ import unicode_literals
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import collections
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import re
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from .common import InfoExtractor
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from ..compat import (
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compat_urlparse)
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from ..utils import (
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ExtractorError,
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urlencode_postdata,
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qualities, unescapeHTML)
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class FrontEndMasterBaseIE(InfoExtractor):
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_API_BASE = 'https://api.frontendmasters.com/v1/kabuki/courses'
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_VIDEO_BASE = 'http://www.frontendmasters.com/courses'
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_CAPTIONS_BASE = 'https://api.frontendmasters.com/v1/kabuki/transcripts'
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_COOKIES_BASE = 'https://api.frontendmasters.com'
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_LOGIN_URL = 'https://frontendmasters.com/login/'
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_QUALITIES_PREFERENCE = ('low', 'medium', 'high')
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_QUALITIES = {
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'low': {'width': 480, 'height': 360},
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'medium': {'width': 1280, 'height': 720},
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'high': {'width': 1920, 'height': 1080}
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}
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AllowedQuality = collections.namedtuple('AllowedQuality',
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['ext', 'qualities'])
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_ALLOWED_QUALITIES = [
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AllowedQuality('webm', ['low', 'medium', 'high']),
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AllowedQuality('mp4', ['low', 'medium', 'high'])
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]
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def _real_initialize(self):
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self._login()
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def _login(self):
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(username, password) = self._get_login_info()
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if username is None:
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return
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login_page = self._download_webpage(
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self._LOGIN_URL, None, 'Downloading login page')
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login_form = self._hidden_inputs(login_page)
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login_form.update({
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'username': username,
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'password': password
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})
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post_url = self._search_regex(
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r'<form[^>]+action=(["\'])(?P<url>.+?)\1', login_page,
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'post_url', default=self._LOGIN_URL, group='url')
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if not post_url.startswith('http'):
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post_url = compat_urlparse.urljoin(self._LOGIN_URL, post_url)
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response = self._download_webpage(
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post_url, None, 'Logging in',
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data=urlencode_postdata(login_form),
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headers={'Content-Type': 'application/x-www-form-urlencoded'}
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)
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error = self._search_regex(
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r'<div[^>]+class=["\']Message MessageAlert["\'][^>]*>'
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r'([^<]+)'
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r'</div>',
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response, 'error message', default=None)
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if error:
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raise ExtractorError('Unable to login: %s' % unescapeHTML(error),
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expected=True)
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def _download_course(self, course_id, url):
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response = self._download_json(
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'%s/%s' % (self._API_BASE, course_id), course_id,
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'Downloading course JSON',
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headers={
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'Content-Type': 'application/json;charset=utf-8',
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'Referer': url,
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})
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return response
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@staticmethod
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def _pair_section_video_element(lesson_elements):
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sections = {}
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current_section = None
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current_section_number = 0
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for elem in lesson_elements:
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if not isinstance(elem, int):
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elem_name = elem
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if not isinstance(elem_name, str):
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# convert unicode to str
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elem_name = elem.encode('utf-8')
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(current_section, current_section_number) = \
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(elem_name, current_section_number + 1)
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else:
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if current_section:
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sections[elem] = (current_section, current_section_number)
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return sections
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class FrontEndMasterIE(FrontEndMasterBaseIE):
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IE_NAME = 'frontend-masters'
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_VALID_URL = r'https?://(?:www\.)?frontendmasters\.com/courses/' \
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r'(?P<courseid>[a-z\-]+)/' \
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r'(?P<id>[a-z\-]+)'
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_NETRC_MACHINE = 'frontendmasters'
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_TEST = {
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'url': 'https://frontendmasters.com/courses/web-development/tools',
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'md5': '7f161159710d6b7016a4f4af6fcb05e2',
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'info_dict': {
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'id': 'tools',
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'title': 'Tools',
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'display_id': 'tools',
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'description': 'md5:82c1ea6472e88ed5acd1829fe992e4f7',
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'ext': 'mp4'
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},
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'skip': 'Requires FrontendMasters account credentials',
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}
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def _get_subtitles(self, video_hash, video_id):
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captions = self._download_webpage(
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'%s/%s.vtt' % (self._CAPTIONS_BASE, video_hash), video_id,
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fatal=False)
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if captions:
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return {
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'en': [{
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'ext': 'vtt',
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'data': captions
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}]
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}
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def _real_extract(self, url):
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mobj = re.match(self._VALID_URL, url)
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video_id = mobj.group('id')
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course_id = mobj.group('courseid')
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course_json_content = self._download_course(course_id=course_id,
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url=url)
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# Necessary to get mandatory informations like title and video_url
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lesson_index = course_json_content.get('lessonSlugs').index(video_id)
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lesson_hash = course_json_content.get('lessonHashes')[lesson_index]
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lesson_data = course_json_content.get('lessonData')[lesson_hash]
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# This is necessary to get the link for the video
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lesson_source_base = lesson_data['sourceBase']
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lesson_title = lesson_data['title']
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# Some optional fields
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lesson_description = lesson_data.get('description')
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lesson_index = lesson_data.get('index')
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lesson_slug = lesson_data.get('slug')
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lesson_thumbnail_url = lesson_data.get('thumbnail')
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lesson_section_elements = course_json_content.get('lessonElements')
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try:
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course_sections_pairing = self._pair_section_video_element(
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lesson_section_elements)
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lesson_section = \
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course_sections_pairing.get(lesson_index)[0]
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lesson_section_number = \
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course_sections_pairing.get(lesson_index)[1]
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except Exception:
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lesson_section = None
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lesson_section_number = None
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video_request_url = '%s/source'
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video_request_headers = {
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'origin': 'https://frontendmasters.com',
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'referer': lesson_source_base,
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}
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quality_key = qualities(self._QUALITIES_PREFERENCE)
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formats = []
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for ext, qualities_ in self._ALLOWED_QUALITIES:
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for quality in qualities_:
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f = self._QUALITIES[quality].copy()
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video_request_params = {
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'r': f['height'],
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'f': ext
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}
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video_response = self._download_json(
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video_request_url % lesson_source_base, video_id,
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query=video_request_params, headers=video_request_headers)
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video_url = video_response.get('url')
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clip_f = f.copy()
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clip_f.update({
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'url': video_url,
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'ext': ext,
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'format_id': '%s-%s' % (ext, quality),
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'quality': quality_key(quality),
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'height': f['height']
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})
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formats.append(clip_f)
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self._sort_formats(formats)
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subtitles = self.extract_subtitles(lesson_hash, video_id)
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return {
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'id': video_id,
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'display_id': lesson_slug,
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'title': lesson_title,
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'description': lesson_description,
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'chapter': lesson_section,
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'chapter_number': lesson_section_number,
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'thumbnail': lesson_thumbnail_url,
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'formats': formats,
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'subtitles': subtitles
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}
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class FrontEndMasterCourseIE(FrontEndMasterBaseIE):
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IE_NAME = 'frontend-masters:course'
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_VALID_URL = r'https?://(?:www\.)?frontendmasters\.com/courses/(?P<courseid>[a-z\-]+)/?$'
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_NETRC_MACHINE = 'frontendmasters'
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_TEST = {
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'url': 'https://frontendmasters.com/courses/javascript-basics/',
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'info_dict': {
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'id': 'javascript-basics',
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'title': 'Introduction to JavaScript Programming',
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'description': 'md5:269412fbb76d86954761599ad8e4cbc9'
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},
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'playlist_count': 19,
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'skip': 'Requires FrontendMasters account credentials'
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}
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@classmethod
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def suitable(cls, url):
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return False if FrontEndMasterIE.suitable(url) else super(FrontEndMasterBaseIE, cls).suitable(url)
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def _real_extract(self, url):
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mobj = re.match(self._VALID_URL, url)
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course_id = mobj.group('courseid')
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course_json_content = self._download_course(course_id=course_id,
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url=url)
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title = course_json_content.get('title')
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description = course_json_content.get('description')
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course_display_id = course_json_content.get('slug')
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videos_data = course_json_content.get('lessonData').values()
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videos_data = sorted(videos_data, key=lambda video: video.get('index'))
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entries = []
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for video in videos_data:
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video_slug = video.get('slug')
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clip_url = '%s/%s/%s' % (
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self._VIDEO_BASE, course_display_id, video_slug)
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entries.append({
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'_type': 'url_transparent',
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'url': clip_url,
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'ie_key': FrontEndMasterIE.ie_key()
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})
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return self.playlist_result(entries, course_id, title, description)
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