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