317 lines
11 KiB
Python
317 lines
11 KiB
Python
from __future__ import unicode_literals
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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_HTTPError,
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compat_str,
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compat_urlparse,
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)
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from ..utils import (
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ExtractorError,
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int_or_none,
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urlencode_postdata,
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)
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class LyndaBaseIE(InfoExtractor):
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_SIGNIN_URL = 'https://www.lynda.com/signin'
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_PASSWORD_URL = 'https://www.lynda.com/signin/password'
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_USER_URL = 'https://www.lynda.com/signin/user'
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_ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'
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_NETRC_MACHINE = 'lynda'
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def _real_initialize(self):
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self._login()
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@staticmethod
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def _check_error(json_string, key_or_keys):
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keys = [key_or_keys] if isinstance(key_or_keys, compat_str) else key_or_keys
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for key in keys:
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error = json_string.get(key)
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if error:
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raise ExtractorError('Unable to login: %s' % error, expected=True)
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def _login_step(self, form_html, fallback_action_url, extra_form_data, note, referrer_url):
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action_url = self._search_regex(
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r'<form[^>]+action=(["\'])(?P<url>.+?)\1', form_html,
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'post url', default=fallback_action_url, group='url')
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if not action_url.startswith('http'):
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action_url = compat_urlparse.urljoin(self._SIGNIN_URL, action_url)
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form_data = self._hidden_inputs(form_html)
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form_data.update(extra_form_data)
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try:
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response = self._download_json(
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action_url, None, note,
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data=urlencode_postdata(form_data),
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headers={
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'Referer': referrer_url,
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'X-Requested-With': 'XMLHttpRequest',
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})
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except ExtractorError as e:
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if isinstance(e.cause, compat_HTTPError) and e.cause.code == 500:
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response = self._parse_json(e.cause.read().decode('utf-8'), None)
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self._check_error(response, ('email', 'password'))
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raise
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self._check_error(response, 'ErrorMessage')
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return response, action_url
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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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# Step 1: download signin page
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signin_page = self._download_webpage(
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self._SIGNIN_URL, None, 'Downloading signin page')
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# Already logged in
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if any(re.search(p, signin_page) for p in (
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r'isLoggedIn\s*:\s*true', r'logout\.aspx', r'>Log out<')):
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return
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# Step 2: submit email
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signin_form = self._search_regex(
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r'(?s)(<form[^>]+data-form-name=["\']signin["\'][^>]*>.+?</form>)',
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signin_page, 'signin form')
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signin_page, signin_url = self._login_step(
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signin_form, self._PASSWORD_URL, {'email': username},
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'Submitting email', self._SIGNIN_URL)
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# Step 3: submit password
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password_form = signin_page['body']
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self._login_step(
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password_form, self._USER_URL, {'email': username, 'password': password},
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'Submitting password', signin_url)
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class LyndaIE(LyndaBaseIE):
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IE_NAME = 'lynda'
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IE_DESC = 'lynda.com videos'
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_VALID_URL = r'https?://(?:www\.)?lynda\.com/(?:[^/]+/[^/]+/(?P<course_id>\d+)|player/embed)/(?P<id>\d+)'
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_TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]'
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_TESTS = [{
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'url': 'https://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
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# md5 is unstable
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'info_dict': {
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'id': '114408',
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'ext': 'mp4',
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'title': 'Using the exercise files',
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'duration': 68
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}
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}, {
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'url': 'https://www.lynda.com/player/embed/133770?tr=foo=1;bar=g;fizz=rt&fs=0',
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'only_matching': True,
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}]
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def _raise_unavailable(self, video_id):
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self.raise_login_required(
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'Video %s is only available for members' % video_id)
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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('course_id')
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query = {
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'videoId': video_id,
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'type': 'video',
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}
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video = self._download_json(
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'https://www.lynda.com/ajax/player', video_id,
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'Downloading video JSON', fatal=False, query=query)
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# Fallback scenario
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if not video:
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query['courseId'] = course_id
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play = self._download_json(
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'https://www.lynda.com/ajax/course/%s/%s/play'
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% (course_id, video_id), video_id, 'Downloading play JSON')
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if not play:
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self._raise_unavailable(video_id)
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formats = []
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for formats_dict in play:
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urls = formats_dict.get('urls')
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if not isinstance(urls, dict):
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continue
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cdn = formats_dict.get('name')
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for format_id, format_url in urls.items():
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if not format_url:
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continue
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formats.append({
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'url': format_url,
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'format_id': '%s-%s' % (cdn, format_id) if cdn else format_id,
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'height': int_or_none(format_id),
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})
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self._sort_formats(formats)
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conviva = self._download_json(
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'https://www.lynda.com/ajax/player/conviva', video_id,
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'Downloading conviva JSON', query=query)
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return {
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'id': video_id,
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'title': conviva['VideoTitle'],
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'description': conviva.get('VideoDescription'),
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'release_year': int_or_none(conviva.get('ReleaseYear')),
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'duration': int_or_none(conviva.get('Duration')),
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'creator': conviva.get('Author'),
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'formats': formats,
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}
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if 'Status' in video:
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raise ExtractorError(
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'lynda returned error: %s' % video['Message'], expected=True)
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if video.get('HasAccess') is False:
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self._raise_unavailable(video_id)
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video_id = compat_str(video.get('ID') or video_id)
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duration = int_or_none(video.get('DurationInSeconds'))
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title = video['Title']
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formats = []
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fmts = video.get('Formats')
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if fmts:
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formats.extend([{
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'url': f['Url'],
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'ext': f.get('Extension'),
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'width': int_or_none(f.get('Width')),
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'height': int_or_none(f.get('Height')),
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'filesize': int_or_none(f.get('FileSize')),
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'format_id': compat_str(f.get('Resolution')) if f.get('Resolution') else None,
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} for f in fmts if f.get('Url')])
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prioritized_streams = video.get('PrioritizedStreams')
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if prioritized_streams:
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for prioritized_stream_id, prioritized_stream in prioritized_streams.items():
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formats.extend([{
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'url': video_url,
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'height': int_or_none(format_id),
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'format_id': '%s-%s' % (prioritized_stream_id, format_id),
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} for format_id, video_url in prioritized_stream.items()])
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self._check_formats(formats, video_id)
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self._sort_formats(formats)
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subtitles = self.extract_subtitles(video_id)
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return {
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'id': video_id,
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'title': title,
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'duration': duration,
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'subtitles': subtitles,
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'formats': formats
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}
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def _fix_subtitles(self, subs):
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srt = ''
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seq_counter = 0
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for pos in range(0, len(subs) - 1):
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seq_current = subs[pos]
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m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
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if m_current is None:
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continue
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seq_next = subs[pos + 1]
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m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
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if m_next is None:
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continue
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appear_time = m_current.group('timecode')
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disappear_time = m_next.group('timecode')
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text = seq_current['Caption'].strip()
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if text:
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seq_counter += 1
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srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (seq_counter, appear_time, disappear_time, text)
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if srt:
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return srt
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def _get_subtitles(self, video_id):
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url = 'https://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
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subs = self._download_json(url, None, False)
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if subs:
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return {'en': [{'ext': 'srt', 'data': self._fix_subtitles(subs)}]}
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else:
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return {}
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class LyndaCourseIE(LyndaBaseIE):
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IE_NAME = 'lynda:course'
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IE_DESC = 'lynda.com online courses'
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# Course link equals to welcome/introduction video link of same course
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# We will recognize it as course link
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_VALID_URL = r'https?://(?:www|m)\.lynda\.com/(?P<coursepath>[^/]+/[^/]+/(?P<courseid>\d+))-\d\.html'
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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_path = mobj.group('coursepath')
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course_id = mobj.group('courseid')
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item_template = 'https://www.lynda.com/%s/%%s-4.html' % course_path
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course = self._download_json(
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'https://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
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course_id, 'Downloading course JSON', fatal=False)
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if not course:
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webpage = self._download_webpage(url, course_id)
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entries = [
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self.url_result(
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item_template % video_id, ie=LyndaIE.ie_key(),
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video_id=video_id)
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for video_id in re.findall(
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r'data-video-id=["\'](\d+)', webpage)]
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return self.playlist_result(
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entries, course_id,
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self._og_search_title(webpage, fatal=False),
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self._og_search_description(webpage))
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if course.get('Status') == 'NotFound':
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raise ExtractorError(
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'Course %s does not exist' % course_id, expected=True)
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unaccessible_videos = 0
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entries = []
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# Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
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# by single video API anymore
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for chapter in course['Chapters']:
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for video in chapter.get('Videos', []):
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if video.get('HasAccess') is False:
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unaccessible_videos += 1
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continue
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video_id = video.get('ID')
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if video_id:
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entries.append({
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'_type': 'url_transparent',
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'url': item_template % video_id,
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'ie_key': LyndaIE.ie_key(),
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'chapter': chapter.get('Title'),
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'chapter_number': int_or_none(chapter.get('ChapterIndex')),
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'chapter_id': compat_str(chapter.get('ID')),
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})
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if unaccessible_videos > 0:
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self._downloader.report_warning(
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'%s videos are only available for members (or paid members) and will not be downloaded. '
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% unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT)
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course_title = course.get('Title')
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course_description = course.get('Description')
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return self.playlist_result(entries, course_id, course_title, course_description)
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