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[youtube-dl] / youtube_dl / extractor / lynda.py
1 from __future__ import unicode_literals
2
3 import re
4
5 from .common import InfoExtractor
6 from ..compat import (
7     compat_HTTPError,
8     compat_str,
9     compat_urlparse,
10 )
11 from ..utils import (
12     ExtractorError,
13     int_or_none,
14     urlencode_postdata,
15 )
16
17
18 class LyndaBaseIE(InfoExtractor):
19     _SIGNIN_URL = 'https://www.lynda.com/signin'
20     _PASSWORD_URL = 'https://www.lynda.com/signin/password'
21     _USER_URL = 'https://www.lynda.com/signin/user'
22     _ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'
23     _NETRC_MACHINE = 'lynda'
24
25     def _real_initialize(self):
26         self._login()
27
28     @staticmethod
29     def _check_error(json_string, key_or_keys):
30         keys = [key_or_keys] if isinstance(key_or_keys, compat_str) else key_or_keys
31         for key in keys:
32             error = json_string.get(key)
33             if error:
34                 raise ExtractorError('Unable to login: %s' % error, expected=True)
35
36     def _login_step(self, form_html, fallback_action_url, extra_form_data, note, referrer_url):
37         action_url = self._search_regex(
38             r'<form[^>]+action=(["\'])(?P<url>.+?)\1', form_html,
39             'post url', default=fallback_action_url, group='url')
40
41         if not action_url.startswith('http'):
42             action_url = compat_urlparse.urljoin(self._SIGNIN_URL, action_url)
43
44         form_data = self._hidden_inputs(form_html)
45         form_data.update(extra_form_data)
46
47         try:
48             response = self._download_json(
49                 action_url, None, note,
50                 data=urlencode_postdata(form_data),
51                 headers={
52                     'Referer': referrer_url,
53                     'X-Requested-With': 'XMLHttpRequest',
54                 })
55         except ExtractorError as e:
56             if isinstance(e.cause, compat_HTTPError) and e.cause.code == 500:
57                 response = self._parse_json(e.cause.read().decode('utf-8'), None)
58                 self._check_error(response, ('email', 'password'))
59             raise
60
61         self._check_error(response, 'ErrorMessage')
62
63         return response, action_url
64
65     def _login(self):
66         username, password = self._get_login_info()
67         if username is None:
68             return
69
70         # Step 1: download signin page
71         signin_page = self._download_webpage(
72             self._SIGNIN_URL, None, 'Downloading signin page')
73
74         # Already logged in
75         if any(re.search(p, signin_page) for p in (
76                 'isLoggedIn\s*:\s*true', r'logout\.aspx', r'>Log out<')):
77             return
78
79         # Step 2: submit email
80         signin_form = self._search_regex(
81             r'(?s)(<form[^>]+data-form-name=["\']signin["\'][^>]*>.+?</form>)',
82             signin_page, 'signin form')
83         signin_page, signin_url = self._login_step(
84             signin_form, self._PASSWORD_URL, {'email': username},
85             'Submitting email', self._SIGNIN_URL)
86
87         # Step 3: submit password
88         password_form = signin_page['body']
89         self._login_step(
90             password_form, self._USER_URL, {'email': username, 'password': password},
91             'Submitting password', signin_url)
92
93
94 class LyndaIE(LyndaBaseIE):
95     IE_NAME = 'lynda'
96     IE_DESC = 'lynda.com videos'
97     _VALID_URL = r'https?://www\.lynda\.com/(?:[^/]+/[^/]+/\d+|player/embed)/(?P<id>\d+)'
98
99     _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]'
100
101     _TESTS = [{
102         'url': 'http://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
103         # md5 is unstable
104         'info_dict': {
105             'id': '114408',
106             'ext': 'mp4',
107             'title': 'Using the exercise files',
108             'duration': 68
109         }
110     }, {
111         'url': 'https://www.lynda.com/player/embed/133770?tr=foo=1;bar=g;fizz=rt&fs=0',
112         'only_matching': True,
113     }]
114
115     def _real_extract(self, url):
116         video_id = self._match_id(url)
117
118         video = self._download_json(
119             'http://www.lynda.com/ajax/player?videoId=%s&type=video' % video_id,
120             video_id, 'Downloading video JSON')
121
122         if 'Status' in video:
123             raise ExtractorError(
124                 'lynda returned error: %s' % video['Message'], expected=True)
125
126         if video.get('HasAccess') is False:
127             self.raise_login_required('Video %s is only available for members' % video_id)
128
129         video_id = compat_str(video.get('ID') or video_id)
130         duration = int_or_none(video.get('DurationInSeconds'))
131         title = video['Title']
132
133         formats = []
134
135         fmts = video.get('Formats')
136         if fmts:
137             formats.extend([{
138                 'url': f['Url'],
139                 'ext': f.get('Extension'),
140                 'width': int_or_none(f.get('Width')),
141                 'height': int_or_none(f.get('Height')),
142                 'filesize': int_or_none(f.get('FileSize')),
143                 'format_id': compat_str(f.get('Resolution')) if f.get('Resolution') else None,
144             } for f in fmts if f.get('Url')])
145
146         prioritized_streams = video.get('PrioritizedStreams')
147         if prioritized_streams:
148             for prioritized_stream_id, prioritized_stream in prioritized_streams.items():
149                 formats.extend([{
150                     'url': video_url,
151                     'width': int_or_none(format_id),
152                     'format_id': '%s-%s' % (prioritized_stream_id, format_id),
153                 } for format_id, video_url in prioritized_stream.items()])
154
155         self._check_formats(formats, video_id)
156         self._sort_formats(formats)
157
158         subtitles = self.extract_subtitles(video_id)
159
160         return {
161             'id': video_id,
162             'title': title,
163             'duration': duration,
164             'subtitles': subtitles,
165             'formats': formats
166         }
167
168     def _fix_subtitles(self, subs):
169         srt = ''
170         seq_counter = 0
171         for pos in range(0, len(subs) - 1):
172             seq_current = subs[pos]
173             m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
174             if m_current is None:
175                 continue
176             seq_next = subs[pos + 1]
177             m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
178             if m_next is None:
179                 continue
180             appear_time = m_current.group('timecode')
181             disappear_time = m_next.group('timecode')
182             text = seq_current['Caption'].strip()
183             if text:
184                 seq_counter += 1
185                 srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (seq_counter, appear_time, disappear_time, text)
186         if srt:
187             return srt
188
189     def _get_subtitles(self, video_id):
190         url = 'http://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
191         subs = self._download_json(url, None, False)
192         if subs:
193             return {'en': [{'ext': 'srt', 'data': self._fix_subtitles(subs)}]}
194         else:
195             return {}
196
197
198 class LyndaCourseIE(LyndaBaseIE):
199     IE_NAME = 'lynda:course'
200     IE_DESC = 'lynda.com online courses'
201
202     # Course link equals to welcome/introduction video link of same course
203     # We will recognize it as course link
204     _VALID_URL = r'https?://(?:www|m)\.lynda\.com/(?P<coursepath>[^/]+/[^/]+/(?P<courseid>\d+))-\d\.html'
205
206     def _real_extract(self, url):
207         mobj = re.match(self._VALID_URL, url)
208         course_path = mobj.group('coursepath')
209         course_id = mobj.group('courseid')
210
211         course = self._download_json(
212             'http://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
213             course_id, 'Downloading course JSON')
214
215         if course.get('Status') == 'NotFound':
216             raise ExtractorError(
217                 'Course %s does not exist' % course_id, expected=True)
218
219         unaccessible_videos = 0
220         entries = []
221
222         # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
223         # by single video API anymore
224
225         for chapter in course['Chapters']:
226             for video in chapter.get('Videos', []):
227                 if video.get('HasAccess') is False:
228                     unaccessible_videos += 1
229                     continue
230                 video_id = video.get('ID')
231                 if video_id:
232                     entries.append({
233                         '_type': 'url_transparent',
234                         'url': 'http://www.lynda.com/%s/%s-4.html' % (course_path, video_id),
235                         'ie_key': LyndaIE.ie_key(),
236                         'chapter': chapter.get('Title'),
237                         'chapter_number': int_or_none(chapter.get('ChapterIndex')),
238                         'chapter_id': compat_str(chapter.get('ID')),
239                     })
240
241         if unaccessible_videos > 0:
242             self._downloader.report_warning(
243                 '%s videos are only available for members (or paid members) and will not be downloaded. '
244                 % unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT)
245
246         course_title = course.get('Title')
247         course_description = course.get('Description')
248
249         return self.playlist_result(entries, course_id, course_title, course_description)