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1 from __future__ import unicode_literals
2
3 import re
4 import json
5
6 from .common import InfoExtractor
7 from ..compat import (
8     compat_str,
9     compat_urllib_parse,
10     compat_urllib_request,
11 )
12 from ..utils import (
13     ExtractorError,
14     int_or_none,
15 )
16
17
18 class LyndaBaseIE(InfoExtractor):
19     _LOGIN_URL = 'https://www.lynda.com/login/login.aspx'
20     _SUCCESSFUL_LOGIN_REGEX = r'isLoggedIn: true'
21     _ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'
22     _NETRC_MACHINE = 'lynda'
23
24     def _real_initialize(self):
25         self._login()
26
27     def _login(self):
28         (username, password) = self._get_login_info()
29         if username is None:
30             return
31
32         login_form = {
33             'username': username,
34             'password': password,
35             'remember': 'false',
36             'stayPut': 'false'
37         }
38         request = compat_urllib_request.Request(
39             self._LOGIN_URL, compat_urllib_parse.urlencode(login_form))
40         login_page = self._download_webpage(
41             request, None, 'Logging in as %s' % username)
42
43         # Not (yet) logged in
44         m = re.search(r'loginResultJson = \'(?P<json>[^\']+)\';', login_page)
45         if m is not None:
46             response = m.group('json')
47             response_json = json.loads(response)
48             state = response_json['state']
49
50             if state == 'notlogged':
51                 raise ExtractorError(
52                     'Unable to login, incorrect username and/or password',
53                     expected=True)
54
55             # This is when we get popup:
56             # > You're already logged in to lynda.com on two devices.
57             # > If you log in here, we'll log you out of another device.
58             # So, we need to confirm this.
59             if state == 'conflicted':
60                 confirm_form = {
61                     'username': '',
62                     'password': '',
63                     'resolve': 'true',
64                     'remember': 'false',
65                     'stayPut': 'false',
66                 }
67                 request = compat_urllib_request.Request(
68                     self._LOGIN_URL, compat_urllib_parse.urlencode(confirm_form))
69                 login_page = self._download_webpage(
70                     request, None,
71                     'Confirming log in and log out from another device')
72
73         if re.search(self._SUCCESSFUL_LOGIN_REGEX, login_page) is None:
74             raise ExtractorError('Unable to log in')
75
76
77 class LyndaIE(LyndaBaseIE):
78     IE_NAME = 'lynda'
79     IE_DESC = 'lynda.com videos'
80     _VALID_URL = r'https?://www\.lynda\.com/(?:[^/]+/[^/]+/\d+|player/embed)/(?P<id>\d+)'
81     _NETRC_MACHINE = 'lynda'
82
83     _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]'
84
85     _TESTS = [{
86         'url': 'http://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
87         'md5': 'ecfc6862da89489161fb9cd5f5a6fac1',
88         'info_dict': {
89             'id': '114408',
90             'ext': 'mp4',
91             'title': 'Using the exercise files',
92             'duration': 68
93         }
94     }, {
95         'url': 'https://www.lynda.com/player/embed/133770?tr=foo=1;bar=g;fizz=rt&fs=0',
96         'only_matching': True,
97     }]
98
99     def _real_extract(self, url):
100         video_id = self._match_id(url)
101
102         page = self._download_webpage(
103             'http://www.lynda.com/ajax/player?videoId=%s&type=video' % video_id,
104             video_id, 'Downloading video JSON')
105         video_json = json.loads(page)
106
107         if 'Status' in video_json:
108             raise ExtractorError(
109                 'lynda returned error: %s' % video_json['Message'], expected=True)
110
111         if video_json['HasAccess'] is False:
112             raise ExtractorError(
113                 'Video %s is only available for members. '
114                 % video_id + self._ACCOUNT_CREDENTIALS_HINT, expected=True)
115
116         video_id = compat_str(video_json['ID'])
117         duration = video_json['DurationInSeconds']
118         title = video_json['Title']
119
120         formats = []
121
122         fmts = video_json.get('Formats')
123         if fmts:
124             formats.extend([
125                 {
126                     'url': fmt['Url'],
127                     'ext': fmt['Extension'],
128                     'width': fmt['Width'],
129                     'height': fmt['Height'],
130                     'filesize': fmt['FileSize'],
131                     'format_id': str(fmt['Resolution'])
132                 } for fmt in fmts])
133
134         prioritized_streams = video_json.get('PrioritizedStreams')
135         if prioritized_streams:
136             formats.extend([
137                 {
138                     'url': video_url,
139                     'width': int_or_none(format_id),
140                     'format_id': format_id,
141                 } for format_id, video_url in prioritized_streams['0'].items()
142             ])
143
144         self._check_formats(formats, video_id)
145         self._sort_formats(formats)
146
147         subtitles = self.extract_subtitles(video_id, page)
148
149         return {
150             'id': video_id,
151             'title': title,
152             'duration': duration,
153             'subtitles': subtitles,
154             'formats': formats
155         }
156
157     def _fix_subtitles(self, subs):
158         srt = ''
159         seq_counter = 0
160         for pos in range(0, len(subs) - 1):
161             seq_current = subs[pos]
162             m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
163             if m_current is None:
164                 continue
165             seq_next = subs[pos + 1]
166             m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
167             if m_next is None:
168                 continue
169             appear_time = m_current.group('timecode')
170             disappear_time = m_next.group('timecode')
171             text = seq_current['Caption'].strip()
172             if text:
173                 seq_counter += 1
174                 srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (seq_counter, appear_time, disappear_time, text)
175         if srt:
176             return srt
177
178     def _get_subtitles(self, video_id, webpage):
179         url = 'http://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
180         subs = self._download_json(url, None, False)
181         if subs:
182             return {'en': [{'ext': 'srt', 'data': self._fix_subtitles(subs)}]}
183         else:
184             return {}
185
186
187 class LyndaCourseIE(LyndaBaseIE):
188     IE_NAME = 'lynda:course'
189     IE_DESC = 'lynda.com online courses'
190
191     # Course link equals to welcome/introduction video link of same course
192     # We will recognize it as course link
193     _VALID_URL = r'https?://(?:www|m)\.lynda\.com/(?P<coursepath>[^/]+/[^/]+/(?P<courseid>\d+))-\d\.html'
194
195     def _real_extract(self, url):
196         mobj = re.match(self._VALID_URL, url)
197         course_path = mobj.group('coursepath')
198         course_id = mobj.group('courseid')
199
200         page = self._download_webpage(
201             'http://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
202             course_id, 'Downloading course JSON')
203         course_json = json.loads(page)
204
205         if 'Status' in course_json and course_json['Status'] == 'NotFound':
206             raise ExtractorError(
207                 'Course %s does not exist' % course_id, expected=True)
208
209         unaccessible_videos = 0
210         videos = []
211
212         # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
213         # by single video API anymore
214
215         for chapter in course_json['Chapters']:
216             for video in chapter['Videos']:
217                 if video['HasAccess'] is False:
218                     unaccessible_videos += 1
219                     continue
220                 videos.append(video['ID'])
221
222         if unaccessible_videos > 0:
223             self._downloader.report_warning(
224                 '%s videos are only available for members (or paid members) and will not be downloaded. '
225                 % unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT)
226
227         entries = [
228             self.url_result(
229                 'http://www.lynda.com/%s/%s-4.html' % (course_path, video_id),
230                 'Lynda')
231             for video_id in videos]
232
233         course_title = course_json['Title']
234
235         return self.playlist_result(entries, course_id, course_title)