aboutsummaryrefslogtreecommitdiff
path: root/youtube_dl/extractor/lynda.py
blob: 8bb21ee1d710d8ecd2b942e29a64fc57d07fde76 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
from __future__ import unicode_literals

import re
import json

from .common import InfoExtractor
from ..compat import (
    compat_str,
    compat_urllib_parse,
    compat_urllib_request,
)
from ..utils import (
    ExtractorError,
    int_or_none,
)


class LyndaIE(InfoExtractor):
    IE_NAME = 'lynda'
    IE_DESC = 'lynda.com videos'
    _VALID_URL = r'https?://www\.lynda\.com/[^/]+/[^/]+/\d+/(\d+)-\d\.html'
    _LOGIN_URL = 'https://www.lynda.com/login/login.aspx'
    _NETRC_MACHINE = 'lynda'

    _SUCCESSFUL_LOGIN_REGEX = r'isLoggedIn: true'
    _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]'

    ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'

    _TEST = {
        'url': 'http://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
        'md5': 'ecfc6862da89489161fb9cd5f5a6fac1',
        'info_dict': {
            'id': '114408',
            'ext': 'mp4',
            'title': 'Using the exercise files',
            'duration': 68
        }
    }

    def _real_initialize(self):
        self._login()

    def _real_extract(self, url):
        mobj = re.match(self._VALID_URL, url)
        video_id = mobj.group(1)

        page = self._download_webpage('http://www.lynda.com/ajax/player?videoId=%s&type=video' % video_id, video_id,
                                      'Downloading video JSON')
        video_json = json.loads(page)

        if 'Status' in video_json:
            raise ExtractorError('lynda returned error: %s' % video_json['Message'], expected=True)

        if video_json['HasAccess'] is False:
            raise ExtractorError(
                'Video %s is only available for members. ' % video_id + self.ACCOUNT_CREDENTIALS_HINT, expected=True)

        video_id = compat_str(video_json['ID'])
        duration = video_json['DurationInSeconds']
        title = video_json['Title']

        formats = []

        fmts = video_json.get('Formats')
        if fmts:
            formats.extend([
                {
                    'url': fmt['Url'],
                    'ext': fmt['Extension'],
                    'width': fmt['Width'],
                    'height': fmt['Height'],
                    'filesize': fmt['FileSize'],
                    'format_id': str(fmt['Resolution'])
                } for fmt in fmts])

        prioritized_streams = video_json.get('PrioritizedStreams')
        if prioritized_streams:
            formats.extend([
                {
                    'url': video_url,
                    'width': int_or_none(format_id),
                    'format_id': format_id,
                } for format_id, video_url in prioritized_streams['0'].items()
            ])

        self._check_formats(formats, video_id)
        self._sort_formats(formats)

        subtitles = self.extract_subtitles(video_id, page)

        return {
            'id': video_id,
            'title': title,
            'duration': duration,
            'subtitles': subtitles,
            'formats': formats
        }

    def _login(self):
        (username, password) = self._get_login_info()
        if username is None:
            return

        login_form = {
            'username': username,
            'password': password,
            'remember': 'false',
            'stayPut': 'false'
        }
        request = compat_urllib_request.Request(self._LOGIN_URL, compat_urllib_parse.urlencode(login_form))
        login_page = self._download_webpage(request, None, 'Logging in as %s' % username)

        # Not (yet) logged in
        m = re.search(r'loginResultJson = \'(?P<json>[^\']+)\';', login_page)
        if m is not None:
            response = m.group('json')
            response_json = json.loads(response)
            state = response_json['state']

            if state == 'notlogged':
                raise ExtractorError('Unable to login, incorrect username and/or password', expected=True)

            # This is when we get popup:
            # > You're already logged in to lynda.com on two devices.
            # > If you log in here, we'll log you out of another device.
            # So, we need to confirm this.
            if state == 'conflicted':
                confirm_form = {
                    'username': '',
                    'password': '',
                    'resolve': 'true',
                    'remember': 'false',
                    'stayPut': 'false',
                }
                request = compat_urllib_request.Request(self._LOGIN_URL, compat_urllib_parse.urlencode(confirm_form))
                login_page = self._download_webpage(request, None, 'Confirming log in and log out from another device')

        if re.search(self._SUCCESSFUL_LOGIN_REGEX, login_page) is None:
            raise ExtractorError('Unable to log in')

    def _fix_subtitles(self, subs):
        srt = ''
        for pos in range(0, len(subs) - 1):
            seq_current = subs[pos]
            m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
            if m_current is None:
                continue
            seq_next = subs[pos + 1]
            m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
            if m_next is None:
                continue
            appear_time = m_current.group('timecode')
            disappear_time = m_next.group('timecode')
            text = seq_current['Caption'].strip()
            srt += '%s\r\n%s --> %s\r\n%s' % (str(pos), appear_time, disappear_time, text)
        if srt:
            return srt

    def _get_subtitles(self, video_id, webpage):
        url = 'http://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
        subs = self._download_json(url, None, False)
        if subs:
            return {'en': [{'ext': 'srt', 'data': self._fix_subtitles(subs)}]}
        else:
            return {}


class LyndaCourseIE(InfoExtractor):
    IE_NAME = 'lynda:course'
    IE_DESC = 'lynda.com online courses'

    # Course link equals to welcome/introduction video link of same course
    # We will recognize it as course link
    _VALID_URL = r'https?://(?:www|m)\.lynda\.com/(?P<coursepath>[^/]+/[^/]+/(?P<courseid>\d+))-\d\.html'

    def _real_extract(self, url):
        mobj = re.match(self._VALID_URL, url)
        course_path = mobj.group('coursepath')
        course_id = mobj.group('courseid')

        page = self._download_webpage('http://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
                                      course_id, 'Downloading course JSON')
        course_json = json.loads(page)

        if 'Status' in course_json and course_json['Status'] == 'NotFound':
            raise ExtractorError('Course %s does not exist' % course_id, expected=True)

        unaccessible_videos = 0
        videos = []
        (username, _) = self._get_login_info()

        # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
        # by single video API anymore

        for chapter in course_json['Chapters']:
            for video in chapter['Videos']:
                if username is None and video['HasAccess'] is False:
                    unaccessible_videos += 1
                    continue
                videos.append(video['ID'])

        if unaccessible_videos > 0:
            self._downloader.report_warning('%s videos are only available for members and will not be downloaded. '
                                            % unaccessible_videos + LyndaIE.ACCOUNT_CREDENTIALS_HINT)

        entries = [
            self.url_result('http://www.lynda.com/%s/%s-4.html' %
                            (course_path, video_id),
                            'Lynda')
            for video_id in videos]

        course_title = course_json['Title']

        return self.playlist_result(entries, course_id, course_title)