[lynda] Completely skip videos we don't have access to, extract base class and modernize (Closes #5093)

youtube_dl/extractor/lynda.py

@@ -15,18 +15,72 @@ from ..utils import (
 )
 
 
-class LyndaIE(InfoExtractor):
+class LyndaBaseIE(InfoExtractor):
+    _LOGIN_URL = 'https://www.lynda.com/login/login.aspx'
+    _SUCCESSFUL_LOGIN_REGEX = r'isLoggedIn: true'
+    _ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'
+
+    def _real_initialize(self):
+        self._login()
+
+    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')
+
+
+class LyndaIE(LyndaBaseIE):
     IE_NAME = 'lynda'
     IE_DESC = 'lynda.com videos'
-    _VALID_URL = r'https?://www\.lynda\.com/(?:[^/]+/[^/]+/\d+|player/embed)/(\d+)'
-    _LOGIN_URL = 'https://www.lynda.com/login/login.aspx'
+    _VALID_URL = r'https?://www\.lynda\.com/(?:[^/]+/[^/]+/\d+|player/embed)/(?P<id>\d+)'
     _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.'
-
     _TESTS = [{
         'url': 'http://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
         'md5': 'ecfc6862da89489161fb9cd5f5a6fac1',
@@ -41,23 +95,22 @@ class LyndaIE(InfoExtractor):
         'only_matching': True,
     }]
 
-    def _real_initialize(self):
-        self._login()
-
     def _real_extract(self, url):
-        mobj = re.match(self._VALID_URL, url)
-        video_id = mobj.group(1)
+        video_id = self._match_id(url)
 
-        page = self._download_webpage('http://www.lynda.com/ajax/player?videoId=%s&type=video' % video_id, video_id,
-                                      'Downloading video JSON')
+        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)
+            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 %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']
@@ -100,48 +153,6 @@ class LyndaIE(InfoExtractor):
             '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 = ''
         seq_counter = 0
@@ -172,7 +183,7 @@ class LyndaIE(InfoExtractor):
             return {}
 
 
-class LyndaCourseIE(InfoExtractor):
+class LyndaCourseIE(LyndaBaseIE):
     IE_NAME = 'lynda:course'
     IE_DESC = 'lynda.com online courses'
 
@@ -185,35 +196,37 @@ class LyndaCourseIE(InfoExtractor):
         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')
+        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)
+            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:
+                if 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)
+            self._downloader.report_warning(
+                '%s videos are only available for members (or paid members) and will not be downloaded. '
+                % unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT)
 
         entries = [
-            self.url_result('http://www.lynda.com/%s/%s-4.html' %
-                            (course_path, video_id),
-                            'Lynda')
+            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']