[bbc] Add support for authentication

youtube_dl/extractor/bbc.py

@@ -6,14 +6,18 @@ import itertools
 
 from .common import InfoExtractor
 from ..utils import (
+    clean_html,
     dict_get,
     ExtractorError,
     float_or_none,
+    get_element_by_class,
     int_or_none,
     parse_duration,
     parse_iso8601,
     try_get,
     unescapeHTML,
+    urlencode_postdata,
+    urljoin,
 )
 from ..compat import (
     compat_etree_fromstring,
@@ -38,6 +42,9 @@ class BBCCoUkIE(InfoExtractor):
                         (?P<id>%s)(?!/(?:episodes|broadcasts|clips))
                     ''' % _ID_REGEX
 
+    _LOGIN_URL = 'https://account.bbc.com/signin'
+    _NETRC_MACHINE = 'bbc'
+
     _MEDIASELECTOR_URLS = [
         # Provides HQ HLS streams with even better quality that pc mediaset but fails
         # with geolocation in some cases when it's even not geo restricted at all (e.g.
@@ -227,6 +234,39 @@ class BBCCoUkIE(InfoExtractor):
 
     _USP_RE = r'/([^/]+?)\.ism(?:\.hlsv2\.ism)?/[^/]+\.m3u8'
 
+    def _login(self):
+        username, password = self._get_login_info()
+        if username is None:
+            return
+
+        login_page = self._download_webpage(
+            self._LOGIN_URL, None, 'Downloading signin page')
+
+        login_form = self._hidden_inputs(login_page)
+
+        login_form.update({
+            'username': username,
+            'password': password,
+        })
+
+        post_url = urljoin(self._LOGIN_URL, self._search_regex(
+            r'<form[^>]+action=(["\'])(?P<url>.+?)\1', login_page,
+            'post url', default=self._LOGIN_URL, group='url'))
+
+        response, urlh = self._download_webpage_handle(
+            post_url, None, 'Logging in', data=urlencode_postdata(login_form),
+            headers={'Referer': self._LOGIN_URL})
+
+        if self._LOGIN_URL in urlh.geturl():
+            error = clean_html(get_element_by_class('form-message', response))
+            if error:
+                raise ExtractorError(
+                    'Unable to login: %s' % error, expected=True)
+            raise ExtractorError('Unable to log in')
+
+    def _real_initialize(self):
+        self._login()
+
     class MediaSelectionError(Exception):
         def __init__(self, id):
             self.id = id