[toutv] detect invalid login error

youtube_dl/extractor/toutv.py

@@ -4,7 +4,9 @@ from __future__ import unicode_literals
 import json
 
 from .radiocanada import RadioCanadaIE
+from ..compat import compat_HTTPError
 from ..utils import (
+    ExtractorError,
     int_or_none,
     merge_dicts,
 )
@@ -42,6 +44,7 @@ class TouTvIE(RadioCanadaIE):
         email, password = self._get_login_info()
         if email is None:
             return
+        try:
             self._access_token = self._download_json(
                 'https://services.radio-canada.ca/toutv/profiling/accounts/login',
                 None, 'Logging in', data=json.dumps({
@@ -54,6 +57,11 @@ class TouTvIE(RadioCanadaIE):
                     'Authorization': 'client-key ' + self._CLIENT_KEY,
                     'Content-Type': 'application/json;charset=utf-8',
                 })['access_token']
+        except ExtractorError as e:
+            if isinstance(e.cause, compat_HTTPError) and e.cause.code == 401:
+                error = self._parse_json(e.cause.read().decode(), None)['Message']
+                raise ExtractorError(error, expected=True)
+            raise
         self._claims = self._call_api('validation/v2/getClaims')['claims']
 
     def _real_extract(self, url):