add authentication-exception

gallery_dl/__init__.py

@@ -87,6 +87,12 @@ def main():
             else:
                 jobtype = job.DownloadJob
             for url in args.urls:
-                jobtype(url).run()
+                try:
+                    jobtype(url).run()
+                except exception.NoExtractorError:
+                    print("No suitable extractor found for URL '", url, "'", sep="")
+                except exception.AuthenticationError:
+                    print("Authentication failed. Please provide a valid "
+                          "username/password pair.")
     except KeyboardInterrupt:
         print("\nKeyboardInterrupt")

gallery_dl/exception.py

@@ -8,3 +8,6 @@
 
 class NoExtractorError(Exception):
     pass
+
+class AuthenticationError(Exception):
+    pass

gallery_dl/extractor/pixiv.py

@@ -9,7 +9,7 @@
 """Extract images and ugoira from http://www.pixiv.net/"""
 
 from .common import Extractor, Message
-from .. import config, text
+from .. import config, text, exception
 from ..cache import cache
 import re
 import json
@@ -213,8 +213,8 @@ class PixivAPI():
 
     def login(self):
         """Login and gain a Pixiv Public-API access token"""
-        self.user_id, token = self._do_login(self.username, self.password)
-        self.session.headers["Authorization"] = "Bearer " + token
+        self.user_id, auth_header = self._do_login(self.username, self.password)
+        self.session.headers["Authorization"] = auth_header
 
     @require_login
     def user(self, user_id):
@@ -280,15 +280,14 @@ class PixivAPI():
             "https://oauth.secure.pixiv.net/auth/token", data=data
         )
         if response.status_code not in (200, 301, 302):
-            raise Exception("login() failed! check username and password.\n"
-                            "HTTP %s: %s" % (response.status_code, response.text))
+            raise exception.AuthenticationError()
         try:
             response = self._parse(response)["response"]
             token = response["access_token"]
             user = response["user"]["id"]
         except:
             raise Exception("Get access_token error! Response: %s" % (token))
-        return user, token
+        return user, "Bearer " + token
 
     @staticmethod
     def _parse(response):