refactor: Improves user authentication logic

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/extensions/ext_login.py

@@ -3,7 +3,7 @@ import json
 import flask_login  # type: ignore
 from flask import Response, request
 from flask_login import user_loaded_from_request, user_logged_in
-from werkzeug.exceptions import Unauthorized
+from werkzeug.exceptions import NotFound, Unauthorized
 
 import contexts
 from dify_app import DifyApp
@@ -21,26 +21,32 @@ login_manager = flask_login.LoginManager()
 def load_user_from_request(request_from_flask_login):
     """Load user based on the request."""
     auth_header = request.headers.get("Authorization", "")
-    if not auth_header:
+    if auth_header:
-        auth_token = request.args.get("_token")
-        if not auth_token:
-            raise Unauthorized("Invalid Authorization token.")
-    else:
         if " " not in auth_header:
             raise Unauthorized("Invalid Authorization header format. Expected 'Bearer <api-key>' format.")
-        auth_scheme, auth_token = auth_header.split(None, 1)
+        auth_scheme, auth_token = auth_header.split(maxsplit=1)
         auth_scheme = auth_scheme.lower()
         if auth_scheme != "bearer":
             raise Unauthorized("Invalid Authorization header format. Expected 'Bearer <api-key>' format.")
+    else:
+        auth_token = request.args.get("_token")
 
-    decoded = PassportService().verify(auth_token)
     if request.blueprint in {"console", "inner_api"}:
+        if not auth_token:
+            raise Unauthorized("Invalid Authorization token.")
+        decoded = PassportService().verify(auth_token)
         user_id = decoded.get("user_id")
 
         logged_in_account = AccountService.load_logged_in_account(account_id=user_id)
         return logged_in_account
-    else:
+    elif request.blueprint == "web":
+        decoded = PassportService().verify(auth_token)
+        end_user_id = decoded.get("end_user_id")
+        if not end_user_id:
+            raise Unauthorized("Invalid Authorization token.")
         end_user = db.session.query(EndUser).filter(EndUser.id == decoded["end_user_id"]).first()
+        if not end_user:
+            raise NotFound("End user not found.")
         return end_user