Update app.py

app.py

@@ -365,16 +365,17 @@ def get_all_models(api_key, sub_type):
         )
         return []
 
-def determine_request_type(model_name, model_list, free_model_list):
-    """
-    根据用户请求的模型判断请求类型。
-    """
-    if model_name in free_model_list:
-        return "free"
-    elif model_name in model_list:
-        return "paid"
+def determine_request_type(model_name, text_models, free_text_models, image_models, free_image_models):
+    if model_name in text_models:
+        return "text"
+    elif model_name in free_text_models:
+        return "free_text"
+    elif model_name in image_models:
+      return "image"
+    elif model_name in free_image_models:
+        return "free_image"
     else:
-        return "unknown"
+        return None
 
 def select_key(request_type, model_name):
     """