Update app.py

app.py

@@ -325,39 +325,16 @@ def generate_upscale_via_hf(image_path):
 
 def master_upscale(input_base64):
     """
-    超分调度器 (接收 Base64 字符串)
+    超分调度器 (暂时停用)
+    由于目前缺乏稳定的免费算力，暂时直接返回提示。
     """
-    if not input_base64: return None
+    # 接收到请求后，仅仅打印日志
+    if input_base64:
+        print(f"--- [UPSCALE] Request received (Len: {len(input_base64)}), but feature is disabled. ---", flush=True)
     
-    print(f"--- Starting Upscale (Base64 length: {len(input_base64)}) ---", flush=True)
-    
-    tmp_path = None
-    try:
-        # 1. 解码 Base64 -> Bytes -> Temp File
-        image_data = base64.b64decode(input_base64)
-        
-        with tempfile.NamedTemporaryFile(suffix=".png", delete=False) as tmp_file:
-            tmp_file.write(image_data)
-            tmp_path = tmp_file.name
-        
-        print(f"Saved temp file: {tmp_path}", flush=True)
-
-        # 2. 调用 Segmind
-        img = generate_upscale_via_segmind(tmp_path)
-        if img: return img
-        
-        # 3. 调用 HF Space (Primary + Backup)
-        img = generate_upscale_via_hf(tmp_path)
-        if img: return img
-            
-    except Exception as e:
-        print(f"Upscale logic error: {e}", flush=True)
-    finally:
-        if tmp_path and os.path.exists(tmp_path):
-            os.remove(tmp_path)
-            print("Cleaned up temp file", flush=True)
-
-    raise gr.Error("Upscaling failed on all routes.")
+    # 直接抛出 Gradio 错误
+    # 这会在前端界面弹出一个红色的 Toast 提示框，显示下面的文字
+    raise gr.Error("抱歉，当前暂无稳定的免费高清放大资源可用 (No Resources Available)")
 
 # --- 5. 核心调度 ---