Round 5 fixes: workerpool resize shrink, validator lazy session close, plugin config error handling, 422 message detail, tests

app/api/errors.py

@@ -23,12 +23,14 @@ async def http_exception_handler(request: Request, exc: StarletteHTTPException):
 
 async def pydantic_validation_handler(request: Request, exc: ValidationError):
     logger.error(f"Validation error: {exc}")
+    errors = exc.errors()
+    message = errors[0].get("msg", "参数验证失败") if errors else "参数验证失败"
     return JSONResponse(
         status_code=422,
         content={
             "code": 422,
-            "message": "参数验证失败",
-            "data": exc.errors(),
+            "message": message,
+            "data": errors,
         },
     )
 

app/api/routes/plugins.py

@@ -54,9 +54,7 @@ async def update_plugin_config(
     request: ConfigRequest,
     service: PluginService = Depends(get_plugin_service),
 ):
-    success = await service.update_plugin_config(plugin_id, request.config)
-    if not success:
-        raise PluginNotFoundException(plugin_id)
+    await service.update_plugin_config(plugin_id, request.config)
     return success_response("保存插件配置成功", {"plugin_id": plugin_id, "config": request.config})
 
 

app/api/routes/settings.py

@@ -52,9 +52,14 @@ async def save_settings(
         validator._init_max_concurrency = request.default_concurrency
         if request.validation_targets is not None:
             validator.update_test_urls(request.validation_targets)
-        # 先关闭现有 session，再重置 semaphore，避免竞态窗口
-        await validator.close()
+        # 延迟关闭旧 session：让正在验证的代理继续使用旧 session，
+        # 新请求会通过 _ensure_session() 自动创建使用新配置的 session
+        old_session = validator._http_session
+        validator._http_session = None
+        validator._http_connector = None
         validator._semaphore = None
+        if old_session and not old_session.closed:
+            asyncio.create_task(old_session.close())
         logger.info(f"Validator config updated: timeout={request.validation_timeout}, concurrency={request.default_concurrency}, targets={request.validation_targets}")
 
     return success_response("保存设置成功", request.model_dump())