自定义“找不到与请求uri匹配的http资源”消息

Question

是否有一种简单的方法来修改Web API返回的默认404消息？

找不到与请求uri匹配的http资源

Answer 1

您需要覆盖DelegatingHandler抽象类。

在此处查看更多内容来自ASP.Net Web API 2的统一，一致的错误响应

在这里， ASP.NET Web API异常处理

Answer 2

这样做的简单方法是“DelegatingHandler”

1. 第一步是创建一个继承自DelegatingHandler的新类：

     public class ApiGatewayHandler : DelegatingHandler { protected async override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) { var response = await base.SendAsync(request, cancellationToken); if (response!=null && response.StatusCode == HttpStatusCode.NotFound) { var msg = await response.Content.ReadAsStringAsync(); //you can change the response here if (msg != null && msg.Contains("No HTTP resource was found")) { return new HttpResponseMessage { StatusCode = HttpStatusCode.NotFound, Content = new ObjectContent(typeof(object), new { Message = "New Message..No HTTP resource was found that matches the request URI" }, new JsonMediaTypeFormatter()) }; } } return response; return response; } 

   }

2. 然后在web api注册配置文件中注册此类

    public static void Register(HttpConfiguration config){ public static void Register(HttpConfiguration config) { // you config and routes here config.MessageHandlers.Add(new ApiGatewayHandler()); //.... } } 

这就对了。 如果您需要更改任何其他错误消息，也是如此。