ASP.NET Core 等效于 ASP.NET MVC 5 的 HttpException

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在 ASP.NET MVC 5 中，您可以抛出 HttpException 带有 HTTP 代码，这将设置响应如下:

In ASP.NET MVC 5 you could throw a HttpException with a HTTP code and this would set the response like so:

throw new HttpException((int)HttpStatusCode.BadRequest, "Bad Request.");

HttpException 在 ASP.NET Core 中不存在.什么是等效代码?

HttpException does not exist in ASP.NET Core. What is the equivalent code?

推荐答案

我实现了自己的 HttpException 并支持中间件，它可以捕获所有 HttpException 并将它们转换为相应的错误响应.下面可以看到一个简短的摘录.您还可以使用 Boxed.AspNetCore Nuget 包.

I implemented my own HttpException and supporting middleware which catches all HttpException's and turns them into the corresponding error response. A short extract can be seen below. You can also use the Boxed.AspNetCore Nuget package.

public void Configure(IApplicationBuilder application) { application.UseIISPlatformHandler(); application.UseStatusCodePagesWithReExecute("/error/{0}"); application.UseHttpException(); application.UseMvc(); }

扩展方法

public static class ApplicationBuilderExtensions { public static IApplicationBuilder UseHttpException(this IApplicationBuilder application) { return application.UseMiddleware<HttpExceptionMiddleware>(); } }

中间件

internal class HttpExceptionMiddleware { private readonly RequestDelegate next; public HttpExceptionMiddleware(RequestDelegate next) { this.next = next; } public async Task Invoke(HttpContext context) { try { await this.next.Invoke(context); } catch (HttpException httpException) { context.Response.StatusCode = httpException.StatusCode; var responseFeature = context.Features.Get<IHttpResponseFeature>(); responseFeature.ReasonPhrase = httpException.Message; } } }

HttpException

public class HttpException : Exception { private readonly int httpStatusCode; public HttpException(int httpStatusCode) { this.httpStatusCode = httpStatusCode; } public HttpException(HttpStatusCode httpStatusCode) { this.httpStatusCode = (int)httpStatusCode; } public HttpException(int httpStatusCode, string message) : base(message) { this.httpStatusCode = httpStatusCode; } public HttpException(HttpStatusCode httpStatusCode, string message) : base(message) { this.httpStatusCode = (int)httpStatusCode; } public HttpException(int httpStatusCode, string message, Exception inner) : base(message, inner) { this.httpStatusCode = httpStatusCode; } public HttpException(HttpStatusCode httpStatusCode, string message, Exception inner) : base(message, inner) { this.httpStatusCode = (int)httpStatusCode; } public int StatusCode { get { return this.httpStatusCode; } } }

从长远来看，我建议不要使用异常来返回错误.异常比仅从方法返回错误要慢.

In the long term, I would advise against using exceptions for returning errors. Exceptions are slower than just returning an error from a method.