ASP.NET MVC 5의 HttpException에 해당하는 ASP.NET Core

ASP.NET MVC 5의 HttpException에 해당하는 ASP.NET Core

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ASP.NET MVC 5에서는 HTTP 코드 로 HttpException 을 던질 수 있으며 다음과 같이 응답을 설정합니다.

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

HttpExceptionASP.NET Core에는 없습니다. 동등한 코드는 무엇입니까?

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나는 HttpException모든 것을 잡아서 HttpException해당 오류 응답으로 바꾸는 내 자신의 미들웨어를 구현 했습니다. 짧은 추출은 아래에서 볼 수 있습니다. Boxed.AspNetCore Nuget 패키지를 사용할 수도 있습니다 .

Startup.cs의 사용 예

public void Configure(IApplicationBuilder application)
{
    application.UseIISPlatformHandler();

    application.UseStatusCodePagesWithReExecute("/error/{0}");
    application.UseHttpException();

    application.UseMvc();
}

연장 방법

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

미들웨어

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; } }
}

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후 @davidfowl와 간단한 채팅 , ASP.NET 5의 그러한 개념이없는 것 같습니다 HttpException또는 HttpResponseException"마술"응답 메시지에 설정하는 것이 있습니다.

What you can do, is hook into the ASP.NET 5 pipeline via MiddleWare, and create one that handles the exceptions for you.

Here is an example from the source code of their error handler middleware which will set the response status code to 500 in case of an exception further up the pipeline:

public class ErrorHandlerMiddleware
{
    private readonly RequestDelegate _next;
    private readonly ErrorHandlerOptions _options;
    private readonly ILogger _logger;

    public ErrorHandlerMiddleware(RequestDelegate next, 
                                  ILoggerFactory loggerFactory,
                                  ErrorHandlerOptions options)
    {
        _next = next;
        _options = options;
        _logger = loggerFactory.CreateLogger<ErrorHandlerMiddleware>();
        if (_options.ErrorHandler == null)
        {
            _options.ErrorHandler = _next;
        }
    }

    public async Task Invoke(HttpContext context)
    {
        try
        {
            await _next(context);
        }
        catch (Exception ex)
        {
            _logger.LogError("An unhandled exception has occurred: " + ex.Message, ex);

            if (context.Response.HasStarted)
            {
                _logger.LogWarning("The response has already started, 
                                    the error handler will not be executed.");
                throw;
            }

            PathString originalPath = context.Request.Path;
            if (_options.ErrorHandlingPath.HasValue)
            {
                context.Request.Path = _options.ErrorHandlingPath;
            }
            try
            {
                var errorHandlerFeature = new ErrorHandlerFeature()
                {
                    Error = ex,
                };
                context.SetFeature<IErrorHandlerFeature>(errorHandlerFeature);
                context.Response.StatusCode = 500;
                context.Response.Headers.Clear();

                await _options.ErrorHandler(context);
                return;
            }
            catch (Exception ex2)
            {
                _logger.LogError("An exception was thrown attempting
                                  to execute the error handler.", ex2);
            }
            finally
            {
                context.Request.Path = originalPath;
            }

            throw; // Re-throw the original if we couldn't handle it
        }
    }
}

And you need to register it with StartUp.cs:

public class Startup
{
    public void Configure(IApplicationBuilder app, 
                          IHostingEnvironment env, 
                          ILoggerFactory loggerfactory)
    {
       app.UseMiddleWare<ExceptionHandlerMiddleware>();
    }
}

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Alternatively, if you just want to return an arbitrary status code and aren't concerned with the Exception-based approach, you can use

return new HttpStatusCodeResult(400);

Update: as of .NET Core RC 2, the Http prefix is dropped. It is now:

return new StatusCodeResult(400);

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The Microsoft.AspNet.Mvc.Controller base class exposes a HttpBadRequest(string) overload which takes an error message to return to the client. So from within a controller action, you could call:

return HttpBadRequest("Bad Request.");

Ultimately my nose says any private methods called from within a controller action should either be fully http-context-aware and return an IActionResult, or perform some other small task completely isolated from the fact that it's inside of an http pipeline. Granted this is my personal opinion, but a class that performs some piece of business logic should not be returning HTTP status codes, and instead should be throwing its own exceptions which can be caught and translated at the controller/action level.

ReferenceURL : https://stackoverflow.com/questions/31054012/asp-net-core-equivalent-of-asp-net-mvc-5s-httpexception