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Accepted
EMyAccount
Asked: 2023-10-04 13:54:27 +0800 CST

如何将异常从异常处理中间件传递到 ASP.NET Core MVC Web 应用程序中的 ErrorController？

  • 772

我开发了一个全局异常处理中间件，并尝试将异常传递给ErrorCotroller我的 ASP.NET Core MVC 应用程序。

中间件：

public class GlobalExceptionHandlingMiddleware
{
    private readonly RequestDelegate _next;         

    public GlobalExceptionHandlingMiddleware(RequestDelegate request)
    {
        _next = request; 
    }

    public async Task Invoke(HttpContext httpContext)
    {
        try
        {
            await _next(httpContext);
        }
        catch(Exception ex)
        {
            await HandleExceptionAsync(httpContext, ex);
        }
    }

    private async Task HandleExceptionAsync(HttpContext httpContext, Exception ex)
    {           
        httpContext.Response.Redirect("/Error/Error");
        httpContext.Items["exception"] = ex;
    }
}

ErrorController:

public class ErrorController : Controller
{
    private readonly ILogger<ErrorController> _logger;

    public ErrorController(ILogger<ErrorController> logger)
    {
        _logger = logger;
    }        

    [Route("/Error/Error")]
    public IActionResult Error()
    {
        Exception exec = (Exception)HttpContext.Items["exception"];
        ViewData["message"] = exec.Message;
        _logger.LogError(exec, "Internal server error");
        return View("Error");
    }  
}

我尝试使用HttpContext.Items["exception"]将异常传递给ErrorController，但没有成功。

我怎样才能实现这个目标？

.net-core

1 个回答

  1. Best Answer

    像下面这样改变你的中间件，它对我有用。

    而且我不熟悉你的逻辑，你可以根据需要修改它。

    测试结果

    在此输入图像描述

    GlobalExceptionHandlingMiddleware.cs

    namespace AspCore7_Web_Identity
{
    public class GlobalExceptionHandlingMiddleware
    {
        private readonly RequestDelegate _next;

        public GlobalExceptionHandlingMiddleware(RequestDelegate next)
        {
            _next = next;
        }

        public async Task Invoke(HttpContext httpContext)
        {
            try
            {
                // Just for testing in my local
                //await HandleExceptionAsync(httpContext, new Exception("test exceptions"));
                await _next(httpContext);
            }
            catch (Exception ex)
            {
                await HandleExceptionAsync(httpContext, ex);
            }
        }

        private async Task HandleExceptionAsync(HttpContext httpContext, Exception ex)
        {
            httpContext.Items["exception"] = ex;

            PathString originalPath = httpContext.Request.Path;
            QueryString originalQueryString = httpContext.Request.QueryString;

            try
            {
                httpContext.Request.Path = "/Error/Error";
                httpContext.Request.QueryString = QueryString.Empty;

                await _next(httpContext);
            }
            finally
            {
                httpContext.Request.Path = originalPath;
                httpContext.Request.QueryString = originalQueryString;
            }
        }
    }

}

    在这里注册中间件

    在此输入图像描述

    • 1

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