抛出HttpException总是返回HTTP 500错误

本文关键字：HTTP 错误 返回 HttpException 抛出 | 更新日期: 2023-09-27 17:49:42

我正试图向客户端抛出HTTP 403错误代码。我读到HttpException是最干净的方式来完成这一点，但它不适合我。我从页面内抛出异常，如下所示:

throw new HttpException(403,"You must be logged in to access this resource.");

然而，这只会给出一个标准的ASP。当CustomErrors关闭时，Net堆栈跟踪(带有500个错误)。如果CustomErrors打开，那么当发生403错误时，它不会重定向到我设置的要显示的页面。我应该忘记HttpException，而是自己设置所有的HTTP代码吗?我该如何解决这个问题?

Web的自定义错误部分。配置如下:

<customErrors mode="On" defaultRedirect="GenericErrorPage.html">
      <error statusCode="403" redirect="Forbidden.html" />
</customErrors>

不是得到Forbidden.html，而是得到GenericErrorPage.html

抛出HttpException总是返回HTTP 500错误

您需要像这样覆盖应用程序错误:

    protected void Application_Error()
    {
        var exception = Server.GetLastError();
        var httpException = exception as HttpException;
        Response.Clear();
        Server.ClearError();
        
        var routeData = new RouteData();
        routeData.Values["controller"] = "Errors";
        routeData.Values["action"] = "General";
        routeData.Values["exception"] = exception;
        Response.StatusCode = 500;
        if (httpException != null)
        {
            Response.StatusCode = httpException.GetHttpCode();
            switch (Response.StatusCode)
            {
                case 403:
                    routeData.Values["action"] = "Http403";
                    break;
                case 404:
                    routeData.Values["action"] = "Http404";
                    break;
            }
        }
        IController errorsController = new ErrorsController();
        var rc = new RequestContext(new HttpContextWrapper(Context), routeData);
        errorsController.Execute(rc);
    }

然后添加errorsController:

public class ErrorsController : Controller
{
    public ActionResult General(Exception exception)
    {
        ViewBag.ErrorCode = Response.StatusCode;
        ViewBag.Message = "Error Happened";
        //you should log your exception here
        return View("Index");
    }
    public ActionResult Http404()
    {
        ViewBag.ErrorCode = Response.StatusCode;
        ViewBag.Message = "Not Found";
        return View("Index");
    }
    public ActionResult Http403()
    {
        ViewBag.Message = Response.StatusCode;
        ViewBag.Message = "Forbidden";
        return View("Index");
    }
}

最后为errorsController创建一个视图。我只在Views/Errors/中创建了一个名为index的视图

这个代码包含在元素configuration/system中。web of web。配置文件:

  <customErrors mode="On">
    <error statusCode="403" redirect="~/errors/Forbidden.aspx"/>
  </customErrors>

我设法使它按预期工作。

你可以在这里找到一个很好的示例教程(示例3是正确的):http://aspnetresources.com/articles/CustomErrorPages

或者您可以使用Response。这样做的状态:Asp Classic返回特定的http状态码

我实际上已经创建了我自己的漂亮的小类来解决这个问题。它不能处理一切，我不确定它与MVC很好，但它适用于我的使用。基本上，不依赖于ASP。Net输出正确的错误页面和错误代码，它将清除错误，然后执行服务器端传输并显示适当的Web。配置错误页面。它还可以识别customErrors模式并做出相应的反应。

public static class CustomErrorsFixer
{
    static public void HandleErrors(HttpContext Context)
    {
        if(RunIt(Context)==false){
            return;
        }
        HttpException ex = Context.Error as HttpException;
        if(ex==null){
            try{
                ex=Context.Error.InnerException as HttpException;
            }catch{
                ex=null;
            }
        }
        if (ex != null){
            Context.Response.StatusCode = ex.GetHttpCode();
        }else{
            Context.Response.StatusCode = 500;
        }
        Context.ClearError();
        Context.Server.Transfer(GetCustomError(Context.Response.StatusCode.ToString()));
        HttpContext.Current.Response.End();
    }
    static protected string GetCustomError(string code)
    {
        CustomErrorsSection section = ConfigurationManager.GetSection("system.web/customErrors") as CustomErrorsSection;
        if (section != null)
        {
            CustomError page = section.Errors[code];
            if (page != null)
            {
                return page.Redirect;
            }
        }
        return section.DefaultRedirect;
    }
    static protected bool RunIt(HttpContext context){
        CustomErrorsSection section = ConfigurationManager.GetSection("system.web/customErrors") as CustomErrorsSection;
        switch(section.Mode){
            case CustomErrorsMode.Off:
                return false;
            case CustomErrorsMode.On:
                return true;
            case CustomErrorsMode.RemoteOnly:
                return !(context.Request.UserHostAddress=="127.0.0.1");
            default:
                return true;
        }
    }
}

然后激活它，只需在global。asax

中添加一个小的东西
    protected virtual void Application_Error (Object sender, EventArgs e)
    {
        CustomErrorsFixer.HandleErrors(Context);
    }
相关文章：