为什么我的查询字符串这么长

我正在使用MVC 5，刚刚得到以下消息:

"请求过滤模块配置为拒绝查询字符串过长的请求。"

为什么我的查询字符串这么长?
注意它是如何一遍又一遍地重复同样的信息。我目前正在尝试默认[授权]使用全局过滤，但我没有改变任何在WEB.CONFIG…是什么导致了这种情况?

查询字符串如下:
localhost: 80/个人/账户/登录?ReturnUrl = % 2 fyourapplication % 2 faccount % 2 flogin % 252 fyourapplication freturnurl % 3 d % % 252 faccount % 252 flogin % 253 freturnurl % 253 d % 25252 fyourapplication % 25252 faccount % 25252 flogin % 25252 freturnurl % 25253 d % 2525252 fyourapplication % 2525252 faccount % 2525252 flogin % 2525253 freturnurl % 2525253 d % 2525253 fyourapplication % 252525252 faccount % 252525252 flogin % 252525252 freturnurl % 252525253 d % 25252525252 fyourapplication % 25252525252 faccount % 25252525252 flogin % 25252525253 freturnurl % 25252525253 d % 25252525253 fyourapplication % 2525252525252 faccount % 5252525252 flogin % 5252525252 freturnurl % 2525252525253 d % 252525252525252 fyourapplication % 252525252525252 faccount % 252525252525252 flogin % 252525252525253 freturnurl % 252525252525253 d % 252525252525253 fyourapplication % 25252525252525252 faccount % 25252525252525252 flogin % 25252525252525252 freturnurl % 25252525252525253 d % 2525252525252525252 fyourapplication % 2525252525252525252 faccount % 2525252525252525252 flogin % 2525252525252525253 freturnurl % 2525252525252525253 d % 2525252525252525253 fyourapp申请% 252525252525252525252 faccount % 252525252525252525252 flogin % 252525252525252525253 freturnurl % 252525252525252525253 d % 252525252525252525253 fyourapplication % 252525252525252525253 faccount % 25252525252525252525252 flogin % 25252525252525252525252 freturnurl % 25252525252525252525253 d % 2525252525252525252525252 fyourapplication % 2525252525252525252525252 faccount % 2525252525252525252525252 flogin % 2525252525252525252525253 freturnurl % 2525252525252525252525253 d % 2525252525252525252525253 fyourapplication % 252525252525252525252525252 faccount % 2525252525252525252525252 flogin % 2525252525252525252525252 freturnurl % 252525252525252525252525253 d % 25252525252525252525252525252 fyourapplication % 25252525252525252525252525252 faccount % 25252525252525252525252525252 flogin % 25252525252525252525252525253 freturnurl % 25252525252525252525252525253 d % 25252525252525252525252525253 fyourapplication % 2525252525252525252525252525252 faccount % 2525252525252525252525252525252 flogin % 2525252525252525252525252525252 freturnurl % 2525252525252525252525252525253 d % 252525252525252525252525252525252 fyourapplication % 252525252525252525252525252525252 faccount % 252525252525252525252525252525252 flogin

代码如下:
我正在测试我是否可以在任何地方默认为[授权]& &;仍然有我的自定义错误页面出现。但是，出现上述错误而不是重定向。我在WEB.CONFIG中没有" httpererrors "或"customErrors"条目。

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();
    GlobalConfiguration.Configure(WebApiConfig.Register);
    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    RouteConfig.RegisterRoutes(RouteTable.Routes);
    BundleConfig.RegisterBundles(BundleTable.Bundles);
}
protected void Application_Error(object sender, EventArgs e)
{
    var exception = Server.GetLastError();
    var httpException = exception as HttpException;
    Response.Clear();
    Server.ClearError();
    var routeData = new RouteData();
    routeData.Values["controller"] = "Error";
    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"] = "Forbidden";
                break;
            case 404:
                routeData.Values["action"] = "NotFound";
                break;
           case 500:
                routeData.Values["action"] = "UnExpected";
                break;
        }
    }
    IController errorsController = new ErrorController();
    var rc = new RequestContext(new HttpContextWrapper(Context), routeData);
    errorsController.Execute(rc);
}
public class FilterConfig
{
    #region <Methods>
    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
        // FORCE: Authorize on all actions (by default)
        filters.Add(new AuthorizeAttribute());
    }
    #endregion
}
// The AUTHORIZE ATTRIBUTE is now defaulted on all actions...so we don't need it here
public class AccountController : BaseController
{
    #region <Actions>
    [HttpGet]
    // The TEST is to see the ERRORS PAGE COME UP so put nothing here
    public ActionResult Login(string returnUrl)
    {
        // The user-call should be redirected to the error page when called...but oddly isn't
    }
    #endregion
}
[AllowAnonymous]
public class ErrorsController : Controller
{
    #region <Actions>
    // GET: /Errors/Unexpected
    [HttpGet]
    [AllowAnonymous]
    public ActionResult Unexpected()
    {
        TraceHandler.TraceIn(TraceLevel.Error);
        var unitOfWork = new ApplicationUnitOfWork();
        var viewModel = new UnExpectedErrorViewModel(unitOfWork);
        Response.StatusCode = (int)viewModel.StatusCode;
        Response.TrySkipIisCustomErrors = true;
        TraceHandler.TraceOut();
        return View(viewModel);
    }
    // GET: /Errors/Forbidden
    [HttpGet]
    [AllowAnonymous]
    public ActionResult Forbidden()
    {
        TraceHandler.TraceIn(TraceLevel.Error);
        var unitOfWork = new ApplicationUnitOfWork();
        var viewModel = new ForbiddenErrorViewModel(unitOfWork);
        Response.StatusCode = (int)viewModel.StatusCode;
        Response.TrySkipIisCustomErrors = true;
        Response.SuppressFormsAuthenticationRedirect = true;
        TraceHandler.TraceOut();
        return View(viewModel);
    }
    // GET: /Errors/NotFound
    [HttpGet]
    [AllowAnonymous]
    public ActionResult NotFound()
    {
        TraceHandler.TraceIn(TraceLevel.Error);
        var unitOfWork = new ApplicationUnitOfWork();
        var viewModel = new NotFoundErrorViewModel(unitOfWork);
        Response.StatusCode = (int)viewModel.StatusCode;
        Response.TrySkipIisCustomErrors = true;
        TraceHandler.TraceOut();
        return View(viewModel);
    }
    #endregion
}