jsonResult未由OnActionExecuting事件返回

Question

我已经创建了一个ActionFilterAttribute，在允许MVC控制器get/post请求被处理之前，它可以验证帐户的可处理性。如果帐户不可用，我希望向客户端返回一个错误。如果请求是ajax帖子，我希望在响应中包含json数据。由于某种原因，json数据只有在浏览器和网站在同一台机器上运行时才返回到浏览器。如果我在另一台机器上浏览网站并预编好ajax帖子，响应内容-类型将以"text/html“的形式返回。但是，如果浏览器运行在与网站相同的机器上，响应内容-类型将正确返回为"application/json“。

我做错了什么？

ActionFilterAttribute

public override void OnActionExecuting(ActionExecutingContext filterContext)
{
    base.OnActionExecuting(filterContext);

    if (filterContext.Result == null)
    {
        if (IsAccountUnavailable(Key))
        {
            if (filterContext.HttpContext.Request.IsAjaxRequest())
            {
                filterContext.HttpContext.Response.StatusCode = (int)HttpStatusCode.Conflict;
                filterContext.HttpContext.Response.ContentType = "application/json";
                filterContext.Result = new JsonResult
                {
                    Data = new {Error = "Unavailable", Url = GetLogOffUrl()},
                    JsonRequestBehavior = JsonRequestBehavior.AllowGet
                };
            }
          else
                filterContext.Result = new RedirectResult(GetLogOffUrl());
        }
    }
}

jQuery ajax帖子

$.ajax({
    url: window.location.href,
    type: 'POST',
    data: JSON.stringify(ko.mapping.toJS(serverModel.SelectionsViewModel)),
    contentType: "application/json; charset=utf-8",
    dataType: 'json'
})
    .done(function (data) {
        if (data.isValid)
            window.location.href = serverModel.NextView();
        else
            showGenericSaveError();
    })
    .fail(function (jqXhr) {
        handleAjaxError(jqXhr);
    });
};

Answer 1

由于一位同事找到了下面这篇文章，我的问题已经解决了。我需要设置Response.TrySkipIisCustomErrors = true

Returning http status code 409 Conflict (without ASP.NET MVC alterations)

工作密码..。

public override void OnActionExecuting(ActionExecutingContext filterContext)
{
    base.OnActionExecuting(filterContext);

    if (filterContext.Result == null)
    {
        if (QuoteServiceLayer.IsAccountUnavailable(AccountKey, EnrollmentPeriodType, EmployeeKey))
        {
            if (filterContext.HttpContext.Request.IsAjaxRequest())
            {
                filterContext.HttpContext.Response.StatusCode = (int)HttpStatusCode.Conflict;
                filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;
                filterContext.Result = new JsonResult
                {
                    Data = new {Error = "Unavailable", Url = GetLogOffUrl()},
                    JsonRequestBehavior = JsonRequestBehavior.AllowGet
                };
            }
        else
            filterContext.Result = new RedirectResult(GetLogOffUrl());
        }
    }
}