Javascript
jqXHR = $.ajax({ url: $frm.attr("action"), type: "POST", dataType: "json", cache: false,
headers: headers, contentType: "application/json;charset=UTF-8", data: ko.mapping.toJSON(data, map),
beforeSend: function(x) {
if (x && x.overrideMimeType) {
return x.overrideMimeType("application/json;charset=UTF-8");
}
}
});
jqXHR.fail(function(xhr, err, msg) { /* xhr.responseText NEED TO BE JSON!!! */ });
在Chrome中
标题
Request Method:POST
Status Code:400 Bad Request
Request Headersview source
Accept:application/json, text/javascript, */*; q=0.01
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8,pt-BR;q=0.6,pt;q=0.4
Connection:keep-alive
Content-Length:10
Content-Type:application/json;charset=UTF-8
User-Agent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.117 Safari/537.36
X-Requested-With:XMLHttpRequest
Request Payloadview source {Id:0}
Response Headersview source
Cache-Control:private
Content-Length:54
Content-Type:application/json; charset=utf-8
Date:Thu, 27 Feb 2014 14:01:59 GMT
Server:Microsoft-IIS/8.0
X-AspNet-Version:4.0.30319
X-AspNetMvc-Version:5.1
X-Powered-By:ASP.NET
响应
[{"Name":"Nome","ErrorMessage":"字段是必需的。"}]
在Chrome中工作！
在IE8中
请求头
POST /Motivos/Salvar HTTP/1.1
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: pt-br
x-requested-with: XMLHttpRequest
Content-Type: application/json;charset=UTF-8
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)
Content-Length: 10
Connection: Keep-Alive
Pragma: no-cache
标题（响应）
HTTP/1.1 400 Bad Request
Cache-Control: private
Content-Type: text/html
Server: Microsoft-IIS/8.0
X-AspNetMvc-Version: 5.1
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Thu, 27 Feb 2014 13:51:46 GMT
Content-Length: 11
Bad Request
不能工作!!
Asp.net MVC
过滤器
public class HandleExceptionAttribute : HandleErrorAttribute
{
public override void OnException(ExceptionContext filterContext)
{
if (filterContext.HttpContext.Request.IsAjaxRequest() && filterContext.Exception != null)
{
filterContext.HttpContext.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
var ex = filterContext.Exception.GetBaseException();
filterContext.Result = new JsonResult
{
JsonRequestBehavior = JsonRequestBehavior.AllowGet,
Data = new
{
ex.Message,
ex.GetType().Name
}
};
filterContext.ExceptionHandled = true;
}
else
{
base.OnException(filterContext);
}
}
}
应用于 GlobalFilterCollection
控制器
[ValidateJsonAntiForgeryToken, HttpPost]
public virtual JsonResult Salvar(TViewModel viewModel)
{
if (ModelState.IsValid)
{
TEntity model;
if (default(TKey).Equals(viewModel.Id))
{
model = Mapper.Map<TEntity>(viewModel);
AdicionarEntidade(model, viewModel);
}
else
{
model = Repositorio.Get(viewModel.Id);
Mapper.Map(viewModel, model, typeof(TViewModel), typeof(TEntity));
SalvarEntidade(model, viewModel);
}
return SalvarResult(model);
}
Response.StatusCode = 400;
return Json(ModelState.ToJson(), JsonRequestBehavior.AllowGet);
}
扩展
public static object ToJson(this ModelStateDictionary dic, params string[] othersMessages)
{
var states = (from e in dic where e.Value.Errors.Count > 0
select new { Name = e.Key, e.Value.Errors[0].ErrorMessage }).ToList();
if (othersMessages != null)
foreach (var message in othersMessages)
states.Add(new { Name = "", ErrorMessage = message });
return states;
}
问题
- 为什么没有xhr.responseText对象？
- 如何以与Chrome恢复的方式检索JSON？
我需要JSON来填充表单！
注释：2014年3月11日
当我在控制器中添加Response.TrySkipIisCustomErrors = true;时，它可以工作！responseText返回JSON。为什么？
processData: false，错误仍然发生。关于beforeSend，这只是一个测试。即使删除了此事件，该错误仍会发生！ - ridermansb"{"Id":"0"}"，在Chrome中"{"Id":"0"}"。 - ridermansb400 Bad Request？ - Brian North