使用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

头

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} …