javascript – 从ie / firefox / chrome中的jquery调用跨域.net方法

function save() {
    if (jQuery.browser.msie && window.XDomainrequest) {
        // Use XDR
        var params = "{'height':" + 10 + ",'width':" + 10 + ",'pos':'" + 10 + "'}";
        var xdr = new XDomainrequest();
        xdr.onerror = alert_error;
        xdr.ontimeout = alert_timeout;
        xdr.onprogress = alert_progress;
        xdr.onload = alert_loaded;
        xdr.timeout = 10000;
        xdr.open("post",'http://domain/reciever.asmx/setdata');
        //Tried as webservice and as a normal aspx page
        //xdr.open("post",'http://domain/default.aspx');
        xdr.send(params);
    }
    else {
        var params = "pos=" + positions + "&width=" + screenWidth + "&height=" + screenHeight;
        var myAjax = new jQuery.ajax(
        "http://domain/default.aspx",{
            type: 'post',cache: false,crossDomain: true,data: params
        });
    }
}

在服务器端,web.config具有：

<httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Origin" value="*" />
  </customHeaders>
</httpProtocol>

和webservice

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public String setdata(int width,int height,String pos)

aspx@L_772_8@返回：

Response.Clear();
Response.ContentType = "text/plain";
response.addheader("Access-Control-Allow-Origin","*");
Response.End();

提琴手说：
fiddler在会话#2565中检测到协议违规.
内容长度不匹配：请求标头指示38个字节,但客户端发送0个字节.所以我相信它是“Access-Control-Allow-Origin”,但我已经设置了(据我所知).

有人可以帮我理解我做错了什么.

解决方法