Ajax cross-Domain requests

Requirements: domain a. test.com to Ajax request B. General handler under test.com

1. Front-End AJAX requests: (Domain name a.test. com)

$.ajax ({dataType:"Jsonp", data: {"Ajaxmethod": "Getusergamesign", "Cookieid": Cookieid}, Jsonp:"Jsonp_callback",//server-side receive, for function name, arbitrarily definedURL: '/httpb. Test.com/ajax/usergamesign.ashx ',//request addresses for different domain namesSuccess: _callback,//You can also write function (Result) {...};Errorfunction() {alert (' Server Internal Error! ‘); }});var_callback =function(Result) {//result is the returned value: {"code": 0, "msg": "IB"}if(Result! =NULL) {    if(Result.code = = 0) {alert (result.msg); }}};

Other parameters:

// or postasync:false// I tried not to sync the effect

2. Server side:(under domain name b.test. com)

  Public classUsergamesign:basecommon, IHttpHandler { Public voidProcessRequest (HttpContext context) {Try                {                    if(!string. IsNullOrEmpty (context. request["Ajaxmethod"]))                    {                        stringResponseText =""; Context. Response.ContentType="Text/plain"; stringAjaxmethod = context. request["Ajaxmethod"].                        ToLower (); Switch(ajaxmethod) { Case "getusergamesign": ResponseText= This.                                Getusergamesign (context);  Break; default:                                 Break; } context. Response.Write (ResponseText); //results returned: {"code": 0, "msg": "IB"}context.                    Response.End (); }                }                Catch(Exception ex) //resolve this error: Thread was being aborted. explanation of the problem >> {if(! (ex isSystem.Threading.ThreadAbortException)) {context. Response.Write (ex.                        Message); Context.                    Response.End (); }                }        }        /// <summary>        ///Get user Tags/// </summary>        /// <param name= "context" ></param>        /// <returns></returns>         Public stringGetusergamesign (HttpContext context) {stringCookieidstr = context. request["Cookieid"]; stringStrformat ="{{\ "code\": {0},\ "msg\": \ "{1}\"}}"; //Determine if the Jsonp method is requested            stringJSONP =string.            Empty; if(!string. IsNullOrEmpty (httpcontext.current.request["Jsonp_callback"]) {JSONP= Context. request["Jsonp_callback"]; Context. Response.ContentType="Text/javascript"; } User User=NewUser (); stringUserProperty =user.            Getuseproperty (Cookieid); if(!string. IsNullOrEmpty (UserProperty)) {if(string. IsNullOrEmpty (JSONP)) {return string. Format (Strformat,0, UserProperty);//normal form return                }                Else                {
                     The return format of the//JSONP type : Jsonp ({"Code": 0, "msg": "IB"}) as a parameter of the front-end Ajax callback function                      returnJsonp +"("+string. Format (Strformat,0, UserProperty) +")";                }            }            Else            {                return string. Format (Strformat,-1,"failed"); }        }    }

Outside the station read:

jquery uses Jsonp for cross-domain calls

Jsonp detailed

Ajax and JSONP are not matter read in detail

Talk about JSON and JSONP, and maybe you'll be enlightened.

Ajax cross-domain requests