JS Ajax cross-domain blocked CORS header missing ' access-control-allow-origin ' (GO)

Today, when Ajax requests a domain name, it appears

Cross-origin requests have been blocked: the same-origin policy prohibits reading remote resources located in http://www.zuimeimami.com*****. (Reason: CORS header is missing ' Access-control-allow-origin ').

Workaround 1:

var url= ' http://localhost:8080/WorkGroupManagment/open/getGroupById '       + '? id=1&callback=? ';   $.ajax ({     url:url,     dataType: ' Jsonp ',     processdata:false,      type: ' Get ',     success:function (data) {       alert (data.name)     ,     error:function (XMLHttpRequest, Textstatus, Errorthrown) {       alert ( Xmlhttprequest.status);       alert (xmlhttprequest.readystate);       alert (textstatus);     }});

Workaround 2:

var url= "Http://localhost:8080/WorkGroupManagment/open/getGroupById"    + "? id=1&callback=?"; $.jsonp ({  "url": URL,  "Success": function (data) {    $ ("#current-group"). Text ("Current workgroup:" +data.result.name) ;  },  "error": function (d,msg) {    alert ("Could not find User" +msg);}  );

Solution Three:

The requested page with the following code, the best content to fill in the domain name

<meta http-equiv= "Access-control-allow-origin" content= "*" >

Workaround four, in the request controller plus

header( "Access-Control-Allow-Origin: *" );

JS Ajax cross-domain blocked CORS header missing ' access-control-allow-origin ' (GO)