一例jsonp跨域访问

对于网站A，有一链接 '/auth/list'，返回json数据

{"value": [{"id": , "link": "gd/list", "description": "\u67e5\u8be2\u5546\u54c1\u4e3b\u6570\u636e", 
"role": , "fullpath": "goodsinfo/Goodsinfo/gdlist", "ismenu": , "menulevel": , "saiwa": , "authno": },
{"id": , "link": "gd/insert", "description": "\u6dfb\u52a0\u5546\u54c1\u4e3b\u6570\u636e",
"role": , "fullpath": "goodsinfo/Goodsinfo/gdinsert", "ismenu": , "menulevel": , "saiwa": , "authno": }]}

网站b某页面下可以这样写jsonp get请求

<script>
    var anothersite = "http://"+'127.0.0.1:8989';
    function usejsonp() {
        var wenwa =  anothersite;
        alert(wenwa);
        $.ajax({
            url:anothersite+'/auth/list',
            type:'get',
            dataType:"json",
            jsonp: "callback",
            //jsonpCallback:'showdata',
            success:function (data) {
                console.log("可能已经成功");
                console.log(data)
            }
        })
    }
</script>

这样，网站b也可以拿到页面最开始展示的json数据