jsonp（跨域）-------可以运行的小实例！

来源：互联网发布：犀牛mac破解版下载编辑：程序博客网时间：2024/06/01 10:45
<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.js"></script></head><body><div id="divCustomers"></div><div id="divCustomers2"></div><script type="text/javascript">    //通过jquery的get方法实现跨域    $.get('https://ipinfo.io', function() {}, "jsonp").always(function(resp) {        var countryCode = (resp && resp.country) ? resp.country : "";        countryCode = countryCode.toLowerCase();        $('#divCustomers').text(countryCode);        localStorage.setItem('countryCode', countryCode);    });    //通过jquery的ajax方法实现跨域    $.ajax({        type: "get",        dataType:'jsonp',        url:'https://ipinfo.io',        success:function(resp){            var countryCode = (resp && resp.country) ? resp.country : "";            countryCode = countryCode.toLowerCase();            $('#divCustomers2').text(countryCode);            localStorage.setItem('countryCode', countryCode);        },    });    //通过原生javascript的封装的方法实现跨域    function jsonp(setting)    {        setting.data = setting.data || {};        setting.key = setting.key||'callback';        setting.callback = setting.callback||function(){};        setting.data[setting.key] = '__onGetData__';        window.__onGetData__ = function(data) {            setting.callback (data);        }        var script = document.createElement('script');        var query = [];        for(var key in setting.data)        {            query.push(key + '=' + encodeURIComponent(setting.data[key]));        }        script.src = setting.url + '?' + query.join('&');        document.head.appendChild(script);        document.head.removeChild(script);    }    jsonp({        url: 'http://photo.sina.cn/aj/index',        key: 'jsoncallback',        data: { page: 1, cate: 'recommend' },        callback: function(ret) {            console.log(ret)        }    });</script></body></html>
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