//script标记可以发送不同源请求
function jsonp(url,params,callback){
var funcName = "jsonp_" + Date.now() + Math.random().toString().substr(2,5);
if(typeof params == "object"){
var tempArr = [];
for (var key in params) {
var value = params[key];
tempArr.push(key + "=" + value);
}
params = tempArr.join("&");
}
var script = document.createElement("script");
script.src = url + "?" + params + "&callback=" + funcName;
document.body.appendChild(script);
window[funcName] = function(data){
callback(data);
delete window[funcName];
document.body.removeChild(script);
}
}
//服务器端加上下面这句,就可以实现不同源访问,就直接使用ajax访问即可
header('Access-Control-Allow-Origin: *');
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