Use jsonp to obtain data across domains.
js part
(function(window, document) {
'use strict';
var jsonp = function(url, data, callback) {
//1、挂载回调函数
var fnsuffix = Math.random().toString().replace('.', '');
var cbFuncName = 'my_json_cb' + fnsuffix;
window[cbFuncName] = callback;
//2、将data转换成url字符串的形式
//{id=1,count=4}==>id=1&count=4
var querystring = url.indexOf('?') == -1 ? '?' : '&'; //判断url中最后是否有？，没有则为？
for (var key in data) {
querystring += key + '=' + data[key] + '&';
}
//3、处理url中回调函数 url+=callback=sdgade
querystring += 'callback=' + cbFuncName;
//querystring=?id=1&count=4&callback=sdgade
//4、创建一个script标签
var scriptElement = document.createElement('script');
scriptElement.src = url + querystring;
//5、把script标签放到页面上
document.body.appendChild(scriptElement);
};
window.$jsonp = jsonp;
})(window, document)Test
<!DOCTYPE html>
<html>
<head>
<title>jsonp</title>
</head>
<body>
<div id="htt"></div>
<script type="text/javascript" src="http.js"></script>
<script>
(function(){
$jsonp('http://api.douban.com/v2/movie/in_theaters',{},
function(data){
document.getElementById('htt').innerHTML=JSON.stringify(data);
});
})()
</script>
</body>
</html>in the page and the result can be returned. The page displays as, indicating that the acquisition is successful!
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