1 (function (window) {
2 function AjaxTool() {
3 }
4
5 AjaxTool.ajaxRequest = function (url, paramObj, successCallback, failedCallback) {
6 var xhr = new XMLHttpRequest();
7 xhr.open('get', url + '?' + getStrWithObject(paramObj), true);
8 xhr.send();
9 xhr.addEventListener('readystatechange', function (ev2) {
10 if(xhr.readyState === 4){
11 if(xhr.status === 200){
12 // 请求成功
13 successCallback && successCallback(xhr);
14 }else {
15 // 请求失败
16 failedCallback && failedCallback(xhr);
17 }
18 }
19 });
20 };
21
22
23 /*
24 {
25 name: "张三"，
26 age: 18
27 }
28 [‘name="张三"’， “age=18”, "random=323323232"]
29 name="张三"&age=18
30 */
31 /**
32 * 把对象转换成拼接字符串
33 * @param {Object}paramObj
34 */
35 function getStrWithObject(paramObj) {
36 var resArr = [];
37 // 1. 转化对象
38 for (var key in paramObj) {
39 var str = key + '=' + paramObj[key];
40 resArr.push(str);
41 }
42 // 2. 拼接时间戳
43 resArr.push('random=' + getRandomStr());
44
45 // 3. 数组转成字符串
46 return resArr.join('&');
47 }
48
49 /**
50 * 获取随机时间戳
51 * @returns {number}
52 */
53 function getRandomStr() {
54 return Math.random() + (new Date().getTime());
55 }
56
57 window.AjaxTool = AjaxTool;
58 })(window);
