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.gitignore

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node_modules/

common/js/ajax.js

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function ajax(options){
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options = options ||{}; //调用函数时如果options没有指定,就给它赋值{},一个空的Object
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options.type=(options.type || "GET").toUpperCase();/// 请求格式GET、POST,默认为GET
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options.dataType=options.dataType || "json"; //响应数据格式,默认json
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var params=formatParams(options.data);//options.data请求的数据
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var xhr;
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//考虑兼容性
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if(window.XMLHttpRequest){
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xhr=new XMLHttpRequest();
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}else if(window.ActiveObject){//兼容IE6以下版本
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xhr=new ActiveXobject('Microsoft.XMLHTTP');
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}
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//启动并发送一个请求
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if(options.type=="GET"){
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xhr.open("GET",options.url+"?"+params,true);
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xhr.send(null);
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}else if(options.type=="POST"){
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xhr.open("post",options.url,true);
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//设置表单提交时的内容类型
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//Content-type数据请求的格式
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xhr.setRequestHeader("Content-type","application/x-www-form-urlencoded");
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xhr.send(params);
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}
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// 设置有效时间
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setTimeout(function(){
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if(xhr.readySate!=4){
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xhr.abort();
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}
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},options.timeout)
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// 接收
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// options.success成功之后的回调函数 options.error失败后的回调函数
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//xhr.responseText,xhr.responseXML 获得字符串形式的响应数据或者XML形式的响应数据
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xhr.onreadystatechange=function(){
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if(xhr.readyState==4){
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var status=xhr.status;
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if(status>=200&& status<300 || status==304){
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options.success&&options.success(xhr.responseText,xhr.responseXML);
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}else{
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options.error&&options.error(status);
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}
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}
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}
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}
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//格式化请求参数
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function formatParams(data){
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var arr=[];
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for(var name in data){
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arr.push(encodeURIComponent(name)+"="+encodeURIComponent(data[name]));
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}
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arr.push(("v="+Math.random()).replace(".",""));
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return arr.join("&");
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}
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