代码：
function ajax(){this.xhrthis.datathis.strtojson = function(str){ var arr = str.split('&') var json = {} for(var i in arr){ var k = arr[i].split('=')[0] var v = arr[i].split('=')[1] json[k] = v } return json}this.jsontostr = function(json){ var arr = new Array() for(var k in json){ var v = json[k] var val = k+'='+v arr.push(val) } var str = arr.join('&') return str}this.parseurl = function(url){ var reg = /(?:([A-Za-z]+):)?(\/{0,3})?(?:(.*):(.*)@)?([0-9.\-A-Za-z]+)(?::(\d+))?(?:\/([^?#]*))?(?:\?([^#]*))?(?:#(.*))?/ var res = reg.exec(url) var scheme = (res[1])?res[1]:'http' var user = (res[3])?res[3]:'' var pass = (res[4])?res[4]:'' var host = (res[5])?res[5]:'' var port = (res[6])?res[6]:'' var path = (res[7])?res[7]:'' var query = (res[8])?res[8]:'' var fragment = (res[9])?res[9]:'' var ret = { scheme:scheme, host:host, port:port, user:user, pass:pass, path:path, query:query, fragment:fragment } return ret}this.init = function(){ if(window.XMLHttpRequest){ this.xhr=new XMLHttpRequest() }else{ this.xhr=new ActiveXObject("Microsoft.XMLHTTP") } return this}this.before = function(func){ this.xhr.addEventListener('readystatechange',function(){ if(this.readyState < 4){ func() } }) return this}this.success = function(func){ this.xhr.addEventListener('readystatechange',function(){ if (this.readyState == 4 && this.status == 200){ var res if(this.getResponseHeader('content-type')==='application/json'){ res = JSON.parse(this.responseText) }else{ res = this.responseText } func(res) } }) return this}this.error = function(func){ this.xhr.addEventListener('readystatechange',function(){ if(this.readyState == 4 && this.status != 200){ this.xhr.abort() func() } }) return this}this.progress = function(func){ this.xhr.upload.addEventListener('progress',function(e){ if(e.lengthComputable){ var loading = Math.round(e.loaded / e.total * 100); func(loading) } }) return this}this.request = function(obj){ var data = obj.data var url = obj.url var type = obj.type var async = obj.async var auth = obj.auth this.init() if(type == 'post'){ this.xhr.open(type,url,async) this.xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded") if(data instanceof Object){ if(data instanceof FormData){ var obj = {} data.forEach(function(val,key){ if((key != 'undefined') && (val != 'undefined')){ obj[key] = val } }) data = this.jsontostr(obj) }else{ data = this.jsontostr(data) } } }else if(type == 'get'){ var info = this.parseurl(url) var scheme = info.scheme var host = info.host var path = info.path var query = info.query if(data instanceof Object){ if(data instanceof FormData){ var obj = {} data.forEach(function(val,key){ if((key != 'undefined') && (val != 'undefined')){ obj[key] = val } }) data = this.jsontostr(obj) }else{ data = this.jsontostr(data) } } var psep = (path)?'/':'' var sep = (query || data)?'?':'' url = scheme+'://'+host+psep+path+sep+query+data data = '' this.xhr.open(type,url,async) }else if(type == 'json'){ this.xhr.open('post',url,async) this.xhr.setRequestHeader("Content-type", "application/json") if((typeof(data)=='string')||(data instanceof String)){ data = this.strtojson(data) }else if(data instanceof Object){ if(data instanceof FormData){ var obj = {} data.forEach(function(val,key){ if((key != 'undefined') && (val != 'undefined')){ obj[key] = val } }) data = obj } } data = JSON.stringify(data) }else if(type == 'file'){ this.xhr.open('post',url,async) if((typeof(data)=='string')||(data instanceof String)){ return false }else if(data instanceof Object){ if(!data instanceof FormData){ return false } } } if(auth){ this.xhr.withCredentials = true this.xhr.setRequestHeader("Authorization", "Basic " + btoa(auth)) } this.data = data return this}this.send = function(){ this.xhr.send(this.data)}}用法：
var ajax = new ajax()var data = {data:'name=lee&sex=male',url:'http://localhost/test.php',type:'post',async:true}ajax.request(data).progress(function(loading){console.log(loading)}).success(function(data){console.log(data)}).error(function(){console.log(2)}).send()
随时随地看视频
