try to pakage ajax by myself
optional paramas:
- method: get(default) post
- url
- data: Allow Type: Object, FormData
- dataType: Object(default) , auto translate to urldecode json file
- async: true(default) false
- showProgress: if dataType is “file” and this is a function, it will be called instantly
- success: callback function while request successfully param: server responseText
- fail: callback funciton while request failed
main function
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| function ajax(options){
var opt = {
method: "GET",
async: true,
}
//if browser dosen't support Object.assign() you can define by yourself
Object.assign(opt,options)
if(!opt.url) return
var XMLHttp = null
if(XMLHttpRequest){
XMLHttp = new XMLHttpRequest()
}else{
XMLHttp = new ActiveXObject("Microsoft.XMLHTTP")
}
//method: post
if(!!opt.method && opt.method.toUpperCase() == "POST"){
XMLHttp.open("POST",opt.url,opt.async)
//dataType: json
if(!!opt.dataType && opt.dataType.toUpperCase() == "JSON"){
opt.postData = JSON.stringify(opt.data)
XMLHttp.setRequestHeader("Content-Type","application/json")
XMLHttp.send(opt.postData)
}
//dataType: file
else if(!!opt.dataType && opt.dataType.toUpperCase() == "FILE"){
XMLHttp.send(opt.data)
}
//dataType: Object
else{
var param = []
for(var key in opt.data){
if(opt.data.hasOwnProperty(key)){
param.push(key+"="+opt.data[key])
}
}
opt.postData = param.join('&')
var urlparams = opt.url.slice(opt.url.indexOf('?')+1)
if(urlparams.indexOf('?') == -1){
opt.postData.concat('&'+urlparams)
}
XMLHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded;charset=utf-8')
XMLHttp.send(opt.postData)
}
}
//method: get
else if(opt.method.toUpperCase() === "GET"){
var params = []
if(!!opt.data){
for(var key in opt.data){
if(opt.data.hasOwnProperty(key)){
params.push(key + '=' + opt.data[key])
}
}
opt.postData = params.join('&')
}
if(!!opt.postData){
opt.url.concat('&'+opt.postData)
}
XMLHttp.open('GET',opt.url,opt.async)
XMLHttp.send()
}
//handle response
if(!!opt.dataType && opt.dataType.toUpperCase() == "FILE" && typeof opt.showProgress == "function"){
if("onprogress" in (new XMLHttpRequest)){
XMLHttp.onprogress = function(e){
if(e.lengthComputable){
var percent = Math.round(100*e.loaded/e.total)+"%"
opt.showProgress(percent)
}
}
XMLHttp.onload = function(){
var MSG = JSON.parse(request.responseText);
opt.success(MSG)
}
}else{
XMLHttp.onreadystatechange = function(){
if(XMLHttp.readyState == 4){
if(XMLHttp.status == 200){
var res = XMLHttp.responseText
try{
res = JSON.parse(res)
}catch(e){
console.warn(e)
}
return !!opt.success?opt.success(res):null
}else{
return !!opt.fail?opt.fail(XMLHttp.status,XMLHttp.statusText):null
}
}
}
}
}else{
XMLHttp.onreadystatechange = function(){
if(XMLHttp.readyState == 4){
if(XMLHttp.status == 200){
var res = XMLHttp.responseText
try{
res = JSON.parse(res)
}catch(e){
console.warn(e)
}
return !!opt.success?opt.success(res):null
}else{
return !!opt.fail?opt.fail(XMLHttp.status,XMLHttp.statusText):null
}
}
}
}
}
|
