使用原生js封裝的ajax(相容jsonp)
阿新 • • 發佈:2019-02-02
/* 封裝ajax函式
* @param {string}opt.type http連線的方式,包括POST和GET兩種方式
* @param {string}opt.url 傳送請求的url
* @param {boolean}opt.async 是否為非同步請求,true為非同步的,false為同步的
* @param {object}opt.data 傳送的引數,格式為物件型別
* @param {function}opt.success ajax傳送並接收成功呼叫的回撥函式
*/
function ajax(opt) {
opt = opt || {};
opt.method = opt.method.toUpperCase() || 'POST' ;
opt.url = opt.url || '';
opt.async = opt.async || true;
opt.data = opt.data || null;
opt.success = opt.success || function () {};
opt.dataType = opt.dataType || "json";
var xmlHttp = null;
if (XMLHttpRequest) {
xmlHttp = new XMLHttpRequest();
}
else {
xmlHttp = new ActiveXObject('Microsoft.XMLHTTP');
}var params = [];
for (var key in opt.data){
params.push(key + '=' + opt.data[key]);
}
var postData = params.join('&');
if (opt.method.toUpperCase() === 'POST') {
xmlHttp.open(opt.method, opt.url, opt.async);
xmlHttp.setRequestHeader('Content-Type' , 'application/x-www-form-urlencoded;charset=utf-8');
xmlHttp.send(postData);
}
else if (opt.method.toUpperCase() === 'GET') {
xmlHttp.open(opt.method, opt.url + '?' + postData, opt.async);
xmlHttp.send(null);
}
xmlHttp.onreadystatechange = function () {
if(opt.dataType != 'jsonp'){
if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
opt.success(xmlHttp.responseText);
}
}else{
//alert(1);
if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
var oScript = document.createElement('script');
document.body.appendChild(oScript);
var callbackname = 'wangxiao'
oScript.src = opt.url + "?" + postData+'&callback='+callbackname;
window['wangxiao'] = function(data) {
opt.success(data);
document.body.removeChild(oScript);
};
}
}
};
}
export default ajax;