原生js封装

function ajaxRequest(type, url, data, callback, failCallBack, header, dataType) {	var url_encode = function (str) {		return encodeURIComponent(str)			.replace(/ /gi, '+')			.replace(/~/gi, '%7e')			.replace(/'/gi, '%26%2339%3b');	};	type = String(type || 'GET').toUpperCase();	if (type == 'GET') {		var dataStr = typeof (data) === 'string' ? data : '';		if (typeof (data) === 'object')			for (var key in data) {				if (Object.prototype.toString.call((data[key])) == '[object Array]') {					for (var a = 0; a < data[key].length; a++)						if (data[key][a] !== undefined) dataStr += key + "=" + url_encode(data[key][a]) + "&";				}				if (data[key] !== "" && data[key] !== null) dataStr += key + '=' + url_encode(data[key]) + '&';			}		if (dataStr !== '') {			dataStr = dataStr.substr(0, dataStr.lastIndexOf('&'));			url = url + '?' + dataStr;		}	}	var sendData = '';	var contentType = 'application/x-www-form-urlencoded; charset=utf-8';	if (type == "FORM") {		if (typeof (data) === 'string') sendData = data;		if (typeof (data) === 'object')			for (var key in data) {				if (Object.prototype.toString.call((data[key])) == '[object Array]') {					for (var a = 0; a < data[key].length; a++)						if (data[key] !== undefined) sendData += key + "=" + url_encode(data[key][a]) + "&";				}				else if (data[key] !== "" && data[key] !== null) sendData += key + "=" + url_encode(data[key]) + "&";			}	}	if (type == 'JSON') {		debugger		sendData = JSON.stringify(data);		contentType = "application/json; charset=utf-8";	}	if (!failCallBack) failCallBack = console.log;	var requestObj = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject;	requestObj.onreadystatechange = () => {		if (requestObj.readyState == 4) {			if (requestObj.status == 200) {				var obj = requestObj.response				if (String(dataType).toLowerCase() === 'html') return callback(obj);				if (typeof obj !== 'object') obj = JSON.parse(obj);				if (obj.code === 0) return callback(obj.data);				failCallBack(obj);			} else {				failCallBack(requestObj)			}		}	};	requestObj.open(type == 'GET' ? type : 'POST', url, true);	if (type != 'GET') requestObj.setRequestHeader("Content-type", contentType);	if (typeof (header) === 'object') for (var key in header) requestObj.setRequestHeader(key, header[key]);	requestObj.send(sendData || null);}

 

二次封装，统一处理token，未登录

top.ajaxRequest2 = ajaxRequest; ajaxRequest = function (type, url, data, callback, failCallBack, header, dataType) { if (!header) header = {}; header.token = localStorage.getItem('token'); if (!header.token) delete header.token; top.ajaxRequest2(type, url, data, callback, function (d) { if (d.code === 5009) localStorage.removeItem('token');/*登陆TOKEN失效_请重新登陆*/d.url = type + ' ' + url; console.error(d); if (failCallBack) failCallBack(d); }, header, dataType); };