ajax module

ajax.js

/**
 * 发送ajax请求，允许传入一个配置对象和一个回调函数
 *
 * @param    {Object}  config     配置对象
 * 举例：var config = {
						method: 'GET',
						url: 'url',
						params: {number: 1, price: 10},
						async: true
         }
 * @param    {Function}  cb       回调函数
 *
 */
function ajax (config, cb) {
	var xhttp = new XMLHttpRequest()
	var method = config.method
	var url = config.url
	var params = JSON.stringify(config.params)
	var async = config.async

	if (method === 'POST') {
		xhttp.open('POST', url, async)
		xhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=utf-8')
		xhttp.send('info=' + params)
	} else if (method === 'GET') {
		url += '?' + 'info=' + params
		xhttp.open('GET', url, async)
		xhttp.send()
	}
	xhttp.onreadystatechange = function () {
		if (xhttp.readyState === 4 && xhttp.status === 200) {
			var data = xhttp.responseText
			cb(data)
		}
	}
}

module.exports = ajax;