function axios(options) {
let promise = new Promise((resolve, reject) => {
var xhr = new XMLHttpRequest();
var data = "";
//数据处理
for (var key in options.data) {
data += "&" + key + "=" + options.data[key]
}
if (options.method == "get") {
let url = options.url + "?" + data.slice(1);
xhr.open(options.method, url);
xhr.send();
} else if (options.method == "post") {
xhr.open(options.method, options.url);
xhr.setRequestHeader("content-type", "application/x-www-form-urlencoded");
xhr.send(data);
}
xhr.onreadystatechange = function () {
let timer = null;
let timeout = options.timeout?options.timeout:5000
if(xhr.readyState == 4 && xhr.status == 200){
let res = JSON.parse(xhr.responseText);
clearTimeout(timer);
resolve(res);
}
timer = setTimeout(()=>{
clearTimeout(timer);
reject(xhr.status);
},timeout)
}
})
return promise;
}