vue框架中的Axios封装

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;

}

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