es7 async await 报错

Question

用 async await 报错 ！

let getSid = function (){
    let result  = new Promise();
    let sid = sessionStorage.getItem('sid');
    if (!sid) {
        axios({
            method: "post",
            url: COMMON_URL + '/app/init',
        }).then(function(res) {
            sessionStorage.setItem('sid', res.data.sid);
            sid = res.data.sid;
            result.resolve(sid)
        });
    }else{
        result.resolve(sid)
    }
    return result;
}



export  async function axiosPost (url, data) {
    await getSid()

    data = qs.stringify(data)
    let result;
    
    let token = sessionStorage.getItem('token');
    let sid = sessionStorage.getItem('sid');
    if (token == null) {
        let isIngnore = location.pathname.indexOf(ingnoreRoute);
        if (isIngnore < 0) {
            location.href = '/account/login';
        }
    }
    result = axios({
        method: "post",
        data: data,
        url: COMMON_URL + url,
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded',
            'X-SID': sid,
            'X-TOKEN': token,
        },
    })

    return result;
}

Answer 1

自问自答，经常用then 但很少new Promise 参数传错了 - -

let getSid = function (){
    return new Promise(function(resolve,reject){
        let sid = sessionStorage.getItem('sid');
        if (!sid) {
            axios({
                method: "post",
                url: COMMON_URL + '/app/init',
            }).then(function(res) {
                sessionStorage.setItem('sid', res.data.sid);
                sid = res.data.sid;
                resolve(sid)
            });
        }else{
            resolve(sid)
        }
    });
}

Answer 2

你需要用回调的方式去resolve和reject。