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javascript - 将 async/await 应用于函数

问题描述

我一直在关注文档，但做得不对。有人可以看看我的代码，看看我做错了什么吗？

function getCookies(){

    var cookies = {
        art_rfp : '',
        art_token: '',
        hire_rfp: '',
        hire_token: '',
        corp_rfp: '',
        corp_token: '',
    }

    chrome.cookies.getAll({"url":"https://url.com"}, function (cookies) {
        var string = ''
        for(var i=0; i<cookies.length; i++){
            var name = cookies[i].name
            // console.log(name)
            if (name == 'a-sso_rfp') {
                console.log('ART- '+cookies[i].name+': '+cookies[i].value)
                cookies.art_rfp = cookies[i].value
            }
            else if (name == 'b-sso_token') {
                console.log('ART- '+cookies[i].name+': '+cookies[i].value)
                cookies.art_token = cookies[i].value
            }
            var value = cookies[i].value
            string += name+"="+value+"; "
        }
    });

    chrome.cookies.getAll({"url":"https://url2.com"}, function (cookies) {
        var string = ''
        for(var i=0; i<cookies.length; i++){
            var name = cookies[i].name

            if (name == 'a-sso_rfp') {
                console.log('HIRE- '+cookies[i].name+': '+cookies[i].value)
                cookies.hire_rfp = cookies[i].value
            }
            else if (name == 'b-sso_token') {
                console.log('HIRE- '+cookies[i].name+': '+cookies[i].value)
                cookies.hire_token = cookies[i].value
            }
        }
    });

    chrome.cookies.getAll({"url":"https://url3.com"}, function (cookies) {
        var string = ''
        for(var i=0; i<cookies.length; i++){
            var name = cookies[i].name
            if (name == 'e-sso_rfp') {
                console.log('CORP- '+cookies[i].name+': '+cookies[i].value)
                cookies.corp_rfp = cookies[i].value
            }
            else if (name == 'f-sso_token') {
                console.log('CORP- '+cookies[i].name+': '+cookies[i].value)
                cookies.corp_token = cookies[i].value
            }

        }
    });
    return cookies
}

function sendCookies(cookies){
    console.log(cookies)
}

console.log('this started')

async function run(){
    let cookies = await getCookies()
    let resposne = await sendCookies(cookies)
}

run()

当我打印cookies时sendCookies()，它会在浏览器获取 cookie 数据之前打印。我试图让它等到它完成。

标签： javascript

解决方案

您的getCookies()功能不是异步的。它进行一些异步调用 ( chrome.cookies.getAll())，但不等待结果，而是立即返回cookies对象。

您需要承诺电话，例如

const getAllCookiesPromisified = (url) => new Promise(resolve => { 
   chrome.cookies.getAll({url}, resolve);
});

const p1 = getAllCookiesPromisified("https://url.com");
const p2 = getAllCookiesPromisified("https://url2.com");

return Promise.all([p1, p2]);

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