Javascript 如何在项目中移动axios实例

我在一个express.js/node.js项目中使用Axios，并试图传递一个Axios实例

让我困惑的是，javascript中的东西是如何传递的，而很多事情并不是按照代码顺序进行的。有人能告诉我实现这一目标的正确方法吗？ 目前，我正在从Spotify的API请求一个令牌，然后使用该令牌创建一个Axios实例，以进一步调用Spotify

spotify-auth.js

const axios = require('axios').default;
let config = require('../../config');

var spotifyAxios = undefined;
console.log('this isnt logging');

axios.request({
    url: "/api/token",
    method: "post",
    baseURL: "https://accounts.spotify.com/",
    auth: {
        username: config.spotify_client_id,
        password: config.spotify_client_secret,
    },
    params: {
        "grant_type": "client_credentials",
    },
    headers: {
        "Accept": 'application/json',
        'Content-Type': 'application/x-www-form-urlencoded',
    }
}).then(res => {
    console.log(res.data);
    try {
        var token = res.data.access_token;
        spotifyAxios = axios.create({
            baseURL: 'https://api.spotify.com/v1/',
            timeout: 1200,
            headers: {'Authorization': 'Bearer'+token}
        });
        console.log("spotifyAxios created");
    }
    catch(err) {
        console.log(err);
        spotifyAxios = undefined;
    }
    
}, (err) => {
    console.log(err);
});

console.log('this isnt logging')
module.exports = spotifyAxios;

const axios = require('axios').default;
let config = require('../../config');

//var spotifyAxios = undefined;
console.log('this isnt logging');
async function spotifyAxios() {
    await axios.request({
        url: "/api/token",
        method: "post",
        baseURL: "https://accounts.spotify.com/",
        auth: {
            username: config.spotify_client_id,
            password: config.spotify_client_secret,
        },
        params: {
            "grant_type": "client_credentials",
        },
        headers: {
            "Accept": 'application/json',
            'Content-Type': 'application/x-www-form-urlencoded',
        }
    }).then(async res => {
        console.log(res.data);
        try {
            var token = res.data.access_token;
            return await axios.create({
                baseURL: 'https://api.spotify.com/v1/',
                timeout: 1200,
                headers: {'Authorization': 'Bearer'+token}
            });
            console.log("spotifyAxios created");
        }
        catch(err) {
            console.log(err);
            spotifyAxios = undefined;
        }
    
    }, (err) => {
        console.log(err);
    });
}

console.log('this isnt logging')
module.exports = spotifyAxios;

spotify.controller.js

const axios = require('axios').default;
const spotifyAxios = require('../services/spotify-auth');

exports.searchAlbum = function(req, res) {
    console.log(req.params);
    if (req.params.album == undefined) {
        res.status(400).send("searching string undefined");
        return;
    }

    try {
        spotifyAxios.request({
            method: 'get',
            url: 'https://api.spotify.com/v1/search',
            data: {
                q: req.params.album,
                type: "album",
            }
        }).then(res => {
            console.log(res);
        }, (err) => {
            console.log(err);
        });
    }
    catch(err) {
        console.log(err); // making the API call leads to error here because spotifyAxios isn't defined (undefined)
        res.status(500).send("unable to search albums");
    }    
}

const axios = require('axios').default;
const spotifyAxios = require('../services/spotify-auth');

exports.searchAlbum = async function(req, res) {
    console.log(req.params);
    if (req.params.album == undefined) {
        res.status(400).send("searching string undefined");
        return;
    }

    try {
        await spotifyAxios.request({
            method: 'get',
            url: 'https://api.spotify.com/v1/search',
            data: {
                q: req.params.album,
                type: "album",
            }
        }).then(res => {
            console.log(res);
        }, (err) => {
            console.log(err);
        });
    }
    catch(err) {
        console.log(err); // making the API call leads to error here because spotifyAxios isn't defined (undefined)
        res.status(500).send("unable to search albums");
    }    
}

---

我想试试这个，因为API调用是Asycronus

spotify-auth.js

const axios = require('axios').default;
let config = require('../../config');

var spotifyAxios = undefined;
console.log('this isnt logging');

axios.request({
    url: "/api/token",
    method: "post",
    baseURL: "https://accounts.spotify.com/",
    auth: {
        username: config.spotify_client_id,
        password: config.spotify_client_secret,
    },
    params: {
        "grant_type": "client_credentials",
    },
    headers: {
        "Accept": 'application/json',
        'Content-Type': 'application/x-www-form-urlencoded',
    }
}).then(res => {
    console.log(res.data);
    try {
        var token = res.data.access_token;
        spotifyAxios = axios.create({
            baseURL: 'https://api.spotify.com/v1/',
            timeout: 1200,
            headers: {'Authorization': 'Bearer'+token}
        });
        console.log("spotifyAxios created");
    }
    catch(err) {
        console.log(err);
        spotifyAxios = undefined;
    }
    
}, (err) => {
    console.log(err);
});

console.log('this isnt logging')
module.exports = spotifyAxios;

const axios = require('axios').default;
let config = require('../../config');

//var spotifyAxios = undefined;
console.log('this isnt logging');
async function spotifyAxios() {
    await axios.request({
        url: "/api/token",
        method: "post",
        baseURL: "https://accounts.spotify.com/",
        auth: {
            username: config.spotify_client_id,
            password: config.spotify_client_secret,
        },
        params: {
            "grant_type": "client_credentials",
        },
        headers: {
            "Accept": 'application/json',
            'Content-Type': 'application/x-www-form-urlencoded',
        }
    }).then(async res => {
        console.log(res.data);
        try {
            var token = res.data.access_token;
            return await axios.create({
                baseURL: 'https://api.spotify.com/v1/',
                timeout: 1200,
                headers: {'Authorization': 'Bearer'+token}
            });
            console.log("spotifyAxios created");
        }
        catch(err) {
            console.log(err);
            spotifyAxios = undefined;
        }
    
    }, (err) => {
        console.log(err);
    });
}

console.log('this isnt logging')
module.exports = spotifyAxios;

spotify.controller.js

const axios = require('axios').default;
const spotifyAxios = require('../services/spotify-auth');

exports.searchAlbum = function(req, res) {
    console.log(req.params);
    if (req.params.album == undefined) {
        res.status(400).send("searching string undefined");
        return;
    }

    try {
        spotifyAxios.request({
            method: 'get',
            url: 'https://api.spotify.com/v1/search',
            data: {
                q: req.params.album,
                type: "album",
            }
        }).then(res => {
            console.log(res);
        }, (err) => {
            console.log(err);
        });
    }
    catch(err) {
        console.log(err); // making the API call leads to error here because spotifyAxios isn't defined (undefined)
        res.status(500).send("unable to search albums");
    }    
}

const axios = require('axios').default;
const spotifyAxios = require('../services/spotify-auth');

exports.searchAlbum = async function(req, res) {
    console.log(req.params);
    if (req.params.album == undefined) {
        res.status(400).send("searching string undefined");
        return;
    }

    try {
        await spotifyAxios.request({
            method: 'get',
            url: 'https://api.spotify.com/v1/search',
            data: {
                q: req.params.album,
                type: "album",
            }
        }).then(res => {
            console.log(res);
        }, (err) => {
            console.log(err);
        });
    }
    catch(err) {
        console.log(err); // making the API call leads to error here because spotifyAxios isn't defined (undefined)
        res.status(500).send("unable to search albums");
    }    
}