node.js - 为什么这有效？ Spotify API 调用node.js

Question

我是 Node 新手，正在通过 Node.js 进行 API 调用，但我有点困惑为什么它会起作用。我已经通过 Node 轻松完成了其他 API 调用，因为很容易弄清楚如何定位各个字段等。但我从未获得与Spotify API 的链接，并且很困惑 data.tracks.items.artists.name 是如何给出的我是艺术家的名字？

我知道这是一个无知的问题，但我真的很想了解它是如何工作的，而不仅仅是让它发挥作用。

function song() {
var nodeArgs = process.argv;
var SongName = "";
for (var i = 3; i < nodeArgs.length; i++) {
    if (i > 3 && i < nodeArgs.length) {
        SongName = SongName + "+" + nodeArgs[i];
    }
    else {
        SongName += nodeArgs[i];
    }
}

var Spotify = require('node-spotify-api');
var spotify = new Spotify({
    id: "id",
    secret: "secret"
});

spotify.search({ type: 'track', query: SongName, limit: 1 }, function (err, data) {
    if (err) {
        SongName = "";
        console.log("Artist: " + songData.artists[0].name);
        console.log("Song Title: " + songData.name);
        console.log("Preview Track: " + songData.preview_url);
        console.log("Album: " + songData.album.name);
        song();
    }

    for (var i = 0; i < data.tracks.items.length; i++) {
        var songData = data.tracks.items[i];
        console.log("Artist: " + songData.artists[0].name);
        console.log("Song Title: " + songData.name);
        console.log("Preview Track: " + songData.preview_url);
        console.log("Album: " + songData.album.name);
    }
});
}

Answer 1

简短回答 -Track api 端点使用对象模型进行响应，该模型还包含艺术家对象 - 这是艺术家对象的数组，其中艺术家对象包含键名称。

引用:https://developer.spotify.com/documentation/web-api/reference/tracks/get-track/

来自他们的 API 文档

GET https://api.spotify.com/v1/tracks/{id}

响应对象包含

KEY VALUE       | TYPE                   | VALUE DESCRIPTION
---
artists         | an array of simplified | The artists who performed the track. 
                | artist objects         | information about the artist.                

艺术家对象

artist object (simplified)

KEY VALUE       | TYPE                   | VALUE DESCRIPTION
---
external_urls   | an external URL object | Known external URLs for this artist.
href            | string                 | A link to the Web API endpoint providing full details of the artist.
id              | string                 | The Spotify ID for the artist.
name            | string                 | The name of the artist
type            | string                 | The object type: "artist"
uri             | string                 | The Spotify URI for the artist.