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2023/01/112023/05/08

Fetch API と Django のクロスオリジンで気をつける事

個人的に開発する中で、localhost:8080 でホストしている javascript ファイルから localhost:8000 でホストしてる Django に対し HTTP リクエストをかけたところ、CORS (Cross Origin Resource Sharing) 関連のエラーが色々出ました。

色々調べながら解決しましたが、自分なりに分かりやすく整理したかったのでこの記事にまとめました。

Javascript からの HTTP リクエストには fetch API を使っています。

CORS (Cross Origin Resource Sharing) とは
Step 1: GET
Step 2: request に Cookie を含める
Step 3: POST や DELETE

CORS (Cross Origin Resource Sharing) とは

下記こちらからの抜粋です。

アプリケーションが読み込まれたのと同じオリジンに対してのみリソースのリクエストを行うことができ、それ以外のオリジンからの場合は正しい CORS ヘッダーを含んでいることが必要です。

オリジン間リソース共有の仕様は、ウェブブラウザーから情報を読み取ることを許可されているオリジンをサーバーが記述することができる、新たな HTTP ヘッダーを追加することで作用します。

Step 1: GET

まずは一番単純な GET から。Cookie も送らない想定です。

何もクロスオリジン対応をしていないと恐らく「No 'Access-Control-Allow-Origin' header is present on the requested resource.」という様なエラーが発生します。

クロスオリジンの request に対してサーバー側から Access-Control-Allow-Origin ヘッダーを適切に返す必要があります。

Fetch API での対応

Fetch API は普通に fetch() で request URL を叩けば大丈夫です。

let fetchResponse = await fetch(
    'http://localhost:8000/api/something'
)

メインはサーバー側（Django）での対応です。

Django での対応

django-cors-headers を pip install し、settings.py を下記のように追記して http://localhost:8080 からのリクエストを許可します。

pip install django-cors-headers

# settings.py

INSTALLED_APPS = [
   ...
   'corsheaders',
]

MIDDLEWARE = [
  ...
  'corsheaders.middleware.CorsMiddleware',
]

CORS_ALLOWED_ORIGINS = ['http://localhost:8080']

これでクロスオリジンの request を送れる様になります。（localhost:8080 → localhost:8000）

次に、request に cookie を含める設定を行います。

クロスオリジンでの fetch API は「デフォルトでは cookies を送信しない」仕様になっています。

これを解決するには fetch API の credentials パラメータを 'include' に設定し、サーバー側は Access-Control-Allow-Credentials ヘッダーを true で返す必要があります。

Fetch API での対応

fetch API のオプションに credentials: 'include' を含めます。

let fetchResponse = await fetch(
    'http://localhost:8000/api/something',
    {credentials: 'include'} // 追記分
)

Django での対応

settings.py に「CORS_ALLOW_CREDENTIALS = True」を追記します。

# settings.py
CORS_ALLOW_CREDENTIALS = True

これで Fetch API で Cookie が送れる様になり、Django 側もそれを受けられる様になりました。

Django でログイン済みのはずが AnonymousUser となる件

ちなみにログインユーザーを対象にした処理を Django 側で行う場合、上記の設定をしていないと、例えブラウザの cookie と Django の django_session テーブルで sessionid が一致していても 500 Internal Server Error や 403 Forbidden が発生すると思います。

理由は、クライアント側からの sessionid を request.COOKIES として受け取れていないため、request.user が非ログインユーザーを意味する AnonymousUser となるためです。

Step 3: POST や DELETE

さらに、クロスオリジンで POST や DELETE など unsafe な request を送る場合、クライアント側の fetch() に X-CSRFToken ヘッダーを設定し、Django 側では settings.py の CSRF_TRUSTED_ORIGINS のリストに request を許可するオリジンを記述する必要がります。

Fetch API での対応

let fetchResponse = await fetch(
    'http://localhost:8000/api/something',
    {credentials: 'include'},
    // ここから追記分
    method: 'POST',
    headers: {
        'X-CSRFToken': csrftoken, // Cookie から取得
        'Content-Type': 'application/json'
    },
    body: JSON.stringify({
        'someKey1': someData1,
        'someKey2': someData2
    }
)

GET メソッドは fetch のデフォルト値でしたが、POST や他のメソッドを使用する場合は method を指定する必要があります。

また、headers に X-CSRFToken として cookie から取得した csrftoken をアサインし、Content-Type も指定する必要があります。

Django での対応

settings.py の CSRF_TRUSTED_ORIGINS のリストに request を許可するオリジンを記述します。

# settings.py
CSRF_TRUSTED_ORIGINS = ['http://localhost:8080']

2023/01/112023/01/17

【Django】Apple MusicKit JS で Apple Music サインインの問題発生

事象
問題 1：「許可」ボタンクリックから進まない
問題 2：曲のフル再生ができない
問題 3：ポップアップ上でアプリが立ち上がる
その他メモ書き

事象

まず、MusicKit JS でプレイヤーを設置し曲をフル再生しようとすると Apple Music へのサインインが必要となります。

その際の正常なフローとしては：

自動ポップアップでサインイン画面が表示される
ユーザーID & パスワード、そして6 桁のワンタイムコードを入力してサインイン
- Mac の Safari では指紋認証のみでサインイン可
アプリケーション（オリジン毎）による Apple Music へのアクセス許可を求められる
「許可」ボタンのクリックするとポップアップ画面が閉じる
アプリケーションで曲のフルバージョンが再生できるようになる

今回、上記 4 の「許可」ボタンをクリックしてもボタンがグレーアウトされるだけで何も変わらない事象が起きた。

ポップアップウィンドウは閉じず、曲も再生されない。

もう一度曲を再生しようとしても再度別のポップアップが開いてサインインを要求されるという状況でした。

ちなみにサインインされてない状態だとフルバージョンではなく 30 秒バージョンの再生になります。

問題 1：「許可」ボタンクリックから進まない

まず、上記ステップで「許可」ボタンをクリックしてもボタンがグレーアウトするだけでその先に進まなかった問題から。

原因：Referrer-Policy の設定漏れ

諸々調べた結果、原因としてボタンクリック時の HTTP request に Referer 情報が含まれていなかった事が挙げられます。

Django ではデフォルトの Referrer-Policy が same-origin となりますが、same-origin の挙動は「同一オリジンのリクエストではオリジン、パス、クエリー文字列を送信します。オリジン間リクエストでは Referer ヘッダーを送信しません。」となっています。

つまり Apple の認証システムへの request 時に Referer ヘッダーが送信されず、その後の処理が行われなかったと思われます。

参考記事：MusicKit web 403 error issue

Django での Referrer-Policy 変更方法

Django で Referrer-Policy を変更するには settings.py で SECURE_REFERRER_POLICY を設定する必要があります。

おそらく「SECURE_REFERRER_POLICY = "strict-origin-when-cross-origin"」で良いと思います。

残る問題

これで「許可」ボタンをクリックすると、ポップアップウィンドウの中でアプリが表示されました。

仕方なくその中で曲を再生してみようとするとまた別のポップアップウィンドウが開きサインインを求められるループに入りました。

一旦グレーアウトで止まる問題は解消されましたが、別の問題が発生しただけです。

問題 2：曲のフル再生ができない

「許可」ボタンクリック後ポップアップウィンドウが閉じない問題はさておき、曲が再生できないのはなぜなのかを調べました。

原因 1/2：musicUserToken が付与されない

デベロッパーツールで request/response の内容を確認した結果、「許可」ボタンをクリックした際の Apple 側からの response で musicUserToken を受け取っているにもかかわらず、それがこちら側の musicKitInstance に渡っていないことが判明。

正常時はブラウザの Local Storage に保存され、無事認証が完了した musicKitInstance をデベロッパーツールで覗くと下記のように musicUserToken が入っているはずですが、今回はこれが「undefined」となっていました。

ちなみにコード上で半ば無理やり下記のようにアサインすると曲の再生ができていました。（music は musicKitInstance）

music.musicUserToken = "AoSKv/b0ED6YZzVuAEIvki4eOgFgeQYrCPaU+KSFV7fFdEozGUawOuKXxrzGyISRlHPfJlOzkclA+Nk4I0SbLI/f0tiZ++a+QYOG3EP+d935PvL+udndhJjfG/xe+ctry69X/rTtqgdr2VRCbqMgt/xzocg7gg2w/QPuTcA7YSpevglys3/2AsC69ofZKl8fHKkp04dyLuhxVZOC2h4PGXc+6chmnSHIxo7tp/VTv+IWr8+fhQ=="

原因 2/2：ポップアップ起動直前の URL が「#」で終わっている

正直かなり特殊な例かもしれませんが、自分のアプリ上、曲のタブを表示するボタンに a タグを使用し href="#" としていました。

つまり、曲を再生する前にこれをクリックするとメインウィンドウの URL が「http://localhost:8000/#」という形になりますが、これが良くなかったようです。

サインイン用のポップアップが開いて「許可」ボタンをクリックした後、ポップアップウィンドウの URL が更新されますが、その際メインウィンドウの URL と musicUserToken が「#」で繋がったものが入ります。

「http://localhost:8000/#ユーザートークン」の形で「#」につづけて musicUserToken が入ってくるんですが、上記で先に「#」が一つ入るため「http://localhost:8000/##ユーザートークン」という風に「#」が重複していました。

これが原因なのではと思い「#」を一つ消してブラウザ更新すると musicKitInstance に musicUserToken がアサインされ、URL からトークンの部分が消えました。（http://localhost:8000/ になる）

解決：URLに「#」を含まない様変更

アプリのコードを変更して「#」が付かないようにしたところ、「許可」ボタンクリックで musicUserToken は付与されるようになりました。

残る問題

ただ、メインウィンドウに戻らずポップアップ上にそのままアプリが表示される状況です。

その状態で曲はフル再生できますが、ポップアップが閉じてくれないのは問題です。

正直これに関しては解決できませんでした。

Django のテンプレートをそのまま Django の外に置いて python の http.server の Web サーバーで表示したところ無事にサインインできました。

なぜ内容が同じなのに Django で render されたものだとポップアップの挙動がおかしくなるのかは謎です。

と言うわけで、結局 html/css/js の部分は Django を通さず、API 部分だけ Django で書くことにしました。

それによってクロスオリジンのエラーを解決する必要がありましたが今のところ大丈夫そうです。

その他メモ書き

musicUserToken はオリジン毎の割り当て。
- 127.0.0.1:8000 で取得した musicUserToken は localhost:8000 には共有されない。
- 同じ http://127.0.0.1:8000 であれば http.server を使った html/js でも Django の runserver を使った Django テンプレートでも同じ musicUserToken で動く。

2022/12/142022/12/14

Javascript から Django REST Framework への POST/DELETE で 415 Unsupported Media Type

問題

Django REST Framework を使って API を作成中、Javascript から POST または DELETE リクエストを送ろうとした結果「POST（リクエスト先 URL） 415 (Unsupported Media Type)」のエラー表示。

*DELETE の場合も同じエラーが出ます。

原因

リクエストヘッダーに Content-Type がなかったのが原因。

解決方法

元々↓だったヘッダー部分に…

fetch('http://example.com/exampleapi',
    {
        method: 'POST',
        headers:{
            "X-CSRFToken": getCookie('csrftoken')
        body: JSON.stringify({ 'username': 'example'})
    }
)

↓の様に Content-Type を追加したら解決しました。

fetch('http://example.com/exampleapi',
    {
        method: 'POST',
        headers:{
            "X-CSRFToken": getCookie('csrftoken'),
            'Content-Type': 'application/json'} // 追記分
        body: JSON.stringify({ 'username': 'example'})
    }
)

DELETE の場合も同じ方法で解決しました。

2022/12/122022/12/14

Javascript から Django REST Framework への POST/DELETE で 403 Forbidden

問題

Django REST Framework を使って API を作成中、Javascript から POST または DELETE リクエストを送ろうとした結果「POST（リクエスト先 URL） 403 (Forbidden)」のエラー表示。

*DELETE の場合も同じエラーが出ます。

原因

CRSF (Cross Site Request Forgery) に対するセキュリティが働いて、リクエストが拒否されている様子。

解決法

ブラウザのクッキーから CSRF Token を取って、POST リクエストのヘッダーに含めたら解決しました。

元々↓だったところに…

const fetchOptions = {
    method: 'POST'
}
fetch('http://example.com/exampleapi',fetchOptions)

クッキーから csfrtoken を抽出して headers に含めて POST リクエストをする様にしました。

function getCookie(name) {
    let cookieValue = null;
    if (document.cookie && document.cookie !== '') {
        const cookies = document.cookie.split(';');
        for (let i = 0; i < cookies.length; i++) {
                const cookie = cookies[i].trim();
                if (cookie.substring(0, name.length + 1) === (name + '=')) {
                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                break;
            }
        }
    }
    return cookieValue;
}

const fetchOptions = {
    method: 'POST',
    headers:{"X-CSRFToken": getCookie('csrftoken')}
}
fetch('http://example.com/exampleapi',fetchOptions)

これで一応 POST リクエストが通る様になりました。（HTTP Status 200 が返ってきました。）

DELETE の場合も同じ方法で解決しました。

参考にした記事

2022/12/092023/01/18

【Django】カスタム User モデルの作成方法

Django プロジェクトを作る際、もしデフォルトの User モデルで機能が足りている場合でも、将来の保守性や変更の必要性が出た場合を考慮して、カスタムの User モデルを使用することが強く推奨されています。

また、この作業 Django プロジェクトを作成して最初の migrate 実行前に行う必要があります。

ユーザー管理用アプリケーションの作成
カスタム User モデルの作成
カスタム User モデルの登録
マイグレーション

参考資料

Customizing authentication in Django

ユーザー管理用アプリケーションの作成

account という名前でアプリケーションを作ります。

% python manage.py startapp account

# settings.py

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'account.apps.AccountConfig', # 追記
]

カスタム User モデルの作成

# account/models.py

from django.contrib.auth.models import AbstractUser

class User(AbstractUser):
    pass

カスタム User モデルの登録

# settings.py

AUTH_USER_MODEL = 'account.User'

尚、この設定をした時の注意点として、django.contrib.auth.models の User を直接参照すると AUTH_USER_MODEL で設定した User モデルを参照できないそうです。

なので User モデルを参照する必要がある場合は django.contrib.auth.get_user_model() を使用する必要があります。

# account/admin.py

from django.contrib import admin
from django.contrib.auth.admin import UserAdmin
from .models import User # models.py のカスタム User をインポート

admin.site.register(User, UserAdmin)

マイグレーション

まず、新たに作成した「account」アプリケーションのマイグレーションを作成します。

% python manage.py makemigrations account
Migrations for 'account':
  account/migrations/0001_initial.py
    - Create model User

マイグレーションを実行します。

% python manage.py migrate
Operations to perform:
  Apply all migrations: account, admin, auth, contenttypes, sessions
Running migrations:
  Applying contenttypes.0001_initial... OK
  Applying contenttypes.0002_remove_content_type_name... OK
  Applying auth.0001_initial... OK
  Applying auth.0002_alter_permission_name_max_length... OK
  Applying auth.0003_alter_user_email_max_length... OK
  Applying auth.0004_alter_user_username_opts... OK
  Applying auth.0005_alter_user_last_login_null... OK
  Applying auth.0006_require_contenttypes_0002... OK
  Applying auth.0007_alter_validators_add_error_messages... OK
  Applying auth.0008_alter_user_username_max_length... OK
  Applying auth.0009_alter_user_last_name_max_length... OK
  Applying auth.0010_alter_group_name_max_length... OK
  Applying auth.0011_update_proxy_permissions... OK
  Applying auth.0012_alter_user_first_name_max_length... OK
  Applying account.0001_initial... OK
  Applying admin.0001_initial... OK
  Applying admin.0002_logentry_remove_auto_add... OK
  Applying admin.0003_logentry_add_action_flag_choices... OK
  Applying sessions.0001_initial... OK

無事マイグレーション完了です。

2022/12/082022/12/09

Python 仮想環境の作成

任意の場所に Python 仮想環境を作成、起動します。

% python3 -m venv justjam
% cd justjam
% source bin/activate

Django プロジェクト＆アプリケーションの作成

仮想環境内で django をインストール、そしてプロジェクトとアプリケーションを作成します。

% pip install --upgrade pip
% pip install django
% django-admin startproject justjam_proj
% cd justjam_proj
% python manage.py startapp api

# settings.py

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'api.apps.ApiConfig', # 追記分
]

runserver を実行し、ブラウザで動作確認します。

% python manage.py runserver

MySQL へ初回 migrate

注）カスタムユーザーモデルを使用する場合は、以下のステップに進む前に設定を完了しておく必要があります。

settings.py の DATABASES を変更し MySQL 対応にします。

# settings.py
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'justjam',
    }
}

MySQL でデータベースを作成し、migrate を実行します。

% mysql
mysql> create database justjam;
mysql> exit
% pip install mysql
% python manage.py migrate

Django のテーブルが作成されていることを確認します。

% mysql
mysql> show tables
    -> ;
+----------------------------+
| Tables_in_justjam          |
+----------------------------+
| auth_group                 |
| auth_group_permissions     |
| auth_permission            |
| auth_user                  |
| auth_user_groups           |
| auth_user_user_permissions |
| django_admin_log           |
| django_content_type        |
| django_migrations          |
| django_session             |
+----------------------------+
10 rows in set (0.00 sec)

mysql> exit;

管理ユーザーの作成

% python manage.py createsuperuser
Username (leave blank to use 'username'): admin
Email address: admin@justjam.com
Password: 
Password (again): 
Superuser created successfully.

2022/11/242022/11/24

Apple MusicKit JS で簡単な音楽プレーヤーを作ってみる

Apple の MusicKit JS を使って、とりあえず簡単な音楽プレーヤーを作ってみます。

その前段階として Developer Token を作成してください。下記が参考になれば幸いです。

というわけで作ったのが下記の html ファイル。「Your Developer Token」となっている部分を自身で作成したものに置換すれば動くと思います。

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />

<title>MusicKit JS</title>
</head>
<body>
<center>
    <p><img id="artwork"/></p>
    <p id="media-item-title">Display Media Item Title here</p>
    <p id="album-title">Display Album Title here</p>
    <p id="artist-name">Display Artist Name here</p>
    <p id="playback-time">Display Playback Time here</p>
    <p><button id="play">Play</button><button id="pause">Pause</button></p>
    <p><button id="previous-item">Previous</button><button id="next-item">Next</button></p>
</center>

<script src="https://js-cdn.music.apple.com/musickit/v1/musickit.js"></script>
<script type="text/javascript">
    // MusicKit JS の Promise を作成
    const setupMusicKit = new Promise((resolve) => {
        document.addEventListener('musickitloaded', function () {
            // MusicKit を定義
            MusicKit.configure({
                developerToken: 'Your Developer Token',
                app: {
                    name: 'My MusicKit JS App',
                    build: '2022.11.14'
                }
            })
            // MusicKit のインスタンスで Promise を resolve
            resolve(MusicKit.getInstance())
        })
    });

    // MusicKit.configure() が完了するのを待って残りを実行
    setupMusicKit.then(async (music) => {

        // 再生中の曲の情報を表示する HTML 要素を取得
        let currentSongName = document.getElementById('media-item-title');
        let currentAlbumName = document.getElementById('album-title');
        let currentArtistName = document.getElementById('artist-name');
        let playbackTime = document.getElementById('playback-time');

        // playbackTimeDidChange をトリガーにして再生時間の表示を更新
        music.addEventListener('playbackTimeDidChange', () => {
            playbackTime.textContent = music.player.currentPlaybackTime
        });

        // mediaItemDidChange をトリガーにして再生中の曲名の表示を更新
        music.addEventListener('mediaItemDidChange', () => {
            currentSongName.textContent = music.player.nowPlayingItem.title
        });

        // Play ボタンと player.play() の紐付け
        let playButton = document.getElementById('play');
        playButton.addEventListener('click', async () => {
            await music.player.play();
            // 曲を再生しつつ、紐づく情報の表示を更新
            currentAlbumName.textContent = music.player.nowPlayingItem.albumName
            currentArtistName.textContent = music.player.nowPlayingItem.artistName
        });

        // Pause ボタンと player.pause() の紐付け
        let pauseButton = document.getElementById('pause');
        pauseButton.addEventListener('click', () => {
            music.player.pause();
        });

        // Previous ボタンと player.skipToPreviousItem() の紐付け
        let previousButton = document.getElementById('previous-item');
        previousButton.addEventListener('click', () => {
            music.player.skipToPreviousItem();
        });

        // Next ボタンと player.skipToNextItem() の紐付け
        let nextButton = document.getElementById('next-item');
        nextButton.addEventListener('click', () => {
            music.player.skipToNextItem();
        });

        // アルバムを再生 Queue に登録
        await music.setQueue({
            album: '1542182291' // アルバム ID を渡す
        })

        // アルバム情報取得のプロミス
        let albumInfoPromise = music.api.album(1542182291)
        albumInfoPromise.then((albumData) => {
            let artworkImg = document.getElementById('artwork')
            // アルバムアートの URL を取得
            let artworkURL = MusicKit.formatArtworkURL(albumData.attributes.artwork, 100, 100)
            // アルバムアートを表示
            artworkImg.setAttribute('src', artworkURL)
        })
    })
</script>
</body>
</html>

大事なのは下記の記述で MusicKit JS を読み込んでいるところと。。。

<script src="https://js-cdn.music.apple.com/musickit/v1/musickit.js"></script>

下記の様な感じで MusicKit インスタンスの Promise を作っているところ。

    // MusicKit JS の Promise を作成
    const setupMusicKit = new Promise((resolve) => {
        document.addEventListener('musickitloaded', function () {
            // MusicKit を定義
            MusicKit.configure({
                developerToken: 'Your Developer Token',
                app: {
                    name: 'My MusicKit JS App',
                    build: '2022.11.14'
                }
            })
            // MusicKit のインスタンスで Promise を resolve
            resolve(MusicKit.getInstance())
        })
    });

この辺りは色々やり方があるんだと思いますが、とりあえず「musickitloaded」のイベントを待って MusicKit.configure() を実行する必要があります。

あとは公式ドキュメントを見ながら色々遊べればと。。。

ちなみに Apple Music API という、アルバムや楽曲などの情報の取得を主とした API もありますが、MusicKit API の MusicKit.API クラスがその役割を担っています。

2022/11/092022/11/24

curl で Apple Music API に検索をかける

取り急ぎ curl でアーティストや楽曲の検索を試してみたいと思います。

前提として Apple Music API の Developer Token を持っている必要があります。

よければ下記も参考にしてください。

では順にいきます。

アーティスト名で検索
アルバム ID で検索
楽曲 ID で検索
曲名で検索
おまけ - シングル版「今夜月の見える丘に」

1. アーティスト名で検索

まずは Apple 公式ドキュメントを参考にしつつアーティスト名「B'z」を検索します。URL は下記とします。

「https://api.music.apple.com/v1/catalog/jp/search?term=B'z&types=artists」

その上でリクエストヘッダーにデベロッパートークンを追加して、curl を実行します。

% curl -s -H 'Authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB' "https://api.music.apple.com/v1/catalog/jp/search?term=B'z&types=artists"

で、返ってきたのがこちら。

{
    "results": {
        "artists": {
            "href": "/v1/catalog/jp/search?limit=5&term=B%27z&types=artists",
            "next": "/v1/catalog/jp/search?offset=5&term=B%27z&types=artists",
            "data": [
                {
                    "id": "74931253",
                    "type": "artists",
                    "href": "/v1/catalog/jp/artists/74931253",
                    "attributes": {
                        "name": "B'z",
                        "genreNames": [
                            "ロック"
                        ],
                        "artwork": {
                            "width": 2400,
                            "height": 2400,
                            "url": "https://is5-ssl.mzstatic.com/image/thumb/Music122/v4/0c/88/58/0c885888-c769-81f8-8485-069cd9a362f1/pr_source.png/{w}x{h}bb.jpg",
                            "bgColor": "dcdfe6",
                            "textColor1": "000001",
                            "textColor2": "1b191e",
                            "textColor3": "2c2c2f",
                            "textColor4": "424046"
                        },
                        "url": "https://music.apple.com/jp/artist/bz/74931253"
                    },
                    "relationships": {
                        "albums": {
                            "href": "/v1/catalog/jp/artists/74931253/albums",
                            "next": "/v1/catalog/jp/artists/74931253/albums?offset=25",
                            "data": [
                                {
                                    "id": "283000073",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/283000073"
                                },
                                {
                                    "id": "292067907",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/292067907"
                                },
                                {
                                    "id": "666625900",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/666625900"
                                },
                                {
                                    "id": "75682683",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75682683"
                                },
                                {
                                    "id": "1561574089",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1561574089"
                                },
                                {
                                    "id": "74937562",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/74937562"
                                },
                                {
                                    "id": "666634430",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/666634430"
                                },
                                {
                                    "id": "75681798",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75681798"
                                },
                                {
                                    "id": "1605118558",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1605118558"
                                },
                                {
                                    "id": "75356318",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75356318"
                                },
                                {
                                    "id": "1466937136",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1466937136"
                                },
                                {
                                    "id": "74933581",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/74933581"
                                },
                                {
                                    "id": "75682153",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75682153"
                                },
                                {
                                    "id": "347013256",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/347013256"
                                },
                                {
                                    "id": "74935606",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/74935606"
                                },
                                {
                                    "id": "75354662",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75354662"
                                },
                                {
                                    "id": "1325460835",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1325460835"
                                },
                                {
                                    "id": "454667912",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/454667912"
                                },
                                {
                                    "id": "297710855",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/297710855"
                                },
                                {
                                    "id": "1561701429",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1561701429"
                                },
                                {
                                    "id": "74944705",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/74944705"
                                },
                                {
                                    "id": "1567851939",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1567851939"
                                },
                                {
                                    "id": "75361124",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75361124"
                                },
                                {
                                    "id": "1567852104",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1567852104"
                                },
                                {
                                    "id": "75357159",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75357159"
                                }
                            ]
                        }
                    }
                },
                {
                    "id": "1236215587",
                    "type": "artists",
                    "href": "/v1/catalog/jp/artists/1236215587",
                    "attributes": {
                        "name": "BZ",
                        "genreNames": [
                            "ヒップホップ／ラップ"
                        ],
                        "artwork": {
                            "width": 3000,
                            "height": 3000,
                            "url": "https://is3-ssl.mzstatic.com/image/thumb/Music124/v4/ae/b6/fb/aeb6fb97-56ba-e8fd-083f-f8c21970a74f/artwork.jpg/{w}x{h}ac.jpg",
                            "bgColor": "0f1050",
                            "textColor1": "d6bcf7",
                            "textColor2": "9dafdf",
                            "textColor3": "ae99d5",
                            "textColor4": "818fc2"
                        },
                        "url": "https://music.apple.com/jp/artist/bz/1236215587"
                    },
                    "relationships": {
                        "albums": {
                            "href": "/v1/catalog/jp/artists/1236215587/albums",
                            "data": [
                                {
                                    "id": "1612269170",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1612269170"
                                },
                                {
                                    "id": "1552528987",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1552528987"
                                },
                                {
                                    "id": "1170604377",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1170604377"
                                },
                                {
                                    "id": "1344358078",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1344358078"
                                },
                                {
                                    "id": "1501353949",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1501353949"
                                },
                                {
                                    "id": "1551034513",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1551034513"
                                },
                                {
                                    "id": "1502686217",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1502686217"
                                },
                                {
                                    "id": "1502573665",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1502573665"
                                },
                                {
                                    "id": "1544732805",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1544732805"
                                },
                                {
                                    "id": "1536654657",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1536654657"
                                },
                                {
                                    "id": "1549103433",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1549103433"
                                },
                                {
                                    "id": "1375096721",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1375096721"
                                },
                                {
                                    "id": "1561406752",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1561406752"
                                },
                                {
                                    "id": "1597875079",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1597875079"
                                },
                                {
                                    "id": "1566648690",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1566648690"
                                },
                                {
                                    "id": "1503527043",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1503527043"
                                },
                                {
                                    "id": "1448546746",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1448546746"
                                },
                                {
                                    "id": "1644747159",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1644747159"
                                },
                                {
                                    "id": "1629986398",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1629986398"
                                },
                                {
                                    "id": "1619147046",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1619147046"
                                },
                                {
                                    "id": "1606159561",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1606159561"
                                },
                                {
                                    "id": "1582431314",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1582431314"
                                }
                            ]
                        }
                    }
                },
                {
                    "id": "1465740891",
                    "type": "artists",
                    "href": "/v1/catalog/jp/artists/1465740891",
                    "attributes": {
                        "name": "BZ",
                        "genreNames": [
                            "エレクトロニック"
                        ],
                        "artwork": {
                            "width": 500,
                            "height": 500,
                            "url": "https://is3-ssl.mzstatic.com/image/thumb/Features125/v4/9e/da/50/9eda50fb-495d-62dd-473e-7e5ad83209f7/pr_source.png/{w}x{h}bb.jpg",
                            "bgColor": "1a1615",
                            "textColor1": "f6c069",
                            "textColor2": "d8a971",
                            "textColor3": "ca9e58",
                            "textColor4": "b28c5e"
                        },
                        "url": "https://music.apple.com/jp/artist/bz/1465740891"
                    },
                    "relationships": {
                        "albums": {
                            "href": "/v1/catalog/jp/artists/1465740891/albums",
                            "data": [
                                {
                                    "id": "838262440",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/838262440"
                                },
                                {
                                    "id": "997882538",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/997882538"
                                },
                                {
                                    "id": "964660751",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/964660751"
                                },
                                {
                                    "id": "1212786159",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1212786159"
                                },
                                {
                                    "id": "1579770371",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1579770371"
                                }
                            ]
                        }
                    }
                },
                {
                    "id": "1585689464",
                    "type": "artists",
                    "href": "/v1/catalog/jp/artists/1585689464",
                    "attributes": {
                        "name": "BZ",
                        "genreNames": [
                            "エレクトロニック"
                        ],
                        "artwork": {
                            "width": 4000,
                            "height": 4000,
                            "url": "https://is5-ssl.mzstatic.com/image/thumb/Music122/v4/ac/09/ab/ac09ab8c-1707-c6aa-a45e-9074649456f0/5059722847474_cover.jpg/{w}x{h}ac.jpg",
                            "bgColor": "03242f",
                            "textColor1": "d0cecc",
                            "textColor2": "21b9d9",
                            "textColor3": "a7acac",
                            "textColor4": "1b9bb7"
                        },
                        "url": "https://music.apple.com/jp/artist/bz/1585689464"
                    },
                    "relationships": {
                        "albums": {
                            "href": "/v1/catalog/jp/artists/1585689464/albums",
                            "data": [
                                {
                                    "id": "776208953",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/776208953"
                                },
                                {
                                    "id": "1612158034",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1612158034"
                                },
                                {
                                    "id": "1571657950",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1571657950"
                                },
                                {
                                    "id": "1581841967",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1581841967"
                                },
                                {
                                    "id": "1577141561",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1577141561"
                                },
                                {
                                    "id": "1577141651",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1577141651"
                                },
                                {
                                    "id": "1583900522",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1583900522"
                                },
                                {
                                    "id": "1620727001",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1620727001"
                                },
                                {
                                    "id": "1584610904",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1584610904"
                                }
                            ]
                        }
                    }
                },
                {
                    "id": "303385174",
                    "type": "artists",
                    "href": "/v1/catalog/jp/artists/303385174",
                    "attributes": {
                        "name": "BZ",
                        "genreNames": [
                            "ヒップホップ／ラップ"
                        ],
                        "artwork": {
                            "width": 996,
                            "height": 996,
                            "url": "https://is1-ssl.mzstatic.com/image/thumb/Music112/v4/81/ef/b0/81efb079-e993-f42a-cfe1-6ece22673a2f/pr_source.png/{w}x{h}bb.jpg",
                            "bgColor": "1f1c2d",
                            "textColor1": "c7cea4",
                            "textColor2": "d0ba8c",
                            "textColor3": "a6ab8c",
                            "textColor4": "ad9a79"
                        },
                        "url": "https://music.apple.com/jp/artist/bz/303385174"
                    },
                    "relationships": {
                        "albums": {
                            "href": "/v1/catalog/jp/artists/303385174/albums",
                            "data": [
                                {
                                    "id": "1447921556",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1447921556"
                                },
                                {
                                    "id": "1637062769",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1637062769"
                                },
                                {
                                    "id": "1517197555",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1517197555"
                                },
                                {
                                    "id": "1614079632",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1614079632"
                                },
                                {
                                    "id": "1558826365",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1558826365"
                                },
                                {
                                    "id": "1609298956",
                                    "type": "albums* Connection #0 to host api.music.apple.com left intact",
                                    "href": "/v1/catalog/jp/albums/1609298956"
                                },
                                {
                                    "id": "1584989196",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1584989196"
                                },
                                {
                                    "id": "1522129749",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1522129749"
                                },
                                {
                                    "id": "1648328595",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1648328595"
                                },
                                {
                                    "id": "1635988163",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1635988163"
                                }
                            ]
                        }
                    }
                }
            ]
        }
    },
    "meta": {
        "results": {
            "order": [
                "artists"
            ],
            "rawOrder": [
                "artists"
            ]
        }
    }

2. アルバム ID で検索

次に、上記で取得した情報の中からアルバム ID 「283000073」をキーにしてアルバムの情報を取得します。

また Apple 公式ドキュメントを参考に、URL を「https://api.music.apple.com/v1/catalog/jp/albums/283000073」としました。

% curl -s -H 'Authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB' "https://api.music.apple.com/v1/catalog/jp/albums/283000073"

で、返ってきた内容が下記の通りです。

アルバムのジャンルや、楽曲の順番、複数ディスクの場合のディスク番号、個別の楽曲のリリース日なども含まれています。

{
    "data": [
        {
            "id": "283000073",
            "type": "albums",
            "href": "/v1/catalog/jp/albums/283000073",
            "attributes": {
                "copyright": "℗ VERMILLION RECORDS",
                "genreNames": [
                    "ロック",
                    "ミュージック",
                    "J-Pop",
                    "ワールド ",
                    "J ポップ",
                    "アフリカ",
                    "アフロビート",
                    "サウンドトラック",
                    "サウンドトラック",
                    "ポップ",
                    "ポップ / ロック"
                ],
                "releaseDate": "2008-06-18",
                "upc": "4582283790893",
                "isMasteredForItunes": false,
                "artwork": {
                    "width": 2400,
                    "height": 2400,
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                            "id": "283000197",
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                            "href": "/v1/catalog/jp/songs/283000197",
                            "attributes": {
                                "albumName": "B'z The Best “ULTRA Pleasure”",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop",
                                    "ワールド ",
                                    "J ポップ",
                                    "サウンドトラック",
                                    "サウンドトラック",
                                    "ポップ",
                                    "ポップ / ロック",
                                    "アフリカ",
                                    "アフロビート"
                                ],
                                "trackNumber": 7,
                                "releaseDate": "2003-03-26",
                                "durationInMillis": 237883,
                                "isrc": "JPBM00805022",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "b31319",
                                    "textColor1": "fff9f9",
                                    "textColor2": "e3cccd",
                                    "textColor3": "efcbcc",
                                    "textColor4": "daa7a9"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/its-showtime/283000073?i=283000197",
                                "playParams": {
                                    "id": "283000197",
                                    "kind": "song"
                                },
                                "discNumber": 2,
                                "hasLyrics": true,
                                "isAppleDigitalMaster": false,
                                "name": "IT'S SHOWTIME!!",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/48/9d/10/489d1068-0539-32b0-3a58-84feb1c6c966/mzaf_2514394422699192888.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        },
                        {
                            "id": "283000199",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/283000199",
                            "attributes": {
                                "albumName": "B'z The Best “ULTRA Pleasure”",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop",
                                    "ワールド ",
                                    "J ポップ",
                                    "サウンドトラック",
                                    "サウンドトラック",
                                    "ポップ",
                                    "ポップ / ロック",
                                    "アフリカ",
                                    "アフロビート"
                                ],
                                "trackNumber": 8,
                                "releaseDate": "2004-05-05",
                                "durationInMillis": 227215,
                                "isrc": "JPBM00805023",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "b31319",
                                    "textColor1": "fff9f9",
                                    "textColor2": "e3cccd",
                                    "textColor3": "efcbcc",
                                    "textColor4": "daa7a9"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/banzai/283000073?i=283000199",
                                "playParams": {
                                    "id": "283000199",
                                    "kind": "song"
                                },
                                "discNumber": 2,
                                "hasLyrics": true,
                                "isAppleDigitalMaster": false,
                                "name": "BANZAI",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/5b/f0/5a/5bf05af4-5795-908a-9327-a84b9bf0344d/mzaf_4118405068698009331.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        },
                        {
                            "id": "283000203",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/283000203",
                            "attributes": {
                                "albumName": "B'z The Best “ULTRA Pleasure”",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop",
                                    "ワールド ",
                                    "J ポップ",
                                    "サウンドトラック",
                                    "サウンドトラック",
                                    "アフリカ",
                                    "アフロビート",
                                    "ポップ",
                                    "ポップ / ロック"
                                ],
                                "trackNumber": 9,
                                "releaseDate": "2005-03-09",
                                "durationInMillis": 261980,
                                "isrc": "JPBM00805024",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "b31319",
                                    "textColor1": "fff9f9",
                                    "textColor2": "e3cccd",
                                    "textColor3": "efcbcc",
                                    "textColor4": "daa7a9"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/%E6%84%9B%E3%81%AE%E3%83%90%E3%82%AF%E3%83%80%E3%83%B3/283000073?i=283000203",
                                "playParams": {
                                    "id": "283000203",
                                    "kind": "song"
                                },
                                "discNumber": 2,
                                "hasLyrics": true,
                                "isAppleDigitalMaster": false,
                                "name": "愛のバクダン",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview114/v4/38/56/42/38564277-e3c7-8892-4a38-363e02982c1c/mzaf_7931602334840061919.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        },
                        {
                            "id": "283000206",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/283000206",
                            "attributes": {
                                "albumName": "B'z The Best “ULTRA Pleasure”",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop",
                                    "ワールド ",
                                    "J ポップ",
                                    "サウンドトラック",
                                    "サウンドトラック",
                                    "ポップ",
                                    "ポップ / ロック",
                                    "アフリカ",
                                    "アフロビート"
                                ],
                                "trackNumber": 10,
                                "releaseDate": "2005-08-10",
                                "durationInMillis": 325198,
                                "isrc": "JPBM00805025",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "b31319",
                                    "textColor1": "fff9f9",
                                    "textColor2": "e3cccd",
                                    "textColor3": "efcbcc",
                                    "textColor4": "daa7a9"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/ocean/283000073?i=283000206",
                                "playParams": {
                                    "id": "283000206",
                                    "kind": "song"
                                },
                                "discNumber": 2,
                                "hasLyrics": true,
                                "isAppleDigitalMaster": false,
                                "name": "OCEAN",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/13/79/e4/1379e4b2-135a-82d9-89d4-62c76ba9d7a5/mzaf_4622046857049795843.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        },
                        {
                            "id": "283000209",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/283000209",
                            "attributes": {
                                "albumName": "B'z The Best “ULTRA Pleasure”",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop",
                                    "ワールド ",
                                    "J ポップ",
                                    "アフリカ",
                                    "アフロビート",
                                    "サウンドトラック",
                                    "サウンドトラック",
                                    "ポップ",
                                    "ポップ / ロック"
                                ],
                                "trackNumber": 11,
                                "releaseDate": "2006-01-25",
                                "durationInMillis": 193303,
                                "isrc": "JPBM00805026",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "b31319",
                                    "textColor1": "fff9f9",
                                    "textColor2": "e3cccd",
                                    "textColor3": "efcbcc",
                                    "textColor4": "daa7a9"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/%E8%A1%9D%E5%8B%95/283000073?i=283000209",
                                "playParams": {
                                    "id": "283000209",
                                    "kind": "song"
                                },
                                "discNumber": 2,
                                "hasLyrics": true,
                                "isAppleDigitalMaster": false,
                                "name": "衝動",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/f1/eb/19/f1eb1939-26de-6146-c12d-57e6ae0b96f2/mzaf_6872363229656617418.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        },
                        {
                            "id": "283000211",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/283000211",
                            "attributes": {
                                "albumName": "B'z The Best “ULTRA Pleasure”",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop",
                                    "ワールド ",
                                    "J ポップ",
                                    "アフリカ",
                                    "アフロビート",
                                    "サウンドトラック",
                                    "サウンドトラック",
                                    "ポップ",
                                    "ポップ / ロック"
                                ],
                                "trackNumber": 12,
                                "releaseDate": "2006-06-07",
                                "durationInMillis": 211403,
                                "isrc": "JPBM00805027",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "b31319",
                                    "textColor1": "fff9f9",
                                    "textColor2": "e3cccd",
                                    "textColor3": "efcbcc",
                                    "textColor4": "daa7a9"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/splash/283000073?i=283000211",
                                "playParams": {
                                    "id": "283000211",
                                    "kind": "song"
                                },
                                "discNumber": 2,
                                "hasLyrics": true,
                                "isAppleDigitalMaster": false,
                                "name": "SPLASH!",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview114/v4/dd/8a/f9/dd8af95a-d7f8-9267-42f0-5a4ec7035be0/mzaf_1072998915713595128.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        },
                        {
                            "id": "283000215",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/283000215",
                            "attributes": {
                                "albumName": "B'z The Best “ULTRA Pleasure”",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop",
                                    "ワールド ",
                                    "J ポップ",
                                    "サウンドトラック",
                                    "サウンドトラック",
                                    "ポップ",
                                    "ポップ / ロック",
                                    "アフリカ",
                                    "アフロビート"
                                ],
                                "trackNumber": 13,
                                "releaseDate": "2007-05-09",
                                "durationInMillis": 306787,
                                "isrc": "JPBM00805028",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "b31319",
                                    "textColor1": "fff9f9",
                                    "textColor2": "e3cccd",
                                    "textColor3": "efcbcc",
                                    "textColor4": "daa7a9"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/%E6%B0%B8%E9%81%A0%E3%81%AE%E7%BF%BC/283000073?i=283000215",
                                "playParams": {
                                    "id": "283000215",
                                    "kind": "song"
                                },
                                "discNumber": 2,
                                "hasLyrics": true,
                                "isAppleDigitalMaster": false,
                                "name": "永遠の翼",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/fa/de/4c/fade4cd6-4a5c-7b28-257a-d8da822461ed/mzaf_559845820496670159.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        },
                        {
                            "id": "283000218",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/283000218",
                            "attributes": {
                                "albumName": "B'z The Best “ULTRA Pleasure”",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop",
                                    "ワールド ",
                                    "J ポップ",
                                    "アフリカ",
                                    "アフロビート",
                                    "サウンドトラック",
                                    "サウンドトラック",
                                    "ポップ",
                                    "ポップ / ロック"
                                ],
                                "trackNumber": 14,
                                "releaseDate": "2007-10-03",
                                "durationInMillis": 238469,
                                "isrc": "JPBM00805029",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "b31319",
                                    "textColor1": "fff9f9",
                                    "textColor2": "e3cccd",
                                    "textColor3": "efcbcc",
                                    "textColor4": "daa7a9"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/super-love-song/283000073?i=283000218",
                                "playParams": {
                                    "id": "283000218",
                                    "kind": "song"
                                },
                                "discNumber": 2,
                                "hasLyrics": true,
                                "isAppleDigitalMaster": false,
                                "name": "SUPER LOVE SONG",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/bc/f1/bc/bcf1bc26-1be6-c7bc-e0a3-2a7f971bb02c/mzaf_8776164769843508828.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        },
                        {
                            "id": "283000222",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/283000222",
                            "attributes": {
                                "albumName": "B'z The Best “ULTRA Pleasure”",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop",
                                    "ワールド ",
                                    "J ポップ",
                                    "ポップ",
                                    "ポップ / ロック",
                                    "アフリカ",
                                    "アフロビート",
                                    "サウンドトラック",
                                    "サウンドトラック"
                                ],
                                "trackNumber": 15,
                                "releaseDate": "1991-03-27",
                                "durationInMillis": 285756,
                                "isrc": "JPBM00805030",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "b31319",
                                    "textColor1": "fff9f9",
                                    "textColor2": "e3cccd",
                                    "textColor3": "efcbcc",
                                    "textColor4": "daa7a9"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/pleasure-2008-%E4%BA%BA%E7%94%9F%E3%81%AE%E5%BF%AB%E6%A5%BD/283000073?i=283000222",
                                "playParams": {
                                    "id": "283000222",
                                    "kind": "song"
                                },
                                "discNumber": 2,
                                "hasLyrics": true,
                                "isAppleDigitalMaster": false,
                                "name": "Pleasure 2008 ~人生の快楽~",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/75/7e/8e/757e8ea7-2cd2-9230-6216-f05a4b646721/mzaf_3980145666140894443.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        }
                    ]
                },
                "artists": {
                    "href": "/v1/catalog/jp/albums/283000073/artists",
                    "data": [
                        {
                            "id": "74931253",
                            "type": "artists",
                            "href": "/v1/catalog/jp/artists/74931253"
                        }
                    ]
                }
            }
        }
    ]
}

3. 楽曲 ID で検索する

アルバム内に含まれていた楽曲 ID「283000183」を使って楽曲の情報を取得します。

今度はこちらを参考にして URL を「https://api.music.apple.com/v1/catalog/jp/songs/283000183」としました。

% curl -s -H 'Authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB' "https://api.music.apple.com/v1/catalog/jp/songs/283000183"

で、返ってきたのがこちら。

あくまで先ほど取得したアルバム「B'z The Best “ULTRA Pleasure」の中の一曲として返ってきている様です。

{
    "data": [
        {
            "id": "283000183",
            "type": "songs",
            "href": "/v1/catalog/jp/songs/283000183",
            "attributes": {
                "albumName": "B'z The Best “ULTRA Pleasure”",
                "genreNames": [
                    "ロック",
                    "ミュージック",
                    "J-Pop",
                    "ワールド ",
                    "J ポップ",
                    "サウンドトラック",
                    "サウンドトラック",
                    "ポップ",
                    "ポップ / ロック",
                    "アフリカ",
                    "アフロビート"
                ],
                "trackNumber": 3,
                "durationInMillis": 248823,
                "releaseDate": "2000-02-09",
                "isrc": "JPBM00805018",
                "artwork": {
                    "width": 2400,
                    "height": 2400,
                    "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                    "bgColor": "b31319",
                    "textColor1": "fff9f9",
                    "textColor2": "e3cccd",
                    "textColor3": "efcbcc",
                    "textColor4": "daa7a9"
                },
                "composerName": "松本孝弘",
                "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB/283000073?i=283000183",
                "playParams": {
                    "id": "283000183",
                    "kind": "song"
                },
                "discNumber": 2,
                "hasLyrics": true,
                "isAppleDigitalMaster": false,
                "name": "今夜月の見える丘に",
                "previews": [
                    {
                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/b9/be/53/b9be5367-8571-7b15-0e2a-b58e660c0bd5/mzaf_10765349844474317131.plus.aac.p.m4a"
                    }
                ],
                "artistName": "B'z"
            },
            "relationships": {
                "albums": {
                    "href": "/v1/catalog/jp/songs/283000183/albums",
                    "data": [
                        {
                            "id": "283000073",
                            "type": "albums",
                            "href": "/v1/catalog/jp/albums/283000073"
                        }
                    ]
                },
                "artists": {
                    "href": "/v1/catalog/jp/songs/283000183/artists",
                    "data": [
                        {
                            "id": "74931253",
                            "type": "artists",
                            "href": "/v1/catalog/jp/artists/74931253"
                        }
                    ]
                }
            }
        }
    ]
}

4. 曲名で検索

シングル版の「今夜月の見える丘に」もあるはずなので、とりあえず曲名で検索してみます。

% curl -s -H 'Authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB' "https://api.music.apple.com/v1/catalog/jp/search?term=今夜月の見える丘に"

たくさん返ってきました。ピアノインスト版も含まれています。

下記データをよくみると、results の下の階層で songs、albums、artists と分かれています。

{
    "results": {
        "songs": {
            "href": "/v1/catalog/jp/search?limit=5&term=%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB&types=songs",
            "next": "/v1/catalog/jp/search?offset=5&term=%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB&types=songs",
            "data": [
                {
                    "id": "283000183",
                    "type": "songs",
                    "href": "/v1/catalog/jp/songs/283000183",
                    "attributes": {
                        "albumName": "B'z The Best “ULTRA Pleasure”",
                        "genreNames": [
                            "ロック",
                            "ミュージック",
                            "J-Pop",
                            "ワールド ",
                            "J ポップ",
                            "サウンドトラック",
                            "サウンドトラック",
                            "ポップ",
                            "ポップ / ロック",
                            "アフリカ",
                            "アフロビート"
                        ],
                        "trackNumber": 3,
                        "releaseDate": "2000-02-09",
                        "durationInMillis": 248823,
                        "isrc": "JPBM00805018",
                        "artwork": {
                            "width": 2400,
                            "height": 2400,
                            "url": "https://is1-ssl.mzstatic.com/image/thumb/Music124/v4/c8/33/0f/c8330fd7-b55f-adf3-5eac-70785a8eee75/BMCV_8022.jpg/{w}x{h}bb.jpg",
                            "bgColor": "b31319",
                            "textColor1": "fff9f9",
                            "textColor2": "e3cccd",
                            "textColor3": "efcbcc",
                            "textColor4": "daa7a9"
                        },
                        "composerName": "松本孝弘",
                        "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB/283000073?i=283000183",
                        "playParams": {
                            "id": "283000183",
                            "kind": "song"
                        },
                        "discNumber": 2,
                        "isAppleDigitalMaster": false,
                        "hasLyrics": true,
                        "name": "今夜月の見える丘に",
                        "previews": [
                            {
                                "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/b9/be/53/b9be5367-8571-7b15-0e2a-b58e660c0bd5/mzaf_10765349844474317131.plus.aac.p.m4a"
                            }
                        ],
                        "artistName": "B'z"
                    }
                },
                {
                    "id": "1560094045",
                    "type": "songs",
                    "href": "/v1/catalog/jp/songs/1560094045",
                    "attributes": {
                        "albumName": "今夜月の見える丘に - Single",
                        "genreNames": [
                            "ロック",
                            "ミュージック",
                            "J-Pop"
                        ],
                        "trackNumber": 1,
                        "releaseDate": "2000-02-09",
                        "durationInMillis": 248667,
                        "isrc": "JPBM09901114",
                        "artwork": {
                            "width": 2400,
                            "height": 2400,
                            "url": "https://is3-ssl.mzstatic.com/image/thumb/Music124/v4/1a/9f/ab/1a9fab6f-0db2-315c-4bfe-75a40e716e25/dj.zbywctsr.jpg/{w}x{h}bb.jpg",
                            "bgColor": "000000",
                            "textColor1": "fffffd",
                            "textColor2": "e5e5e5",
                            "textColor3": "cbcbca",
                            "textColor4": "b7b7b7"
                        },
                        "composerName": "松本孝弘",
                        "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB/1560094041?i=1560094045",
                        "playParams": {
                            "id": "1560094045",
                            "kind": "song"
                        },
                        "discNumber": 1,
                        "isAppleDigitalMaster": false,
                        "hasLyrics": true,
                        "name": "今夜月の見える丘に",
                        "previews": [
                            {
                                "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/68/f5/16/68f516f1-01dd-6bfc-6e8e-c6e3cc746294/mzaf_737226102774676319.plus.aac.p.m4a"
                            }
                        ],
                        "artistName": "B'z"
                    }
                },
                {
                    "id": "666634433",
                    "type": "songs",
                    "href": "/v1/catalog/jp/songs/666634433",
                    "attributes": {
                        "albumName": "B'z The Best XXV 1999-2012",
                        "genreNames": [
                            "ロック",
                            "ミュージック"
                        ],
                        "trackNumber": 2,
                        "durationInMillis": 248600,
                        "releaseDate": "2000-02-09",
                        "isrc": "JPBM09901114",
                        "artwork": {
                            "width": 2400,
                            "height": 2400,
                            "url": "https://is1-ssl.mzstatic.com/image/thumb/Music114/v4/7f/40/d5/7f40d515-4618-1d1c-877e-a3089981b327/BMCV_8042.jpg/{w}x{h}bb.jpg",
                            "bgColor": "000000",
                            "textColor1": "fffffd",
                            "textColor2": "d4fb01",
                            "textColor3": "cbcbca",
                            "textColor4": "a9c900"
                        },
                        "composerName": "松本孝弘",
                        "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB/666634430?i=666634433",
                        "playParams": {
                            "id": "666634433",
                            "kind": "song"
                        },
                        "discNumber": 1,
                        "isAppleDigitalMaster": false,
                        "hasLyrics": true,
                        "name": "今夜月の見える丘に",
                        "previews": [
                            {
                                "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/ab/55/35/ab5535ca-e21a-c757-9620-be3cbaa0a0fa/mzaf_3411343503929317375.plus.aac.p.m4a"
                            }
                        ],
                        "artistName": "B'z"
                    }
                },
                {
                    "id": "75363013",
                    "type": "songs",
                    "href": "/v1/catalog/jp/songs/75363013",
                    "attributes": {
                        "albumName": "ELEVEN",
                        "genreNames": [
                            "ロック",
                            "ミュージック",
                            "J-Pop"
                        ],
                        "trackNumber": 14,
                        "releaseDate": "2000-02-09",
                        "durationInMillis": 249629,
                        "isrc": "JPBM00001120",
                        "artwork": {
                            "width": 2400,
                            "height": 2400,
                            "url": "https://is2-ssl.mzstatic.com/image/thumb/Music124/v4/26/37/88/263788a4-fae1-dbfd-fcf8-8d58eba2e6a9/BMCR-7046.jpg/{w}x{h}bb.jpg",
                            "bgColor": "000000",
                            "textColor1": "fdfeff",
                            "textColor2": "fafdea",
                            "textColor3": "cacbcb",
                            "textColor4": "c8cabb"
                        },
                        "composerName": "松本孝弘",
                        "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB-alternative-guitar-solo-ver/75363205?i=75363013",
                        "playParams": {
                            "id": "75363013",
                            "kind": "song"
                        },
                        "discNumber": 1,
                        "isAppleDigitalMaster": false,
                        "hasLyrics": true,
                        "name": "今夜月の見える丘に (Alternative Guitar Solo ver.)",
                        "previews": [
                            {
                                "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview114/v4/97/b4/9f/97b49f3e-a6ba-2dff-078a-349e84a85163/mzaf_10665736781832925052.plus.aac.p.m4a"
                            }
                        ],
                        "artistName": "B'z"
                    }
                },
                {
                    "id": "393492969",
                    "type": "songs",
                    "href": "/v1/catalog/jp/songs/393492969",
                    "attributes": {
                        "albumName": "12のラブ・ストーリー ピアノ・インテリア",
                        "genreNames": [
                            "インストゥルメンタル",
                            "ミュージック",
                            "J-Pop"
                        ],
                        "trackNumber": 9,
                        "durationInMillis": 290333,
                        "releaseDate": "2001-01-24",
                        "isrc": "JPKI00046130",
                        "artwork": {
                            "width": 941,
                            "height": 941,
                            "url": "https://is1-ssl.mzstatic.com/image/thumb/Music/c8/f2/d0/mzi.ldzduogi.jpg/{w}x{h}bb.jpg",
                            "bgColor": "ffffff",
                            "textColor1": "090909",
                            "textColor2": "212121",
                            "textColor3": "3a3a3a",
                            "textColor4": "4d4d4d"
                        },
                        "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB/393492914?i=393492969",
                        "playParams": {
                            "id": "393492969",
                            "kind": "song"
                        },
                        "discNumber": 1,
                        "hasLyrics": false,
                        "isAppleDigitalMaster": false,
                        "name": "今夜月の見える丘に",
                        "previews": [
                            {
                                "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview125/v4/2c/1d/04/2c1d0460-7f64-46bf-c501-416266565965/mzaf_14225783347699209617.plus.aac.p.m4a"
                            }
                        ],
                        "artistName": "平野孝幸"
                    }
                }
            ]
        },
        "albums": {
            "href": "/v1/catalog/jp/search?limit=5&term=%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB&types=albums",
            "data": [
                {
                    "id": "1560094041",
                    "type": "albums",
                    "href": "/v1/catalog/jp/albums/1560094041",
                    "attributes": {
                        "copyright": "℗ VERMILLION RECORDS",
                        "genreNames": [
                            "ロック",
                            "ミュージック",
                            "J-Pop"
                        ],
                        "releaseDate": "2000-02-09",
                        "isMasteredForItunes": false,
                        "upc": "4938068101185",
                        "artwork": {
                            "width": 2400,
                            "height": 2400,
                            "url": "https://is3-ssl.mzstatic.com/image/thumb/Music124/v4/1a/9f/ab/1a9fab6f-0db2-315c-4bfe-75a40e716e25/dj.zbywctsr.jpg/{w}x{h}bb.jpg",
                            "bgColor": "000000",
                            "textColor1": "fffffd",
                            "textColor2": "e5e5e5",
                            "textColor3": "cbcbca",
                            "textColor4": "b7b7b7"
                        },
                        "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB-single/1560094041",
                        "playParams": {
                            "id": "1560094041",
                            "kind": "album"
                        },
                        "recordLabel": "VERMILLION RECORDS",
                        "trackCount": 2,
                        "isCompilation": false,
                        "isSingle": false,
                        "name": "今夜月の見える丘に - Single",
                        "artistName": "B'z",
                        "isComplete": true
                    }
                }
            ]
        },
        "artists": {
            "href": "/v1/catalog/jp/search?limit=5&term=%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB&types=artists",
            "data": [
                {
                    "id": "74931253",
                    "type": "artists",
                    "href": "/v1/catalog/jp/artists/74931253",
                    "attributes": {
                        "name": "B'z",
                        "genreNames": [
                            "ロック"
                        ],
                        "artwork": {
                            "width": 2400,
                            "height": 2400,
                            "url": "https://is5-ssl.mzstatic.com/image/thumb/Music122/v4/0c/88/58/0c885888-c769-81f8-8485-069cd9a362f1/pr_source.png/{w}x{h}bb.jpg",
                            "bgColor": "dcdfe6",
                            "textColor1": "000001",
                            "textColor2": "1b191e",
                            "textColor3": "2c2c2f",
                            "textColor4": "424046"
                        },
                        "url": "https://music.apple.com/jp/artist/bz/74931253"
                    },
                    "relationships": {
                        "albums": {
                            "href": "/v1/catalog/jp/artists/74931253/albums",
                            "next": "/v1/catalog/jp/artists/74931253/albums?offset=25",
                            "data": [
                                {
                                    "id": "283000073",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/283000073"
                                },
                                {
                                    "id": "292067907",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/292067907"
                                },
                                {
                                    "id": "666625900",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/666625900"
                                },
                                {
                                    "id": "75682683",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75682683"
                                },
                                {
                                    "id": "1561574089",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1561574089"
                                },
                                {
                                    "id": "74937562",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/74937562"
                                },
                                {
                                    "id": "666634430",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/666634430"
                                },
                                {
                                    "id": "75681798",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75681798"
                                },
                                {
                                    "id": "1605118558",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1605118558"
                                },
                                {
                                    "id": "75356318",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75356318"
                                },
                                {
                                    "id": "1466937136",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1466937136"
                                },
                                {
                                    "id": "74933581",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/74933581"
                                },
                                {
                                    "id": "75682153",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75682153"
                                },
                                {
                                    "id": "347013256",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/347013256"
                                },
                                {
                                    "id": "74935606",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/74935606"
                                },
                                {
                                    "id": "75354662",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75354662"
                                },
                                {
                                    "id": "1325460835",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1325460835"
                                },
                                {
                                    "id": "454667912",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/454667912"
                                },
                                {
                                    "id": "297710855",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/297710855"
                                },
                                {
                                    "id": "1561701429",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1561701429"
                                },
                                {
                                    "id": "74944705",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/74944705"
                                },
                                {
                                    "id": "1567851939",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1567851939"
                                },
                                {
                                    "id": "75361124",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75361124"
                                },
                                {
                                    "id": "1567852104",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/1567852104"
                                },
                                {
                                    "id": "75357159",
                                    "type": "albums",
                                    "href": "/v1/catalog/jp/albums/75357159"
                                }
                            ]
                        }
                    }
                }
            ]
        }
    },
    "meta": {
        "results": {
            "order": [
                "songs",
                "albums",
                "artists"
            ],
            "rawOrder": [
                "songs",
                "albums",
                "artists"
            ]
        }
    }
}

曲名が「今夜月の見える丘に - Single」となっているものがあるのでとりあえずこれがシングル版ですね。

おまけ - シングル版「今夜月の見える丘に」

検索の方法はわかったんですがシングル版の方が気になったので検索をかけてみます。

上の JSON データで、songs データにはアルバム「今夜月の見える丘に - Single」に入っている楽曲「今夜月の見える丘に」の情報と、albums データにはアルバム「今夜月の見える丘に - Single」の情報が入っていました。

まずは「今夜月の見える丘に - Single」のアルバム ID「1560094041」で検索します。

% curl -s -H 'Authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB' "https://api.music.apple.com/v1/catalog/jp/albums/1560094041"

カップリング楽曲も含めて返ってきます。

{
    "data": [
        {
            "id": "1560094041",
            "type": "albums",
            "href": "/v1/catalog/jp/albums/1560094041",
            "attributes": {
                "copyright": "℗ VERMILLION RECORDS",
                "genreNames": [
                    "ロック",
                    "ミュージック",
                    "J-Pop"
                ],
                "releaseDate": "2000-02-09",
                "isMasteredForItunes": false,
                "upc": "4938068101185",
                "artwork": {
                    "width": 2400,
                    "height": 2400,
                    "url": "https://is3-ssl.mzstatic.com/image/thumb/Music124/v4/1a/9f/ab/1a9fab6f-0db2-315c-4bfe-75a40e716e25/dj.zbywctsr.jpg/{w}x{h}bb.jpg",
                    "bgColor": "000000",
                    "textColor1": "fffffd",
                    "textColor2": "e5e5e5",
                    "textColor3": "cbcbca",
                    "textColor4": "b7b7b7"
                },
                "playParams": {
                    "id": "1560094041",
                    "kind": "album"
                },
                "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB-single/1560094041",
                "recordLabel": "VERMILLION RECORDS",
                "isCompilation": false,
                "trackCount": 2,
                "isSingle": false,
                "name": "今夜月の見える丘に - Single",
                "artistName": "B'z",
                "isComplete": true
            },
            "relationships": {
                "artists": {
                    "href": "/v1/catalog/jp/albums/1560094041/artists",
                    "data": [
                        {
                            "id": "74931253",
                            "type": "artists",
                            "href": "/v1/catalog/jp/artists/74931253"
                        }
                    ]
                },
                "tracks": {
                    "href": "/v1/catalog/jp/albums/1560094041/tracks",
                    "data": [
                        {
                            "id": "1560094045",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/1560094045",
                            "attributes": {
                                "albumName": "今夜月の見える丘に - Single",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop"
                                ],
                                "trackNumber": 1,
                                "releaseDate": "2000-02-09",
                                "durationInMillis": 248667,
                                "isrc": "JPBM09901114",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is3-ssl.mzstatic.com/image/thumb/Music124/v4/1a/9f/ab/1a9fab6f-0db2-315c-4bfe-75a40e716e25/dj.zbywctsr.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "000000",
                                    "textColor1": "fffffd",
                                    "textColor2": "e5e5e5",
                                    "textColor3": "cbcbca",
                                    "textColor4": "b7b7b7"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB/1560094041?i=1560094045",
                                "playParams": {
                                    "id": "1560094045",
                                    "kind": "song"
                                },
                                "discNumber": 1,
                                "isAppleDigitalMaster": false,
                                "hasLyrics": true,
                                "name": "今夜月の見える丘に",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/68/f5/16/68f516f1-01dd-6bfc-6e8e-c6e3cc746294/mzaf_737226102774676319.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        },
                        {
                            "id": "1560094048",
                            "type": "songs",
                            "href": "/v1/catalog/jp/songs/1560094048",
                            "attributes": {
                                "albumName": "今夜月の見える丘に - Single",
                                "genreNames": [
                                    "ロック",
                                    "ミュージック",
                                    "J-Pop"
                                ],
                                "trackNumber": 2,
                                "releaseDate": "2000-02-09",
                                "durationInMillis": 247767,
                                "isrc": "JPBM09901117",
                                "artwork": {
                                    "width": 2400,
                                    "height": 2400,
                                    "url": "https://is3-ssl.mzstatic.com/image/thumb/Music124/v4/1a/9f/ab/1a9fab6f-0db2-315c-4bfe-75a40e716e25/dj.zbywctsr.jpg/{w}x{h}bb.jpg",
                                    "bgColor": "000000",
                                    "textColor1": "fffffd",
                                    "textColor2": "e5e5e5",
                                    "textColor3": "cbcbca",
                                    "textColor4": "b7b7b7"
                                },
                                "composerName": "松本孝弘",
                                "url": "https://music.apple.com/jp/album/%E3%81%A0%E3%81%8B%E3%82%89%E3%81%9D%E3%81%AE%E6%89%8B%E3%82%92%E9%9B%A2%E3%81%97%E3%81%A6-mixture-style/1560094041?i=1560094048",
                                "playParams": {
                                    "id": "1560094048",
                                    "kind": "song"
                                },
                                "discNumber": 1,
                                "isAppleDigitalMaster": false,
                                "hasLyrics": true,
                                "name": "だからその手を離して -Mixture style-",
                                "previews": [
                                    {
                                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview114/v4/f9/4d/b5/f94db5dd-2b53-49c0-4f1b-296d37a0ead9/mzaf_1661300318659944684.plus.aac.p.m4a"
                                    }
                                ],
                                "artistName": "B'z"
                            }
                        }
                    ]
                }
            }
        }
    ]
}

で、今度は楽曲としての「1560094045」で検索をかけます。URL でも ID の手前部分が「albums/」から「songs/」に変わります。

% curl -s -H 'Authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB' "https://api.music.apple.com/v1/catalog/jp/songs/1560094045"

{
    "data": [
        {
            "id": "1560094045",
            "type": "songs",
            "href": "/v1/catalog/jp/songs/1560094045",
            "attributes": {
                "albumName": "今夜月の見える丘に - Single",
                "genreNames": [
                    "ロック",
                    "ミュージック",
                    "J-Pop"
                ],
                "trackNumber": 1,
                "durationInMillis": 248667,
                "releaseDate": "2000-02-09",
                "isrc": "JPBM09901114",
                "artwork": {
                    "width": 2400,
                    "height": 2400,
                    "url": "https://is3-ssl.mzstatic.com/image/thumb/Music124/v4/1a/9f/ab/1a9fab6f-0db2-315c-4bfe-75a40e716e25/dj.zbywctsr.jpg/{w}x{h}bb.jpg",
                    "bgColor": "000000",
                    "textColor1": "fffffd",
                    "textColor2": "e5e5e5",
                    "textColor3": "cbcbca",
                    "textColor4": "b7b7b7"
                },
                "composerName": "松本孝弘",
                "url": "https://music.apple.com/jp/album/%E4%BB%8A%E5%A4%9C%E6%9C%88%E3%81%AE%E8%A6%8B%E3%81%88%E3%82%8B%E4%B8%98%E3%81%AB/1560094041?i=1560094045",
                "playParams": {
                    "id": "1560094045",
                    "kind": "song"
                },
                "discNumber": 1,
                "hasLyrics": true,
                "isAppleDigitalMaster": false,
                "name": "今夜月の見える丘に",
                "previews": [
                    {
                        "url": "https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview124/v4/68/f5/16/68f516f1-01dd-6bfc-6e8e-c6e3cc746294/mzaf_737226102774676319.plus.aac.p.m4a"
                    }
                ],
                "artistName": "B'z"
            },
            "relationships": {
                "artists": {
                    "href": "/v1/catalog/jp/songs/1560094045/artists",
                    "data": [
                        {
                            "id": "74931253",
                            "type": "artists",
                            "href": "/v1/catalog/jp/artists/74931253"
                        }
                    ]
                },
                "albums": {
                    "href": "/v1/catalog/jp/songs/1560094045/albums",
                    "data": [
                        {
                            "id": "1560094041",
                            "type": "albums",
                            "href": "/v1/catalog/jp/albums/1560094041"
                        }
                    ]
                }
            }
        }
    ]
}

とりあえずこんな感じです。

2022/11/082022/11/24

PyJWT で Apple Music API の Developer Token を作成する

下記を参考にしつつ、Developer Token の作成と Apple 公式のテスト URL での確認を行いました。

手順をメモしておきますが、前提として Apple Developer で Media ID と秘密鍵の作成が終わっている必要があります。

PyJWT と cryptography のインストール
秘密鍵ファイルの確認
Developer Token の作成
curl コマンドでアクセス確認
B'z を検索してみる

PyJWT と cryptography のインストール

まず pip で PyJWT をインストールします。

% pip install pyjwt
Collecting pyjwt
  Downloading https://files.pythonhosted.org/packages/40/46/505f0dd53c14096f01922bf93a7abb4e40e29a06f858abbaa791e6954324/PyJWT-2.6.0-py3-none-any.whl
Installing collected packages: pyjwt
Successfully installed pyjwt-2.6.0

そして cryptography もインストールします。Apple 指定の ES256 での処理には必要だそうです。

% pip install cryptography
Collecting cryptography
  Downloading cryptography-38.0.3-cp36-abi3-macosx_10_10_x86_64.whl (2.8 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2.8/2.8 MB 12.3 MB/s eta 0:00:00
Collecting cffi>=1.12
  Downloading cffi-1.15.1-cp38-cp38-macosx_10_9_x86_64.whl (178 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 178.9/178.9 kB 817.2 kB/s eta 0:00:00
Collecting pycparser
  Using cached pycparser-2.21-py2.py3-none-any.whl (118 kB)
Installing collected packages: pycparser, cffi, cryptography
Successfully installed cffi-1.15.1 cryptography-38.0.3 pycparser-2.21

秘密鍵ファイルの確認

今回は秘密鍵作成時にダウンロードした .p8 ファイルから直接秘密鍵を読み込んで使います。

一旦ファイルが読み込めるか確認します。不慣れなので。。。

>>> f = open('AuthKey_A1BC2DE34F.p8','r')
>>> f.read()
'-----BEGIN PRIVATE KEY-----\nMIGTBgEBMCMGCyqGSM49BgEGBBqGSM49BwEHCHkwdwICBQQg1nVJd1PhibK9odZT\n3yzf1MzRHmtSx2qXmqU5458MW/BgBgYIKoZIzj1DBQehRBNBBBSIDgBHsm//5jXy\nDTqW3JQmqbwwDhMEOb1fk+Cd6Gc681B3CtSubCz5bm9zcO/kMpasgLhM4CTmYoJE\nmMhVfb7q\n-----END PRIVATE KEY-----'
>>>

無事、ファイルが読み込まれていますね。秘密鍵はダミーのものに書き換えてあります。

Developer Token の作成

では仕切り直してもう一度。

jwt の encode メソッドを実行して、ヘッダ、ペイロード、サインの 3 つがエンコード & 「.」で連結された文字列を吐き出します。これが Developer Token になります。

ヘッダーとペイロードに渡す内容はこちらを、コードの書き方についてはこちらを参考にしています。

>>> import jwt
>>> f = open('AuthKey_A1BC2DE34F.p8','r')
>>> key = f.read()
>>> jwt.encode(
...     {"iss": "Z98Y76543X","iat": 1667892347,"exp": 1667978747},
...     key,
...     algorithm = "ES256",
...     headers = {"kid": "A1BC2DE34F"}
... )
'eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB'
>>>

Apple の公式ドキュメントに記載のサンプルコードに当てはめて curl コマンドを実行します。

curl コマンドでアクセステスト

% curl -v -H 'Authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB' "https://api.music.apple.com/v1/test"

重要なのは後半、HTTP のレスポンスが「200」で返ってきている部分です。

*   Trying 23.56.16.9:443...
* Connected to api.music.apple.com (23.56.16.9) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*  CAfile: /etc/ssl/cert.pem
*  CApath: none
* (304) (OUT), TLS handshake, Client hello (1):
* (304) (IN), TLS handshake, Server hello (2):
* (304) (IN), TLS handshake, Unknown (8):
* (304) (IN), TLS handshake, Certificate (11):
* (304) (IN), TLS handshake, CERT verify (15):
* (304) (IN), TLS handshake, Finished (20):
* (304) (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / AEAD-AES256-GCM-SHA384
* ALPN, server accepted to use h2
* Server certificate:
*  subject: businessCategory=Private Organization; jurisdictionCountryName=US; jurisdictionStateOrProvinceName=California; serialNumber=C0806592; C=US; ST=California; L=Cupertino; O=Apple Inc.; OU=management:idms.group.1208920; CN=itunes.apple.com
*  start date: Apr 25 16:27:49 2022 GMT
*  expire date: May 25 16:27:48 2023 GMT
*  subjectAltName: host "api.music.apple.com" matched cert's "api.music.apple.com"
*  issuer: C=US; O=Apple Inc.; CN=Apple Public EV Server RSA CA 2 - G1
*  SSL certificate verify ok.
* Using HTTP2, server supports multiplexing
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x7fb56e811c00)
> GET /v1/test HTTP/2
> Host: api.music.apple.com
> user-agent: curl/7.79.1
> accept: */*
> authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB
> 
< HTTP/2 200 
< server: 4.0.0
< content-type: application/json
< content-length: 0
< x-apple-jingle-correlation-key: Y4JI7FBYVWF6I6MSJMT6OBPQMQ
< x-apple-request-uuid: c7128f94-38ad-8be4-7992-4b27e705f064
< b3: c7128f9438ad8be479924b27e705f064-382f7c8a2052e4cc
< x-b3-traceid: c7128f9438ad8be479924b27e705f064
< x-b3-spanid: 382f7c8a2052e4cc
< apple-seq: 0.0
< apple-tk: false
< apple-originating-system: MZStorePlatform
< x-apple-application-site: ST11
< x-apple-application-instance: 2534168
< x-responding-instance: MZStorePlatform:2534168:::
< apple-timing-app: 7 ms
< access-control-allow-origin: *
< strict-transport-security: max-age=31536000; includeSubDomains
< is-jetty: true
< x-apple-lokamai-no-cache: true
< x-daiquiri-instance: daiquiri:41896001:st53p00it-qujn12040301:7987:22RELEASE167:daiquiri-amp-store-l7shared-int-001-st
< x-daiquiri-instance: daiquiri:42282006:st53p00it-qujn15040502:7987:22RELEASE167:daiquiri-amp-store-l7shared-ext-001-st
< expires: Tue, 08 Nov 2022 11:30:33 GMT
< cache-control: max-age=0, no-cache, private
< pragma: no-cache
< date: Tue, 08 Nov 2022 11:30:33 GMT
< x-cache: TCP_MISS from a23-55-45-84.deploy.akamaitechnologies.com (AkamaiGHost/10.10.1-44825277) (-)
< vary: Accept-Encoding
< vary: Accept-Encoding
< 
* Connection #0 to host api.music.apple.com left intact
%

B'z を検索してみる

ついでに URL の部分を検索用のものに変えてみます。

「"https://api.music.apple.com/v1/catalog/jp/search?term=B'z&types=artists"」

で、実行。

% curl -v -H 'Authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB' "https://api.music.apple.com/v1/catalog/jp/search?term=B'z&types=artists"

するとレスポンスの最後、B'z にまつわる情報が返ってきているのが分かるかと思います。

*   Trying 23.56.16.9:443...
* Connected to api.music.apple.com (23.56.16.9) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*  CAfile: /etc/ssl/cert.pem
*  CApath: none
* (304) (OUT), TLS handshake, Client hello (1):
* (304) (IN), TLS handshake, Server hello (2):
* (304) (IN), TLS handshake, Unknown (8):
* (304) (IN), TLS handshake, Certificate (11):
* (304) (IN), TLS handshake, CERT verify (15):
* (304) (IN), TLS handshake, Finished (20):
* (304) (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / AEAD-AES256-GCM-SHA384
* ALPN, server accepted to use h2
* Server certificate:
*  subject: businessCategory=Private Organization; jurisdictionCountryName=US; jurisdictionStateOrProvinceName=California; serialNumber=C0806592; C=US; ST=California; L=Cupertino; O=Apple Inc.; OU=management:idms.group.1208920; CN=itunes.apple.com
*  start date: Apr 25 16:27:49 2022 GMT
*  expire date: May 25 16:27:48 2023 GMT
*  subjectAltName: host "api.music.apple.com" matched cert's "api.music.apple.com"
*  issuer: C=US; O=Apple Inc.; CN=Apple Public EV Server RSA CA 2 - G1
*  SSL certificate verify ok.
* Using HTTP2, server supports multiplexing
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x7fedf900b600)
> GET /v1/catalog/jp/search?term=B'z&types=artists HTTP/2
> Host: api.music.apple.com
> user-agent: curl/7.79.1
> accept: */*
> authorization: Bearer eyJhbGc_o_JFUzIoN_IsImtpZBI6Iks3XEs1XUI1oFE_LBJoeXB_o_JKVoQ_fQ.eyJpc3M_o_JaoXlENXc3MjZUI_w_aWFoIjoxNDM3MXc5MDM1LBJleHB_ojEooXMyoXgxMDA9.QgQS5gv75mSJMw5Hw5rIoUFUx1-IYyXIsau_Lkv6oMS-GKeLk_XuIWW6aRZ-Ex3-7KUAzMJIR5yHznvw5XIkkB
> 
< HTTP/2 200 
< server: 4.0.0
< content-type: application/json;charset=utf-8
< x-apple-jingle-correlation-key: JOSXR57OF2OG2ZRUJKOEOZVJRA
< x-apple-request-uuid: 4ba578f7-ee2e-9c6d-6634-4a9c4766a988
< b3: 4ba578f7ee2e9c6d66344a9c4766a988-0b03f71f5b294b1c
< x-b3-traceid: 4ba578f7ee2e9c6d66344a9c4766a988
< x-b3-spanid: 0b03f71f5b294b1c
< apple-seq: 0.0
< apple-tk: false
< apple-originating-system: MZStorePlatform
< x-apple-application-site: ST11
< x-apple-application-instance: 2534673
< x-responding-instance: MZStorePlatform:2534673:::
< apple-timing-app: 88 ms
< access-control-allow-origin: *
< strict-transport-security: max-age=31536000; includeSubDomains
< is-jetty: true
< x-daiquiri-instance: daiquiri:41896004:st53p00it-qujn15040101:7987:22RELEASE167:daiquiri-amp-store-l7shared-int-001-st
< x-daiquiri-instance: daiquiri:42282002:st53p00it-qujn13050102:7987:22RELEASE167:daiquiri-amp-store-l7shared-ext-001-st
< cache-control: public, no-transform, max-age=29
< date: Wed, 09 Nov 2022 00:22:40 GMT
< content-length: 8620
< x-cache: TCP_HIT from a23-55-45-84.deploy.akamaitechnologies.com (AkamaiGHost/10.10.1-44825277) (-)
< vary: Accept-Encoding
< vary: Accept-Encoding
< 
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Connection #0 to host api.music.apple.com left intact
","href":"/v1/catalog/jp/albums/1609298956"},{"id":"1584989196","type":"albums","href":"/v1/catalog/jp/albums/1584989196"},{"id":"1522129749","type":"albums","href":"/v1/catalog/jp/albums/1522129749"},{"id":"1648328595","type":"albums","href":"/v1/catalog/jp/albums/1648328595"},{"id":"1635988163","type":"albums","href":"/v1/catalog/jp/albums/1635988163"}]}}}]}},"meta":{"results":{"order":["artists"],"rawOrder":["artists"]}}}%                                                                                                                      %

見づらいので形を整えたものが下記です。

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}

とりあえず無事認証済みの開発者としてアクセスできました。

2022/11/082022/11/24