Full Code of spotify/web-api-auth-examples for AI

Repository: spotify/web-api-auth-examples
Branch: master
Commit: 7c4872d343a6
Files: 28
Total size: 47.0 KB

Directory structure:
gitextract_7i56fx55/

├── LICENSE
├── README.md
├── authorization/
│   ├── .gitignore
│   ├── authorization_code/
│   │   ├── README.md
│   │   ├── app.js
│   │   ├── package.json
│   │   └── public/
│   │       └── index.html
│   ├── authorization_code_pkce/
│   │   ├── README.md
│   │   ├── package.json
│   │   └── public/
│   │       ├── app.js
│   │       ├── index.html
│   │       └── style.css
│   ├── catalog-info.yaml
│   ├── client_credentials/
│   │   ├── README.md
│   │   └── app.js
│   └── implicit_grant/
│       ├── README.md
│       ├── app.js
│       ├── package.json
│       └── public/
│           └── index.html
├── catalog-info.yaml
└── get_user_profile/
    ├── .gitignore
    ├── README.md
    ├── index.html
    ├── package.json
    ├── src/
    │   ├── authCodeWithPkce.ts
    │   ├── script.ts
    │   └── types.d.ts
    └── tsconfig.json

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FILE: LICENSE
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================================================
FILE: README.md
================================================
# Spotify Web API Examples

## Contents

- Authorization examples
    - [Authorization Code]( /authorization/authorization_code/)
    - [Authorization Code with PKCE extension]( /authorization/authorization_code_pkce/)
    - [Client Credentials](/authorization/client_credentials)
    - [Implicit Grant](/authorization/implicit_grant/)
- [Get User Profile example](/get_user_profile/)


================================================
FILE: authorization/.gitignore
================================================
node_modules/


================================================
FILE: authorization/authorization_code/README.md
================================================
# Spotify Authorization Code example

This app displays your Spotify profile information using [Authorization Code](https://developer.spotify.com/documentation/web-api/tutorials/code-flow)
to grant permissions to the app.

## Installation

This example runs on Node.js. On [its website](http://www.nodejs.org/download/) you can find instructions on how to install it.

Install the app dependencies running:

    $ npm install

## Using your own credentials

You will need to register your app and get your own credentials from the [Spotify for Developers Dashboard](https://developer.spotify.com/dashboard).

- Create a new app in the dashboard and add `http://localhost:8888/callback` to the app's redirect URL list.
- Once you have created your app, update the `client_id`, `redirect_uri`, and `client_secret` in the `app.js` file with the credentials obtained from the app settings in the dashboard.

## Running the example

From a console shell:

    $ npm start

Then, open `http://localhost:8888` in a browser.


================================================
FILE: authorization/authorization_code/app.js
================================================
/**
 * This is an example of a basic node.js script that performs
 * the Authorization Code oAuth2 flow to authenticate against
 * the Spotify Accounts.
 *
 * For more information, read
 * https://developer.spotify.com/documentation/web-api/tutorials/code-flow
 */

var express = require('express');
var request = require('request');
var crypto = require('crypto');
var cors = require('cors');
var querystring = require('querystring');
var cookieParser = require('cookie-parser');

var client_id = 'yourClientIDGoesHere'; // your clientId
var client_secret = 'YourSecretIDGoesHere'; // Your secret
var redirect_uri = 'http://localhost:8888/callback'; // Your redirect uri


const generateRandomString = (length) => {
  return crypto
  .randomBytes(60)
  .toString('hex')
  .slice(0, length);
}

var stateKey = 'spotify_auth_state';

var app = express();

app.use(express.static(__dirname + '/public'))
   .use(cors())
   .use(cookieParser());

app.get('/login', function(req, res) {

  var state = generateRandomString(16);
  res.cookie(stateKey, state);

  // your application requests authorization
  var scope = 'user-read-private user-read-email';
  res.redirect('https://accounts.spotify.com/authorize?' +
    querystring.stringify({
      response_type: 'code',
      client_id: client_id,
      scope: scope,
      redirect_uri: redirect_uri,
      state: state
    }));
});

app.get('/callback', function(req, res) {

  // your application requests refresh and access tokens
  // after checking the state parameter

  var code = req.query.code || null;
  var state = req.query.state || null;
  var storedState = req.cookies ? req.cookies[stateKey] : null;

  if (state === null || state !== storedState) {
    res.redirect('/#' +
      querystring.stringify({
        error: 'state_mismatch'
      }));
  } else {
    res.clearCookie(stateKey);
    var authOptions = {
      url: 'https://accounts.spotify.com/api/token',
      form: {
        code: code,
        redirect_uri: redirect_uri,
        grant_type: 'authorization_code'
      },
      headers: {
        'content-type': 'application/x-www-form-urlencoded',
        Authorization: 'Basic ' + (new Buffer.from(client_id + ':' + client_secret).toString('base64'))
      },
      json: true
    };

    request.post(authOptions, function(error, response, body) {
      if (!error && response.statusCode === 200) {

        var access_token = body.access_token,
            refresh_token = body.refresh_token;

        var options = {
          url: 'https://api.spotify.com/v1/me',
          headers: { 'Authorization': 'Bearer ' + access_token },
          json: true
        };

        // use the access token to access the Spotify Web API
        request.get(options, function(error, response, body) {
          console.log(body);
        });

        // we can also pass the token to the browser to make requests from there
        res.redirect('/#' +
          querystring.stringify({
            access_token: access_token,
            refresh_token: refresh_token
          }));
      } else {
        res.redirect('/#' +
          querystring.stringify({
            error: 'invalid_token'
          }));
      }
    });
  }
});

app.get('/refresh_token', function(req, res) {

  var refresh_token = req.query.refresh_token;
  var authOptions = {
    url: 'https://accounts.spotify.com/api/token',
    headers: { 
      'content-type': 'application/x-www-form-urlencoded',
      'Authorization': 'Basic ' + (new Buffer.from(client_id + ':' + client_secret).toString('base64')) 
    },
    form: {
      grant_type: 'refresh_token',
      refresh_token: refresh_token
    },
    json: true
  };

  request.post(authOptions, function(error, response, body) {
    if (!error && response.statusCode === 200) {
      var access_token = body.access_token,
          refresh_token = body.refresh_token;
      res.send({
        'access_token': access_token,
        'refresh_token': refresh_token
      });
    }
  });
});

console.log('Listening on 8888');
app.listen(8888);


================================================
FILE: authorization/authorization_code/package.json
================================================
{
  "name": "spotify-authorization-code-example",
  "version": "0.0.2",
  "description": "Spotify Authorization Code flow example",
  "author": "Spotify",
  "scripts": {
    "start": "node app.js"
  },
  "dependencies": {
    "cookie-parser": "1.4.6",
    "cors": "2.8.5",
    "express": "4.18.2",
    "querystring": "~0.2.0",
    "request": "2.88.2"
  }
}


================================================
FILE: authorization/authorization_code/public/index.html
================================================
<!doctype html>
<html>
  <head>
    <title>Example of the Authorization Code flow with Spotify</title>
    <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
    <style type="text/css">
      #login, #loggedin {
        display: none;
      }
      .text-overflow {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        width: 500px;
      }
    </style>
  </head>

  <body>
    <div class="container">
      <div id="login">
        <h1>This is an example of the Authorization Code flow</h1>
        <a href="/login" class="btn btn-primary">Log in with Spotify</a>
      </div>
      <div id="loggedin">
        <div id="user-profile">
        </div>
        <div id="oauth">
        </div>
        <button class="btn btn-default" id="obtain-new-token">Obtain new token using the refresh token</button>
      </div>
    </div>

    <script id="user-profile-template" type="text/x-handlebars-template">
      <h1>Logged in as {{display_name}}</h1>
      <div class="media">
        <div class="pull-left">
          <img class="media-object" width="150" src="{{images.0.url}}" />
        </div>
        <div class="media-body">
          <dl class="dl-horizontal">
            <dt>Display name</dt><dd class="clearfix">{{display_name}}</dd>
            <dt>Id</dt><dd>{{id}}</dd>
            <dt>Email</dt><dd>{{email}}</dd>
            <dt>Spotify URI</dt><dd><a href="{{external_urls.spotify}}">{{external_urls.spotify}}</a></dd>
            <dt>Link</dt><dd><a href="{{href}}">{{href}}</a></dd>
            <dt>Profile Image</dt><dd class="clearfix"><a href="{{images.0.url}}">{{images.0.url}}</a></dd>
            <dt>Country</dt><dd>{{country}}</dd>
          </dl>
        </div>
      </div>
    </script>

    <script id="oauth-template" type="text/x-handlebars-template">
      <h2>oAuth info</h2>
      <dl class="dl-horizontal">
        <dt>Access token</dt><dd class="text-overflow">{{access_token}}</dd>
        <dt>Refresh token</dt><dd class="text-overflow">{{refresh_token}}</dd>
      </dl>
    </script>

    <script src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/2.0.0-alpha.1/handlebars.min.js"></script>
    <script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
    <script>
      (function() {

        /**
         * Obtains parameters from the hash of the URL
         * @return Object
         */
        function getHashParams() {
          var hashParams = {};
          var e, r = /([^&;=]+)=?([^&;]*)/g,
              q = window.location.hash.substring(1);
          while ( e = r.exec(q)) {
             hashParams[e[1]] = decodeURIComponent(e[2]);
          }
          return hashParams;
        }

        var userProfileSource = document.getElementById('user-profile-template').innerHTML,
            userProfileTemplate = Handlebars.compile(userProfileSource),
            userProfilePlaceholder = document.getElementById('user-profile');

        var oauthSource = document.getElementById('oauth-template').innerHTML,
            oauthTemplate = Handlebars.compile(oauthSource),
            oauthPlaceholder = document.getElementById('oauth');

        var params = getHashParams();

        var access_token = params.access_token,
            refresh_token = params.refresh_token,
            error = params.error;

        if (error) {
          alert('There was an error during the authentication');
        } else {
          if (access_token) {
            // render oauth info
            oauthPlaceholder.innerHTML = oauthTemplate({
              access_token: access_token,
              refresh_token: refresh_token
            });

            $.ajax({
                url: 'https://api.spotify.com/v1/me',
                headers: {
                  'Authorization': 'Bearer ' + access_token
                },
                success: function(response) {
                  userProfilePlaceholder.innerHTML = userProfileTemplate(response);

                  $('#login').hide();
                  $('#loggedin').show();
                }
            });
          } else {
              // render initial screen
              $('#login').show();
              $('#loggedin').hide();
          }

          document.getElementById('obtain-new-token').addEventListener('click', function() {
            $.ajax({
              url: '/refresh_token',
              data: {
                'refresh_token': refresh_token
              }
            }).done(function(data) {
              access_token = data.access_token;
              oauthPlaceholder.innerHTML = oauthTemplate({
                access_token: access_token,
                refresh_token: refresh_token
              });
            });
          }, false);
        }
      })();
    </script>
  </body>
</html>



================================================
FILE: authorization/authorization_code_pkce/README.md
================================================
# Spotify Authorization Code with PKCE example

This app displays your Spotify profile information using [Authorization Code with PKCE](https://developer.spotify.com/documentation/web-api/tutorials/code-pkce-flow)
to grant permissions to the app.

## Using your own credentials

You will need to register your app and get your own credentials from the [Spotify for Developers Dashboard](https://developer.spotify.com/dashboard).

- Create a new app in the dashboard and add `http://localhost:8080` to the app's redirect URL list.
- Once you have created your app, update the `client_id` and `redirect_uri` in the `public/app.js` file with the values obtained from the app settings in the dashboard.

## Running the example

From a console shell:

    $ npm start

Then, open `http://localhost:8080` in a browser.


================================================
FILE: authorization/authorization_code_pkce/package.json
================================================
{
  "name": "spotify-authorization-code-pkce",
  "version": "1.0.0",
  "description": "Spotify Authorization Code with PKCE flow example",
  "scripts": {
    "start": "http-server --cors public"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "http-server": "^14.1.1"
  }
}


================================================
FILE: authorization/authorization_code_pkce/public/app.js
================================================
/**
 * This is an example of a basic node.js script that performs
 * the Authorization Code with PKCE oAuth2 flow to authenticate 
 * against the Spotify Accounts.
 *
 * For more information, read
 * https://developer.spotify.com/documentation/web-api/tutorials/code-pkce-flow
 */

const clientId = 'yourClientIDGoesHere'; // your clientId
const redirectUrl = 'eg:http://localhost:8080';        // your redirect URL - must be localhost URL and/or HTTPS

const authorizationEndpoint = "https://accounts.spotify.com/authorize";
const tokenEndpoint = "https://accounts.spotify.com/api/token";
const scope = 'user-read-private user-read-email';

// Data structure that manages the current active token, caching it in localStorage
const currentToken = {
  get access_token() { return localStorage.getItem('access_token') || null; },
  get refresh_token() { return localStorage.getItem('refresh_token') || null; },
  get expires_in() { return localStorage.getItem('refresh_in') || null },
  get expires() { return localStorage.getItem('expires') || null },

  save: function (response) {
    const { access_token, refresh_token, expires_in } = response;
    localStorage.setItem('access_token', access_token);
    localStorage.setItem('refresh_token', refresh_token);
    localStorage.setItem('expires_in', expires_in);

    const now = new Date();
    const expiry = new Date(now.getTime() + (expires_in * 1000));
    localStorage.setItem('expires', expiry);
  }
};

// On page load, try to fetch auth code from current browser search URL
const args = new URLSearchParams(window.location.search);
const code = args.get('code');

// If we find a code, we're in a callback, do a token exchange
if (code) {
  const token = await getToken(code);
  currentToken.save(token);

  // Remove code from URL so we can refresh correctly.
  const url = new URL(window.location.href);
  url.searchParams.delete("code");

  const updatedUrl = url.search ? url.href : url.href.replace('?', '');
  window.history.replaceState({}, document.title, updatedUrl);
}

// If we have a token, we're logged in, so fetch user data and render logged in template
if (currentToken.access_token) {
  const userData = await getUserData();
  renderTemplate("main", "logged-in-template", userData);
  renderTemplate("oauth", "oauth-template", currentToken);
}

// Otherwise we're not logged in, so render the login template
if (!currentToken.access_token) {
  renderTemplate("main", "login");
}

async function redirectToSpotifyAuthorize() {
  const possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  const randomValues = crypto.getRandomValues(new Uint8Array(64));
  const randomString = randomValues.reduce((acc, x) => acc + possible[x % possible.length], "");

  const code_verifier = randomString;
  const data = new TextEncoder().encode(code_verifier);
  const hashed = await crypto.subtle.digest('SHA-256', data);

  const code_challenge_base64 = btoa(String.fromCharCode(...new Uint8Array(hashed)))
    .replace(/=/g, '')
    .replace(/\+/g, '-')
    .replace(/\//g, '_');

  window.localStorage.setItem('code_verifier', code_verifier);

  const authUrl = new URL(authorizationEndpoint)
  const params = {
    response_type: 'code',
    client_id: clientId,
    scope: scope,
    code_challenge_method: 'S256',
    code_challenge: code_challenge_base64,
    redirect_uri: redirectUrl,
  };

  authUrl.search = new URLSearchParams(params).toString();
  window.location.href = authUrl.toString(); // Redirect the user to the authorization server for login
}

// Soptify API Calls
async function getToken(code) {
  const code_verifier = localStorage.getItem('code_verifier');

  const response = await fetch(tokenEndpoint, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded',
    },
    body: new URLSearchParams({
      client_id: clientId,
      grant_type: 'authorization_code',
      code: code,
      redirect_uri: redirectUrl,
      code_verifier: code_verifier,
    }),
  });

  return await response.json();
}

async function refreshToken() {
  const response = await fetch(tokenEndpoint, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded'
    },
    body: new URLSearchParams({
      client_id: clientId,
      grant_type: 'refresh_token',
      refresh_token: currentToken.refresh_token
    }),
  });

  return await response.json();
}

async function getUserData() {
  const response = await fetch("https://api.spotify.com/v1/me", {
    method: 'GET',
    headers: { 'Authorization': 'Bearer ' + currentToken.access_token },
  });

  return await response.json();
}

// Click handlers
async function loginWithSpotifyClick() {
  await redirectToSpotifyAuthorize();
}

async function logoutClick() {
  localStorage.clear();
  window.location.href = redirectUrl;
}

async function refreshTokenClick() {
  const token = await refreshToken();
  currentToken.save(token);
  renderTemplate("oauth", "oauth-template", currentToken);
}

// HTML Template Rendering with basic data binding - demoware only.
function renderTemplate(targetId, templateId, data = null) {
  const template = document.getElementById(templateId);
  const clone = template.content.cloneNode(true);

  const elements = clone.querySelectorAll("*");
  elements.forEach(ele => {
    const bindingAttrs = [...ele.attributes].filter(a => a.name.startsWith("data-bind"));

    bindingAttrs.forEach(attr => {
      const target = attr.name.replace(/data-bind-/, "").replace(/data-bind/, "");
      const targetType = target.startsWith("onclick") ? "HANDLER" : "PROPERTY";
      const targetProp = target === "" ? "innerHTML" : target;

      const prefix = targetType === "PROPERTY" ? "data." : "";
      const expression = prefix + attr.value.replace(/;\n\r\n/g, "");

      // Maybe use a framework with more validation here ;)
      try {
        ele[targetProp] = targetType === "PROPERTY" ? eval(expression) : () => { eval(expression) };
        ele.removeAttribute(attr.name);
      } catch (ex) {
        console.error(`Error binding ${expression} to ${targetProp}`, ex);
      }
    });
  });

  const target = document.getElementById(targetId);
  target.innerHTML = "";
  target.appendChild(clone);
}


================================================
FILE: authorization/authorization_code_pkce/public/index.html
================================================
<!DOCTYPE html>
<html>

<head>
  <title>Example of the Authorization Code with PKCE flow with Spotify</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>

  <div id="main"></div>
  <div id="oauth"></div>

  <template id="login">
    <h1>Welcome to the OAuth2 PKCE Example</h1>
    <button id="login-button" data-bind-onclick="loginWithSpotifyClick();"> Log in with Spotify </button>
  </template>

  <template id="logged-in-template">
    <h1>Logged in as <span data-bind="display_name"></span></h1>
    <img width="150" data-bind-src="images[0].url" data-bind-alt="display_name" />
    <table>
      <tr>
        <td>Display name</td>
        <td data-bind="display_name"></td>
      </tr>
      <tr>
        <td>Id</td>
        <td data-bind="id"></td>
      </tr>
      <tr>
        <td>Email</td>
        <td data-bind="email"></td>
      </tr>
      <tr>
        <td>Spotify URI</td>
        <td>
          <a data-bind="external_urls.spotify" data-bind-href="external_urls.spotify"></a>
        </td>
      </tr>
      <tr>
        <td>Link </dt>
        <td>
          <a data-bind="href" data-bind-href="href"></a>
        </td>
      </tr>
      <tr>
        <td>Profile Image</td>
        <td>
          <a data-bind-href="images[0].url" data-bind="images[0].url"></a>
        </td>
      </tr>
      <tr>
        <td>Country</td>
        <td data-bind="country"></td>
      </tr>
    </table>

    <button id="refresh-token-button" data-bind-onclick="refreshTokenClick();">Refresh Token</button>
    <button id="logout-button" data-bind-onclick="logoutClick();">Log out</button>
  </template>

  <template id="oauth-template">
    <h2>oAuth info</h2>
    <table>
      <tr>
        <td>Access token</td>
        <td data-bind="access_token"></td>
      </tr>
      <tr>
        <td>Refresh token</td>
        <td data-bind="refresh_token"></td>
      </tr>
      <tr>
        <td>Expiration at</td>
        <td data-bind="expires">${getExpirationDate(expires_in)}</td>
      </tr>
    </table>
  </template>

  <script src="app.js" type="module"></script>
</body>

</html>


================================================
FILE: authorization/authorization_code_pkce/public/style.css
================================================
body {
    margin: 1rem;
    font-family: Arial, Helvetica, sans-serif;
}

tr:nth-child(even) {
    background-color: #eee;
}

td:first-child {
    font-weight: bold;
}

td {
    white-space: nowrap;
    padding: 10px;
    margin-right: 1rem;
}

button {
    margin: 1rem 1rem 0 0;
    border: 0;
    border-radius: 20px;
    padding: 10px 3rem;
    font-size: 0.8rem;
    font-family: Arial, Helvetica, sans-serif;
    text-transform: uppercase;
    font-weight: bold;
    background-color:#1ed760;
    color: black;
}

button:hover {
    background-color: #1fdf64;
}

#logged-in {
    display: none;
}


================================================
FILE: authorization/catalog-info.yaml
================================================
apiVersion: backstage.io/v1alpha1
kind: Component
metadata:
  name: web-api-auth-examples
spec:
  type: library
  owner: opx-partner-activation


================================================
FILE: authorization/client_credentials/README.md
================================================
# Spotify Client Credentials example

This app retrieves information from an artist's track using [Client Credentials](https://developer.spotify.com/documentation/web-api/tutorials/code-flow)
to grant permissions to the app.

## Installation

This example runs on Node.js. On [its website](http://www.nodejs.org/download/) you can find instructions on how to install it.

### Using your own credentials

You will need to register your app and get your own credentials from the [Spotify for Developers Dashboard](https://developer.spotify.com/dashboard).

- Create a new app in the dashboard and add `http://localhost:8888/callback` to the app's redirect URL list.
- Once you have created your app, update the `client_id` and `client_secret` in the `app.js` file with the credentials obtained from the app settings in the dashboard.

## Running the example

From a console shell:

    $ node app.js


================================================
FILE: authorization/client_credentials/app.js
================================================
/**
 * This is an example of a basic node.js script that performs
 * the Client Credentials oAuth2 flow to authenticate against
 * the Spotify Accounts.
 *
 * For more information, read
 * https://developer.spotify.com/documentation/web-api/tutorials/client-credentials-flow
 */

const client_id = 'YourClientId'; 
const client_secret = 'YourClientSecret';

async function getToken() {
  const response = await fetch('https://accounts.spotify.com/api/token', {
    method: 'POST',
    body: new URLSearchParams({
      'grant_type': 'client_credentials',
    }),
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded',
      'Authorization': 'Basic ' + (Buffer.from(client_id + ':' + client_secret).toString('base64')),
    },
  });

  return await response.json();
}

async function getTrackInfo(access_token) {
  const response = await fetch("https://api.spotify.com/v1/tracks/4cOdK2wGLETKBW3PvgPWqT", {
    method: 'GET',
    headers: { 'Authorization': 'Bearer ' + access_token },
  });

  return await response.json();
}

getToken().then(response => {
  getTrackInfo(response.access_token).then(profile => {
    console.log(profile)
  })
});


================================================
FILE: authorization/implicit_grant/README.md
================================================
# Spotify Implicit Grant example

This app displays your Spotify profile information using [Implicit Grant](https://developer.spotify.com/documentation/web-api/tutorials/implicit-flow)
to grant permissions to the app.

> The implicit grant flow has some significant security flaws, so we strongly advise against using this flow. If you need to implement authorization where storing your client secret is not possible, use Authorization code with PKCE instead.

## Installation

This example runs on Node.js. On [its website](http://www.nodejs.org/download/) you can find instructions on how to install it.

Install the app dependencies running:

    $ npm install

## Using your own credentials

You will need to register your app and get your own credentials from the [Spotify for Developers Dashboard](https://developer.spotify.com/dashboard).

- Create a new app in the dashboard and add `http://localhost:8080` to the app's redirect URL list.
- Once you have created your app, update the `client_id` and `redirect_uri` in the `public/index.html` file with the values obtained from the app settings in the dashboard.

## Running the example

From a console shell:

    $ npm start

Then, open `http://localhost:8080` in a browser.


================================================
FILE: authorization/implicit_grant/app.js
================================================
/**
 * This is an example of a basic node.js script that performs
 * the Implicit Grant oAuth2 flow to authenticate against
 * the Spotify Accounts.
 *
 * For more information, read
 * https://developer.spotify.com/documentation/web-api/tutorials/implicit-flow
 */

var express = require('express'); // Express web server framework
var app = express();
app.use(express.static(__dirname + '/public'));
console.log('Listening on 8888');
app.listen(8888);


================================================
FILE: authorization/implicit_grant/package.json
================================================
{
  "name": "spotify-implicit-grant-example",
  "version": "0.0.2",
  "description": "Spotify Implicit Grant example",
  "author": "Spotify",
  "scripts": {
    "start": "node app.js"
  },
  "dependencies": {
    "express": "4.18.2"
  }
}


================================================
FILE: authorization/implicit_grant/public/index.html
================================================
<!doctype html>
<html>
  <head>
    <title>Example of the Implicit Grant flow with Spotify</title>
    <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
    <style type="text/css">
      #login, #loggedin {
        display: none;
      }
      .text-overflow {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        width: 500px;
      }
    </style>
  </head>

  <body>
    <div class="container">
      <div id="login">
        <h1>This is an example of the Implicit Grant flow</h1>
        <button id="login-button" class="btn btn-primary">Log in with Spotify</button>
      </div>
      <div id="loggedin">
        <div id="user-profile">
        </div>
        <div id="oauth">
        </div>
      </div>
    </div>

    <script id="user-profile-template" type="text/x-handlebars-template">
      <h1>Logged in as {{display_name}}</h1>
      <div class="media">
        <div class="pull-left">
          <img class="media-object" width="150" src="{{images.0.url}}" />
        </div>
        <div class="media-body">
          <dl class="dl-horizontal">
            <dt>Display name</dt><dd class="clearfix">{{display_name}}</dd>
            <dt>Id</dt><dd>{{id}}</dd>
            <dt>Email</dt><dd>{{email}}</dd>
            <dt>Spotify URI</dt><dd><a href="{{external_urls.spotify}}">{{external_urls.spotify}}</a></dd>
            <dt>Link</dt><dd><a href="{{href}}">{{href}}</a></dd>
            <dt>Profile Image</dt><dd class="clearfix"><a href="{{images.0.url}}">{{images.0.url}}</a></dd>
            <dt>Country</dt><dd>{{country}}</dd>
          </dl>
        </div>
      </div>
    </script>

    <script id="oauth-template" type="text/x-handlebars-template">
      <h2>oAuth info</h2>
      <dl class="dl-horizontal">
        <dt>Access token</dt><dd class="text-overflow">{{access_token}}</dd>
      </dl>
    </script>

    <script src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/2.0.0-alpha.1/handlebars.min.js"></script>
    <script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
    <script>
      (function() {

        var stateKey = 'spotify_auth_state';

        /**
         * Obtains parameters from the hash of the URL
         * @return Object
         */
        function getHashParams() {
          var hashParams = {};
          var e, r = /([^&;=]+)=?([^&;]*)/g,
              q = window.location.hash.substring(1);
          while ( e = r.exec(q)) {
             hashParams[e[1]] = decodeURIComponent(e[2]);
          }
          return hashParams;
        }

        /**
         * Generates a random string containing numbers and letters
         * @param  {number} length The length of the string
         * @return {string} The generated string
         */
        function generateRandomString(length) {
          var text = '';
          var possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

          for (var i = 0; i < length; i++) {
            text += possible.charAt(Math.floor(Math.random() * possible.length));
          }
          return text;
        };

        var userProfileSource = document.getElementById('user-profile-template').innerHTML,
            userProfileTemplate = Handlebars.compile(userProfileSource),
            userProfilePlaceholder = document.getElementById('user-profile');

            oauthSource = document.getElementById('oauth-template').innerHTML,
            oauthTemplate = Handlebars.compile(oauthSource),
            oauthPlaceholder = document.getElementById('oauth');

        var params = getHashParams();

        var access_token = params.access_token,
            state = params.state,
            storedState = localStorage.getItem(stateKey);

        if (access_token && (state == null || state !== storedState)) {
          alert('There was an error during the authentication');
        } else {
          localStorage.removeItem(stateKey);
          if (access_token) {
            $.ajax({
                url: 'https://api.spotify.com/v1/me',
                headers: {
                  'Authorization': 'Bearer ' + access_token
                },
                success: function(response) {
                  userProfilePlaceholder.innerHTML = userProfileTemplate(response);

                  $('#login').hide();
                  $('#loggedin').show();
                }
            });
          } else {
              $('#login').show();
              $('#loggedin').hide();
          }

          document.getElementById('login-button').addEventListener('click', function() {

            var client_id = 'CLIENT_ID'; // Your client id
            var redirect_uri = 'REDIRECT_URI'; // Your redirect uri

            var state = generateRandomString(16);

            localStorage.setItem(stateKey, state);
            var scope = 'user-read-private user-read-email';

            var url = 'https://accounts.spotify.com/authorize';
            url += '?response_type=token';
            url += '&client_id=' + encodeURIComponent(client_id);
            url += '&scope=' + encodeURIComponent(scope);
            url += '&redirect_uri=' + encodeURIComponent(redirect_uri);
            url += '&state=' + encodeURIComponent(state);

            window.location = url;
          }, false);
        }
      })();
    </script>
</html>


================================================
FILE: catalog-info.yaml
================================================
apiVersion: backstage.io/v1alpha1
kind: Component
metadata:
  name: web-api-auth-examples
spec:
  type: library
  owner: opx-partner-activation


================================================
FILE: get_user_profile/.gitignore
================================================
# Logs
logs
*.log
npm-debug.log*
yarn-debug.log*
yarn-error.log*
pnpm-debug.log*
lerna-debug.log*

node_modules
dist
dist-ssr
*.local

# Editor directories and files
.vscode/*
!.vscode/extensions.json
.idea
.DS_Store
*.suo
*.ntvs*
*.njsproj
*.sln
*.sw?


================================================
FILE: get_user_profile/README.md
================================================

# Display your Spotify Profile Data in a Web App

This is the final code for the Spotify Web API - How to Display your Profile Data in a Web . You can run this demo directly or [walk through the tutorial](https://developer.spotify.com/documentation/web-api/howtos/web-app-profile).

## Pre-requisites

To run this demo you will need:

- A [Node.js LTS](https://nodejs.org/en/) environment or later.
- A [Spotify Developer Account](https://developer.spotify.com/)

## Usage

Create an app in your [Spotify Developer Dashboard](https://developer.spotify.com/dashboard/), set the redirect URI to ` http://localhost:5173/callback` and `http://localhost:5173/callback/` and copy your Client ID. 

Clone the repository, ensure that you are in the `get_user_profile` directory and run:

```bash
npm install
npm run dev
```

Replace the value for clientId in `/src/script.ts` with your own Client ID.


================================================
FILE: get_user_profile/index.html
================================================
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <title>Example</title>
  <script src="src/script.ts" type="module"></script>
</head>

<body>
  <h1>Display your Spotify Profile Data</h1>

  <section id="profile">
    <h2>Logged in as <span id="displayName"></span></h2>
    <img id="avatar" width="200" src="#" />
    <ul>
      <li>User ID: <span id="id"></span></li>
      <li>Email: <span id="email"></span></li>
      <li>Spotify URI: <a id="uri" href="#"></a></li>
      <li>Link: <a id="url" href="#"></a></li>
      <li>Profile Image: <span id="imgUrl"></span></li>
    </ul>
  </section>

</body>

</html>


================================================
FILE: get_user_profile/package.json
================================================
{
  "name": "vite-project",
  "private": true,
  "version": "0.0.0",
  "type": "module",
  "scripts": {
    "dev": "vite",
    "build": "tsc && vite build",
    "preview": "vite preview"
  },
  "devDependencies": {
    "typescript": "^4.9.3",
    "vite": "^4.0.0"
  }
}

================================================
FILE: get_user_profile/src/authCodeWithPkce.ts
================================================
export async function redirectToAuthCodeFlow(clientId: string) {
    const verifier = generateCodeVerifier(128);
    const challenge = await generateCodeChallenge(verifier);

    localStorage.setItem("verifier", verifier);

    const params = new URLSearchParams();
    params.append("client_id", clientId);
    params.append("response_type", "code");
    params.append("redirect_uri", "http://localhost:5173/callback");
    params.append("scope", "user-read-private user-read-email");
    params.append("code_challenge_method", "S256");
    params.append("code_challenge", challenge);

    document.location = `https://accounts.spotify.com/authorize?${params.toString()}`;
}

export async function getAccessToken(clientId: string, code: string) {
    const verifier = localStorage.getItem("verifier");

    const params = new URLSearchParams();
    params.append("client_id", clientId);
    params.append("grant_type", "authorization_code");
    params.append("code", code);
    params.append("redirect_uri", "http://localhost:5173/callback");
    params.append("code_verifier", verifier!);

    const result = await fetch("https://accounts.spotify.com/api/token", {
        method: "POST",
        headers: { "Content-Type": "application/x-www-form-urlencoded" },
        body: params
    });

    const { access_token } = await result.json();
    return access_token;
}

function generateCodeVerifier(length: number) {
    let text = '';
    let possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

    for (let i = 0; i < length; i++) {
        text += possible.charAt(Math.floor(Math.random() * possible.length));
    }
    return text;
}

async function generateCodeChallenge(codeVerifier: string) {
    const data = new TextEncoder().encode(codeVerifier);
    const digest = await window.crypto.subtle.digest('SHA-256', data);
    return btoa(String.fromCharCode.apply(null, [...new Uint8Array(digest)]))
        .replace(/\+/g, '-')
        .replace(/\//g, '_')
        .replace(/=+$/, '');
}


================================================
FILE: get_user_profile/src/script.ts
================================================
// Because this is a literal single page application
// we detect a callback from Spotify by checking for the hash fragment
import { redirectToAuthCodeFlow, getAccessToken } from "./authCodeWithPkce";

const clientId = "your_client_id";
const params = new URLSearchParams(window.location.search);
const code = params.get("code");

if (!code) {
    redirectToAuthCodeFlow(clientId);
} else {
    const accessToken = await getAccessToken(clientId, code);
    const profile = await fetchProfile(accessToken);
    populateUI(profile);
}

async function fetchProfile(code: string): Promise<UserProfile> {
    const result = await fetch("https://api.spotify.com/v1/me", {
        method: "GET", headers: { Authorization: `Bearer ${code}` }
    });

    return await result.json();
}

function populateUI(profile: UserProfile) {
    document.getElementById("displayName")!.innerText = profile.display_name;
    document.getElementById("avatar")!.setAttribute("src", profile.images[0].url)
    document.getElementById("id")!.innerText = profile.id;
    document.getElementById("email")!.innerText = profile.email;
    document.getElementById("uri")!.innerText = profile.uri;
    document.getElementById("uri")!.setAttribute("href", profile.external_urls.spotify);
    document.getElementById("url")!.innerText = profile.href;
    document.getElementById("url")!.setAttribute("href", profile.href);
    document.getElementById("imgUrl")!.innerText = profile.images[0].url;
}


================================================
FILE: get_user_profile/src/types.d.ts
================================================
interface UserProfile {
    country: string;
    display_name: string;
    email: string;
    explicit_content: {
        filter_enabled: boolean,
        filter_locked: boolean
    },
    external_urls: { spotify: string; };
    followers: { href: string; total: number; };
    href: string;
    id: string;
    images: Image[];
    product: string;
    type: string;
    uri: string;
}

interface Image {
    url: string;
    height: number;
    width: number;
}


================================================
FILE: get_user_profile/tsconfig.json
================================================
{
  "compilerOptions": {
    "target": "ESNext",
    "useDefineForClassFields": true,
    "module": "ESNext",
    "lib": ["ESNext", "DOM"],
    "moduleResolution": "Node",
    "strict": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "esModuleInterop": true,
    "noEmit": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "skipLibCheck": true
  },
  "include": ["src"]
}