spotify-api/callback.html at master · tbowdollar/spotify-api · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Auth</title>
</head>
<body onload="init()">
  <script>
  function init() {
    function getParameterByName(name, url) {
    if (!url) url = window.location.href;
    name = name.replace(/[\[\]]/g, "\\$&");
    var regex = new RegExp("[?&#]" + name + "(=([^&#]*)|&|#|$)"),
        results = regex.exec(url);
    if (!results) return null;
    if (!results[2]) return '';
    return decodeURIComponent(results[2].replace(/\+/g, " "));
}

  var code = getParameterByName('access_token');
  if (code != '') {
    console.log(code);

    var code_obj = JSON.stringify(code);
    // Store in local storage
    var stored_code = localStorage.setItem('auth_token', code_obj);
    // send to original window
    window.opener.postMessage(code_obj, '*');
    // Close window
    window.close();
    }
  }
  </script>
</body>
</html>