Discord oauth2 with php - php

Question

I'm trying to create a sign in system using disocrd's oauth2.
This is my code:
<?php
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
ini_set('max_execution_time', 300); //300 seconds = 5 minutes. In case if your CURL is slow and is loading too much (Can be IPv6 problem)
error_reporting(E_ALL);
define('OAUTH2_CLIENT_ID', 'XXXXXXXXXXXXXXXXXXXXXX'); //Your client Id
define('OAUTH2_CLIENT_SECRET', 'XXXXXXXXXXXXXXXXXXXXXX'); //Your secret client code
$authorizeURL = 'https://discordapp.com/api/oauth2/authorize';
$tokenURL = 'https://discordapp.com/api/oauth2/token';
$apiURLBase = 'https://discordapp.com/api/users/#me';
session_start();
// Start the login process by sending the user to Discord's authorization page
if(get('action') == 'login') {
// Redirect the user to Discord's authorization page
header('Location: https://discord.com/api/oauth2/authorize?client_id=873917693953191946&redirect_uri=http%3A%2F%2Fbouncerbot.go-atcode.com%2Fauth.php&response_type=code&scope=identify%20email%20connections%20guilds%20gdm.join%20guilds.join%20rpc%20rpc.notifications.read%20rpc.voice.read%20rpc.voice.write');
die();
}
// When Discord redirects the user back here, there will be a "code" and "state" parameter in the query string
if(get('code')) {
$token = apiRequest($tokenURL, array(
"grant_type" => "authorization_code",
'client_id' => 'XXXXXXXXXXXXXXXX', //censored
'client_secret' => 'XXX-XXXXXXXXXXXXXXXXXXX',
'redirect_uri' => 'http://bouncerbot.go-atcode.com/auth.php',
'code' => get('code')
));
$logout_token = $token->access_token;
$_SESSION['access_token'] = $token->access_token;
header('Location: ' . $_SERVER['PHP_SELF']);
}
?><script> console.log(<? echo $user->username?> )</script><?
if(session('access_token')) {
$user = apiRequest($apiURLBase);
echo '<h3>Logged In</h3>';
echo '<h4>Welcome, ' . $user->username . '</h4>';
echo '<pre>';
print_r($user);
echo '</pre>';
} else {
echo '<h3>Not logged in</h3>';
echo '<p>Log In</p>';
}
if(get('action') == 'logout') {
// This must to logout you, but it didn't worked(
$params = array(
'access_token' => $logout_token
);
// Redirect the user to Discord's revoke page
header('Location: https://discordapp.com/api/oauth2/token/revoke' . '?' . http_build_query($params));
die();
}
function apiRequest($url, $post=FALSE, $headers=array()) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$response = curl_exec($ch);
if($post)
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post));
$headers[] = 'Accept: application/json';
if(session('access_token'))
$headers[] = 'Authorization: Bearer ' . session('access_token');
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$response = curl_exec($ch);
return json_decode($response);
}
function get($key, $default=NULL) {
return array_key_exists($key, $_GET) ? $_GET[$key] : $default;
}
function session($key, $default=NULL) {
return array_key_exists($key, $_SESSION) ? $_SESSION[$key] : $default;
}
?>
The problem is that when I go to authorize on discord and then discord redirects me back to auth.php, the token is not fetched and therefore remains:
Not logged in Log In
I couldn't figure out the cause of the problem so I asked a question. This is the login page: http://bouncerbot.go-atcode.com/auth.php

Answer 1

1st) Redirection is working fine because you are using
'redirect_uri' => 'http://bouncerbot.go-atcode.com/auth.php',
That's why to redirect to auth.php
2nd) You have to define the same redirection URL on discord application like this:
3rd) Create a code generation page and redirection page, you can either both on same page or you can create both seprate pages.
As I am testing with creating 2 pages
1. The request for code (disocrd.php)
<?php
define('OAUTH2_CLIENT_ID', '882143362046640112');
$redirectURL = 'https://localhost/test_project/disocrd_responce.php';
$params = array(
'client_id' => OAUTH2_CLIENT_ID,
'redirect_uri' => $redirectURL,
'response_type' => 'code',
'scope' => 'identify guilds'
);
// Redirect the user to Discord's authorization page
header('Location: https://discord.com/api/oauth2/authorize' . '?' . http_build_query($params));
die();
?>
After hit this page, the page will auto-redirect to https://localhost/test_project/disocrd_responce.php with code
2. Generate token by using code (disocrd_responce.php)
<?php
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
ini_set('max_execution_time', 300); //300 seconds = 5 minutes. In case if your CURL is slow and is loading too much (Can be IPv6 problem)
error_reporting(E_ALL);
$code = isset($_REQUEST['code']) ? $_REQUEST['code'] : '';
define('OAUTH2_CLIENT_ID', '882143362046640112');
define('OAUTH2_CLIENT_SECRET', 'hYvpAl_heUJNC0veaoraMxNhJL2fgHVU');
$authorizeURL = 'https://discord.com/api/oauth2/authorize';
$tokenURL = 'https://discord.com/api/oauth2/token';
$redirectURL = 'https://localhost/test_project/disocrd_responce.php';
if(get('code')) {
session_start();
// Exchange the auth code for a token
$token = apiRequest($tokenURL, array(
"grant_type" => "authorization_code",
'client_id' => OAUTH2_CLIENT_ID,
'client_secret' => OAUTH2_CLIENT_SECRET,
'redirect_uri' => $redirectURL,
'code' => get('code')
));
$logout_token = $token->access_token;
$_SESSION['access_token'] = $token->access_token;
echo "<pre>"; print_r($token); exit; // get token properly
// header('Location: ' . $_SERVER['PHP_SELF']);
}
function apiRequest($url, $post=FALSE, $headers=array()) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$response = curl_exec($ch);
if($post){
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post));
}
$headers[] = 'Accept: application/json';
if(isset($_SESSION['access_token']))
$headers[] = 'Authorization: Bearer ' . $_SESSION['access_token'];
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$response = curl_exec($ch);
return json_decode($response);
}
function get($key, $default=NULL) {
return array_key_exists($key, $_GET) ? $_GET[$key] : $default;
}
?>
When I print tokens like this:
echo "<pre>"; print_r($token); exit;
We got token properly like this:
stdClass Object
(
[access_token] => 'FBLOYotKRxe0uO7KJcS8mfce5z9YEE'
[expires_in] => 604800
[refresh_token] => FxlsNH06OHcbMCJlAZhWzbi4DsIjUO
[scope] => identify guilds
[token_type] => Bearer
)
Note: I have a change customer id and token by security point of view

Answer 2

You get the answer in the redirect URL when you test it:
http://bouncerbot.go-atcode.com/auth.php?error=invalid_scope&error_description=The+requested+scope+is+invalid%2C+unknown%2C+or+malformed.
Try only ask for email and see if it works. If it does keep adding stuff until you find what causes the issue.