VK OAuth authorization from CakePHP 2.x with AuthComponent

Features

It is very simple controller from users.

If you need to added other social network, you can use method 'addUser'. Call it in your specific method when OAuth provider return user data.

How do I get set up?

Copy controller.

Create your app in vk.com.

Add in your configures file (app/Config/bootstrap.php):

/**
 * Configures VK authorization
 */
Configure::write('vkAuth', array(
	'app_id' => 'app_id_for_your_app',
	'app_secret' => 'app_secret_for_your_app',
 	'urlGetCode' => 'http://oauth.vk.com/authorize',
 	'urlGetToken' => 'https://oauth.vk.com/access_token',
 	'urlGetUserInfo' => 'https://api.vk.com/method/users.get',    
));

Create table:

CREATE TABLE `users` (
	`id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT,
	`first_name` VARCHAR(255) NOT NULL,
	`last_name` VARCHAR(255) NOT NULL,
	`email` VARCHAR(255) NOT NULL,
	`vk_key` INT(11) UNSIGNED NOT NULL,
	`gender` VARCHAR(1) NOT NULL,
	`birthday` DATE NOT NULL,
	`photo` VARCHAR(255) NOT NULL DEFAULT '',
	PRIMARY KEY (`id`)
)
COLLATE='utf8_general_ci'
ENGINE=InnoDB
AUTO_INCREMENT=3
;

Add link '/users/auth_vk/' in your app.

Create view 'auth_vk.ctp', which used if redirect is failed. Outpud error message like that:

<div class="container">
    <h2>Something went wrong!</h2>
    <?php if (isset($errorMessage)) { ?>
        <p><?php echo $errorMessage ?></p>
    <?php } ?>

    <?php echo $this->Html->link(
        'Try again', 
        array(
            'controller' => 'users',
            'action' => 'auth_vk',
            'admin' => false
        )
    );?>
</div>