Kohana Controller various media handler example

<?php defined('SYSPATH') or die('No direct script access.');

class Controller_Media extends Controller {

    public function before()
    {
        parent::before();

        $this->config = Kohana::$config->load('media');
        $this->folder = 'assets';
        $this->member = new Helper_Member;

        if(isset($_GET['url-sign']) AND preg_match('/^[\.\d\w\/]+$/', $_GET['url-sign']))
        {
            $this->member->account = Model_Account::get_by('url-sign', $_GET['url-sign']);
        }
    }

    public function action_css()
    {
        $this->member->access_permission("public");
        $this->handle_request(
            'style',
            $this->request->param('path'),
            $this->config['styles']['extension']
        );
    }

    public function action_js()
    {
        $this->member->access_permission("public");

        $this->handle_request(
            'script',
            $this->request->param('path'),
            $this->config['scripts']['extension']
        );
    }

    public function action_views()
    {
        $this->member->access_permission("public");

        $this->handle_request(
            'view',
            $this->request->param('path'),
            $this->config['views']['extension']
        );
    }

    public function action_fonts()
    {
        $this->member->access_permission("public");

        $extension = $this->find_extension(
            $this->config['fonts']['directory'].$this->request->param('path'),
            $this->config['fonts']['extension']
        );

        $this->handle_request(
            'font',
            $this->request->param('path'),
            $extension
        );
    }

    public function action_img()
    {
        $this->member->access_permission("public");

        $extension = $this->find_extension(
            $this->config['images']['directory'].$this->request->param('path'),
            $this->config['images']['extension']
        );

        $this->handle_request(
            'image',
            $this->request->param('path'),
            $extension
        );
    }

    public function action_video()
    {
        $this->member->access_permission("member");
        $this->folder = 'files';

        $extension = $this->find_extension(
            $this->config['videos']['directory'].$this->request->param('path'),
            $this->config['videos']['extension']
        );

        $this->handle_request(
            'video',
            $this->request->param('path'),
            $extension
        );
    }

    public function action_audio()
    {
        if(isset($_GET['url-sign']))
        {
            $this->member->access_membership("audio");
        }
        else
        {
            $this->member->access_permission("member");
        }
        $this->folder = 'files';

        $extension = $this->find_extension(
            $this->config['audios']['directory'].$this->request->param('path'),
            $this->config['audios']['extension']
        );

        $this->handle_request(
            'audio',
            $this->request->param('path'),
            $extension
        );
    }

    public function action_avatar()
    {
        $this->member->access_permission("public");
        $this->folder = 'files';

        $extension = $this->find_extension(
            $this->config['avatars']['directory'].$this->request->param('path'),
            $this->config['images']['extension']
        );

        $this->handle_request(
            'avatar',
            $this->request->param('path'),
            $extension
        );
    }

    public function action_cv_document()
    {
        if(isset($_GET['url-sign']))
        {
            $this->member->access_membership("editing");
        }
        else
        {
            $this->member->access_permission("member");
        }
        $this->folder = 'files';

        $extension = $this->find_extension(
            $this->config['cv_documents']['directory'].$this->request->param('path'),
            $this->config['cv_documents']['extension']
        );

        $this->handle_request(
            'cv_document',
            $this->request->param('path'),
            $extension
        );
    }

    public function action_qr()
    {
        $this->member->access_permission("public");
        $this->folder = 'files';

        $extension = $this->find_extension(
            $this->config['qrs']['directory'].$this->request->param('path'),
            $this->config['images']['extension']
        );

        $this->handle_request(
            'qr',
            $this->request->param('path'),
            $extension
        );
    }

    protected function handle_request($action, $path, $extension)
    {
        $config_key = Inflector::plural($action);
        $file = $this->config[$config_key]['directory'].$path;

        if ($this->find_file($file, $extension))
        {
            $this->serve_file($file, $extension);
        }
        else
        {
            $this->error();
        }
    }

    protected function find_file($file, $extension)
    {
        $path_parts = pathinfo($file);

        // echo Debug::vars($path_parts, $this->folder, $path_parts['dirname']."/".$path_parts['filename'], $extension);

        return Kohana::find_file($this->folder, $path_parts['dirname']."/".$path_parts['filename'], $extension);
    }

    protected function find_extension($file, $exts)
    {
        $pi = pathinfo($file);

        foreach ($exts as $extension)
        {
            if ($pi['extension'] == $extension)
            {
                return $extension;
            }
        }

        return FALSE;
    }

    protected function serve_file($file, $extension)
    {
        $path = $this->find_file($file, $extension);

        $this->response->headers('Content-Type', File::mime_by_ext($extension));
        $this->response->headers('Content-Length', (string) filesize($path));
        $this->response->headers('Cache-Control','max-age=86400, public');
        $this->response->headers('Expires', gmdate('D, d M Y H:i:s \G\M\T', time() + 86400));
        $this->response->body(file_get_contents($path));
    }

    protected function error()
    {
        throw new HTTP_Exception_404('File :file not found.', array(
            ':file' => $this->request->param('path', NULL),
        ));
    }

} // End Welcome