Simple IP filter for the Slim Framework

gistfile1.txt

<?php
/**
 * Simple IP filter
 *
 * Use this middleware with your Slim Framework application
 * to require restrict access to certain ip addresses
 *
 * USAGE
 *
 * $app = new \Slim\Slim();
 * $app->add(new \lib\Middleware\SimpleIpFilter(array('127.0.0.1', '1.2.3.4')));
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Kim Syversen
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.

 */
namespace lib\Middleware;

class SimpleIpFilter extends \Slim\Middleware {

    /**
     * @var array
     */
    private $_ips;

    /**
     * Constructor
     *
     * @param   array  $ips   IP addresses allowed to execute API calls
     */
    function __construct($ips)
    {
        foreach($ips as $ip)
            $this->_ips[$ip] = true;
    }

    /**
     * Call
     *
     * Perform actions specific to this middleware and optionally
     * call the next downstream middleware.
     */
    public function call()
    {
        if(array_key_exists($this->app->environment['REMOTE_ADDR'], $this->_ips))
            $this->next->call();
        else {
            $this->app->response->status(403);
            $this->app->response->headers->set('Content-Type', 'application/json');
            $this->app->response->body(json_encode(
                array('code' => 403, 'message' => 'Forbidden' )));
        }
    }
} 

Well done ! 👏 simple but effective.