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<?php |
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namespace Psr7Middlewares\Middleware; |
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use Psr7Middlewares\Middleware; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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/** |
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* Middleware returns the client ip. |
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*/ |
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class ClientIp |
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{ |
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const KEY = 'CLIENT_IPS'; |
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/** |
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* @var bool |
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*/ |
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private $remote = false; |
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/** |
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* @var array The trusted headers |
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*/ |
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private $headers = [ |
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'Forwarded', |
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'Forwarded-For', |
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'Client-Ip', |
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'X-Forwarded', |
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'X-Forwarded-For', |
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'X-Cluster-Client-Ip', |
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]; |
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/** |
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* Returns all ips found. |
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* |
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* @param ServerRequestInterface $request |
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* |
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* @return array|null |
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*/ |
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public static function getIps(ServerRequestInterface $request) |
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{ |
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return Middleware::getAttribute($request, self::KEY); |
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} |
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/** |
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* Return the client ip. |
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* |
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* @param ServerRequestInterface $request |
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* |
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* @return string|null |
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*/ |
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public static function getIp(ServerRequestInterface $request) |
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{ |
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$ips = self::getIps($request); |
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return isset($ips[0]) ? $ips[0] : null; |
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} |
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/** |
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* Constructor. Defines de trusted headers. |
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* |
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* @param null|array $headers |
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*/ |
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public function __construct(array $headers = null) |
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{ |
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if ($headers !== null) { |
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$this->headers($headers); |
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} |
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} |
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/** |
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* Configure the trusted headers. |
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* |
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* @param array $headers |
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* |
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* @return self |
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*/ |
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public function headers(array $headers) |
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{ |
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$this->headers = $headers; |
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return $this; |
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} |
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/** |
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* To get the ip from a remote service. |
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* Useful for testing purposes on localhost. |
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* |
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* @param bool $remote |
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* |
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* @return self |
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*/ |
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public function remote($remote = true) |
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{ |
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$this->remote = $remote; |
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return $this; |
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} |
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/** |
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* Execute the middleware. |
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* |
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* @param ServerRequestInterface $request |
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* @param ResponseInterface $response |
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* @param callable $next |
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* |
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* @return ResponseInterface |
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*/ |
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public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $next) |
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{ |
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$request = Middleware::setAttribute($request, self::KEY, $this->scanIps($request)); |
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return $next($request, $response); |
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} |
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/** |
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* Detect and return all ips found. |
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* |
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* @param ServerRequestInterface $request |
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* |
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* @return array |
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*/ |
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private function scanIps(ServerRequestInterface $request) |
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{ |
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$server = $request->getServerParams(); |
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$ips = []; |
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if ($this->remote) { |
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$ips[] = file_get_contents('http://ipecho.net/plain'); |
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} |
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if (!empty($server['REMOTE_ADDR']) && filter_var($server['REMOTE_ADDR'], FILTER_VALIDATE_IP)) { |
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$ips[] = $server['REMOTE_ADDR']; |
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} |
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foreach ($this->headers as $name) { |
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$header = $request->getHeaderLine($name); |
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if (!empty($header)) { |
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foreach (array_map('trim', explode(',', $header)) as $ip) { |
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if ((array_search($ip, $ips) === false) && filter_var($ip, FILTER_VALIDATE_IP)) { |
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$ips[] = $ip; |
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} |
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} |
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} |
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} |
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return $ips; |
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} |
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} |
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oscarotero /
psr7-middlewares
