http2/middleware.php

   1 <?php
   2 // Hoplite
   3 // Copyright (c) 2016 Blue Static
   4 //
   5 // This program is free software: you can redistribute it and/or modify it
   6 // under the terms of the GNU General Public License as published by the Free
   7 // Software Foundation, either version 3 of the License, or any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful, but WITHOUT
  10 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12 // more details.
  13 //
  14 // You should have received a copy of the GNU General Public License along with
  15 // this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 namespace hoplite\http2;
  18
  19 require_once HOPLITE_ROOT . '/http2/pipeline.php';
  20 require_once HOPLITE_ROOT . '/http2/request.php';
  21 require_once HOPLITE_ROOT . '/http2/response.php';
  22
  23 abstract class Middleware {
  24   protected $next;
  25
  26   public function __construct(Middleware $next) {
  27     $this->next = $next;
  28   }
  29
  30   public abstract /*http\Response*/ function execute(Request $request);
  31 }
  32
  33 class Sentinel extends Middleware {
  34   private $response;
  35
  36   public function __construct(Response $response) {
  37     $this->response = $response;
  38   }
  39
  40   public function execute(Request $request) {
  41     return $this->response;
  42   }
  43 }
  44
  45 class ClosureMiddleware extends Middleware {
  46   private $closure;
  47
  48   public function __construct(Middleware $next,
  49                               \Closure $closure) {
  50     parent::__construct($next);
  51     $this->closure = $closure;
  52   }
  53
  54   public function execute(Request $request) {
  55     $closure = $this->closure;
  56     return $closure($request, $this->next);
  57   }
  58 }