includes/actions/ViewAction.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  16  *
  17  * @file
  18  * @ingroup Actions
  19  */
  20
  21 /**
  22  * An action that views article content
  23  *
  24  * This is a wrapper that will call Article::view().
  25  *
  26  * @ingroup Actions
  27  */
  28 class ViewAction extends FormlessAction {
  29
  30         public function getName() {
  31                 return 'view';
  32         }
  33
  34         public function onView() {
  35                 return null;
  36         }
  37
  38         public function show() {
  39                 $config = $this->context->getConfig();
  40
  41                 if (
  42                         $config->get( 'DebugToolbar' ) == false && // don't let this get stuck on pages
  43                         $this->page->checkTouched() // page exists and is not a redirect
  44                 ) {
  45                         // Include any redirect in the last-modified calculation
  46                         $redirFromTitle = $this->page->getRedirectedFrom();
  47                         if ( !$redirFromTitle ) {
  48                                 $touched = $this->page->getTouched();
  49                         } elseif ( $config->get( 'MaxRedirects' ) <= 1 ) {
  50                                 $touched = max( $this->page->getTouched(), $redirFromTitle->getTouched() );
  51                         } else {
  52                                 // Don't bother following the chain and getting the max mtime
  53                                 $touched = null;
  54                         }
  55
  56                         // Send HTTP 304 if the IMS matches or otherwise set expiry/last-modified headers
  57                         if ( $touched && $this->getOutput()->checkLastModified( $touched ) ) {
  58                                 wfDebug( __METHOD__ . ": done 304\n" );
  59                                 return;
  60                         }
  61                 }
  62
  63                 $this->page->view();
  64         }
  65 }