includes/actions/ViewAction.php

   1 <?php
   2 /**
   3  * An action that views article content
   4  *
   5  * Copyright © 2012 Timo Tijhof
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  20  *
  21  * @file
  22  * @ingroup Actions
  23  * @author Timo Tijhof
  24  */
  25
  26 /**
  27  * An action that views article content
  28  *
  29  * This is a wrapper that will call Article::view().
  30  *
  31  * @ingroup Actions
  32  */
  33 class ViewAction extends FormlessAction {
  34
  35         public function getName() {
  36                 return 'view';
  37         }
  38
  39         public function onView() {
  40                 return null;
  41         }
  42
  43         public function show() {
  44                 $config = $this->context->getConfig();
  45
  46                 if (
  47                         $config->get( 'DebugToolbar' ) == false && // don't let this get stuck on pages
  48                         $this->page->checkTouched() // page exists and is not a redirect
  49                 ) {
  50                         // Include any redirect in the last-modified calculation
  51                         $redirFromTitle = $this->page->getRedirectedFrom();
  52                         if ( !$redirFromTitle ) {
  53                                 $touched = $this->page->getTouched();
  54                         } elseif ( $config->get( 'MaxRedirects' ) <= 1 ) {
  55                                 $touched = max( $this->page->getTouched(), $redirFromTitle->getTouched() );
  56                         } else {
  57                                 // Don't bother following the chain and getting the max mtime
  58                                 $touched = null;
  59                         }
  60
  61                         // If a page was purged on HTTP GET, relect that timestamp to avoid sending 304s
  62                         $touched = max( $touched, $this->page->getLastPurgeTimestamp() );
  63
  64                         // Send HTTP 304 if the IMS matches or otherwise set expiry/last-modified headers
  65                         if ( $touched && $this->getOutput()->checkLastModified( $touched ) ) {
  66                                 wfDebug( __METHOD__ . ": done 304\n" );
  67                                 return;
  68                         }
  69                 }
  70
  71                 $this->page->view();
  72         }
  73 }