trackback.php

   1 <?php
   2 /**
   3  * Provide functions to handle article trackbacks.
   4  * @file
   5  * @ingroup SpecialPage
   6  */
   7
   8 if ( isset( $_SERVER['MW_COMPILED'] ) ) {
   9         require ( 'phase3/includes/WebStart.php' );
  10 } else {
  11         require ( dirname( __FILE__ ) . '/includes/WebStart.php' );
  12 }
  13
  14 class TrackBack {
  15
  16         private $r, $url, $title = null;
  17
  18         private function XMLsuccess() {
  19                 header( "Content-Type: application/xml; charset=utf-8" );
  20                 echo <<<XML
  21 <?xml version="1.0" encoding="utf-8"?>
  22 <response>
  23         <error>0</error>
  24 </response>
  25 XML;
  26                 exit;
  27         }
  28
  29         private function XMLerror( $err = "Invalid request." ) {
  30                 header( "HTTP/1.0 400 Bad Request" );
  31                 header( "Content-Type: application/xml; charset=utf-8" );
  32                 echo <<<XML
  33 <?xml version="1.0" encoding="utf-8"?>
  34 <response>
  35         <error>1</error>
  36         <message>Invalid request: $err</message>
  37 </response>
  38 XML;
  39                         exit;
  40         }
  41
  42         public function __construct() {
  43                 global $wgUseTrackbacks, $wgRequest;
  44
  45                 if( !$wgUseTrackbacks )
  46                         $this->XMLerror( "Trackbacks are disabled" );
  47
  48                 $this->r = $wgRequest;
  49
  50                 if( !$this->r->wasPosted() ) {
  51                         $this->XMLerror( "Must be posted" );
  52                 }
  53
  54                 $this->url = $wgRequest->getText( 'url' );
  55                 $article = $wgRequest->getText( 'article' );
  56
  57                 if( !$this->url || !$article ) {
  58                         $this->XMLerror( "Required field not specified" );
  59                 }
  60
  61                 $this->title = Title::newFromText( $article );
  62                 if( !$this->title || !$this->title->exists() ) {
  63                         $this->XMLerror( "Specified article does not exist." );
  64                 }
  65         }
  66
  67         public function write() {
  68                 $dbw = wfGetDB( DB_MASTER );
  69
  70                 $tbtitle = $this->r->getText( 'title' );
  71                 $tbex = $this->r->getText( 'excerpt' );
  72                 $tbname = $this->r->getText( 'blog_name' );
  73
  74                 $dbw->insert('trackbacks', array(
  75                         'tb_page'       => $this->title->getArticleID(),
  76                         'tb_title'      => $tbtitle,
  77                         'tb_url'        => $this->url,
  78                         'tb_ex'         => $tbex,
  79                         'tb_name'       => $tbname
  80                 ));
  81
  82                 $dbw->commit();
  83
  84                 $this->XMLsuccess();
  85         }
  86 }
  87
  88 $tb = new TrackBack();
  89 $tb->write();