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         /**
  30          * @param $err string
  31          */
  32         private function XMLerror( $err = "Invalid request." ) {
  33                 header( "HTTP/1.0 400 Bad Request" );
  34                 header( "Content-Type: application/xml; charset=utf-8" );
  35                 echo <<<XML
  36 <?xml version="1.0" encoding="utf-8"?>
  37 <response>
  38         <error>1</error>
  39         <message>Invalid request: $err</message>
  40 </response>
  41 XML;
  42                         exit;
  43         }
  44
  45         public function __construct() {
  46                 global $wgUseTrackbacks, $wgRequest;
  47
  48                 if( !$wgUseTrackbacks )
  49                         $this->XMLerror( "Trackbacks are disabled" );
  50
  51                 $this->r = $wgRequest;
  52
  53                 if( !$this->r->wasPosted() ) {
  54                         $this->XMLerror( "Must be posted" );
  55                 }
  56
  57                 $this->url = $wgRequest->getText( 'url' );
  58                 $article = $wgRequest->getText( 'article' );
  59
  60                 if( !$this->url || !$article ) {
  61                         $this->XMLerror( "Required field not specified" );
  62                 }
  63
  64                 $this->title = Title::newFromText( $article );
  65                 if( !$this->title || !$this->title->exists() ) {
  66                         $this->XMLerror( "Specified article does not exist." );
  67                 }
  68         }
  69
  70         public function write() {
  71                 $dbw = wfGetDB( DB_MASTER );
  72
  73                 $tbtitle = $this->r->getText( 'title' );
  74                 $tbex = $this->r->getText( 'excerpt' );
  75                 $tbname = $this->r->getText( 'blog_name' );
  76
  77                 $dbw->insert('trackbacks', array(
  78                         'tb_page'       => $this->title->getArticleID(),
  79                         'tb_title'      => $tbtitle,
  80                         'tb_url'        => $this->url,
  81                         'tb_ex'         => $tbex,
  82                         'tb_name'       => $tbname
  83                 ));
  84
  85                 $dbw->commit();
  86
  87                 $this->XMLsuccess();
  88         }
  89 }
  90
  91 $tb = new TrackBack();
  92 $tb->write();