includes/AjaxDispatcher.php

   1 <?php
   2
   3 if( !defined( 'MEDIAWIKI' ) )
   4         die( 1 );
   5
   6 if ( ! $wgUseAjax ) {
   7         die( 1 );
   8 }
   9
  10 require_once( 'AjaxFunctions.php' );
  11
  12 /**
  13  * @todo Document - e.g. Provide top-level description of this class.
  14  * @addtogroup Ajax
  15  */
  16 class AjaxDispatcher {
  17         var $mode;
  18         var $func_name;
  19         var $args;
  20
  21         function __construct() {
  22                 wfProfileIn( __METHOD__ );
  23
  24                 $this->mode = "";
  25
  26                 if (! empty($_GET["rs"])) {
  27                         $this->mode = "get";
  28                 }
  29
  30                 if (!empty($_POST["rs"])) {
  31                         $this->mode = "post";
  32                 }
  33
  34                 if ($this->mode == "get") {
  35                         $this->func_name = isset( $_GET["rs"] ) ? $_GET["rs"] : '';
  36                         if (! empty($_GET["rsargs"])) {
  37                                 $this->args = $_GET["rsargs"];
  38                         } else {
  39                                 $this->args = array();
  40                         }
  41                 } else {
  42                         $this->func_name = isset( $_POST["rs"] ) ? $_POST["rs"] : '';
  43                         if (! empty($_POST["rsargs"])) {
  44                                 $this->args = $_POST["rsargs"];
  45                         } else {
  46                                 $this->args = array();
  47                         }
  48                 }
  49                 wfProfileOut( __METHOD__ );
  50         }
  51
  52         function performAction() {
  53                 global $wgAjaxExportList, $wgOut;
  54
  55                 if ( empty( $this->mode ) ) {
  56                         return;
  57                 }
  58                 wfProfileIn( __METHOD__ );
  59
  60                 if (! in_array( $this->func_name, $wgAjaxExportList ) ) {
  61                         wfHttpError( 400, 'Bad Request',
  62                                 "unknown function " . (string) $this->func_name );
  63                 } else {
  64                         try {
  65                                 $result = call_user_func_array($this->func_name, $this->args);
  66
  67                                 if ( $result === false || $result === NULL ) {
  68                                         wfHttpError( 500, 'Internal Error',
  69                                                 "{$this->func_name} returned no data" );
  70                                 }
  71                                 else {
  72                                         if ( is_string( $result ) ) {
  73                                                 $result= new AjaxResponse( $result );
  74                                         }
  75
  76                                         $result->sendHeaders();
  77                                         $result->printText();
  78                                 }
  79
  80                         } catch (Exception $e) {
  81                                 if (!headers_sent()) {
  82                                         wfHttpError( 500, 'Internal Error',
  83                                                 $e->getMessage() );
  84                                 } else {
  85                                         print $e->getMessage();
  86                                 }
  87                         }
  88                 }
  89
  90                 wfProfileOut( __METHOD__ );
  91                 $wgOut = null;
  92         }
  93 }
  94
  95 ?>