go.php

   1 <?php
   2 /****************************************************************/
   3 /* ATutor                                                                                                               */
   4 /****************************************************************/
   5 /* Copyright (c) 2002-2008 by Greg Gay & Joel Kronenberg        */
   6 /* Adaptive Technology Resource Centre / University of Toronto  */
   7 /* http://atutor.ca                                             */
   8 /*                                                              */
   9 /* This program is free software. You can redistribute it and/or*/
  10 /* modify it under the terms of the GNU General Public License  */
  11 /* as published by the Free Software Foundation.                                */
  12 /****************************************************************/
  13 // $Id$
  14
  15 define('AT_INCLUDE_PATH', 'include/');
  16 define('AT_REDIRECT_LOADED', true);
  17
  18 $_user_location = 'public';  //like browse, and registration, doesn't need username/passwords to get into
  19
  20 require_once(AT_INCLUDE_PATH . 'classes/UrlRewrite/UrlParser.class.php');
  21 include_once(AT_INCLUDE_PATH.'config.inc.php');
  22 require_once(AT_INCLUDE_PATH.'lib/constants.inc.php');
  23 require_once(AT_INCLUDE_PATH.'lib/mysql_connect.inc.php');
  24 //require_once(AT_INCLUDE_PATH.'vitals.inc.php');
  25
  26 //mimic config variables, vitals.inc.php 135-140
  27 /* get config variables. if they're not in the db then it uses the installation default value in constants.inc.php */
  28 $sql    = "SELECT * FROM ".TABLE_PREFIX."config";
  29 $result = mysql_query($sql, $db);
  30 while ($row = mysql_fetch_assoc($result)) {
  31         $_config[$row['name']] = $row['value'];
  32 }
  33
  34 //Get path info
  35 $pathinfo = getPathInfo();
  36
  37 $url_parser = new UrlParser($pathinfo);
  38 $path_array =  $url_parser->getPathArray();
  39 $_pretty_url_course_id = $path_array[0];
  40 $obj = $path_array[1];
  41
  42 if (!$obj->isEmpty()){
  43         /*
  44          * Addresses the issue for relative uri
  45          * @refer to constants.inc.php $_rel_link
  46          */
  47         $_rel_url = $obj->redirect();
  48         $var_query = $obj->parsePrettyQuery();
  49         save2Get($var_query);   //remake all the _GET and _REQUEST variables so that the vitals can use it
  50
  51         $_user_location = '';   //reset user_location so that the vital file in each page would validate
  52         $pretty_current_page = $obj->getPage();
  53         //If page not found, forward back to index.php
  54         //ignore error, cause it will give a warning: No such file error, and can't send header.
  55         if (!@include($pretty_current_page)){
  56                 header('Location: '.AT_BASE_HREF.'index.php');
  57                 exit;
  58         }
  59 } elseif ($_pretty_url_course_id==0) {
  60         //TODO: $_SESSION[course_id] seems to be resetted to 0, causing vitals.inc.php line 273 to redirect incorrectly.
  61         //              Need to find out where exactly the course_id is being resetted.
  62         return;
  63 //      header('location: '.AT_BASE_HREF.'bounce.php?course=0');
  64 //      exit;
  65 } elseif ($_pretty_url_course_id != ''){
  66         header('location: '.AT_BASE_HREF.'bounce.php?course='.$_pretty_url_course_id);
  67         exit;
  68 }
  69
  70
  71 /**
  72  * This function will reconstruct all the $_GET variables.
  73  * @param       array   consist of all the pathinfo variables in querystring format
  74  */
  75 function save2Get($var_query){
  76         if (empty($var_query) || !is_array($var_query))
  77                 return;
  78         foreach($var_query as $k=>$v){
  79                 if ($k=='page_to_load'){
  80                         continue;
  81                 }
  82
  83                 //If mod_rewrite is on, the page# will be shown as <page#>.html.
  84                 //in this case, parse the page number out.
  85                 if ($k=='page'){
  86                         if (preg_match('/(.*)\.html$/', $v, $matches)==1){
  87                                 $v = $matches[1];
  88                         }
  89                 }
  90                 $_GET[$k] = $v;
  91                 $_REQUEST[$k] = $v;
  92         }
  93 }
  94
  95 /**
  96  * Get path info
  97  * @return the path info string
  98  */
  99 function getPathInfo(){
 100         //Handles path_info in diff versions of PHP
 101         if(isset($_SERVER['ORIG_PATH_INFO']) && $_SERVER['ORIG_PATH_INFO']!=''){
 102                 //if both PATH_INFO and ORIG_PATH_INFO are set, then decide which to use by str ops.
 103                 if (isset($_SERVER['PATH_INFO'])){
 104                         $pathpos = strpos($_SERVER['ORIG_PATH_INFO'], $_SERVER['SCRIPT_NAME']);
 105                         $pathlen = strlen($_SERVER['SCRIPT_NAME']);
 106                         if (substr($_SERVER['ORIG_PATH_INFO'], $pathpos + $pathlen) == $_SERVER['PATH_INFO']){
 107                                 return $_SERVER['PATH_INFO'];
 108                         }
 109                 }
 110                 return $_SERVER['ORIG_PATH_INFO'];
 111         } else {
 112                 return $_SERVER['PATH_INFO'];
 113         }
 114 }
 115 ?>