chamilo-lms2/main/exercise/Hpdownload.php

<?php
/* For licensing terms, see /license.txt */
/**
*	This script shows the list of exercises for administrators and students.
*	@package chamilo.exercise
* 	@author Istvan Mandak
* 	@version $Id: Hpdownload.php 22201 2009-07-17 19:57:03Z cfasanando $
*/
/**
 * Code
 */
session_cache_limiter('public');

//require_once '../inc/global.inc.php';
$this_section=SECTION_COURSES;

$tbl_document = Database::get_course_table(TABLE_DOCUMENT);

$doc_url=str_replace(array('../','\\..','\\0','..\\'),array('','','',''),urldecode($_GET['doc_url']));
$filename=basename($doc_url);

// launch event
//Event::event_download($doc_url);
if (isset($_course['path'])) {
    $course_path = api_get_path(SYS_COURSE_PATH).$_course['path'].'/document';
	$full_file_name = $course_path.Security::remove_XSS($doc_url);
} else {
    $course_path = api_get_path(SYS_COURSE_PATH).$cid.'/document';
	$full_file_name = $course_path.Security::remove_XSS($doc_url);
}

if(!is_file($full_file_name)) {
	exit;
}

if (!Security::check_abs_path($full_file_name, $course_path.'/')) {
    exit;
}

$extension=explode('.',$filename);
$extension=strtolower($extension[sizeof($extension)-1]);

switch($extension) {
	case 'gz':		$content_type='application/x-gzip';			break;
	case 'zip':		$content_type='application/zip';			break;
	case 'pdf':		$content_type='application/pdf';			break;
	case 'png':		$content_type='image/png';					break;
	case 'gif':		$content_type='image/gif';					break;
	case 'jpg':		$content_type='image/jpeg';					break;
	case 'txt':		$content_type='text/plain';					break;
	case 'htm':		$content_type='text/html';					break;
	case 'html':	$content_type='text/html';					break;
	default:		$content_type='application/octet-stream';	break;
}

header('Content-disposition: filename='.$filename);
header('Content-Type: '.$content_type);
header('Expires: '.gmdate('D, d M Y H:i:s',time()+10).' GMT');
header('Last-Modified: '.gmdate('D, d M Y H:i:s',time()+10).' GMT');

/*
	Dynamic parsing section
	is activated whenever a user views an html file
	work in progress
	- question: we could also parse per line,
	perhaps this would be faster.
	($file_content = file($full_file_name) returns file in array)
*/

if ($content_type == 'text/html') {
	$directory_name = dirname($full_file_name);

	$dir = str_replace(
		array('\\', api_get_path(SYS_COURSE_PATH) . $_course['path'] . '/document'), array('/', ''),
		$directory_name
	);

	if($dir[strlen($dir)-1] != '/') {
		$dir.='/';
    }

	//Parse whole file at one
	$fp = fopen($full_file_name, "r");
	$file_content = fread ($fp, filesize ($full_file_name));
	fclose($fp);


    $exercisePath = api_get_self();
  	$exfile = explode('/',$exercisePath);
  	$exfile = $exfile[sizeof($exfile)-1];
  	$exercisePath = substr($exercisePath,0,strpos($exercisePath,$exfile));
  	$exercisePath = $exercisePath;

		$content = $file_content;
		$mit = "function Finish(){";

		$js_content = "var SaveScoreVariable = 0; // This variable included by Dokeos System\n".
		"function mySaveScore() // This function included by Dokeos System\n".
"{\n".
"   if (SaveScoreVariable==0)\n".
"		{\n".
"			SaveScoreVariable = 1;\n".
"			if (C.ie)\n".
"			{\n".
"				document.location.href = \"".$exercisePath."savescores.php?origin=$origin&time=$time&test=".$doc_url."&uid=".$_user['user_id']."&cid=".$cid."&score=\"+Score;\n".
"				//window.alert(Score);\n".
"			}\n".
"			else\n".
"			{\n".
"			}\n".
"		}\n".
"}\n".
"// Must be included \n".
"function Finish(){\n".
" mySaveScore();";
	$newcontent = str_replace($mit,$js_content,$content);

	$prehref="javascript:void(0);";
	$posthref = api_get_path(WEB_CODE_PATH) . "main/exercise/Hpdownload.php?doc_url=".$doc_url."&cid=".$cid."&uid=".$uid;
	$newcontent = str_replace($prehref,$posthref,$newcontent);


	$prehref="class=\"GridNum\" onclick=";
	$posthref="class=\"GridNum\" onMouseover=";
	$newcontent = str_replace($prehref,$posthref,$newcontent);
	header('Content-length: '.strlen($newcontent));
	// Dipsp.
	echo $newcontent;
	exit();
}

//normal case, all non-html files
//header('Content-length: '.filesize($full_file_name));
$fp=fopen($full_file_name,'rb');
fpassthru($fp);
fclose($fp);
?>