| Current File : //etc/zpanel/panel/etc/apps/filemanager_hold/fetchscript.php |
<?php
/**
* This file is used to send gzipped Javascripts and Stylesheets to the browser
*
* It expects three parameters:
*
* gzip (can be 1 or 0, for yes or no; default: 0)
* subdir[INDEX] (relative directory from /components/com_virtuemart/js)
* file[INDEX] (filename only)
* where INDEX is the actual number of the file to be included, so you can include multiple scripts at a time
*
* @version $Id: fetchscript.php 196 2011-06-14 08:00:04Z soeren $
* @package eXtplorer
* @copyright Copyright (C) 2006-2007 Soeren Eberhardt. All rights reserved.
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL, see LICENSE.php
* VirtueMart is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
*
* http://virtuemart.net
*/
/**
* Initialise GZIP
* @author Mambo / Joomla Project
*/
function initGzip() {
global $do_gzip_compress;
$gzip = isset( $_GET['gzip'] ) ? (boolean)$_GET['gzip'] : false;
$do_gzip_compress = FALSE;
if ($gzip) {
$phpver = phpversion();
$useragent = isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : '';
$canZip = isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ? $_SERVER['HTTP_ACCEPT_ENCODING'] : '';
$gzip_check = 0;
$zlib_check = 0;
$gz_check = 0;
$zlibO_check = 0;
$sid_check = 0;
if ( strpos( $canZip, 'gzip' ) !== false) {
$gzip_check = 1;
}
if ( extension_loaded( 'zlib' ) ) {
$zlib_check = 1;
}
if ( function_exists('ob_gzhandler') ) {
$gz_check = 1;
}
if ( ini_get('zlib.output_compression') ) {
$zlibO_check = 1;
}
if ( $phpver >= '4.0.4pl1' && ( strpos($useragent,'compatible') !== false || strpos($useragent,'Gecko') !== false ) ) {
// Check for gzip header or norton internet securities
if ( ( $gzip_check || isset( $_SERVER['---------------']) ) && $zlib_check && $gz_check && !$zlibO_check ) {
// You cannot specify additional output handlers if
// zlib.output_compression is activated here
ob_start( 'ob_gzhandler' );
return;
}
} else if ( $phpver > '4.0' ) {
if ( $gzip_check ) {
if ( $zlib_check ) {
$do_gzip_compress = TRUE;
ob_start();
ob_implicit_flush(0);
header( 'Content-Encoding: gzip' );
return;
}
}
}
}
ob_start();
}
/**
* Perform GZIP
* @author Mambo / Joomla! project
*/
function doGzip() {
global $do_gzip_compress;
if ( $do_gzip_compress ) {
/**
*Borrowed from php.net!
*/
$gzip_contents = ob_get_contents();
ob_end_clean();
$gzip_size = strlen($gzip_contents);
$gzip_crc = crc32($gzip_contents);
$gzip_contents = gzcompress($gzip_contents, 9);
$gzip_contents = substr($gzip_contents, 0, strlen($gzip_contents) - 4);
echo "\x1f\x8b\x08\x00\x00\x00\x00\x00";
echo $gzip_contents;
echo pack('V', $gzip_crc);
echo pack('V', $gzip_size);
} else {
ob_end_flush();
}
}
/**
* This function fixes the URLs used in the CSS file
* This is necessary, because this file is (usually) located somewhere else than the CSS file! That makes
* relative URL references point to wrong directories - so we need to fix that!
*/
function cssUrl( $ref, $subdir ) {
$ref = str_replace( "'", '', stripslashes( $ref ));
$ref = trim( str_replace( '"', '', $ref) );
// Absolute References don't need to be fixed
if( substr( $ref, 0, 4 ) == 'http' ) {
return 'url( "'. $ref.'" )';
}
chdir( dirname( __FILE__ ).'/'.$subdir );
$ref = str_replace( dirname( __FILE__ ), '', realpath( $ref ));
$ref = str_replace( "\\", '/', $ref );
return 'url( "'. substr( $ref, 1 ).'" )';
}
/**
* Checks and sets HTTP headers for conditional HTTP requests
* Borrowed from DokuWiki (/lib/exe/fetch.php)
* @author Simon Willison <swillison@gmail.com>
* @link http://simon.incutio.com/archive/2003/04/23/conditionalGet
*/
function http_conditionalRequest($timestamp){
// A PHP implementation of conditional get, see
// http://fishbowl.pastiche.org/archives/001132.html
$last_modified = gmdate( 'D, d M Y H:i:s', $timestamp ) . ' GMT';
$etag = '"'.md5($last_modified).'"';
// Send the headers
header("Last-Modified: $last_modified");
header("ETag: $etag");
// See if the client has provided the required headers
$if_modified_since = isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ?
stripslashes($_SERVER['HTTP_IF_MODIFIED_SINCE']) :
false;
$if_none_match = isset($_SERVER['HTTP_IF_NONE_MATCH']) ?
stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) :
false;
if (!$if_modified_since && !$if_none_match) {
return;
}
// At least one of the headers is there - check them
if ($if_none_match && $if_none_match != $etag) {
return; // etag is there but doesn't match
}
if ($if_modified_since && $if_modified_since != $last_modified) {
return; // if-modified-since is there but doesn't match
}
// Nothing has changed since their last request - serve a 304 and exit
header('HTTP/1.0 304 Not Modified');
exit;
}
initGzip();
$base_dir = dirname( __FILE__ );
$subdirs = @$_GET['subdir'];
if( !is_array( $subdirs ) && !empty( $subdirs )) {
$subdirs = array( $subdirs );
}
$files = @$_GET['file'];
if( !is_array( $files ) && !empty( $files )) {
$files = array( $files );
}
if( empty( $files ) || sizeof($files) != sizeof( $subdirs )) {
header("HTTP/1.0 400 Bad Request");
echo 'Bad request';
exit;
}
$countFiles = sizeof($files);
$newest_mdate = 0;
for( $i = 0; $i < $countFiles; $i++ ) {
if( empty( $files[$i] )) continue;
$file = $files[$i];
$subdir = $subdirs[$i];
$dir = realpath( $base_dir . '/' . $subdir );
$file = $dir . '/' . basename( $file );
if( !file_exists( $file ) || (!stristr( $dir, $base_dir ) && !stristr( $dir, "/usr/share/javascript") && !stristr( $dir, "/usr/share/yui")) ) {
if( $countFiles == 1 ) {
header("HTTP/1.0 404 Not Found");
echo 'Not Found';
exit;
}
continue;
}
$newest_mdate = max( filemtime( $file ), $newest_mdate );
}
// This function quits the page load if the browser has a cached version of the requested script.
// It then returns a 304 Not Modified header
http_conditionalRequest( $newest_mdate );
// here we need to send the script or stylesheet
$processed_files = 0;
for( $i = 0; $i < $countFiles; $i++ ) {
$file = addslashes($files[$i]);// fix by colonelxc
$subdir = $subdirs[$i];
$dir = realpath( $base_dir . '/' . $subdir );
$file = $dir . '/' . basename( $file );
if( !file_exists( $file ) || (!stristr( $dir, $base_dir ) && !stristr( $dir, "/usr/share/javascript") && !stristr( $dir, "/usr/share/yui")) || !is_readable( $file )) {
continue;
}
$processed_files++;
$fileinfo = pathinfo( $file );
switch ( $fileinfo['extension']) {
case 'css':
$mime_type = 'text/css';
header( 'Content-Type: '.$mime_type.';');
$css = implode( '', file( $file ));
$str_css = preg_replace("/url\((.+?)\)/ie","cssUrl('\\1', '$subdir')", $css);
echo $str_css;
break;
case 'js':
$mime_type = 'application/x-javascript';
header( 'Content-Type: '.$mime_type.';');
readfile( $file );
break;
default:
continue;
}
}
if( $processed_files == 0 ) {
if( !file_exists( $file ) ) {
header("HTTP/1.0 404 Not Found");
echo 'Not Found';
exit;
}
if( !is_readable( $file ) ) {
header("HTTP/1.0 500 Internal Server Error");
echo "Could not read ".basename($file)." - bad permissions?";
exit;
}
}
// Tell the user agent to cache this script/stylesheet for an hour
$age = 3600;
header( 'Expires: '.gmdate( 'D, d M Y H:i:s', time()+ $age ) . ' GMT' );
header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', @filemtime( $file ) ) . ' GMT' );
header( 'Cache-Control: public, max-age='.$age.', must-revalidate, post-check=0, pre-check=0' );
header( 'Pragma: public' );
doGzip();
exit;
?>