<?php
/******
*
* EditArea PHP compressor
* Developped by Christophe Dolivet
* Released under LGPL, Apache and BSD licenses
* v1.1.3 (2007/01/18)
*
******/
// CONFIG
$param['cache_duration']= 3600 * 24 * 10; // 10 days util client cache expires
$param['compress'] = true; // enable the code compression, should be activated but it can be usefull to desactivate it for easier error retrieving (true or false)
$param['debug'] = false; // Enable this option if you need debuging info
$param['use_disk_cache']= true; // If you enable this option gzip files will be cached on disk.
$param['use_gzip']= true; // Enable gzip compression
// END CONFIG
$compressor= new Compressor($param);
class Compressor{
function compressor($param)
{
$this->__construct($param);
}
function __construct($param)
{
$this->start_time= $this->get_microtime();
$this->file_loaded_size=0;
$this->param= $param;
$this->script_list="";
$this->path= dirname(__FILE__)."/";
if(isset($_GET['plugins'])){
$this->load_all_plugins= true;
$this->full_cache_file= $this->path."edit_area_full_with_plugins.js";
$this->gzip_cache_file= $this->path."edit_area_full_with_plugins.gz";
}else{
$this->load_all_plugins= false;
$this->full_cache_file= $this->path."edit_area_full.js";
$this->gzip_cache_file= $this->path."edit_area_full.gz";
}
$this->check_gzip_use();
$this->send_headers();
$this->check_cache();
$this->load_files();
$this->send_datas();
}
function send_headers()
{
header("Content-type: text/javascript; charset: UTF-8");
header("Vary: Accept-Encoding"); // Handle proxies
header(sprintf("Expires: %s GMT", gmdate("D, d M Y H:i:s", time() + $this->param['cache_duration'])) );
if($this->use_gzip)
header("Content-Encoding: ".$this->gzip_enc_header);
}
function check_gzip_use()
{
$encodings = array();
$desactivate_gzip=false;
if (isset($_SERVER['HTTP_ACCEPT_ENCODING']))
$encodings = explode(',', strtolower(preg_replace("/\s+/", "", $_SERVER['HTTP_ACCEPT_ENCODING'])));
// desactivate gzip for IE version < 7
if(preg_match("/(?:msie )([0-9.]+)/i", $_SERVER['HTTP_USER_AGENT'], $ie))
{
if($ie[1]<7)
$desactivate_gzip=true;
}
// Check for gzip header or northon internet securities
if (!$desactivate_gzip && $this->param['use_gzip'] && (in_array('gzip', $encodings) || in_array('x-gzip', $encodings) || isset($_SERVER['---------------'])) && function_exists('ob_gzhandler') && !ini_get('zlib.output_compression')) {
$this->gzip_enc_header= in_array('x-gzip', $encodings) ? "x-gzip" : "gzip";
$this->use_gzip=true;
$this->cache_file=$this->gzip_cache_file;
}else{
$this->use_gzip=false;
$this->cache_file=$this->full_cache_file;
}
}
function check_cache()
{
// Only gzip the contents if clients and server support it
if (file_exists($this->cache_file)) {
// check if cache file must be updated
$cache_date=0;
if ($dir = opendir($this->path)) {
while (($file = readdir($dir)) !== false) {
if(is_file($this->path.$file) && $file!="." && $file!="..")
$cache_date= max($cache_date, filemtime($this->path.$file));
}
closedir($dir);
}
if($this->load_all_plugins){
$plug_path= $this->path."plugins/";
if (($dir = @opendir($plug_path)) !== false)
{
while (($file = readdir($dir)) !== false)
{
if ($file !== "." && $file !== "..")
{
if(is_dir($plug_path.$file) && file_exists($plug_path.$file."/".$file.".js"))
$cache_date= max($cache_date, filemtime("plugins/".$file."/".$file.".js"));
}
}
closedir($dir);
}
}
if(filemtime($this->cache_file) >= $cache_date){
// if cache file is up to date
$last_modified = gmdate("D, d M Y H:i:s",filemtime($this->cache_file))." GMT";
if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"]) && strcasecmp($_SERVER["HTTP_IF_MODIFIED_SINCE"], $last_modified) === 0)
{
header("HTTP/1.1 304 Not Modified");
header("Last-modified: ".$last_modified);
header("Cache-Control: Public"); // Tells HTTP 1.1 clients to cache
header("Pragma:"); // Tells HTTP 1.0 clients to cache
}
else
{
header("Last-modified: ".$last_modified);
header("Cache-Control: Public"); // Tells HTTP 1.1 clients to cache
header("Pragma:"); // Tells HTTP 1.0 clients to cache
header('Content-Length: '.filesize($this->cache_file));
echo file_get_contents($this->cache_file);
}
die;
}
}
return false;
}
function load_files()
{
$loader= $this->get_content("edit_area_loader.js")."\n";
// get the list of other files to load
$loader= preg_replace("/(t\.scripts_to_load=\s*)\[([^\]]*)\];/e"
, "\$this->replace_scripts('script_list', '\\1', '\\2')"
, $loader);
$loader= preg_replace("/(t\.sub_scripts_to_load=\s*)\[([^\]]*)\];/e"
, "\$this->replace_scripts('sub_script_list', '\\1', '\\2')"
, $loader);
// replace languages names
$reg_path= $this->path."reg_syntax/";
$a_displayName = array();
if (($dir = @opendir($reg_path)) !== false)
{
while (($file = readdir($dir)) !== false)
{
if( $file !== "." && $file !== ".." && ( $pos = strpos( $file, '.js' ) ) !== false )
{
$jsContent = $this->file_get_contents( $reg_path.$file );
if( preg_match( '@(\'|")DISPLAY_NAME\1\s*:\s*(\'|")(.*)\2@', $jsContent, $match ) )
{
$a_displayName[] = "'". substr( $file, 0, $pos ) ."':'". htmlspecialchars( $match[3], ENT_QUOTES ) ."'";
}
}
}
closedir($dir);
}
$loader = str_replace( '/*syntax_display_name_AUTO-FILL-BY-COMPRESSOR*/', implode( ",", $a_displayName ), $loader );
$this->datas= $loader;
$this->compress_javascript($this->datas);
// load other scripts needed for the loader
preg_match_all('/"([^"]*)"/', $this->script_list, $match);
foreach($match[1] as $key => $value)
{
$content= $this->get_content(preg_replace("/\\|\//i", "", $value).".js");
$this->compress_javascript($content);
$this->datas.= $content."\n";
}
//$this->datas);
//$this->datas= preg_replace('/(( |\t|\r)*\n( |\t)*)+/s', "", $this->datas);
// improved compression step 1/2
$this->datas= preg_replace(array("/(\b)EditAreaLoader(\b)/", "/(\b)editAreaLoader(\b)/", "/(\b)editAreas(\b)/"), array("EAL", "eAL", "eAs"), $this->datas);
//$this->datas= str_replace(array("EditAreaLoader", "editAreaLoader", "editAreas"), array("EAL", "eAL", "eAs"), $this->datas);
$this->datas.= "var editAreaLoader= eAL;var editAreas=eAs;EditAreaLoader=EAL;";
// load sub scripts
$sub_scripts="";
$sub_scripts_list= array();
preg_match_all('/"([^"]*)"/', $this->sub_script_list, $match);
foreach($match[1] as $value){
$sub_scripts_list[]= preg_replace("/\\|\//i", "", $value).".js";
}
if($this->load_all_plugins){
// load plugins scripts
$plug_path= $this->path."plugins/";
if (($dir = @opendir($plug_path)) !== false)
{
while (($file = readdir($dir)) !== false)
{
if ($file !== "." && $file !== "..")
{
if(is_dir($plug_path.$file) && file_exists($plug_path.$file."/".$file.".js"))
$sub_scripts_list[]= "plugins/".$file."/".$file.".js";
}
}
closedir($dir);
}
}
foreach($sub_scripts_list as $value){
$sub_scripts.= $this->get_javascript_content($value);
}
// improved compression step 2/2
$sub_scripts= preg_replace(array("/(\b)editAreaLoader(\b)/", "/(\b)editAreas(\b)/", "/(\b)editArea(\b)/", "/(\b)EditArea(\b)/"), array("eAL", "eAs", "eA", "EA"), $sub_scripts);
// $sub_scripts= str_replace(array("editAreaLoader", "editAreas", "editArea", "EditArea"), array("eAL", "eAs", "eA", "EA"), $sub_scripts);
$sub_scripts.= "var editArea= eA;EditArea=EA;";
// add the scripts
// $this->datas.= sprintf("editAreaLoader.iframe_script= \"<script type='text/javascript'>%s</script>\";\n", $sub_scripts);
// add the script and use a last compression
if( $this->param['compress'] )
{
$last_comp = array( 'Á' => 'this',
'Â' => 'textarea',
'Ã' => 'function',
'Ä' => 'prototype',
'Å' => 'settings',
'Æ' => 'length',
'Ç' => 'style',
'È' => 'parent',
'É' => 'last_selection',
'Ê' => 'value',
'Ë' => 'true',
'Ì' => 'false'
/*,
'Î' => '"',
'Ï' => "\n",
'À' => "\r"*/);
}
else
{
$last_comp = array();
}
$js_replace= '';
foreach( $last_comp as $key => $val )
$js_replace .= ".replace(/". $key ."/g,'". str_replace( array("\n", "\r"), array('\n','\r'), $val ) ."')";
$this->datas.= sprintf("editAreaLoader.iframe_script= \"<script type='text/javascript'>%s</script>\"%s;\n",
str_replace( array_values($last_comp), array_keys($last_comp), $sub_scripts ),
$js_replace);
if($this->load_all_plugins)
$this->datas.="editAreaLoader.all_plugins_loaded=true;\n";
// load the template
$this->datas.= sprintf("editAreaLoader.template= \"%s\";\n", $this->get_html_content("template.html"));
// load the css
$this->datas.= sprintf("editAreaLoader.iframe_css= \"<style>%s</style>\";\n", $this->get_css_content("edit_area.css"));
// $this->datas= "function editArea(){};editArea.prototype.loader= function(){alert('bouhbouh');} var a= new editArea();a.loader();";
}
function send_datas()
{
if($this->param['debug']){
$header=sprintf("/* USE PHP COMPRESSION\n");
$header.=sprintf("javascript size: based files: %s => PHP COMPRESSION => %s ", $this->file_loaded_size, strlen($this->datas));
if($this->use_gzip){
$gzip_datas= gzencode($this->datas, 9, FORCE_GZIP);
$header.=sprintf("=> GZIP COMPRESSION => %s", strlen($gzip_datas));
$ratio = round(100 - strlen($gzip_datas) / $this->file_loaded_size * 100.0);
}else{
$ratio = round(100 - strlen($this->datas) / $this->file_loaded_size * 100.0);
}
$header.=sprintf(", reduced by %s%%\n", $ratio);
$header.=sprintf("compression time: %s\n", $this->get_microtime()-$this->start_time);
$header.=sprintf("%s\n", implode("\n", $this->infos));
$header.=sprintf("*/\n");
$this->datas= $header.$this->datas;
}
$mtime= time(); // ensure that the 2 disk files will have the same update time
// generate gzip file and cahce it if using disk cache
if($this->use_gzip){
$this->gzip_datas= gzencode($this->datas, 9, FORCE_GZIP);
if($this->param['use_disk_cache'])
$this->file_put_contents($this->gzip_cache_file, $this->gzip_datas, $mtime);
}
// generate full js file and cache it if using disk cache
if($this->param['use_disk_cache'])
$this->file_put_contents($this->full_cache_file, $this->datas, $mtime);
// generate output
if($this->use_gzip)
echo $this->gzip_datas;
else
echo $this->datas;
// die;
}
function get_content($end_uri)
{
$end_uri=preg_replace("/\.\./", "", $end_uri); // Remove any .. (security)
$file= $this->path.$end_uri;
if(file_exists($file)){
$this->infos[]=sprintf("'%s' loaded", $end_uri);
/*$fd = fopen($file, 'rb');
$content = fread($fd, filesize($file));
fclose($fd);
return $content;*/
return $this->file_get_contents($file);
}else{
$this->infos[]=sprintf("'%s' not loaded", $end_uri);
return "";
}
}
function get_javascript_content($end_uri)
{
$val=$this->get_content($end_uri);
$this->compress_javascript($val);
$this->prepare_string_for_quotes($val);
return $val;
}
function compress_javascript(&$code)
{
if($this->param['compress'])
{
// remove all comments
// (\"(?:[^\"\\]*(?:\\\\)*(?:\\\"?)?)*(?:\"|$))|(\'(?:[^\'\\]*(?:\\\\)*(?:\\'?)?)*(?:\'|$))|(?:\/\/(?:.|\r|\t)*?(\n|$))|(?:\/\*(?:.|\n|\r|\t)*?(?:\*\/|$))
$code= preg_replace("/(\"(?:[^\"\\\\]*(?:\\\\\\\\)*(?:\\\\\"?)?)*(?:\"|$))|(\'(?:[^\'\\\\]*(?:\\\\\\\\)*(?:\\\\\'?)?)*(?:\'|$))|(?:\/\/(?:.|\r|\t)*?(\n|$))|(?:\/\*(?:.|\n|\r|\t)*?(?:\*\/|$))/s", "$1$2$3", $code);
// remove line return, empty line and tabulation
$code= preg_replace('/(( |\t|\r)*\n( |\t)*)+/s', " ", $code);
// add line break before "else" otherwise navigators can't manage to parse the file
$code= preg_replace('/(\b(else)\b)/', "\n$1", $code);
// remove unnecessary spaces
$code= preg_replace('/( |\t|\r)*(;|\{|\}|=|==|\-|\+|,|\(|\)|\|\||&\&|\:)( |\t|\r)*/', "$2", $code);
}
}
function get_css_content($end_uri){
$code=$this->get_content($end_uri);
// remove comments
$code= preg_replace("/(?:\/\*(?:.|\n|\r|\t)*?(?:\*\/|$))/s", "", $code);
// remove spaces
$code= preg_replace('/(( |\t|\r)*\n( |\t)*)+/s', "", $code);
// remove spaces
$code= preg_replace('/( |\t|\r)?(\:|,|\{|\})( |\t|\r)+/', "$2", $code);
$this->prepare_string_for_quotes($code);
return $code;
}
function get_html_content($end_uri){
$code=$this->get_content($end_uri);
//$code= preg_replace('/(\"(?:\\\"|[^\"])*(?:\"|$))|' . "(\'(?:\\\'|[^\'])*(?:\'|$))|(?:\/\/(?:.|\r|\t)*?(\n|$))|(?:\/\*(?:.|\n|\r|\t)*?(?:\*\/|$))/s", "$1$2$3", $code);
$code= preg_replace('/(( |\t|\r)*\n( |\t)*)+/s', " ", $code);
$this->prepare_string_for_quotes($code);
return $code;
}
function prepare_string_for_quotes(&$str){
// prepare the code to be putted into quotes
/*$pattern= array("/(\\\\)?\"/", '/\\\n/' , '/\\\r/' , "/(\r?\n)/");
$replace= array('$1$1\\"', '\\\\\\n', '\\\\\\r' , '\\\n"$1+"');*/
$pattern= array("/(\\\\)?\"/", '/\\\n/' , '/\\\r/' , "/(\r?\n)/");
if($this->param['compress'])
$replace= array('$1$1\\"', '\\\\\\n', '\\\\\\r' , '\n');
else
$replace= array('$1$1\\"', '\\\\\\n', '\\\\\\r' , "\\n\"\n+\"");
$str= preg_replace($pattern, $replace, $str);
}
function replace_scripts($var, $param1, $param2)
{
$this->$var=stripslashes($param2);
return $param1."[];";
}
/* for php version that have not thoses functions */
function file_get_contents($file)
{
$fd = fopen($file, 'rb');
$content = fread($fd, filesize($file));
fclose($fd);
$this->file_loaded_size+= strlen($content);
return $content;
}
function file_put_contents($file, &$content, $mtime=-1)
{
if($mtime==-1)
$mtime=time();
$fp = @fopen($file, "wb");
if ($fp) {
fwrite($fp, $content);
fclose($fp);
touch($file, $mtime);
return true;
}
return false;
}
function get_microtime()
{
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
}
?>