compressor

# Default options. Allways available in apache2.
Options +FollowSymLinks
AddDefaultCharset utf-8
LimitRequestBody 10240000
#@todo: ETag Not-Modified implementeren
FileETag none

#ErrorDocument 400 400.php
#ErrorDocument 401 401.php
#ErrorDocument 402 402.php
#ErrorDocument 403 403.php
#ErrorDocument 404 404.php

#mod specific improvements.
<IfModule mod_rewrite.c>
    RewriteEngine On
    
    #SEO: altijd www gebruiken.
    RewriteCond %{HTTP_HOST} ^jedomein.nl [NC]
    RewriteRule ^(.*)$ http://www.jedomein.nl/$1 [L,R=301]
    
    #css/js compressing
    RewriteRule _css/(.+).css$ compress.php?type=css&file=$1.css
    RewriteRule _js/(.+).js$ compress.php?type=js&file=$1.js
    
    #ales naar index.php, op 'echte' bestanden na - zelf implementeren.
    #RewriteCond %{REQUEST_FILENAME} !-f
    #RewriteCond %{REQUEST_FILENAME} !-d
    #RewriteRule . index.php [L]
</IfModule>

<IfModule mod_deflate.c>
    #gzip compressie
    SetOutputFilter DEFLATE
    BrowserMatch ^Mozilla/4 gzip-only-text/html
    BrowserMatch ^Mozilla/4\.0[678] no-gzip
    BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html
    SetEnvIfNoCase Request_URI \
        \.(?:gif|jpe?g|png|swf|pdf|zip|flv)$ no-gzip dont-vary
</IfModule>

<IfModule mod_gzip.c>
    mod_gzip_on Yes

    mod_gzip_item_include mime ^application/x-javascript$
    mod_gzip_item_include mime ^application/json$
    mod_gzip_item_include mime ^text/.*$

    mod_gzip_item_include file \.html$
    mod_gzip_item_include file \.php$
    mod_gzip_item_include file \.js$
    mod_gzip_item_include file \.css$
    mod_gzip_item_include file \.txt$
    mod_gzip_item_include file \.xml$
    mod_gzip_item_include file \.json$
    <IfModule mod_header.c>
        Header append Vary Accept-Encoding
    </IfModule>
</IfModule>

<IfModule mod_expires.c>
    #cache rules to decrease data traffic
    ExpiresActive On
    ExpiresDefault A0
    <FilesMatch "\.(gif|jpg|jpeg|png|swf)$">
      ExpiresDefault A604800
    </FilesMatch>
</IfModule>

<IfModule mod_header.c>
    #cache rules to decrease data traffic
    Header append Vary User-Agent env=!dont-vary
        
    <FilesMatch "\.(php|html|htm)$">
       Header set imagetoolbar "no"
    </FilesMatch>
</IfModule>

<?php

/**
 * Compressing/caching can take some time.
 */
ini_set( "max_time_limit", 120 );
ini_set( "memory_limit", "32M" );

require_once "_lib/Minifier.php";

$types = array(
    "js" => "JSMinifier",
    "css" => "CSSMinifier"
);

if( isset( $_GET['type'] ) && array_key_exists( $_GET['type'], $types ) && !empty( $_GET['file'] ) ) {
    $compress = new $types[$_GET['type']]( $_GET['file'] );
    echo $compress->getOutput();
}

?>

<?php
/**
 * Minifier for CSS and JS files. For file combining use this notation: _js/file1.js:file2.js:file3.js
 *
 */
abstract class Minifier {

    /**
     * Output buffer.
     *
     * @var string
     */
    private $output = "";

    /**
     * Absolute path.
     *
     * @var string
     */
    private $cwd;
    
    /**
     * Default expire time for browser.
     *
     * @var integer
     */
    private $expire = 180000;

    /**
     * Allowed file types.
     */
    const TYPE_JS = "js";
    const TYPE_CSS = "css";
    
    /**
     * Use compression?
     *
     */
    const USE_COMPRESSION = true;

    /**
     * Content types for header() usage.
     *
     * @var array
     */
    private $contentTypes = array(
        self::TYPE_JS => "javascript",
        self::TYPE_CSS => "css"
    );
    
    /**
     * Files to combine compress.
     *
     * @var array
     */
    private $files = array();

    /**
     * Compressor initializer
     *
     */
    public function __construct( $file ) {
        $this->cwd = getcwd() . DIRECTORY_SEPARATOR;
        $this->files = $this->setFiles( $file );
    }
    
    /**
     * Find files to parse
     *
     * @param string $file
     * @return array
     */
    private function setFiles( $file ) {
        if( strpos( $file, ":" ) > 1 ) {
            $files = explode( ":", $file );
        }
        else {
            $files = array( $file );
        }
        return $files;
    }
    
    /**
     *    Check if the cache file still exists.
     *
     * @return bool
     */
    private function fileChanged( $file ) {
        return !is_file( $this->cacheName( $file ) );
    }
    
    /**
     *    Returns the name of the cache file
     *
     * @param bool $wildcard
     * @return string
     */
    private function cacheName($file, $wildcard = false) {
        if( !is_dir( $this->cwd . '.cache/' ) ) {
            mkdir( $this->cwd . '.cache' );
        }
        $stat = stat( $this->cwd . "_" . $this->getType() . "/" . $file );
        return $this->cwd . '.cache/' . $file . '.' . ( $wildcard ? '*' : ( $stat['size'] . '-' . $stat['mtime'] ) ) . '.cache';
    }

    /**
     * Load files and check if it has to be re-cached or the old cache file can be used.
     *
     */
    private function processFile( $file ) {
        if( file_exists( $this->cwd . "_" . $this->getType() . "/" . $file ) ) {
            if( self::USE_COMPRESSION == true ) {
                if( $this->fileChanged( $file ) ) {
                    $this->expire = -72000;
                }

                $currentCache = $this->cacheName( $file );

                // the cache exists. show it
                if( !$this->fileChanged( $file ) ) {
                    $this->output .= file_get_contents( $currentCache );
                }
                else {
                    // remove old cache files for this file
                    if ( $deadFiles = glob( $this->cacheName( $file, true ), GLOB_NOESCAPE ) ) {
                        foreach( $deadFiles as $deadFile ) {
                            unlink( $deadFile );
                        }
                    }

                    $file_content = file_get_contents( $this->cwd . "_" . $this->getType() . "/" . $file );

                    $compressed = $this->compress( $file_content );
                    file_put_contents( $currentCache, $compressed );

                    $this->output .= $compressed;
                }
            }
            else {
                $this->output .= file_get_contents( $this->cwd . "_" . $this->getType() . "/" . $file );
            }
        }
        else {
            $this->output .= "/*404 - File not found( $file )*/";
        }
        $this->output .= PHP_EOL;
    }
    
    /**
     * Method for view purposes.
     *
     */
    private function renderOutput() {
        foreach( $this->files as $file ) {
            $this->processFile( $file );
        }
    }
    
    /**
     * Send content-type header and expires header.
     *
     */
    private function sendHeaders() {
        header( 'Content-Type: text/' . $this->contentTypes[$this->getType()] . '; charset=utf-8' );
        header( 'Expires: ' . gmdate('D, d M Y H:i:s', time() + $this->expire) . ' GMT' );
    }
    
    /**
     * Parse files, send headers and return output.
     *
     * @return unknown
     */
    public function getOutput() {
        $this->renderOutput();
        $this->sendHeaders();
        return $this->output;
    }
    
    /**
     * Compress the file and return as string.
     *
     * @param string $output
     */
    abstract protected function compress( $output );

    /**
     * Returns the directory where the file must be read from.
     */
    abstract protected function getType();
}

/**
 * Class which compresses the given CSS file, and caches it.
 * The file will be cached each time it changes.
 *
 */
class CSSMinifier extends Minifier {

    protected function compress( $output ) {
        require_once "CSSMin.php";
        return CSSMin::minify( $output );
    }

    protected function getType() {
        return self::TYPE_CSS;
    }
}

/**
 * Class which compresses the given CSS file, and caches it.
 * The file will be chached each time it changes.
 *
 */
class JSMinifier extends Minifier {

    protected function compress( $output ) {
        require_once "JSMin.php";
        return JSMin::minify( $output );
    }

    protected function getType() {
        return self::TYPE_JS;
    }
}

?>

<?php

/**
 * @author Martijn!
 * @url http://www.phphulp.nl/php/scripts/1/1145/
 *
 */
class CSSMin {

    public static function minify( $css ) {
        $css = preg_replace('/\/\*.*?\*\//s', '', $css);
        $css = str_replace(array("\r", "\n", "\t"), '', $css);
        $css = preg_replace('/\s*({|}|;|:|,)\s*/', '$1', $css);

        $aMatch = array();
        
        if( preg_match_all('/{.*?}/s', $css, $aMatch) ) {
            $aMatch[0] = array_unique($aMatch[0]);

            foreach( $aMatch[0] as $k => $v ) {
                $l = strlen($v);
                if( $v[$l-2] == ';' ) {
                    $v = substr($v, 0, $l-2) . '}';
                }
                $css = str_replace($aMatch[0][$k], $v, $css);
            }
        }

        return $css;
    }
}

?>

<?php
/**
 * jsmin.php - PHP implementation of Douglas Crockford's JSMin.
 *
 * This is pretty much a direct port of jsmin.c to PHP with just a few
 * PHP-specific performance tweaks. Also, whereas jsmin.c reads from stdin and
 * outputs to stdout, this library accepts a string as input and returns another
 * string as output.
 *
 * PHP 5 or higher is required.
 *
 * Permission is hereby granted to use this version of the library under the
 * same terms as jsmin.c, which has the following license:
 *
 * --
 * Copyright (c) 2002 Douglas Crockford  (www.crockford.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * The Software shall be used for Good, not Evil.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * --
 *
 * @package JSMin
 * @author Ryan Grove <[email protected]>
 * @copyright 2002 Douglas Crockford <[email protected]> (jsmin.c)
 * @copyright 2007 Ryan Grove <[email protected]> (PHP port)
 * @license http://opensource.org/licenses/mit-license.php MIT License
 * @version 1.1.0 (2007-06-01)
 * @link http://code.google.com/p/jsmin-php/
 */

class JSMin {
  const ORD_LF    = 10;
  const ORD_SPACE = 32;

  protected $a           = '';
  protected $b           = '';
  protected $input       = '';
  protected $inputIndex  = 0;
  protected $inputLength = 0;
  protected $lookAhead   = null;
  protected $output      = array();

  // -- Public Static Methods --------------------------------------------------

  public static function minify($js) {
    $jsmin = new JSMin($js);
    return $jsmin->min();
  }

  // -- Public Instance Methods ------------------------------------------------

  public function __construct($input) {
    $this->input       = str_replace("\r\n", "\n", $input);
    $this->inputLength = strlen($this->input);
  }

  // -- Protected Instance Methods ---------------------------------------------

  protected function action($d) {
    switch($d) {
      case 1:
        $this->output[] = $this->a;

      case 2:
        $this->a = $this->b;

        if ($this->a === "'" || $this->a === '"') {
          for (;;) {
            $this->output[] = $this->a;
            $this->a        = $this->get();

            if ($this->a === $this->b) {
              break;
            }

            if (ord($this->a) <= self::ORD_LF) {
              throw new JSMinException('Unterminated string literal.');
            }

            if ($this->a === '\\') {
              $this->output[] = $this->a;
              $this->a        = $this->get();
            }
          }
        }

      case 3:
        $this->b = $this->next();

        if ($this->b === '/' && (
            $this->a === '(' || $this->a === ',' || $this->a === '=' ||
            $this->a === ':' || $this->a === '[' || $this->a === '!' ||
            $this->a === '&' || $this->a === '|' || $this->a === '?')) {

          $this->output[] = $this->a;
          $this->output[] = $this->b;

          for (;;) {
            $this->a = $this->get();

            if ($this->a === '/') {
              break;
            }
            elseif ($this->a === '\\') {
              $this->output[] = $this->a;
              $this->a        = $this->get();
            }
            elseif (ord($this->a) <= self::ORD_LF) {
              throw new JSMinException('Unterminated regular expression '.
                  'literal.');
            }

            $this->output[] = $this->a;
          }

          $this->b = $this->next();
        }
    }
  }

  protected function get() {
    $c = $this->lookAhead;
    $this->lookAhead = null;

    if ($c === null) {
      if ($this->inputIndex < $this->inputLength) {
        $c = $this->input[$this->inputIndex];
        $this->inputIndex += 1;
      }
      else {
        $c = null;
      }
    }

    if ($c === "\r") {
      return "\n";
    }

    if ($c === null || $c === "\n" || ord($c) >= self::ORD_SPACE) {
      return $c;
    }

    return ' ';
  }

  protected function isAlphaNum($c) {
    return ord($c) > 126 || $c === '\\' || preg_match('/^[\w\$]$/', $c) === 1;
  }

  protected function min() {
    $this->a = "\n";
    $this->action(3);

    while ($this->a !== null) {
      switch ($this->a) {
        case ' ':
          if ($this->isAlphaNum($this->b)) {
            $this->action(1);
          }
          else {
            $this->action(2);
          }
          break;

        case "\n":
          switch ($this->b) {
            case '{':
            case '[':
            case '(':
            case '+':
            case '-':
              $this->action(1);
              break;

            case ' ':
              $this->action(3);
              break;

            default:
              if ($this->isAlphaNum($this->b)) {
                $this->action(1);
              }
              else {
                $this->action(2);
              }
          }
          break;

        default:
          switch ($this->b) {
            case ' ':
              if ($this->isAlphaNum($this->a)) {
                $this->action(1);
                break;
              }

              $this->action(3);
              break;

            case "\n":
              switch ($this->a) {
                case '}':
                case ']':
                case ')':
                case '+':
                case '-':
                case '"':
                case "'":
                  $this->action(1);
                  break;

                default:
                  if ($this->isAlphaNum($this->a)) {
                    $this->action(1);
                  }
                  else {
                    $this->action(3);
                  }
              }
              break;

            default:
              $this->action(1);
              break;
          }
      }
    }

    return implode('', $this->output);
  }

  protected function next() {
    $c = $this->get();

    if ($c === '/') {
      switch($this->peek()) {
        case '/':
          for (;;) {
            $c = $this->get();

            if (ord($c) <= self::ORD_LF) {
              return $c;
            }
          }

        case '*':
          $this->get();

          for (;;) {
            switch($this->get()) {
              case '*':
                if ($this->peek() === '/') {
                  $this->get();
                  return ' ';
                }
                break;

              case null:
                throw new JSMinException('Unterminated comment.');
            }
          }

        default:
          return $c;
      }
    }

    return $c;
  }

  protected function peek() {
    $this->lookAhead = $this->get();
    return $this->lookAhead;
  }
}

// -- Exceptions ---------------------------------------------------------------
class JSMinException extends Exception {}
?>