Media Combiner

gistfile1.txt

The combiner takes a comma-separated list of files:

eg: /jsc/reset.css,main.css 

To use it, add this to your Apache Config:

RewriteRule ^/jsc/(.*\.js) /path/to/combine-gzip.inc.php?type=javascript&encoding=none&files=$1
RewriteRule ^/cssc/(.*\.css) /path/to/combine-gzip.inc.php?type=css&encoding=none&files=$1

And save the  included php file to a suitable location. Your cache directory will need to be writable by the web server.

gistfile2.php

<?php
  /************************************************************************
   * CSS and Javascript Combinator 0.7
   */
  $cache    = true;
  $cachedir = $_SERVER['DOCUMENT_ROOT'] . '/media/cache';
  $cssdir   = $_SERVER['DOCUMENT_ROOT'] . '/media/css';
  $jsdir    = $_SERVER['DOCUMENT_ROOT'] . '/media/js';

  $force    = false;
 
  if( strstr($_SERVER['REQUEST_URI'], "force=true") ):
    $force = true;
  endif;

  // Determine the directory and type we should use
  switch ($_GET['type']) {
    case 'css':
      $base = realpath($cssdir);
      break;
    case 'javascript':
      $base = realpath($jsdir);
      break;
    default:
      header ("HTTP/1.0 503 Not Implemented");
      exit;
  };
  $type = $_GET['type'];
  $elements = explode(',', $_GET['files']);

  // Determine last modification date of the files
  $lastmodified = 0;
  foreach($elements as $key => $element) {
    $element = $base . '/' . $element;

    $path = realpath($element);
    if($path == ""):
      unset($elements[$key]);
      continue;
    endif;

    if (($type == 'javascript' && substr($path, -3) != '.js') || 
      ($type == 'css' && substr($path, -4) != '.css' &&
      (substr($path, 0, strlen($base)) != $base)
      )) {
      header ("HTTP/1.0 403 Forbidden");
      exit; 
    }
    if (!file_exists($path)) {
	  // header ("HTTP/1.0 404 Not Found");
      //exit;
    }
    
    $lastmodified = max($lastmodified, filemtime($path));
  }

  // If not files matched, send 404
  if (empty($elements)):
    header ("HTTP/1.0 404 Not Found");
    exit;
  endif;

  // Send Etag hash
  $mhash = md5($_GET['files']);
  $hash = $lastmodified . '-' . $mhash;
  header ("Etag: \"" . $hash . "\"");
  if (isset($_SERVER['HTTP_IF_NONE_MATCH']) &&
    $force == true &&
    stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) == '"' . $hash . '"') 
  {
    // Return visit and no modifications, so do not send anything
    header ("HTTP/1.0 304 Not Modified");
    header ('Content-Length: 0');
  } 
  else 
  {
    // last modified is the max mtime for loaded files
    header('Cache-Control: must-revalidate');
    header('Last-modified: ' . gmdate('r', $lastmodified));

    // Set expiry
    if (!(isset($_GET['e']) && $_GET['e']==='no')) {
      $time = time()+(isset($_GET['e']) ? $_GET['e'] : 365)*86400;
      header('Expires: '.gmdate('r', $time));
    }

    // Send Content-Type
    header("Content-Type: text/" . $type);  	
  	
    // First time visit or files were modified
    if ($cache) 
    {
    		      
      // Try the cache first to see if the combined files were already generated
      $cachefile = 'cache-' . $hash . '.' . $type . '.combine-cache';
      
      if (file_exists($cachedir . '/' . $cachefile) && $force == false) {
        echo file_get_contents("$cachedir/$cachefile");
        exit;
      } else {
        # Make the cache directory if it doesnt exist
        if (!file_exists($cachedir)) {
          if (@mkdir($cachedir)) {
            @chmod($cachedir, 0775);
          }
      }

    }
 
    // Get contents of the files
    $contents = '/* combined '.date("c").' */';
    reset($elements);
    foreach ($elements as $element) { 
        $element = $base . '/' . $element;
      
      $path = realpath($element);
      $contents .= "\n\n" . file_get_contents($path);
    }
  
    // Store cache
    
    if ($cache) {
      if ($fp = @fopen($cachedir . '/' . $cachefile, 'wb')) {
        fwrite($fp, $contents);
        fclose($fp);
      }
    
      foreach (glob($cachedir . "/" . "*" . $type .".combine-cache*") as $filename) {
        if (strpos($filename,$mhash) !== false && strpos($filename,$cachefile) === false && strpos($filename,$cachefile) === false)
          @unlink($filename);
        }
      }

      echo $contents;
      exit;
    }
  } 
  
?>