theme/javascript.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * This file is responsible for serving the one huge CSS of each theme.
  20  *
  21  * @package   moodlecore
  22  * @copyright 2009 Petr Skoda (skodak)  {@link http://skodak.org}
  23  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26
  27 // we need just the values from config.php and minlib.php
  28 define('ABORT_AFTER_CONFIG', true);
  29 require('../config.php'); // this stops immediately at the beginning of lib/setup.php
  30
  31 $themename = min_optional_param('theme', 'standard', 'SAFEDIR');
  32 $rev       = min_optional_param('rev', 0, 'INT');
  33 $type      = min_optional_param('type', 'head', 'RAW');
  34
  35 if ($type !== 'head' and $type !== 'footer') {
  36     header('HTTP/1.0 404 not found');
  37     die('Theme was not found, sorry.');
  38 }
  39
  40 if (file_exists("$CFG->dirroot/theme/$themename/config.php")) {
  41     // exists
  42 } else if (!empty($CFG->themedir) and file_exists("$CFG->themedir/$themename/config.php")) {
  43     // exists
  44 } else {
  45     header('HTTP/1.0 404 not found');
  46     die('Theme was not found, sorry.');
  47 }
  48
  49 $candidate = "$CFG->dataroot/cache/theme/$themename/javascript_$type.js";
  50
  51 if ($rev > -1 and file_exists($candidate)) {
  52     if (!empty($_SERVER['HTTP_IF_NONE_MATCH']) || !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
  53         // we do not actually need to verify the etag value because our files
  54         // never change in cache because we increment the rev parameter
  55         $lifetime = 60*60*24*30; // 30 days
  56         header('HTTP/1.1 304 Not Modified');
  57         header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
  58         header('Cache-Control: max-age='.$lifetime);
  59         header('Content-Type: application/javascript; charset=utf-8');
  60         die;
  61     }
  62     send_cached_js($candidate, $rev);
  63 }
  64
  65 //=================================================================================
  66 // ok, now we need to start normal moodle script, we need to load all libs and $DB
  67 define('ABORT_AFTER_CONFIG_CANCEL', true);
  68
  69 define('NO_MOODLE_COOKIES', true); // Session not used here
  70 define('NO_UPGRADE_CHECK', true);  // Ignore upgrade check
  71
  72 require("$CFG->dirroot/lib/setup.php");
  73 // setup include path
  74 set_include_path($CFG->libdir . '/minify/lib' . PATH_SEPARATOR . get_include_path());
  75 require_once('Minify.php');
  76
  77 $theme = theme_config::load($themename);
  78
  79 if ($rev > -1) {
  80     check_dir_exists(dirname($candidate));
  81     $fp = fopen($candidate, 'w');
  82     fwrite($fp, minify($theme->javascript_files($type)));
  83     fclose($fp);
  84     send_cached_js($candidate);
  85 } else {
  86     send_uncached_js($theme->javascript_content($type));
  87 }
  88
  89 //=================================================================================
  90 //=== utility functions ==
  91 // we are not using filelib because we need to fine tune all header
  92 // parameters to get the best performance.
  93
  94 function send_cached_js($jspath) {
  95     $lifetime = 60*60*24*30; // 30 days
  96
  97     header('Content-Disposition: inline; filename="javascript.php"');
  98     header('Last-Modified: '. gmdate('D, d M Y H:i:s', filemtime($jspath)) .' GMT');
  99     header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
 100     header('Pragma: ');
 101     header('Cache-Control: max-age='.$lifetime);
 102     header('Accept-Ranges: none');
 103     header('Content-Type: application/javascript; charset=utf-8');
 104     if (!min_enable_zlib_compression()) {
 105         header('Content-Length: '.filesize($jspath));
 106     }
 107
 108     readfile($jspath);
 109     die;
 110 }
 111
 112 function send_uncached_js($js) {
 113     header('Content-Disposition: inline; filename="javascript.php"');
 114     header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
 115     header('Expires: '. gmdate('D, d M Y H:i:s', time() + 2) .' GMT');
 116     header('Pragma: ');
 117     header('Accept-Ranges: none');
 118     header('Content-Type: application/javascript; charset=utf-8');
 119     header('Content-Length: '.strlen($js));
 120
 121     echo $js;
 122     die;
 123 }
 124
 125 function minify($files) {
 126     if (0 === stripos(PHP_OS, 'win')) {
 127         Minify::setDocRoot(); // IIS may need help
 128     }
 129     // disable all caching, we do it in moodle
 130     Minify::setCache(null, false);
 131
 132     $options = array(
 133         'bubbleCssImports' => false,
 134         // Don't gzip content we just want text for storage
 135         'encodeOutput' => false,
 136         // Maximum age to cache, not used but required
 137         'maxAge' => 1800,
 138         // The files to minify
 139         'files' => $files,
 140         // Turn orr URI rewriting
 141         'rewriteCssUris' => false,
 142         // This returns the CSS rather than echoing it for display
 143         'quiet' => true
 144     );
 145
 146     $result = Minify::serve('Files', $options);
 147     return $result['content'];
 148 }