theme/javascript.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * This file is responsible for serving the one huge CSS of each theme.
  19  *
  20  * @package   core
  21  * @copyright 2009 Petr Skoda (skodak)  {@link http://skodak.org}
  22  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  */
  24
  25
  26 // disable moodle specific debug messages and any errors in output,
  27 // comment out when debugging or better look into error log!
  28 define('NO_DEBUG_DISPLAY', true);
  29
  30 // we need just the values from config.php and minlib.php
  31 define('ABORT_AFTER_CONFIG', true);
  32 require('../config.php'); // this stops immediately at the beginning of lib/setup.php
  33 require_once("$CFG->dirroot/lib/jslib.php");
  34
  35 if ($slashargument = min_get_slash_argument()) {
  36     $slashargument = ltrim($slashargument, '/');
  37     if (substr_count($slashargument, '/') < 2) {
  38         header('HTTP/1.0 404 not found');
  39         die('Slash argument must contain both a revision and a file path');
  40     }
  41     // image must be last because it may contain "/"
  42     list($themename, $rev, $type) = explode('/', $slashargument, 3);
  43     $themename = min_clean_param($themename, 'SAFEDIR');
  44     $rev       = min_clean_param($rev, 'INT');
  45     $type      = min_clean_param($type, 'SAFEDIR');
  46
  47 } else {
  48     $themename = min_optional_param('theme', 'standard', 'SAFEDIR');
  49     $rev       = min_optional_param('rev', -1, 'INT');
  50     $type      = min_optional_param('type', 'head', 'RAW');
  51 }
  52
  53 if (!min_is_revision_valid_and_current($rev)) {
  54     // If the rev is invalid, normalise it to -1 to disable all caching.
  55     $rev = -1;
  56 }
  57
  58 if ($type !== 'head' and $type !== 'footer') {
  59     header('HTTP/1.0 404 not found');
  60     die('Theme was not found, sorry.');
  61 }
  62
  63 if (file_exists("$CFG->dirroot/theme/$themename/config.php")) {
  64     // exists
  65 } else if (!empty($CFG->themedir) and file_exists("$CFG->themedir/$themename/config.php")) {
  66     // exists
  67 } else {
  68     header('HTTP/1.0 404 not found');
  69     die('Theme was not found, sorry.');
  70 }
  71
  72 $candidate = "$CFG->localcachedir/theme/$rev/$themename/javascript_$type.js";
  73 $etag = sha1("$rev/$themename/$type");
  74
  75 if ($rev > 0 and file_exists($candidate)) {
  76     if (!empty($_SERVER['HTTP_IF_NONE_MATCH']) || !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
  77         // we do not actually need to verify the etag value because our files
  78         // never change in cache because we increment the rev parameter
  79         js_send_unmodified(filemtime($candidate), $etag);
  80     }
  81     js_send_cached($candidate, $etag);
  82 }
  83
  84 //=================================================================================
  85 // ok, now we need to start normal moodle script, we need to load all libs and $DB
  86 define('ABORT_AFTER_CONFIG_CANCEL', true);
  87
  88 define('NO_MOODLE_COOKIES', true); // Session not used here
  89 define('NO_UPGRADE_CHECK', true);  // Ignore upgrade check
  90
  91 require("$CFG->dirroot/lib/setup.php");
  92
  93 $theme = theme_config::load($themename);
  94 $themerev = theme_get_revision();
  95
  96 if ($themerev <= 0 or $rev != $themerev) {
  97     // Do not send caching headers if they do not request current revision,
  98     // we do not want to pollute browser caches with outdated JS.
  99     js_send_uncached($theme->javascript_content($type));
 100 }
 101
 102 make_localcache_directory('theme', false);
 103
 104 js_write_cache_file_content($candidate, core_minify::js_files($theme->javascript_files($type)));
 105 // Verify nothing failed in cache file creation.
 106 clearstatcache();
 107 if (file_exists($candidate)) {
 108     js_send_cached($candidate, $etag);
 109 }
 110
 111 js_send_uncached($theme->javascript_content($type));