Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * This file is serving optimised JS

 *

 * @package    core_lib

 * @copyright  2010 Petr Skoda (skodak)

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

// disable moodle specific debug messages and any errors in output,

// comment out when debugging or better look into error log!

define('NO_DEBUG_DISPLAY', true);

// we need just the values from config.php and minlib.php

define('ABORT_AFTER_CONFIG', true);

require('../config.php'); // this stops immediately at the beginning of lib/setup.php

require_once("$CFG->dirroot/lib/jslib.php");

if ($slashargument = min_get_slash_argument()) {

    $slashargument = ltrim($slashargument, '/');

    if (substr_count($slashargument, '/') < 1) {

        header('HTTP/1.0 404 not found');

        die('Slash argument must contain both a revision and a file path');

    }

    // image must be last because it may contain "/"

    list($rev, $file) = explode('/', $slashargument, 2);

    $rev  = min_clean_param($rev, 'INT');

    $file = '/'.min_clean_param($file, 'SAFEPATH');

} else {

    $rev  = min_optional_param('rev', -1, 'INT');

    $file = min_optional_param('jsfile', '', 'RAW'); // 'file' would collide with URL rewriting!

}

if (!min_is_revision_valid_and_current($rev)) {

    // If the rev is invalid, normalise it to -1 to disable all caching.

    $rev = -1;

}

// some security first - pick only files with .js extension in dirroot

$jsfiles = array();

$files = explode(',', $file);

foreach ($files as $fsfile) {

    $jsfile = realpath($CFG->dirroot.$fsfile);

    if ($jsfile === false) {

        // does not exist

        continue;

    }

    if ($CFG->dirroot === '/') {

        // Some shared hosting sites serve files directly from '/',

        // this is NOT supported, but at least allow JS when showing

        // errors and warnings.

    } else if (strpos($jsfile, $CFG->dirroot . DIRECTORY_SEPARATOR) !== 0) {

        // hackers - not in dirroot

        continue;

    }

    if (substr($jsfile, -3) !== '.js') {

        // hackers - not a JS file

        continue;

    }

    $jsfiles[] = $jsfile;

}

if (!$jsfiles) {

    // bad luck - no valid files

    header('HTTP/1.0 404 not found');

    die('No valid javascript files found');

}

$etag = sha1($rev.implode(',', $jsfiles));

if ($rev > 0) {

    $candidate = $CFG->localcachedir.'/js/'.$etag;

    if (file_exists($candidate)) {

        if (!empty($_SERVER['HTTP_IF_NONE_MATCH']) || !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {

            // we do not actually need to verify the etag value because our files

            // never change in cache because we increment the rev parameter

            js_send_unmodified(filemtime($candidate), $etag);

        }

        js_send_cached($candidate, $etag);

    } else {

        // The JS needs minfifying, so we're gonna have to load our full Moodle

        // environment to process it..

        define('ABORT_AFTER_CONFIG_CANCEL', true);

        define('NO_MOODLE_COOKIES', true); // Session not used here.

        define('NO_UPGRADE_CHECK', true);  // Ignore upgrade check.

        require("$CFG->dirroot/lib/setup.php");

        js_write_cache_file_content($candidate, core_minify::js_files($jsfiles));

        // verify nothing failed in cache file creation

        clearstatcache();

        if (file_exists($candidate)) {

            js_send_cached($candidate, $etag);

        }

    }

}

$content = '';

foreach ($jsfiles as $jsfile) {

    $content .= file_get_contents($jsfile)."\n";

}

js_send_uncached($content);