CoralCDN - a free P2P Content Delivery Network - instead of your own server, thus saves lots of bandwidth and improves availability. REQUIRES PHP >= 5 Version: 1.1.2 Author: Phoenixheart Author URI: http://www.phoenixheart.net */ if (!class_exists('FCDN')) { class FCDN { var $name = 'free-cdn'; var $version = '1.0.2'; var $default_options = array( 'version' => '1.0.2', 'apply' => array( 'css' => true, 'js' => true, 'img' => true, 'bgr' => true, 'embed' => true, ), 'excluded' => array(), 'included' => array(), 'powered' => true, 'debug' => false, ); var $options; var $plugin_url = 'http://www.phoenixheart.net/wp-plugins/free-cdn'; var $document; var $debug_result = array(); function __construct() { $this->options = get_option($this->name); if (!$this->options) { $this->options = $this->default_options; $this->reset_options(); } } /** * @desc */ function pre_content() { ob_start(); } /** * @desc */ function post_content() { $content = ob_get_contents(); ob_end_clean(); $this->parse($content); } /** * @desc */ function register_menu() { add_options_page( __('Free CDN', $this->name), __('Free CDN', $this->name), 8, basename(__FILE__), array($this, 'build_options_form') ); } /** * @desc */ function build_options_form() { printf('

Free CDN Options

Using CDN on these contents

Include, exclude, and debug

Support this plugin (Thanks!)

Free CDN is totally free, but if you think it worths some love, please consider a donation.

', $this->options['apply']['css'] ? 'checked="checked"' : '', $this->options['apply']['js'] ? 'checked="checked"' : '', $this->options['apply']['img'] ? 'checked="checked"' : '', $this->options['apply']['bgr'] ? 'checked="checked"' : '', $this->options['apply']['embed'] ? 'checked="checked"' : '', implode(PHP_EOL, $this->options['included']), implode(PHP_EOL, $this->options['excluded']), $this->options['debug'] ? 'checked="checked"' : '', $this->options['powered'] ? 'checked="checked"' : '', $this->powered_message(), wp_create_nonce($this->name) ); } function powered_message() { return sprintf('Powered by Free CDN WordPress plugin', $this->plugin_url); } /** * @desc */ function parse($html) { require_once(dirname(__FILE__) . '/simple_html_dom.php'); $this->document = str_get_html($html); // external stylesheets if ($this->options['apply']['css']) { $tags = $this->document->find("link[rel='stylesheet']"); foreach ($tags as $css) { $css->href = $this->rewrite_url($css->href); // we don't need to parse CSS // because most images in css are relative // so if the css file in on nyud.net then // the images are on nyud.net too } } // external javascripts if ($this->options['apply']['js']) { $tags = $this->document->find('script[src]'); foreach ($tags as $js) { $js->src = $this->rewrite_url($js->src); } } // images if ($this->options['apply']['img']) { $tags = $this->document->find('img'); foreach ($tags as $img) { $img->src = $this->rewrite_url($img->src); } } // embeded if ($this->options['apply']['embed']) { // 1. tag $tags = $this->document->find("param[name='filename']"); foreach ($tags as $param) { $param->value = $this->rewrite_url($param->value); } // 2. embed tag $tags = $this->document->find('embed[src]'); foreach ($tags as $embed) { $embed->src = $this->rewrite_url($embed->src); } } // background images $regex = '/style\s*=\s*(?:".*?\s*\(\s*\'(.*?)\'\s*\).*?")/si'; $html = $this->document->save(); preg_match_all($regex, $html, $matches); foreach ($matches[1] as $url) { $html = str_replace($matches[1], $this->rewrite_url($matches[1]), $html); } echo $html; if ($this->debug_result) { echo PHP_EOL . '' . PHP_EOL; } } /** * @desc */ function rewrite_url($original_url) { if (is_array($original_url)) { // some recursions $ret = array(); foreach ($original_url as $single_url) { $ret[] = $this->rewrite_url($single_url); } return $ret; } $rewritten_url = $this->rel_to_abs($original_url); if (($this->is_internal($rewritten_url) || $this->is_included($rewritten_url)) && !$this->is_excluded($rewritten_url)) { // a candidate to rewrite $parts = parse_url($rewritten_url); if (isset($parts['port'])) { $parts['host'] .= ".$parts[port].nyud.net"; unset($parts['port']); } else { $parts['host'] .= '.nyud.net'; } $rewritten_url = $this->glue_url($parts); if ($this->options['debug']) { // if we are in debug mode, just show the changes, just collect $this->debug_result[$original_url] = $rewritten_url; // don't apply it return $original_url; } return $rewritten_url; // we're not in debug mode } return $original_url; // the url is not a candidate } /** * @desc */ function rel_to_abs($relative) { $p = parse_url($relative); if($p['scheme'])return $relative; extract(parse_url($this->get_current_url())); $path = dirname($path); if($relative{0} == '/') { $cparts = array_filter(explode('/', $relative)); } else { $aparts = array_filter(explode('/', $path)); $rparts = array_filter(explode('/', $relative)); $cparts = array_merge($aparts, $rparts); foreach($cparts as $i => $part) { if($part == '.') { $cparts[$i] = null; } if($part == '..') { $cparts[$i - 1] = null; $cparts[$i] = null; } } $cparts = array_filter($cparts); } $path = implode('/', $cparts); $url = ''; if($scheme) { $url = "$scheme://"; } if($user) { $url .= "$user"; if($pass) { $url .= ":$pass"; } $url .= '@'; } if($host) { $url .= "$host/"; } $url .= $path; return $url; } /** * @author ilja at radusch dot com * @param mixed $parsed */ function glue_url($parsed) { if (!is_array($parsed)) { return false; } $uri = isset($parsed['scheme']) ? $parsed['scheme'].':'.((strtolower($parsed['scheme']) == 'mailto') ? '' : '//') : ''; $uri .= isset($parsed['user']) ? $parsed['user'].(isset($parsed['pass']) ? ':'.$parsed['pass'] : '').'@' : ''; $uri .= isset($parsed['host']) ? $parsed['host'] : ''; $uri .= isset($parsed['port']) ? ':'.$parsed['port'] : ''; if (isset($parsed['path'])) { $uri .= (substr($parsed['path'], 0, 1) == '/') ? $parsed['path'] : ((!empty($uri) ? '/' : '' ) . $parsed['path']); } $uri .= isset($parsed['query']) ? '?'.$parsed['query'] : ''; $uri .= isset($parsed['fragment']) ? '#'.$parsed['fragment'] : ''; return $uri; } /** * @desc Determines if an (absolute) url is internal */ function is_internal($abs_url) { if (strpos($abs_url, $this->get_current_host()) === 0) return true; // subdomains? leave them to "included" options } function is_excluded($abs_url) { foreach ($this->options['excluded'] as $base) { if (trim($base) == '') continue; if (strpos($abs_url, $base) === 0) return true; } return false; } function is_included($abs_url) { foreach ($this->options['included'] as $base) { if (strpos($abs_url, $base) === 0) return true; } return false; } function get_current_url() { static $current_url; if (isset($current_url)) return $current_url; $current_url = $this->get_current_host(); if ($_SERVER['SERVER_PORT'] != 80) { $current_url .= $_SERVER['SERVER_PORT']; } $current_url .= $_SERVER['REQUEST_URI']; return $current_url; } function get_current_host() { static $current_host; if (isset($current_host)) return $current_host; $current_host = (empty($_SERVER['HTTPS']) && $_SERVER['SERVER_PORT'] != 443) ? 'http://' : 'https://'; $current_host .= $_SERVER['SERVER_NAME']; return $current_host; } function activate() { if (!$current_options = get_option($this->name)) { $this->reset_options(); return; } $current_options['version'] = $this->version; foreach ($this->default_options as $key => $value) { if (!isset($current_options[$key])) $current_options[$key] = $value; } update_option($this->name, $current_options); } function deactivate() { } function reset_options() { delete_option($this->name); add_option($this->name, $this->default_options); } function show_powered() { if ($this->options['powered']) { echo '

' . $this->powered_message() . '

'; } } function wp_init() { if (is_admin()) { wp_enqueue_script('fcdn_admin_onload', '/' . PLUGINDIR . '/free-cdn/admin.js', array('jquery'), $this->version); } if (!isset($_POST['fcdn_action'])) return false; if (!wp_verify_nonce($_POST['_nonce'], $this->name)) { die('Security check failed. Please try refreshing.'); } switch ($_POST['fcdn_action']) { case 'save_options': default: $this->save_options(); break; } exit(); } function save_options() { $new_options = array( 'apply' => array( 'css' => $_POST['apply']['css'] == 'on', 'js' => $_POST['apply']['js'] == 'on', 'img' => $_POST['apply']['img'] == 'on', 'bgr' => $_POST['apply']['bgr'] == 'on', 'embed' => $_POST['apply']['embed'] == 'on', ), 'powered' => $_POST['powered'] == 'on', 'debug' => $_POST['debug'] == 'on', ); $excluded = explode(PHP_EOL, $_POST['excluded']); foreach ($excluded as $key=>$value) { if (!trim($excluded[$key])) unset($excluded[$key]); } $included = explode(PHP_EOL, $_POST['included']); foreach ($included as $key=>$value) { if (!trim($included[$key])) unset($included[$key]); } $new_options['excluded'] = $excluded; $new_options['included'] = $included; foreach ($new_options as $key => $value) { $this->options[$key] = $value; } update_option($this->name, $this->options); echo '

Options saved.

'; } } } $fcdn = new FCDN(); if (!is_admin()) { add_action('get_header', array($fcdn, 'pre_content'), PHP_INT_MAX); add_action('wp_footer', array($fcdn, 'show_powered')); add_action('wp_footer', array($fcdn, 'post_content'), PHP_INT_MAX); } add_action('admin_menu', array($fcdn, 'register_menu')); add_action('init', array($fcdn, 'wp_init')); register_activation_hook(__FILE__, array($fcdn, 'activate')); register_deactivation_hook(__FILE__, array($fcdn, 'deactivate'));