CDN を前面に置いた時に WordPress ダッシュボードで表示される URL に投稿の更新日付を含ませて、強制的に no cache の状態で表示させるための fix
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| <?php | |
| /* | |
| Plugin Name: CloudFront Preview Fix | |
| Plugin URI: | |
| Description: WPログイン時にパーマリンクに記事変更日付を含み、プレビューが最新になるようにする | |
| Version: 0.5 | |
| Author: | |
| Author URI: | |
| */ | |
| add_action( 'init', function(){ | |
| $cf_fix = cloudfront_preview_fix::get_instance(); | |
| $cf_fix->add_hook(); | |
| }); | |
| class cloudfront_preview_fix{ | |
| private static $instance; | |
| private function __construct() {} | |
| public static function get_instance() { | |
| if ( ! isset( self::$instance ) ) { | |
| $c = __CLASS__; | |
| self::$instance = new $c(); | |
| } | |
| return self::$instance; | |
| } | |
| public function add_hook() { | |
| add_action( 'template_redirect', array($this, 'template_redirect') ); | |
| add_filter( 'post_link', array($this, 'post_link_fix'), 10, 3 ); | |
| add_filter( 'preview_post_link', array($this, 'preview_post_link_fix'), 10, 2 ); | |
| add_filter( 'the_guid', array($this,'the_guid') ); | |
| add_filter( 'sanitize_file_name', array($this,'sanitizeFileName') ); | |
| } | |
| public function template_redirect() { | |
| if ( is_user_logged_in() ) { | |
| nocache_headers(); | |
| } | |
| } | |
| public function post_link_fix( $permalink, $post, $leavename ){ | |
| if ( !is_user_logged_in() || !is_admin() || is_feed() ) { | |
| return $permalink; | |
| } | |
| $post = get_post( $post ); | |
| $post_time = | |
| isset($post->post_modified) | |
| ? date('YmdHis', strtotime($post->post_modified)) | |
| : current_time('YmdHis'); | |
| $permalink = add_query_arg( 'post_date', $post_time, $permalink ); | |
| return $permalink; | |
| } | |
| public function preview_post_link_fix( $permalink, $post ){ | |
| if ( is_feed() ) { | |
| return $permalink; | |
| } | |
| $post = get_post( $post ); | |
| $preview_time = current_time('YmdHis'); | |
| $permalink = add_query_arg( 'preview_time', $preview_time, $permalink ); | |
| return $permalink; | |
| } | |
| public function the_guid($guid) { | |
| $guid = preg_replace( '#\?post_date=[\d]+#', '', $guid ); | |
| return $guid; | |
| } | |
| public function sanitizeFileName( $filename ){ | |
| $info = pathinfo($filename); | |
| $ext = empty($info['extension']) ? '' : '.' . $info['extension']; | |
| $name = basename($filename, $ext); | |
| $finalFileName = $name.'-'.current_time('YmdHis'); | |
| return $finalFileName.$ext; | |
| } | |
| } |
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