max_header_size = 1024 * 4; $this->header_size_accumulator = 0; $this->serverpush_scan_action = 'awpp_scan_htaccess_push'; $this->serverpush_files_option = 'awpp_serverpush_files'; $this->serverpush_possfiles_option = 'awpp_serverpush_possible_files'; $this->htaccess = new \nicomartin\Htaccess( 'Serverpush' ); } public function run() { add_action( 'awpp_settings', [ $this, 'register_settings' ] ); add_filter( 'script_loader_tag', [ $this, 'add_push_id_to_assets' ], 10, 2 ); add_filter( 'style_loader_tag', [ $this, 'add_push_id_to_assets' ], 10, 2 ); add_action( 'wp_ajax_' . $this->serverpush_scan_action, [ $this, 'ajax_get_frontpage_files' ] ); add_action( 'awpp_on_sanitize', [ $this, 'save_serverpush_files' ] ); add_action( 'awpp_on_sanitize', [ $this, 'maybe_do_serverpush_cron' ] ); add_action( 'awpp_renew_htaccess_cron', [ $this, 'add_serverpush_htaccess' ] ); register_uninstall_hook( awpp_get_instance()->file, [ 'clean_up' ] ); if ( ! is_admin() ) { add_action( 'init', [ $this, 'ob_start' ] ); add_filter( 'script_loader_src', [ $this, 'link_preload_header' ], 99, 1 ); add_filter( 'style_loader_src', [ $this, 'link_preload_header' ], 99, 1 ); if ( $this->should_render_prefetch_headers() ) { add_action( 'wp_head', [ $this, 'resource_hints' ], 99, 1 ); } } } public function register_settings() { $section = awpp_settings()->add_section( awpp_settings_page_server(), 'serverpush', __( 'HTTP/2 Server Push', 'awpp' ) ); $choices = [ 'disabled' => __( 'Disabled', 'awpp' ), 'php' => __( 'PHP', 'awpp' ), 'htaccess' => __( '.htaccess', 'awpp' ), ]; $after = ''; $after .= ''; $args = [ 'after_field' => $after, ]; awpp_settings()->add_select( $section, 'serverpush', __( 'Enable HTTP/2 Server Push', 'awpp' ), $choices, '', $args ); } public function add_push_id_to_assets( $html, $id ) { if ( current_filter() == 'script_loader_tag' ) { return str_replace( ' src', ' data-push-id="' . $id . '" src', $html ); } return str_replace( ' href', ' data-push-id="' . $id . '" href', $html ); } public function ajax_get_frontpage_files() { $add = $this->scan_frontpage_files(); if ( 'success' != $add['status'] ) { awpp_exit_ajax( $add['status'], $add['msg'], $add ); } awpp_exit_ajax( 'success', '', $add ); } public function save_serverpush_files( $data ) { if ( isset( $data['serverpush'] ) ) { if ( ! isset( $data['serverpush_files'] ) || 'htaccess' != $data['serverpush'] ) { $data['serverpush_files'] = []; } update_option( $this->serverpush_files_option, $data['serverpush_files'] ); $this->add_serverpush_htaccess( $data['serverpush_files'] ); unset( $data['serverpush_files'] ); } return $data; } public function maybe_do_serverpush_cron( $data ) { if ( isset( $data['serverpush'] ) ) { if ( 'htaccess' != $data['serverpush'] ) { wp_clear_scheduled_hook( 'awpp_renew_htaccess_cron' ); $this->htaccess->delete(); } elseif ( ! wp_next_scheduled( 'awpp_renew_htaccess_cron' ) ) { wp_schedule_event( time(), 'twicedaily', 'awpp_renew_htaccess_cron' ); } } } public function ob_start() { if ( 'php' == awpp_get_setting( 'serverpush' ) ) { ob_start(); } } public function link_preload_header( $src ) { if ( 'php' != awpp_get_setting( 'serverpush' ) ) { return $src; } if ( strpos( $src, home_url() ) !== false ) { $preload_src = apply_filters( 'awpp_link_preload_src', $src ); if ( ! empty( $preload_src ) ) { $header = sprintf( 'Link: <%s>; rel=preload; as=%s', esc_url( $this->link_url_to_relative_path( $preload_src ) ), sanitize_html_class( $this->link_resource_hint_as( current_filter() ) ) ); if ( ( $this->header_size_accumulator + strlen( $header ) ) < $this->max_header_size ) { $this->header_size_accumulator += strlen( $header ); header( $header, false ); } $GLOBALS[ 'awpp_' . $this->link_resource_hint_as( current_filter() ) . '_srcs' ][] = $this->link_url_to_relative_path( $preload_src ); } } return $src; } public function resource_hints() { if ( 'php' != awpp_get_setting( 'serverpush' ) ) { return; } $resource_types = array( 'script', 'style' ); array_walk( $resource_types, function ( $resource_type ) { $resources = $this->get_resources( $GLOBALS, $resource_type ); array_walk( $resources, function ( $src ) use ( $resource_type ) { printf( '', esc_url( $src ), esc_html( $resource_type ) ); } ); } ); } /** * PHP Helpers */ public function get_resources( $globals = null, $resource_type ) { $globals = ( null === $globals ) ? $GLOBALS : $globals; $resource_type_key = "awpp_{$resource_type}_srcs"; if ( ! ( is_array( $globals ) && isset( $globals[ $resource_type_key ] ) ) ) { return array(); } elseif ( ! is_array( $globals[ $resource_type_key ] ) ) { return array( $globals[ $resource_type_key ] ); } else { return $globals[ $resource_type_key ]; } } public function link_url_to_relative_path( $src ) { return '//' === substr( $src, 0, 2 ) ? preg_replace( '/^\/\/([^\/]*)\//', '/', $src ) : preg_replace( '/^http(s)?:\/\/[^\/]*/', '', $src ); } public function should_render_prefetch_headers() { return apply_filters( 'awpp_render_resource_hints', ! function_exists( 'wp_resource_hints' ) ); } public function link_resource_hint_as( $current_hook ) { return 'style_loader_src' === $current_hook ? 'style' : 'script'; } /** * Server Push Helpers */ public function scan_frontpage_files() { if ( has_action( 'cachify_flush_cache' ) ) { do_action( 'cachify_flush_cache' ); } elseif ( function_exists( 'w3tc_pgcache_flush' ) ) { w3tc_pgcache_flush(); } elseif ( function_exists( 'wp_cache_clear_cache' ) ) { wp_cache_clear_cache(); } elseif ( function_exists( 'rocket_clean_domain' ) ) { rocket_clean_domain(); } $return = []; $agent = awpp_get_instance()->name . ' User Agent'; $ch = curl_init( get_home_url() ); curl_setopt( $ch, CURLOPT_URL, get_home_url() ); curl_setopt( $ch, CURLOPT_USERAGENT, $agent ); curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true ); $file = curl_exec( $ch ); $http_code = curl_getinfo( $ch, CURLINFO_HTTP_CODE ); curl_close( $ch ); if ( $http_code >= 300 ) { return [ 'status' => 'error', 'msg' => 'invalid HTTP Code: ' . $http_code, 'body' => $file, ]; } else { $return['status'] = 'success'; } $attr_regex = '/([a-zA-Z0-9-]+)="([^"]+)"/'; $styles_regex = '//'; $scripts_regex = '/