282 lines
10 KiB
PHP
282 lines
10 KiB
PHP
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<?php
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/**
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* Class WP_Optimize_Gzip_Compression
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*/
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class WP_Optimize_Gzip_Compression {
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/**
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* WP_Optimize_Htaccess instance.
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*
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* @var WP_Optimize_Htaccess
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*/
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private $_htaccess = null;
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/**
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* WP_Optimize instance.
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*
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* @var WP_Optimize
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*/
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private $_wp_optimize = null;
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/**
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* Gzip section in htaccess will wrapped with this comment
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*
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* @var string
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*/
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private $_htaccess_section_comment = 'WP-Optimize Gzip compression';
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/**
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* WP_Optimize_Gzip_Compression constructor.
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*/
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public function __construct() {
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$this->_wp_optimize = WP_Optimize();
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$this->_htaccess = $this->_wp_optimize->get_htaccess();
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}
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/**
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* Make http request to theme style.css, get 'server' line and check headers for gzip/brotli encoding option.
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*
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* @return array|WP_Error
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*/
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public function get_headers_information() {
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static $headers_information;
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if (isset($headers_information)) return $headers_information;
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$headers = WP_Optimize()->get_stylesheet_headers();
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if (is_wp_error($headers)) return $headers;
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$headers_information = array(
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'server' => array_key_exists('server', $headers) ? $headers['server'] : '',
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);
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if (array_key_exists('content-encoding', $headers) && preg_match('/^(.*\W|)br(\W.*|)$/i', $headers['content-encoding'])) {
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// check if there exists Content-encoding header with br(Brotli) value.
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$headers_information['compression'] = 'brotli';
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} elseif (array_key_exists('content-encoding', $headers) && preg_match('/gzip/i', $headers['content-encoding'])) {
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// check if there exists Content-encoding header with gzip value.
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$headers_information['compression'] = 'gzip';
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} else {
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$headers_information['compression'] = false;
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}
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return $headers_information;
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}
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/**
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* Make request to checkgzipcompression.com api and check if gzip option enabled.
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*
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* @return bool|WP_Error
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*/
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public function check_api_for_gzip() {
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$url = get_template_directory_uri() . '/style.css';
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$api_url = 'https://checkgzipcompression.com/js/checkgzip.json?url=' . urlencode($url);
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$result = wp_remote_get($api_url, array('timeout' => 10));
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if (is_wp_error($result)) return $result;
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if (!isset($result['body'])) return new WP_Error('Gzip', __("We can't definitely determine Gzip status as API doesn't return correct answer.", 'wp-optimize'));
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$body = json_decode($result['body']);
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if (isset($body->error) && $body->error) return new WP_Error('Gzip', __("We can't definitely determine Gzip status as API doesn't return correct answer.", 'wp-optimize'));
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if ($body->result->gzipenabled && !$body->error) {
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return true;
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}
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return false;
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}
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/**
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* Check if Gzip compression is enabled.
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*
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* @param boolean $force_check - force the check
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* @return bool|WP_Error
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*/
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public function is_gzip_compression_enabled($force_check = false) {
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if (!$force_check) return WP_Optimize()->get_options()->get_option('is_gzip_compression_enabled');
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// trying to get info about gzip in headers.
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$headers_info = $this->get_headers_information();
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// we can't determine then return WP_Error.
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if (is_wp_error($headers_info)) return $headers_info;
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$is_gzip_compression_enabled = $headers_info['compression'];
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// if we got error then trying to get info from api otherwise get result from check_headers_for_gzip().
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// $is_gzip_compression_enabled = is_wp_error($is_gzip_compression_enabled) ? $this->check_api_for_gzip() : $is_gzip_compression_enabled;
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// if Gzip is not enabled but we have added settings and Apache modules nt loaded then return error.
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if (false == $is_gzip_compression_enabled && $this->is_gzip_compression_section_exists()) {
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if (false === $this->_wp_optimize->is_apache_module_loaded(array('mod_filter', 'mod_deflate'))) {
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return new WP_Error('gzip_missing_module', __('We successfully added Gzip compression settings into .htaccess file.', 'wp-optimize').' '.__('However, the test file we fetched was not Gzip-compressed.', 'wp-optimize').' '.__('It seems one of Apache modules - mod_filter or mod_deflate - is not active.', 'wp-optimize'));
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} elseif (WP_Optimize()->is_apache_server()) {
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return new WP_Error('gzip_missing_module', __('We successfully added Gzip compression settings into .htaccess file.', 'wp-optimize').' '.__('However, the test file we fetched was not Gzip-compressed.', 'wp-optimize').' '.__('Possible causes include that Apache (your webserver) is not configured to allow .htaccess files to take effect, or one of Apache modules - mod_filter or mod_deflate - is not active, or the webserver is configured to disallow Gzip compression.', 'wp-optimize').' '.__('You should speak to your web hosting support to find how to enable it.', 'wp-optimize'));
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} else {
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return new WP_Error('gzip_unsuccessful', __('We successfully added Gzip compression settings into .htaccess file.', 'wp-optimize').' '.__('However, the test file we fetched was not Gzip-compressed.', 'wp-optimize').' '.__('You should speak to your web hosting support to find how to enable it.', 'wp-optimize'));
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}
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}
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WP_Optimize()->get_options()->update_option('is_gzip_compression_enabled', $is_gzip_compression_enabled);
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return $is_gzip_compression_enabled;
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}
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/**
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* Check if section with Gzip options already exists in htaccess file.
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*
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* @return bool
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*/
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public function is_gzip_compression_section_exists() {
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return $this->_htaccess->is_commented_section_exists($this->_htaccess_section_comment);
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}
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/**
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* Enable Gzip compression - add settings into .htaccess.
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*/
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public function enable() {
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$this->_htaccess->update_commented_section($this->prepare_gzip_section(), $this->_htaccess_section_comment);
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$this->_htaccess->write_file();
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}
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/**
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* Disable Gzip compression - remove settings from .htaccess.
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*/
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public function disable() {
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$this->_htaccess->remove_commented_section($this->_htaccess_section_comment);
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$this->_htaccess->write_file();
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}
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/**
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* Check if gzip compression option is set to true then add section with gzip settings into .htaccess (used when plugin being activated).
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*/
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public function restore() {
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$enabled = WP_Optimize()->get_options()->get_option('is_gzip_compression_enabled');
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if ($enabled && $this->_htaccess->is_writable()) $this->enable();
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}
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/**
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* Handler for Gzip compression enable command, called from WP_Optimize_Commands.
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*
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* @param array $params - ['enable' => true|false]
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* @return array
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*/
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public function enable_gzip_command_handler($params) {
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$section_updated = false;
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$enable = (isset($params['enable']) && $params['enable']) ? true : false;
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if ($this->_htaccess->is_writable()) {
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// update commented section
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if ($enable) {
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$this->enable();
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} else {
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$this->disable();
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}
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// read updated file.
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$this->_htaccess->read_file();
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// check if section added or removed successfully.
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$section_exists = $this->_htaccess->is_commented_section_exists($this->_htaccess_section_comment);
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// set correct $section-updated flag.
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$section_updated = $enable === $section_exists;
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}
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$is_gzip_compression_enabled = $this->is_gzip_compression_enabled(true);
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if ($section_updated) {
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return array(
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'success' => true,
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'enabled' => is_wp_error($is_gzip_compression_enabled) ? false : $is_gzip_compression_enabled,
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// if we can't determine gzip status then return error message.
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'message' => is_wp_error($is_gzip_compression_enabled) ? $is_gzip_compression_enabled->get_error_message() : '',
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);
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} else {
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$gzip_section = $this->prepare_gzip_section();
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if ($is_gzip_compression_enabled) {
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$message = sprintf(__('We can\'t update your %s file. Please try to remove following lines manually:', 'wp-optimize'), $this->_htaccess->get_filename());
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} else {
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$message = sprintf(__('We can\'t update your %s file. Please try to add following lines manually:', 'wp-optimize'), $this->_htaccess->get_filename());
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}
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return array(
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'success' => false,
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'enabled' => is_wp_error($is_gzip_compression_enabled) ? false : $is_gzip_compression_enabled,
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'message' => $message,
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'output' =>
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htmlentities($this->_htaccess->get_section_begin_comment($this->_htaccess_section_comment).PHP_EOL.
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join(PHP_EOL, $this->_htaccess->get_flat_array($gzip_section)).
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PHP_EOL.$this->_htaccess->get_section_end_comment($this->_htaccess_section_comment)),
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);
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}
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}
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/**
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* Prepare array with options to switch on gzip in htaccess.
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*
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* @return array
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*/
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private function prepare_gzip_section() {
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return array(
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array(
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'<IfModule mod_filter.c>',
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array(
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'<IfModule mod_deflate.c>',
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'# Compress HTML, CSS, JavaScript, Text, XML and fonts',
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'AddType application/vnd.ms-fontobject .eot',
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'AddType font/ttf .ttf',
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'AddType font/otf .otf',
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'AddType font/x-woff .woff',
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'AddType image/svg+xml .svg',
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'',
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'AddOutputFilterByType DEFLATE application/javascript',
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'AddOutputFilterByType DEFLATE application/rss+xml',
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'AddOutputFilterByType DEFLATE application/vnd.ms-fontobject',
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'AddOutputFilterByType DEFLATE application/x-font',
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'AddOutputFilterByType DEFLATE application/x-font-opentype',
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'AddOutputFilterByType DEFLATE application/x-font-otf',
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'AddOutputFilterByType DEFLATE application/x-font-truetype',
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'AddOutputFilterByType DEFLATE application/x-font-ttf',
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'AddOutputFilterByType DEFLATE application/x-font-woff',
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'AddOutputFilterByType DEFLATE application/x-javascript',
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'AddOutputFilterByType DEFLATE application/xhtml+xml',
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'AddOutputFilterByType DEFLATE application/xml',
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'AddOutputFilterByType DEFLATE font/opentype',
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'AddOutputFilterByType DEFLATE font/otf',
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'AddOutputFilterByType DEFLATE font/ttf',
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'AddOutputFilterByType DEFLATE font/woff',
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'AddOutputFilterByType DEFLATE image/svg+xml',
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'AddOutputFilterByType DEFLATE image/x-icon',
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'AddOutputFilterByType DEFLATE text/css',
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'AddOutputFilterByType DEFLATE text/html',
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'AddOutputFilterByType DEFLATE text/javascript',
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'AddOutputFilterByType DEFLATE text/plain',
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'AddOutputFilterByType DEFLATE text/xml',
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'',
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'# Remove browser bugs (only needed for really old browsers)',
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'BrowserMatch ^Mozilla/4 gzip-only-text/html',
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'BrowserMatch ^Mozilla/4\.0[678] no-gzip',
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'BrowserMatch \bMSIE !no-gzip !gzip-only-text/html',
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array(
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'<IfModule mod_headers.c>',
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'Header append Vary User-Agent',
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'</IfModule>',
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),
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'</IfModule>',
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),
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'</IfModule>',
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),
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);
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}
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}
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