| Current File : /home/escuelai/public_html/wp-content/plugins/w3-total-cache/BrowserCache_Plugin.php |
<?php
/**
* File: BrowserCache_Plugin.php
*
* @package W3TC
*/
namespace W3TC;
/**
* Class BrowserCache_Plugin
*
* W3 ObjectCache plugin
*
* phpcs:disable PSR2.Classes.PropertyDeclaration.Underscore
* phpcs:disable PSR2.Methods.MethodDeclaration.Underscore
* phpcs:disable WordPress.PHP.IniSet.Risky
* phpcs:disable WordPress.PHP.NoSilencedErrors.Discouraged
*/
class BrowserCache_Plugin {
/**
* Config
*
* @var Config
*/
private $_config = null;
/**
* Browsercache rewrite
*
* @var bool
*/
private $browsercache_rewrite;
/**
* Constructor
*
* @return void
*/
public function __construct() {
$this->_config = Dispatcher::config();
}
/**
* Runs plugin
*
* @return void
*/
public function run() {
add_filter( 'w3tc_admin_bar_menu', array( $this, 'w3tc_admin_bar_menu' ) );
if ( $this->_config->get_boolean( 'browsercache.html.w3tc' ) ) {
add_action( 'send_headers', array( $this, 'send_headers' ) );
}
if ( ! $this->_config->get_boolean( 'browsercache.html.etag' ) ) {
add_filter( 'wp_headers', array( $this, 'filter_wp_headers' ), 0, 2 );
}
$url_uniqualize_enabled = $this->url_uniqualize_enabled();
if ( $this->url_clean_enabled() || $url_uniqualize_enabled ) {
$this->browsercache_rewrite = $this->_config->get_boolean( 'browsercache.rewrite' );
// modify CDN urls.
add_filter( 'w3tc_cdn_url', array( $this, 'w3tc_cdn_url' ), 0, 3 );
if ( $url_uniqualize_enabled ) {
add_action( 'w3tc_flush_all', array( $this, 'w3tc_flush_all' ), 1050, 1 );
}
if ( $this->can_ob() ) {
Util_Bus::add_ob_callback( 'browsercache', array( $this, 'ob_callback' ) );
}
}
$v = $this->_config->get_string( 'browsercache.security.session.cookie_httponly' );
if ( ! empty( $v ) ) {
@ini_set( 'session.cookie_httponly', 'on' === $v ? '1' : '0' );
}
$v = $this->_config->get_string( 'browsercache.security.session.cookie_secure' );
if ( ! empty( $v ) ) {
@ini_set( 'session.cookie_secure', 'on' === $v ? '1' : '0' );
}
$v = $this->_config->get_string( 'browsercache.security.session.use_only_cookies' );
if ( ! empty( $v ) ) {
@ini_set( 'session.use_only_cookies', 'on' === $v ? '1' : '0' );
}
add_filter( 'w3tc_minify_http2_preload_url', array( $this, 'w3tc_minify_http2_preload_url' ), 4000 );
add_filter( 'w3tc_cdn_config_headers', array( $this, 'w3tc_cdn_config_headers' ) );
if ( Util_Admin::is_w3tc_admin_page() ) {
add_action( 'admin_notices', array( $this, 'admin_notices' ) );
}
}
/**
* Check if URL clean is enabled
*
* @return bool
*/
private function url_clean_enabled() {
return $this->_config->get_boolean( 'browsercache.cssjs.querystring' ) ||
$this->_config->get_boolean( 'browsercache.html.querystring' ) ||
$this->_config->get_boolean( 'browsercache.other.querystring' );
}
/**
* Check if URL uniqualize is enabled
*
* @return bool
*/
private function url_uniqualize_enabled() {
return $this->_config->get_boolean( 'browsercache.cssjs.replace' ) ||
$this->_config->get_boolean( 'browsercache.html.replace' ) ||
$this->_config->get_boolean( 'browsercache.other.replace' );
}
/**
* Flush all
*
* @param array $extras Extras.
*
* @return void
*/
public function w3tc_flush_all( $extras = array() ) {
if ( isset( $extras['only'] ) && 'browsercache' !== $extras['only'] ) {
return;
}
update_option( 'w3tc_browsercache_flush_timestamp', wp_rand( 10000, 99999 ) . '' );
}
/**
* Check if we can start OB
*
* @return boolean
*/
public function can_ob() {
/**
* Skip if admin
*/
if ( defined( 'WP_ADMIN' ) ) {
return false;
}
/**
* Skip if doing AJAX
*/
if ( defined( 'DOING_AJAX' ) ) {
return false;
}
/**
* Skip if doing cron
*/
if ( defined( 'DOING_CRON' ) ) {
return false;
}
/**
* Skip if APP request
*/
if ( defined( 'APP_REQUEST' ) ) {
return false;
}
/**
* Skip if XMLRPC request
*/
if ( defined( 'XMLRPC_REQUEST' ) ) {
return false;
}
/**
* Check for WPMU's and WP's 3.0 short init
*/
if ( defined( 'SHORTINIT' ) && SHORTINIT ) {
return false;
}
/**
* Check User Agent
*/
$http_user_agent = isset( $_SERVER['HTTP_USER_AGENT'] ) ? sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) : '';
if ( stristr( $http_user_agent, W3TC_POWERED_BY ) !== false ) {
return false;
}
return true;
}
/**
* Output buffer callback
*
* @param string $buffer Buffer.
*
* @return mixed
*/
public function ob_callback( $buffer ) {
if ( '' !== $buffer && Util_Content::is_html_xml( $buffer ) ) {
$domain_url_regexp = Util_Environment::home_domain_root_url_regexp();
$buffer = preg_replace_callback(
'~(href|src|action|extsrc|asyncsrc|w3tc_load_js\()=?([\'"])((' . $domain_url_regexp . ')?(/[^\'"/][^\'"]*\.([a-z-_]+)([\?#][^\'"]*)?))[\'"]~Ui',
array( $this, 'link_replace_callback' ),
$buffer
);
// without quotes.
$buffer = preg_replace_callback(
'~(href|src|action|extsrc|asyncsrc)=((' . $domain_url_regexp . ')?(/[^\\s>][^\\s>]*\.([a-z-_]+)([\?#][^\\s>]*)?))([\\s>])~Ui',
array( $this, 'link_replace_callback_noquote' ),
$buffer
);
}
return $buffer;
}
/**
* Link replace callback
*
* @param string $matches Matches.
*
* @return string
*/
public function link_replace_callback( $matches ) {
list ( $match, $attr, $quote, $url, , , , , $extension ) = $matches;
$ops = $this->_get_url_mutation_operations( $url, $extension );
if ( is_null( $ops ) ) {
return $match;
}
$url = $this->mutate_url( $url, $ops, ! $this->browsercache_rewrite );
if ( 'w3tc_load_js(' !== $attr ) {
return $attr . '=' . $quote . $url . $quote;
}
return sprintf( '%s\'%s\'', $attr, $url );
}
/**
* Link replace callback when no quote arount attribute value
*
* @param string $matches Matches.
*
* @return string
*/
public function link_replace_callback_noquote( $matches ) {
list ( $match, $attr, $url, , , , , $extension, , $delimiter ) = $matches;
$ops = $this->_get_url_mutation_operations( $url, $extension );
if ( is_null( $ops ) ) {
return $match;
}
$url = $this->mutate_url( $url, $ops, ! $this->browsercache_rewrite );
return $attr . '=' . $url . $delimiter;
}
/**
* Mutate http/2 header links
*
* @param array $data Data.
*
* @return array
*/
public function w3tc_minify_http2_preload_url( $data ) {
if ( isset( $data['browsercache_processed'] ) ) {
return $data;
}
$data['browsercache_processed'] = '*';
$url = $data['result_link'];
// decouple extension.
$matches = array();
if ( ! preg_match( '/\.([a-zA-Z0-9]+)($|[\?])/', $url, $matches ) ) {
return $data;
}
$extension = $matches[1];
$ops = $this->_get_url_mutation_operations( $url, $extension );
if ( is_null( $ops ) ) {
return $data;
}
$mutate_by_querystring = ! $this->browsercache_rewrite;
$url = $this->mutate_url( $url, $ops, $mutate_by_querystring );
$data['result_link'] = $url;
return $data;
}
/**
* Link replace for CDN url
*
* @param string $url URL.
* @param string $original_url Original URL.
* @param bool $is_cdn_mirror Is CDN mirror.
*
* @return string
*/
public function w3tc_cdn_url( $url, $original_url, $is_cdn_mirror ) {
// decouple extension.
$matches = array();
if ( ! preg_match( '/\.([a-zA-Z0-9]+)($|[\?])/', $original_url, $matches ) ) {
return $url;
}
$extension = $matches[1];
$ops = $this->_get_url_mutation_operations( $original_url, $extension );
if ( is_null( $ops ) ) {
return $url;
}
// for push cdns each flush would require manual reupload of files.
$mutate_by_querystring = ! $this->browsercache_rewrite || ! $is_cdn_mirror;
$url = $this->mutate_url( $url, $ops, $mutate_by_querystring );
return $url;
}
/**
* Mutate url
*
* @param string $url URL.
* @param array $ops Operations data.
* @param bool $mutate_by_querystring Mutate by querystring flag.
*
* @return string
*/
private function mutate_url( $url, $ops, $mutate_by_querystring ) {
$query_pos = strpos( $url, '?' );
if ( isset( $ops['querystring'] ) && false !== $query_pos ) {
$url = substr( $url, 0, $query_pos );
$query_pos = false;
}
if ( isset( $ops['replace'] ) ) {
$id = $this->get_filename_uniqualizator();
if ( $mutate_by_querystring ) {
if ( false !== $query_pos ) {
$url = substr( $url, 0, $query_pos + 1 ) . $id . '&' . substr( $url, $query_pos + 1 );
} else {
$tag_pos = strpos( $url, '#' );
if ( false === $tag_pos ) {
$url .= '?' . $id;
} else {
$url = substr( $url, 0, $tag_pos ) . '?' . $id . substr( $url, $tag_pos );
}
}
} else {
// add $id to url before extension.
$url_query = '';
if ( false !== $query_pos ) {
$url_query = substr( $url, $query_pos );
$url = substr( $url, 0, $query_pos );
}
$ext_pos = strrpos( $url, '.' );
$extension = substr( $url, $ext_pos );
$url = substr( $url, 0, strlen( $url ) - strlen( $extension ) ) .
'.' . $id . $extension . $url_query;
}
}
return $url;
}
/**
* Get mutatation url operations
*
* @param string $url URL.
* @param string $extension Operations data.
*
* @return string
*/
public function _get_url_mutation_operations( $url, $extension ) {
static $extensions = null;
if ( null === $extensions ) {
$core = Dispatcher::component( 'BrowserCache_Core' );
$extensions = $core->get_replace_querystring_extensions( $this->_config );
}
static $exceptions = null;
if ( null === $exceptions ) {
$exceptions = $this->_config->get_array( 'browsercache.replace.exceptions' );
}
if ( ! isset( $extensions[ $extension ] ) ) {
return null;
}
$test_url = Util_Environment::remove_query( $url );
foreach ( $exceptions as $exception ) {
$escaped = str_replace( '~', '\~', $exception );
if ( trim( $exception ) && preg_match( '~' . $escaped . '~', $test_url ) ) {
return null;
}
}
return $extensions[ $extension ];
}
/**
* Returns replace ID
*
* @return string
*/
public function get_filename_uniqualizator() {
static $cache_id = null;
if ( null === $cache_id ) {
$value = get_option( 'w3tc_browsercache_flush_timestamp' );
if ( empty( $value ) ) {
$value = wp_rand( 10000, 99999 ) . '';
update_option( 'w3tc_browsercache_flush_timestamp', $value );
}
$cache_id = substr( $value, 0, 5 );
}
return 'x' . $cache_id;
}
/**
* Admin bar menu
*
* @param array $menu_items Menu items.
*
* @return array
*/
public function w3tc_admin_bar_menu( $menu_items ) {
$browsercache_update_media_qs = (
$this->_config->get_boolean( 'browsercache.cssjs.replace' ) ||
$this->_config->get_boolean( 'browsercache.other.replace' )
);
if ( $browsercache_update_media_qs ) {
$menu_items['20190.browsercache'] = array(
'id' => 'w3tc_flush_browsercache',
'parent' => 'w3tc_flush',
'title' => __( 'Browser Cache', 'w3-total-cache' ),
'href' => wp_nonce_url( admin_url( 'admin.php?page=w3tc_dashboard&w3tc_flush_browser_cache' ), 'w3tc' ),
);
}
return $menu_items;
}
/**
* Send headers
*
* @return void
*/
public function send_headers() {
@header( 'X-Powered-By: ' . Util_Environment::w3tc_header() );
}
/**
* Returns headers config for CDN
*
* @param Config $config Config.
*
* @return Config
*/
public function w3tc_cdn_config_headers( $config ) {
$sections = Util_Mime::sections_to_mime_types_map();
foreach ( $sections as $section => $v ) {
$config[ $section ] = $this->w3tc_cdn_config_headers_section( $section );
}
return $config;
}
/**
* Gets CDN config headers section
*
* @param string $section Section.
*
* @return Config
*/
private function w3tc_cdn_config_headers_section( $section ) {
$c = $this->_config;
$prefix = 'browsercache.' . $section;
$lifetime = $c->get_integer( $prefix . '.lifetime' );
$headers = array();
if ( $c->get_boolean( $prefix . '.w3tc' ) ) {
$headers['X-Powered-By'] = Util_Environment::w3tc_header();
}
if ( $c->get_boolean( $prefix . '.cache.control' ) ) {
switch ( $c->get_string( $prefix . '.cache.policy' ) ) {
case 'cache':
$headers['Pragma'] = 'public';
$headers['Cache-Control'] = 'public';
break;
case 'cache_public_maxage':
$headers['Pragma'] = 'public';
$headers['Cache-Control'] = "max-age=$lifetime, public";
break;
case 'cache_validation':
$headers['Pragma'] = 'public';
$headers['Cache-Control'] = 'public, must-revalidate, proxy-revalidate';
break;
case 'cache_noproxy':
$headers['Pragma'] = 'public';
$headers['Cache-Control'] = 'private, must-revalidate';
break;
case 'cache_maxage':
$headers['Pragma'] = 'public';
$headers['Cache-Control'] = "max-age=$lifetime, public, must-revalidate, proxy-revalidate";
break;
case 'no_cache':
$headers['Pragma'] = 'no-cache';
$headers['Cache-Control'] = 'private, no-cache';
break;
case 'no_store':
$headers['Pragma'] = 'no-store';
$headers['Cache-Control'] = 'no-store';
break;
case 'cache_immutable':
$headers['Pragma'] = 'public';
$headers['Cache-Control'] = "max-age=$lifetime, public, immutable";
break;
case 'cache_immutable_nomaxage':
$headers['Pragma'] = 'public';
$headers['Cache-Control'] = 'public, immutable';
break;
}
}
return array(
'etag' => $c->get_boolean( $prefix . 'etag' ),
'expires' => $c->get_boolean( $prefix . '.expires' ),
'lifetime' => $lifetime,
'static' => $headers,
);
}
/**
* Filters headers set by WordPress
*
* @param array $headers Headers.
* @param object $wp WP object.
*
* @return array
*/
public function filter_wp_headers( $headers, $wp ) {
if ( ! empty( $wp->query_vars['feed'] ) ) {
unset( $headers['ETag'] );
}
return $headers;
}
/**
* Admin notice for Content-Security-Policy-Report-Only that displays if the feature is enabled and the report-uri/to isn't defined.
*
* @since 2.2.13
*/
public function admin_notices() {
// Check if the current user is a contributor or higher.
if (
\user_can( \get_current_user_id(), 'manage_options' ) &&
$this->_config->get_boolean( 'browsercache.security.cspro' ) &&
empty( $this->_config->get_string( 'browsercache.security.cspro.reporturi' ) ) &&
empty( $this->_config->get_string( 'browsercache.security.cspro.reportto' ) )
) {
$message = '<p>' . sprintf(
// translators: 1 opening HTML a tag to Browser Cache CSP-Report-Only settings, 2 closing HTML a tag.
esc_html__(
'The Content Security Policy - Report Only requires the "report-uri" and/or "report-to" directives. Please define one or both of these directives %1$shere%2$s.',
'w3-total-cache'
),
'<a href="' . Util_Ui::admin_url( 'admin.php?page=w3tc_browsercache#browsercache__security__cspro' ) . '" target="_blank" alt="' . esc_attr__( 'Browser Cache Content-Security-Policy-Report-Only Settings', 'w3-total-cache' ) . '">',
'</a>'
);
Util_Ui::error_box( $message );
}
}
}