get_boolean( 'minify.enabled' );
$engine = $config->get_string( 'minify.engine' );
$rewrite = $config->get_boolean( 'minify.rewrite' );
$this->fix_folders( $config, $exs );
if ( $config->get_boolean( 'config.check' ) || $force_all_checks ) {
if ( $minify_enabled && Util_Rule::can_check_rules() && $rewrite ) {
$this->rules_core_add( $config, $exs );
} else {
$this->rules_core_remove( $exs );
}
if ( $minify_enabled && 'file' === $engine ) {
$this->rules_cache_add( $config, $exs );
} else {
$this->rules_cache_remove( $exs );
}
}
// if no errors so far - check if rewrite actually works.
if ( count( $exs->exceptions() ) <= 0 ) {
try {
if ( $minify_enabled && $rewrite && $config->get_boolean( 'minify.debug' ) ) {
$this->verify_rewrite_working();
}
} catch ( \Exception $ex ) {
$exs->push( $ex );
}
if ( $minify_enabled ) {
$this->verify_engine_working( $config, $exs );
}
}
if ( count( $exs->exceptions() ) > 0 ) {
throw $exs;
}
}
/**
* Handles configuration adjustments triggered by events.
*
* @param Config $config W3TC Config containing Minify settings.
* @param string $event The event that triggered this function.
* @param Config $old_config Optional previous W3TC Config for comparison.
*
* @return void
*/
public function fix_on_event( $config, $event, $old_config = null ) {
$minify_enabled = $config->get_boolean( 'minify.enabled' );
$engine = $config->get_string( 'minify.engine' );
// Schedules events.
if ( $minify_enabled && ( 'file' === $engine || 'file_generic' === $engine ) ) {
$new_interval = $config->get_integer( 'minify.file.gc' );
$old_interval = $old_config ? $old_config->get_integer( 'minify.file.gc' ) : -1;
if ( null !== $old_config && $new_interval !== $old_interval ) {
$this->unschedule_gc();
}
if ( ! wp_next_scheduled( 'w3_minify_cleanup' ) ) {
wp_schedule_event( time(), 'w3_minify_cleanup', 'w3_minify_cleanup' );
}
} else {
$this->unschedule_gc();
}
}
/**
* Executes necessary clean-up actions after the plugin is deactivated.
*
* @return void
*
* @throws \Util_Environment_Exceptions If removal of rules or unscheduling fails.
*/
public function fix_after_deactivation() {
$exs = new Util_Environment_Exceptions();
$this->rules_core_remove( $exs );
$this->rules_cache_remove( $exs );
$this->unschedule_gc();
$this->unschedule_purge_wpcron();
if ( count( $exs->exceptions() ) > 0 ) {
throw $exs;
}
}
/**
* Retrieves the required rewrite rules based on the current configuration.
*
* @param Config $config W3TC Config containing Minify settings.
*
* @return array|null Array of rewrite rules or null if Minify is disabled.
*/
public function get_required_rules( $config ) {
if ( ! $config->get_boolean( 'minify.enabled' ) ) {
return null;
}
$rewrite_rules = array();
if ( 'file' === $config->get_string( 'minify.engine' ) ) {
$minify_rules_cache_path = Util_Rule::get_minify_rules_cache_path();
$rewrite_rules[] = array(
'filename' => $minify_rules_cache_path,
'content' => $this->rules_cache_generate( $config ),
);
}
$minify_rules_core_path = Util_Rule::get_minify_rules_core_path();
$rewrite_rules[] = array(
'filename' => $minify_rules_core_path,
'content' => $this->rules_core_generate( $config ),
'priority' => 1000,
);
return $rewrite_rules;
}
/**
* Fixes folder-related issues for the Minify engine.
*
* @param Config $config W3TC Config containing Minify settings.
* @param object $exs Collection of exceptions encountered during the process.
*
* @return void
*/
private function fix_folders( $config, $exs ) {
// folder that we delete if exists and not writeable.
if ( $config->get_boolean( 'minify.enabled' ) && 'file' === $config->get_string( 'minify.engine' ) ) {
$dir = W3TC_CACHE_MINIFY_DIR;
try {
if ( file_exists( $dir ) && ! is_writeable( $dir ) ) {
Util_WpFile::delete_folder(
$dir,
'',
isset( $_SERVER['REQUEST_URI'] ) ? esc_url_raw( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : ''
);
}
} catch ( Util_WpFile_FilesystemRmdirException $ex ) {
$exs->push( $ex );
}
}
}
/**
* Verifies that the Minify engine is working correctly.
*
* @param Config $config W3TC Config containing Minify settings.
* @param object $exs Collection of exceptions encountered during the process.
*
* @return void
*/
private function verify_engine_working( $config, $exs ) {
$minifiers_errors = array();
if ( 'yuijs' === $config->get_string( 'minify.js.engine' ) ) {
$path_java = $config->get_string( 'minify.yuijs.path.java' );
$path_jar = $config->get_string( 'minify.yuijs.path.jar' );
if ( ! file_exists( $path_java ) ) {
$minifiers_errors[] = sprintf( 'YUI Compressor (JS): JAVA executable path was not found. The default minifier JSMin will be used instead.' );
} elseif ( ! file_exists( $path_jar ) ) {
$minifiers_errors[] = sprintf( 'YUI Compressor (JS): JAR file path was not found. The default minifier JSMin will be used instead.' );
}
}
if ( 'yuicss' === $config->get_string( 'minify.css.engine' ) ) {
$path_java = $config->get_string( 'minify.yuicss.path.java' );
$path_jar = $config->get_string( 'minify.yuicss.path.jar' );
if ( ! file_exists( $path_java ) ) {
$minifiers_errors[] = sprintf( 'YUI Compressor (CSS): JAVA executable path was not found. The default CSS minifier will be used instead.' );
} elseif ( ! file_exists( $path_jar ) ) {
$minifiers_errors[] = sprintf( 'YUI Compressor (CSS): JAR file path was not found. The default CSS minifier will be used instead.' );
}
}
if ( 'ccjs' === $config->get_string( 'minify.js.engine' ) ) {
$path_java = $config->get_string( 'minify.ccjs.path.java' );
$path_jar = $config->get_string( 'minify.ccjs.path.jar' );
if ( ! file_exists( $path_java ) ) {
$minifiers_errors[] = sprintf( 'Closure Compiler: JAVA executable path was not found. The default minifier JSMin will be used instead.' );
} elseif ( ! file_exists( $path_jar ) ) {
$minifiers_errors[] = sprintf( 'Closure Compiler: JAR file path was not found. The default minifier JSMin will be used instead.' );
}
}
if ( count( $minifiers_errors ) ) {
$minify_error = 'The following minifiers cannot be found or are no longer working:';
foreach ( $minifiers_errors as $minifiers_error ) {
$minify_error .= '- ' . $minifiers_error . '
';
}
$minify_error .= '
This message will automatically disappear once the issue is resolved.';
$exs->push( new Util_Environment_Exception( $minify_error ) );
}
}
/**
* Verifies that URL rewriting functionality for Minify is working.
*
* @return void
*
* @throws \Util_Environment_Exception If URL rewriting fails.
*/
private function verify_rewrite_working() {
$url = Minify_Core::minified_url( wp_rand() . 'w3tc_rewrite_test.css' );
$result = $this->test_rewrite( $url );
if ( 'ok' !== $result ) {
$home_url = get_home_url();
$tech_message =
( Util_Environment::is_nginx() ? 'nginx configuration file' : '.htaccess file' ) .
' contains rules to rewrite url ' . $url . '. If handled by plugin, it returns "Minify OK"' .
' message.
The plugin made a request to ' . $url . ' but received:
' . $result .
'
instead of "Minify OK" response.
';
$error = 'W3 Total Cache error:It appears Minify ' .
'URL rewriting is not working. ';
if ( Util_Environment::is_nginx() ) {
$error .= 'Please verify that all configuration files are included in the configuration file ' .
'(and that you have reloaded / restarted nginx).';
} else {
$error .= 'Please verify that the server configuration allows .htaccess';
}
$error .= '
Unfortunately minification will not function without custom rewrite rules. ' .
'Please ask your server administrator for assistance. Also refer to the install page for the rules for your server.';
throw new Util_Environment_Exception(
esc_html( $error ),
esc_html( $tech_message )
);
}
}
/**
* Tests the rewrite rules by sending a request to a test Minify URL.
*
* @param string $url The URL to test for rewriting functionality.
*
* @return string 'ok' if successful, or an error message otherwise.
*/
private function test_rewrite( $url ) {
$key = sprintf( 'w3tc_rewrite_test_%s', substr( md5( $url ), 0, 16 ) );
$result = get_site_transient( $key );
if ( 'ok' !== $result ) {
$response = Util_Http::get( $url );
$is_ok = (
! is_wp_error( $response ) &&
200 === $response['response']['code'] &&
'Minify OK' === trim( $response['body'] )
);
if ( $is_ok ) {
$result = 'ok';
} elseif ( is_wp_error( $response ) ) {
$result = $response->get_error_message();
} else {
$result = '
' . print_r( $response['response'], true ) . '
'; // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_print_r
}
set_site_transient( $key, $result, 30 );
}
return $result;
}
/**
* Unschedules the garbage collection event for Minify files.
*
* @return void
*/
private function unschedule_gc() {
if ( wp_next_scheduled( 'w3_minify_cleanup' ) ) {
wp_clear_scheduled_hook( 'w3_minify_cleanup' );
}
}
/**
* Unschedules the WordPress cron event for purging Minify cache.
*
* @since 2.8.0
*
* @return void
*/
private function unschedule_purge_wpcron() {
if ( wp_next_scheduled( 'w3tc_minifycache_purge_wpcron' ) ) {
wp_clear_scheduled_hook( 'w3tc_minifycache_purge_wpcron' );
}
}
/**
* Adds core rewrite rules for Minify.
*
* @param Config $config W3TC Config containing Minify settings.
* @param object $exs Collection of exceptions encountered during the process.
*
* @return void
*/
private function rules_core_add( $config, $exs ) {
Util_Rule::add_rules(
$exs,
Util_Rule::get_minify_rules_core_path(),
$this->rules_core_generate( $config ),
W3TC_MARKER_BEGIN_MINIFY_CORE,
W3TC_MARKER_END_MINIFY_CORE,
array(
W3TC_MARKER_BEGIN_PGCACHE_CORE => 0,
W3TC_MARKER_BEGIN_WORDPRESS => 0,
W3TC_MARKER_END_BROWSERCACHE_CACHE => strlen( W3TC_MARKER_END_BROWSERCACHE_CACHE ) + 1,
W3TC_MARKER_END_PGCACHE_CACHE => strlen( W3TC_MARKER_END_PGCACHE_CACHE ) + 1,
W3TC_MARKER_END_MINIFY_CACHE => strlen( W3TC_MARKER_END_MINIFY_CACHE ) + 1,
)
);
}
/**
* Removes core rewrite rules for Minify.
*
* @param object $exs Collection of exceptions encountered during the process.
*
* @return void
*/
private function rules_core_remove( $exs ) {
// no need to remove rules for apache - its in cache .htaccess file.
if ( ! Util_Environment::is_nginx() ) {
return;
}
Util_Rule::remove_rules(
$exs,
Util_Rule::get_minify_rules_core_path(),
W3TC_MARKER_BEGIN_MINIFY_CORE,
W3TC_MARKER_END_MINIFY_CORE
);
}
/**
* Generates the core rewrite rules for Minify based on the server environment.
*
* @param Config $config W3TC Config containing Minify settings.
*
* @return string The generated rules.
*/
public function rules_core_generate( $config ) {
switch ( true ) {
case Util_Environment::is_apache():
case Util_Environment::is_litespeed():
return $this->rules_core_generate_apache( $config );
case Util_Environment::is_nginx():
return $this->rules_core_generate_nginx( $config );
}
return '';
}
/**
* Retrieves the site URI for the current WordPress installation.
*
* @return string The relative site URI.
*/
private function site_uri() {
$site_uri = rtrim( network_site_url( '', 'relative' ), '/' ) . '/';
// There is a bug in WP where network_home_url can return a non-relative URI even though scheme is set to relative.
if ( Util_Environment::is_url( $site_uri ) ) {
$site_uri = wp_parse_url( $site_uri, PHP_URL_PATH );
}
return $site_uri;
}
/**
* Generates Apache rewrite rules for core minification functionality.
*
* @param Config $config W3TC Config containing relevant settings.
*
* @return string Generated Apache rewrite rules.
*/
public function rules_core_generate_apache( $config ) {
$cache_uri = Util_Environment::url_to_uri( Util_Environment::filename_to_url( W3TC_CACHE_MINIFY_DIR ) ) . '/';
$site_uri = $this->site_uri();
// There is a bug in WP where network_home_url can return a non-relative URI even though scheme is set to relative.
if ( Util_Environment::is_url( $site_uri ) ) {
$site_uri = wp_parse_url( $site_uri, PHP_URL_PATH );
}
$engine = $config->get_string( 'minify.engine' );
$browsercache = $config->get_boolean( 'browsercache.enabled' );
$brotli = (
$browsercache &&
$config->get_boolean( 'browsercache.cssjs.brotli' ) &&
! defined( 'W3TC_PAGECACHE_OUTPUT_COMPRESSION_OFF' )
);
$compression = (
$browsercache &&
$config->get_boolean( 'browsercache.cssjs.compression' ) &&
! defined( 'W3TC_PAGECACHE_OUTPUT_COMPRESSION_OFF' )
);
$rules = '';
$rules .= W3TC_MARKER_BEGIN_MINIFY_CORE . "\n";
$rules .= "\n";
$rules .= " RewriteEngine On\n";
$rules .= " RewriteBase " . $cache_uri . "\n";
if ( 'file' === $engine ) {
if ( $brotli ) {
$rules .= " RewriteCond %{HTTP:Accept-Encoding} br\n";
$rules .= " RewriteRule .* - [E=APPEND_EXT:_br]\n";
$rules .= " RewriteCond %{REQUEST_FILENAME}%{ENV:APPEND_EXT} -" . ( $config->get_boolean( 'minify.file.nfs' ) ? 'F' : 'f' ) . "\n";
$rules .= " RewriteRule (.*) $1%{ENV:APPEND_EXT} [L]\n";
}
if ( $compression ) {
$rules .= " RewriteCond %{HTTP:Accept-Encoding} gzip\n";
$rules .= " RewriteRule .* - [E=APPEND_EXT:_gzip]\n";
$rules .= " RewriteCond %{REQUEST_FILENAME}%{ENV:APPEND_EXT} -" . ( $config->get_boolean( 'minify.file.nfs' ) ? 'F' : 'f' ) . "\n";
$rules .= " RewriteRule (.*) $1%{ENV:APPEND_EXT} [L]\n";
}
if ( ! $brotli && ! $compression ) {
$rules .= " RewriteCond %{REQUEST_FILENAME} !-f\n";
}
}
$rules .= " RewriteRule ^(.+\\.(css|js))$ {$site_uri}index.php [L]\n";
$rules .= "\n";
$rules .= W3TC_MARKER_END_MINIFY_CORE . "\n";
return $rules;
}
/**
* Generates NGINX rewrite rules for core minification functionality.
*
* @param Config $config W3TC Config containing relevant settings.
*
* @return string Generated NGINX rewrite rules.
*/
public function rules_core_generate_nginx( $config ) {
$cache_uri = Util_Environment::url_to_uri( Util_Environment::filename_to_url( W3TC_CACHE_MINIFY_DIR ) ) . '/';
$first_regex_var = '$1';
// for subdir - need to count subdir in url.
if ( Util_Environment::is_wpmu() && ! Util_Environment::is_wpmu_subdomain() ) {
// take into accont case when whole subdir wpmu is installed in subdir.
$home_uri = network_home_url( '', 'relative' );
if ( substr( $cache_uri, 0, strlen( $home_uri ) ) === $home_uri ) {
$cache_uri = $home_uri . '([a-z0-9]+/)?' . substr( $cache_uri, strlen( $home_uri ) );
} else {
$cache_uri = '(/[a-z0-9]+)?' . $cache_uri;
}
$first_regex_var = '$2';
}
$minify_uri = $this->site_uri();
$engine = $config->get_string( 'minify.engine' );
$browsercache = $config->get_boolean( 'browsercache.enabled' );
$brotli = (
$browsercache &&
$config->get_boolean( 'browsercache.cssjs.brotli' ) &&
! defined( 'W3TC_PAGECACHE_OUTPUT_COMPRESSION_OFF' )
);
$compression = (
$browsercache &&
$config->get_boolean( 'browsercache.cssjs.compression' ) &&
! defined( 'W3TC_PAGECACHE_OUTPUT_COMPRESSION_OFF' )
);
$rules = '';
$rules .= W3TC_MARKER_BEGIN_MINIFY_CORE . "\n";
if ( 'file' === $engine ) {
$rules .= "set \$w3tc_enc \"\";\n";
if ( $brotli ) {
$rules .= "if (\$http_accept_encoding ~ br) {\n";
$rules .= " set \$w3tc_enc _br;\n";
$rules .= "}\n";
}
if ( $compression ) {
$rules .= "if (\$http_accept_encoding ~ gzip) {\n";
$rules .= " set \$w3tc_enc _gzip;\n";
$rules .= "}\n";
}
$rules .= "if (-f \$request_filename\$w3tc_enc) {\n";
$rules .= " rewrite (.*) $1\$w3tc_enc break;\n";
$rules .= "}\n";
}
$rules .= "rewrite ^$cache_uri {$minify_uri}index.php last;\n";
$rules .= W3TC_MARKER_END_MINIFY_CORE . "\n";
return $rules;
}
/**
* Adds cache rules for minification.
*
* @param Config $config W3TC Config containing relevant settings.
* @param array $exs Array of existing rules to be modified or added to.
*
* @return void
*/
private function rules_cache_add( $config, $exs ) {
Util_Rule::add_rules(
$exs,
Util_Rule::get_minify_rules_cache_path(),
$this->rules_cache_generate( $config ),
W3TC_MARKER_BEGIN_MINIFY_CACHE,
W3TC_MARKER_END_MINIFY_CACHE,
array(
W3TC_MARKER_BEGIN_PGCACHE_CACHE => 0,
W3TC_MARKER_BEGIN_BROWSERCACHE_CACHE => 0,
W3TC_MARKER_BEGIN_MINIFY_CORE => 0,
W3TC_MARKER_BEGIN_PGCACHE_CORE => 0,
W3TC_MARKER_BEGIN_WORDPRESS => 0,
)
);
}
/**
* Removes cache rules for minification.
*
* @param array $exs Array of existing rules to be modified or removed.
*
* @return void
*/
private function rules_cache_remove( $exs ) {
// apache's cache files are not used when core rules disabled.
if ( ! Util_Environment::is_nginx() ) {
return;
}
Util_Rule::remove_rules(
$exs,
Util_Rule::get_minify_rules_cache_path(),
W3TC_MARKER_BEGIN_MINIFY_CACHE,
W3TC_MARKER_END_MINIFY_CACHE
);
}
/**
* Generates cache rules based on the server environment.
*
* @param Config $config W3TC Config containing relevant settings.
*
* @return string Generated cache rules.
*/
private function rules_cache_generate( $config ) {
switch ( true ) {
case Util_Environment::is_apache():
case Util_Environment::is_litespeed():
return $this->rules_cache_generate_apache( $config );
case Util_Environment::is_nginx():
return $this->rules_cache_generate_nginx( $config );
}
return '';
}
/**
* Generates Apache cache rules for minification.
*
* @param Config $config W3TC Config containing relevant settings.
*
* @return string Generated Apache cache rules.
*/
private function rules_cache_generate_apache( $config ) {
$browsercache = $config->get_boolean( 'browsercache.enabled' );
$brotli = ( $browsercache && $config->get_boolean( 'browsercache.cssjs.brotli' ) );
$compression = ( $browsercache && $config->get_boolean( 'browsercache.cssjs.compression' ) );
$expires = ( $browsercache && $config->get_boolean( 'browsercache.cssjs.expires' ) );
$lifetime = ( $browsercache ? $config->get_integer( 'browsercache.cssjs.lifetime' ) : 0 );
$cache_control = ( $browsercache && $config->get_boolean( 'browsercache.cssjs.cache.control' ) );
$etag = ( $browsercache && $config->get_integer( 'browsercache.html.etag' ) );
$w3tc = ( $browsercache && $config->get_integer( 'browsercache.cssjs.w3tc' ) );
$compatibility = $config->get_boolean( 'pgcache.compatibility' );
$rules = '';
$rules .= W3TC_MARKER_BEGIN_MINIFY_CACHE . "\n";
// workaround for .gzip.
if ( $compatibility ) {
$rules .= "Options -MultiViews\n";
}
if ( $etag ) {
$rules .= "FileETag MTime Size\n";
}
if ( $brotli ) {
$rules .= "\n";
$rules .= " AddType text/css .css_br\n";
$rules .= " AddEncoding br .css_br\n";
$rules .= " AddType application/x-javascript .js_br\n";
$rules .= " AddEncoding br .js_br\n";
$rules .= "\n";
$rules .= "\n";
$rules .= " \n";
$rules .= " SetEnvIfNoCase Request_URI \\.css_br$ no-brotli\n";
$rules .= " SetEnvIfNoCase Request_URI \\.js_br$ no-brotli\n";
$rules .= " \n";
$rules .= "\n";
}
if ( $compression ) {
$rules .= "\n";
$rules .= " AddType text/css .css_gzip\n";
$rules .= " AddEncoding gzip .css_gzip\n";
$rules .= " AddType application/x-javascript .js_gzip\n";
$rules .= " AddEncoding gzip .js_gzip\n";
$rules .= "\n";
$rules .= "\n";
$rules .= " \n";
$rules .= " SetEnvIfNoCase Request_URI \\.css_gzip$ no-gzip\n";
$rules .= " SetEnvIfNoCase Request_URI \\.js_gzip$ no-gzip\n";
$rules .= " \n";
$rules .= "\n";
}
if ( $expires ) {
$rules .= "\n";
$rules .= " ExpiresActive On\n";
$rules .= " ExpiresByType text/css A" . $lifetime . "\n";
$rules .= " ExpiresByType application/x-javascript A" . $lifetime . "\n";
$rules .= "\n";
}
if ( $w3tc || $brotli || $compression || $cache_control ) {
$rules .= "\n";
if ( $w3tc ) {
$rules .= " Header set X-Powered-By \"" . Util_Environment::w3tc_header() . "\"\n";
}
if ( $brotli || $compression ) {
$rules .= " Header set Vary \"Accept-Encoding\"\n";
}
if ( $cache_control ) {
$cache_policy = $config->get_string( 'browsercache.cssjs.cache.policy' );
switch ( $cache_policy ) {
case 'cache':
$rules .= " Header set Pragma \"public\"\n";
$rules .= " Header set Cache-Control \"public\"\n";
break;
case 'cache_public_maxage':
$rules .= " Header set Pragma \"public\"\n";
if ( $expires ) {
$rules .= " Header append Cache-Control \"public\"\n";
} else {
$rules .= " Header set Cache-Control \"max-age=" . $lifetime . ", public\"\n";
}
break;
case 'cache_validation':
$rules .= " Header set Pragma \"public\"\n";
$rules .= " Header set Cache-Control \"public, must-revalidate, proxy-revalidate\"\n";
break;
case 'cache_noproxy':
$rules .= " Header set Pragma \"public\"\n";
$rules .= " Header set Cache-Control \"private, must-revalidate\"\n";
break;
case 'cache_maxage':
$rules .= " Header set Pragma \"public\"\n";
if ( $expires ) {
$rules .= " Header append Cache-Control \"public, must-revalidate, proxy-revalidate\"\n";
} else {
$rules .= " Header set Cache-Control \"max-age=" . $lifetime . ", public, must-revalidate, proxy-revalidate\"\n";
}
break;
case 'no_cache':
$rules .= " Header set Pragma \"no-cache\"\n";
$rules .= " Header set Cache-Control \"max-age=0, private, no-store, no-cache, must-revalidate\"\n";
break;
case 'no_store':
$rules .= " Header set Pragma \"no-store\"\n";
$rules .= " Header set Cache-Control \"no-store\"\n";
break;
case 'cache_immutable':
$rules .= " Header set Pragma \"public\"\n";
$rules .= " Header set Cache-Control \"public, max-age=" . $lifetime . ", immutable\"\n";
break;
case 'cache_immutable_nomaxage':
$rules .= " Header set Pragma \"public\"\n";
$rules .= " Header set Cache-Control \"public, immutable\"\n";
break;
}
}
$rules .= "\n";
}
$rules .= W3TC_MARKER_END_MINIFY_CACHE . "\n";
return $rules;
}
/**
* Generates NGINX cache rules for minification.
*
* @param Config $config W3TC Config containing relevant settings.
*
* @return string Generated NGINX cache rules.
*/
private function rules_cache_generate_nginx( $config ) {
$cache_uri = Util_Environment::url_to_uri( Util_Environment::filename_to_url( W3TC_CACHE_MINIFY_DIR ) ) . '/';
$browsercache = $config->get_boolean( 'browsercache.enabled' );
$brotli = ( $browsercache && $config->get_boolean( 'browsercache.cssjs.brotli' ) );
$gzip = ( $browsercache && $config->get_boolean( 'browsercache.cssjs.compression' ) );
$rules = '';
$rules .= W3TC_MARKER_BEGIN_MINIFY_CACHE . "\n";
$common_rules_a = Dispatcher::nginx_rules_for_browsercache_section( $config, 'cssjs', true );
$common_rules_a[] = 'add_header Vary "Accept-Encoding";';
$common_rules = ' ' . implode( "\n ", $common_rules_a ) . "\n";
if ( $brotli ) {
$rules .= "location ~ " . $cache_uri . ".*js_br$ {\n";
$rules .= " brotli off;\n";
$rules .= " types {}\n";
$rules .= " default_type application/x-javascript;\n";
$rules .= " add_header Content-Encoding br;\n";
$rules .= $common_rules;
$rules .= "}\n";
$rules .= "location ~ " . $cache_uri . ".*css_br$ {\n";
$rules .= " brotli off;\n";
$rules .= " types {}\n";
$rules .= " default_type text/css;\n";
$rules .= " add_header Content-Encoding br;\n";
$rules .= $common_rules;
$rules .= "}\n";
}
if ( $gzip ) {
$rules .= "location ~ " . $cache_uri . ".*js_gzip$ {\n";
$rules .= " gzip off;\n";
$rules .= " types {}\n";
$rules .= " default_type application/x-javascript;\n";
$rules .= " add_header Content-Encoding gzip;\n";
$rules .= $common_rules;
$rules .= "}\n";
$rules .= "location ~ " . $cache_uri . ".*css_gzip$ {\n";
$rules .= " gzip off;\n";
$rules .= " types {}\n";
$rules .= " default_type text/css;\n";
$rules .= " add_header Content-Encoding gzip;\n";
$rules .= $common_rules;
$rules .= "}\n";
}
$rules .= W3TC_MARKER_END_MINIFY_CACHE . "\n";
return $rules;
}
/**
* Modifies or generates LiteSpeed browser cache rules for a specific section.
*
* @param string $section_rules Existing rules for the specified section.
* @param Config $config W3TC Config containing relevant settings.
* @param string $section Section name to modify or generate rules for.
*
* @return string Modified or generated rules for the specified section.
*/
public function w3tc_browsercache_rules_section( $section_rules, $config, $section ) {
if ( Util_Environment::is_litespeed() ) {
$o = new Minify_Environment_LiteSpeed( $config );
$section_rules = $o->w3tc_browsercache_rules_section( $section_rules, $section );
}
return $section_rules;
}
}