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PgCache_Environment.php
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<?php
/**
* File: PgCache_Environment.php
*
* @package W3TC
*/
namespace W3TC;
/**
* Class PgCache_Environment
*
* phpcs:disable WordPress.PHP.NoSilencedErrors.Discouraged
* phpcs:disable WordPress.WP.AlternativeFunctions
* phpcs:disable WordPress.NamingConventions.ValidVariableName.VariableNotSnakeCase
*/
class PgCache_Environment {
/**
* Fixes environment settings on WP admin request.
*
* @param Config $config Configuration object containing environment settings.
* @param bool $force_all_checks Whether to force all checks regardless of current configuration.
*
* @return void
*
* @throws \Util_Environment_Exceptions If there are unresolved exceptions during the fixing process.
*/
public function fix_on_wpadmin_request( $config, $force_all_checks ) {
$exs = new Util_Environment_Exceptions();
$pgcache_enabled = $config->get_boolean( 'pgcache.enabled' );
$engine = $config->get_string( 'pgcache.engine' );
if ( ( ! defined( 'WP_CACHE' ) || ! WP_CACHE ) ) {
try {
$this->wp_config_add_directive();
} catch ( Util_WpFile_FilesystemOperationException $ex ) {
$exs->push( $ex );
}
}
$this->fix_folders( $config, $exs );
if ( $config->get_boolean( 'config.check' ) || $force_all_checks ) {
if ( $this->is_rules_required( $config ) ) {
$this->rules_core_add( $config, $exs );
$this->rules_cache_add( $config, $exs );
} else {
$this->rules_core_remove( $exs );
$this->rules_cache_remove( $exs );
}
}
// if no errors so far - check if rewrite actually works.
if ( count( $exs->exceptions() ) <= 0 ) {
try {
if ( $pgcache_enabled && 'file_generic' === $engine ) {
$this->verify_file_generic_compatibility();
if ( $config->get_boolean( 'pgcache.debug' ) ) {
$this->verify_file_generic_rewrite_working();
}
}
} catch ( \Exception $ex ) {
$exs->push( $ex );
}
}
if ( count( $exs->exceptions() ) > 0 ) {
throw $exs;
}
}
/**
* Adjusts settings based on a specific event.
*
* @param Config $config W3TC Config containing relevant settings.
* @param string $event The name of the event triggering the adjustment.
* @param Config|null $old_config Optional. Previous W3TC Config object for comparison.
*
* @return void
*/
public function fix_on_event( $config, $event, $old_config = null ) {
$pgcache_enabled = $config->get_boolean( 'pgcache.enabled' );
$engine = $config->get_string( 'pgcache.engine' );
// Schedules events.
if ( $pgcache_enabled && ( 'file' === $engine || 'file_generic' === $engine ) ) {
$new_interval = $config->get_integer( 'pgcache.file.gc' );
$old_interval = $old_config ? $old_config->get_integer( 'pgcache.file.gc' ) : -1;
if ( null !== $old_config && $new_interval !== $old_interval ) {
$this->unschedule_gc();
}
if ( ! wp_next_scheduled( 'w3_pgcache_cleanup' ) ) {
wp_schedule_event( time(), 'w3_pgcache_cleanup', 'w3_pgcache_cleanup' );
}
} else {
$this->unschedule_gc();
}
// Schedule prime event.
if ( $pgcache_enabled && $config->get_boolean( 'pgcache.prime.enabled' ) ) {
$new_interval = $config->get_integer( 'pgcache.prime.interval' );
$old_interval = $old_config ? $old_config->get_integer( 'pgcache.prime.interval' ) : -1;
if ( null !== $old_config && $new_interval !== $old_interval ) {
$this->unschedule_prime();
}
if ( ! wp_next_scheduled( 'w3_pgcache_prime' ) ) {
wp_schedule_event( time(), 'w3_pgcache_prime', 'w3_pgcache_prime' );
}
} else {
$this->unschedule_prime();
}
}
/**
* Fixes the environment after plugin deactivation.
*
* @return void
*
* @throws \Util_Environment_Exceptions If exceptions occur during cleanup.
*/
public function fix_after_deactivation() {
$exs = new Util_Environment_Exceptions();
try {
$this->wp_config_remove_directive( $exs );
} catch ( Util_WpFile_FilesystemOperationException $ex ) {
$exs->push( $ex );
}
$this->rules_core_remove( $exs );
$this->rules_cache_remove( $exs );
$this->unschedule_gc();
$this->unschedule_prime();
$this->unschedule_purge_wpcron();
if ( count( $exs->exceptions() ) > 0 ) {
throw $exs;
}
}
/**
* Determines if rules are required for the configuration.
*
* @since 0.9.7.3
*
* @param Config $c W3TC Config containing relevant settings.
*
* @return bool True if rules are required, false otherwise.
*/
private function is_rules_required( $c ) {
$e = $c->get_string( 'pgcache.engine' );
return $c->get_boolean( 'pgcache.enabled' ) && ( 'file_generic' === $e || 'nginx_memcached' === $e );
}
/**
* Retrieves the required rules for the environment.
*
* @param Config $config W3TC Config containing relevant settings.
*
* @return array|null Array of required rules or null if none are required.
*/
public function get_required_rules( $config ) {
if ( ! $this->is_rules_required( $config ) ) {
return null;
}
$rewrite_rules = array();
$pgcache_rules_core_path = Util_Rule::get_pgcache_rules_core_path();
$rewrite_rules[] = array(
'filename' => $pgcache_rules_core_path,
'content' => $this->rules_core_generate( $config ),
'priority' => 1000,
);
$pgcache_rules_cache_path = Util_Rule::get_pgcache_rules_cache_path();
$rewrite_rules[] = array(
'filename' => $pgcache_rules_cache_path,
'content' => $this->rules_cache_generate( $config ),
);
return $rewrite_rules;
}
/**
* Ensures folders meet the required settings for caching.
*
* @param Config $config W3TC Config containing relevant settings.
* @param object $exs Exception handler object.
*
* @return void
*/
private function fix_folders( $config, $exs ) {
if ( ! $config->get_boolean( 'pgcache.enabled' ) ) {
return;
}
// folder that we delete if exists and not writeable.
if ( 'file_generic' === $config->get_string( 'pgcache.engine' ) ) {
$dir = W3TC_CACHE_PAGE_ENHANCED_DIR;
} elseif ( 'file' !== $config->get_string( 'pgcache.engine' ) ) {
$dir = W3TC_CACHE_DIR . '/page';
} else {
return;
}
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 compatibility for file-based generic caching.
*
* @return void
*
* @throws \Util_Environment_Exception If the permalink structure is incompatible.
*/
private function verify_file_generic_compatibility() {
$permalink_structure = get_option( 'permalink_structure' );
if ( empty( $permalink_structure ) ) {
throw new Util_Environment_Exception( 'Disk Enhanced mode can\'t work with "Default" permalinks structure' );
}
}
/**
* Validates the functionality of file-based rewrite rules.
*
* @return void
*
* @throws \Util_Environment_Exception If rewrite rules are not functioning as expected.
*/
private function verify_file_generic_rewrite_working() {
$url = get_home_url() . '/w3tc_rewrite_test' . wp_rand();
if ( ! $this->test_rewrite( $url ) ) {
$key = sprintf( 'w3tc_rewrite_test_result_%s', substr( md5( $url ), 0, 16 ) );
$result = get_transient( $key );
$home_url = get_home_url();
$tech_message =
( Util_Environment::is_nginx() ? 'nginx configuration file' : '.htaccess file' ) .
' contains rules to rewrite url ' . $home_url . '/w3tc_rewrite_test into ' .
$home_url . '/?w3tc_rewrite_test which, if handled by plugin, return "OK" message.<br/>' .
'The plugin made a request to ' . $home_url . '/w3tc_rewrite_test but received: <br />' .
$result . '<br />instead of "OK" response. <br />';
$error = '<strong>W3 Total Cache error:</strong> It appears Page Cache ' .
'<acronym title="Uniform Resource Locator">URL</acronym> rewriting is not working. ';
if ( Util_Environment::is_preview_mode() ) {
$error .= ' This could be due to using Preview mode. <a href="' . $url .
'">Click here</a> to manually verify its working. It should say OK. <br />';
}
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 .= '<br />Unfortunately disk enhanced page caching will ' .
'not function without custom rewrite rules. ' .
'Please ask your server administrator for assistance. Also refer to <a href="' .
admin_url( 'admin.php?page=w3tc_install' ) .
'">the install page</a> for the rules for your server.';
throw new Util_Environment_Exception(
esc_html( $error ),
esc_html( $tech_message )
);
}
}
/**
* Tests the rewrite rule functionality.
*
* @param string $url URL to test.
*
* @return bool True if the rewrite works, false otherwise.
*/
private function test_rewrite( $url ) {
$key = sprintf( 'w3tc_rewrite_test_%s', substr( md5( $url ), 0, 16 ) );
$result = get_transient( $key );
if ( false === $result ) {
$response = Util_Http::get( $url );
$result = (
! is_wp_error( $response ) &&
200 === $response['response']['code'] &&
'OK' === trim( $response['body'] )
);
if ( $result ) {
set_transient( $key, $result, 30 );
} else {
$key_result = sprintf( 'w3tc_rewrite_test_result_%s', substr( md5( $url ), 0, 16 ) );
set_transient(
$key_result,
is_wp_error( $response ) ? $response->get_error_message() : implode( ' ', $response['response'] ),
30
);
}
}
return $result;
}
/**
* Unschedules the garbage collection task.
*
* @return void
*/
private function unschedule_gc() {
if ( wp_next_scheduled( 'w3_pgcache_cleanup' ) ) {
wp_clear_scheduled_hook( 'w3_pgcache_cleanup' );
}
}
/**
* Unschedules the page cache priming task.
*
* @return void
*/
private function unschedule_prime() {
if ( wp_next_scheduled( 'w3_pgcache_prime' ) ) {
wp_clear_scheduled_hook( 'w3_pgcache_prime' );
}
}
/**
* Unschedules the purge WP Cron task.
*
* @since 2.8.0
*
* @return void
*/
private function unschedule_purge_wpcron() {
if ( wp_next_scheduled( 'w3tc_pgcache_purge_wpcron' ) ) {
wp_clear_scheduled_hook( 'w3tc_pgcache_purge_wpcron' );
}
}
/**
* Adds required directives to the wp-config.php file.
*
* @return void
*
* @throws \Util_WpFile_FilesystemModifyException If modifications to the file fail.
*
* phpcs:disable WordPress.Security.EscapeOutput.ExceptionNotEscaped
*/
private function wp_config_add_directive() {
$config_path = Util_Environment::wp_config_path();
$config_data = @file_get_contents( $config_path );
if ( false === $config_data ) {
return;
}
$new_config_data = $this->wp_config_remove_from_content( $config_data );
$new_config_data = preg_replace(
'~<\?(php)?~',
"\\0\r\n" . $this->wp_config_addon(),
$new_config_data,
1
);
if ( $new_config_data !== $config_data ) {
try {
Util_WpFile::write_to_file( $config_path, $new_config_data );
} catch ( Util_WpFile_FilesystemOperationException $ex ) {
throw new Util_WpFile_FilesystemModifyException(
$ex->getMessage(),
$ex->credentials_form(),
'Edit file <strong>' . $config_path . '</strong> and add next lines:',
$config_path,
$this->wp_config_addon()
);
}
}
// that file was in opcache for sure and it may take time to
// start execution of new modified now version.
$o = Dispatcher::component( 'SystemOpCache_Core' );
$o->flush();
}
/**
* Removes added directives from the wp-config.php file.
*
* @return void
*
* @throws \Util_WpFile_FilesystemModifyException If modifications to the file fail.
*/
private function wp_config_remove_directive() {
$config_path = Util_Environment::wp_config_path();
$config_data = @file_get_contents( $config_path );
if ( false === $config_data ) {
return;
}
$new_config_data = $this->wp_config_remove_from_content( $config_data );
if ( $new_config_data !== $config_data ) {
try {
Util_WpFile::write_to_file( $config_path, $new_config_data );
} catch ( Util_WpFile_FilesystemOperationException $ex ) {
throw new Util_WpFile_FilesystemModifyException(
$ex->getMessage(),
$ex->credentials_form(),
'Edit file <strong>' . $config_path . '</strong> and remove next lines:',
$config_path,
$this->wp_config_addon()
);
}
}
}
/**
* Generates the addon directive content for wp-config.php.
*
* @return string The directive content.
*/
private function wp_config_addon() {
return "/** Enable W3 Total Cache */\r\ndefine('WP_CACHE', true); // Added by W3 Total Cache\r\n";
}
/**
* Removes W3TC directives from wp-config.php content.
*
* @param string $config_data The content of wp-config.php.
*
* @return string Modified content without W3TC directives.
*/
private function wp_config_remove_from_content( $config_data ) {
$config_data = preg_replace(
"~\\/\\*\\* Enable W3 Total Cache \\*\\*?\\/.*?\\/\\/ Added by W3 Total Cache(\r\n)*~s",
'',
$config_data
);
$config_data = preg_replace(
"~(\\/\\/\\s*)?define\\s*\\(\\s*['\"]?WP_CACHE['\"]?\\s*,.*?\\)\\s*;+\\r?\\n?~is",
'',
$config_data
);
return $config_data;
}
/**
* Adds core rules to the configuration.
*
* @param Config $config W3TC Config containing relevant settings.
* @param object $exs Exception handler object.
*
* @return void
*/
private function rules_core_add( $config, $exs ) {
Util_Rule::add_rules(
$exs,
Util_Rule::get_pgcache_rules_core_path(),
$this->rules_core_generate( $config ),
W3TC_MARKER_BEGIN_PGCACHE_CORE,
W3TC_MARKER_END_PGCACHE_CORE,
array(
W3TC_MARKER_BEGIN_WORDPRESS => 0,
W3TC_MARKER_END_MINIFY_CORE => strlen( W3TC_MARKER_END_MINIFY_CORE ) + 1,
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,
),
true
);
}
/**
* Removes core rules from the configuration.
*
* @param object $exs Exception handler object.
*
* @return void
*/
private function rules_core_remove( $exs ) {
Util_Rule::remove_rules(
$exs,
Util_Rule::get_pgcache_rules_core_path(),
W3TC_MARKER_BEGIN_PGCACHE_CORE,
W3TC_MARKER_END_PGCACHE_CORE
);
}
/**
* Generates the core rules based on the server environment.
*
* @param Config $config W3TC Config containing relevant settings.
*
* @return string Generated rules as a string.
*/
private 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 '';
}
/**
* Generates Apache rewrite rules for page caching.
*
* @param \W3TC\Config $config Configuration object containing various settings for the cache.
*
* @return string The generated Apache rewrite rules.
*/
private function rules_core_generate_apache( $config ) {
$rewrite_base = Util_Environment::network_home_url_uri();
$cache_dir = Util_Environment::normalize_path( W3TC_CACHE_PAGE_ENHANCED_DIR );
$permalink_structure = get_option( 'permalink_structure' );
$current_user = wp_get_current_user();
// Auto reject cookies.
$reject_cookies = array(
'comment_author',
'wp-postpass',
);
$reject_cookies[] = 'w3tc_logged_out';
// Reject cache for logged in users OR Reject cache for roles if any.
if ( $config->get_boolean( 'pgcache.reject.logged' ) ) {
$reject_cookies = array_merge(
$reject_cookies,
array(
'wordpress_logged_in',
)
);
} elseif ( $config->get_boolean( 'pgcache.reject.logged_roles' ) ) {
$new_cookies = array();
foreach ( $config->get_array( 'pgcache.reject.roles' ) as $role ) {
$new_cookies[] = 'w3tc_logged_' . md5( NONCE_KEY . $role );
}
$reject_cookies = array_merge( $reject_cookies, $new_cookies );
}
// Custom config.
$reject_cookies = array_merge( $reject_cookies, $config->get_array( 'pgcache.reject.cookie' ) );
Util_Rule::array_trim( $reject_cookies );
$reject_user_agents = $config->get_array( 'pgcache.reject.ua' );
if ( $config->get_boolean( 'pgcache.compatibility' ) ) {
$reject_user_agents = array_merge( array( W3TC_POWERED_BY ), $reject_user_agents );
}
Util_Rule::array_trim( $reject_user_agents );
// Generate directives.
$env_W3TC_UA = '';
$env_W3TC_REF = '';
$env_W3TC_COOKIE = '';
$env_W3TC_SSL = '';
$env_W3TC_ENC = '';
$rules = '';
$rules .= W3TC_MARKER_BEGIN_PGCACHE_CORE . "\n";
$rules .= "<IfModule mod_rewrite.c>\n";
$rules .= " RewriteEngine On\n";
$rules .= ' RewriteBase ' . $rewrite_base . "\n";
if ( $config->get_boolean( 'pgcache.debug' ) ) {
$rules .= " RewriteRule ^(.*\\/)?w3tc_rewrite_test([0-9]+)/?$ $1?w3tc_rewrite_test=1 [L]\n";
}
// Set accept query strings.
$w3tc_query_strings = apply_filters(
'w3tc_pagecache_rules_apache_accept_qs',
$config->get_array( 'pgcache.accept.qs' )
);
Util_Rule::array_trim( $w3tc_query_strings );
if ( ! empty( $w3tc_query_strings ) ) {
$w3tc_query_strings = str_replace( ' ', '+', $w3tc_query_strings );
$w3tc_query_strings = array_map( array( '\W3TC\Util_Environment', 'preg_quote' ), $w3tc_query_strings );
$rules .= " RewriteRule ^ - [E=W3TC_QUERY_STRING:%{QUERY_STRING}]\n";
foreach ( $w3tc_query_strings as $query ) {
$query_rules = array();
if ( strpos( $query, '=' ) === false ) {
$query_rules[] = 'RewriteCond %{ENV:W3TC_QUERY_STRING} ^(.*?&|)' .
$query . '(=[^&]*)?(&.*|)$ [NC]';
$query_rules[] = 'RewriteRule ^ - [E=W3TC_QUERY_STRING:%1%3]';
} else {
$query_rules[] = 'RewriteCond %{ENV:W3TC_QUERY_STRING} ^(.*?&|)' .
$query . '(&.*|)$ [NC]';
$query_rules[] = 'RewriteRule ^ - [E=W3TC_QUERY_STRING:%1%2]';
}
$query_rules = apply_filters(
'w3tc_pagecache_rules_apache_accept_qs_rules',
$query_rules,
$query
);
$rules .= ' ' . implode( "\n ", $query_rules ) . "\n";
}
$rules .= " RewriteCond %{ENV:W3TC_QUERY_STRING} ^&+$\n";
$rules .= " RewriteRule ^ - [E=W3TC_QUERY_STRING]\n";
}
// Check for mobile redirect.
if ( $config->get_boolean( 'mobile.enabled' ) ) {
$mobile_groups = $config->get_array( 'mobile.rgroups' );
foreach ( $mobile_groups as $mobile_group => $mobile_config ) {
$mobile_enabled = ( isset( $mobile_config['enabled'] ) ? (bool) $mobile_config['enabled'] : false );
$mobile_agents = ( isset( $mobile_config['agents'] ) ? (array) $mobile_config['agents'] : '' );
$mobile_redirect = ( isset( $mobile_config['redirect'] ) ? $mobile_config['redirect'] : '' );
if ( $mobile_enabled && count( $mobile_agents ) && $mobile_redirect ) {
$rules .= ' RewriteCond %{HTTP_USER_AGENT} (' . implode( '|', $mobile_agents ) . ") [NC]\n";
$rules .= ' RewriteRule .* ' . $mobile_redirect . " [R,L]\n";
}
}
}
// Check for referrer redirect.
if ( $config->get_boolean( 'referrer.enabled' ) ) {
$referrer_groups = $config->get_array( 'referrer.rgroups' );
foreach ( $referrer_groups as $referrer_group => $referrer_config ) {
$referrer_enabled = ( isset( $referrer_config['enabled'] ) ? (bool) $referrer_config['enabled'] : false );
$referrer_referrers = ( isset( $referrer_config['referrers'] ) ? (array) $referrer_config['referrers'] : '' );
$referrer_redirect = ( isset( $referrer_config['redirect'] ) ? $referrer_config['redirect'] : '' );
if ( $referrer_enabled && count( $referrer_referrers ) && $referrer_redirect ) {
$rules .= ' RewriteCond %{HTTP_COOKIE} w3tc_referrer=.*(' . implode( '|', $referrer_referrers ) . ") [NC]\n";
$rules .= ' RewriteRule .* ' . $referrer_redirect . " [R,L]\n";
}
}
}
// Set mobile groups.
if ( $config->get_boolean( 'mobile.enabled' ) ) {
$mobile_groups = array_reverse( $config->get_array( 'mobile.rgroups' ) );
foreach ( $mobile_groups as $mobile_group => $mobile_config ) {
$mobile_enabled = ( isset( $mobile_config['enabled'] ) ? (bool) $mobile_config['enabled'] : false );
$mobile_agents = ( isset( $mobile_config['agents'] ) ? (array) $mobile_config['agents'] : '' );
$mobile_redirect = ( isset( $mobile_config['redirect'] ) ? $mobile_config['redirect'] : '' );
if ( $mobile_enabled && count( $mobile_agents ) && ! $mobile_redirect ) {
$rules .= ' RewriteCond %{HTTP_USER_AGENT} (' . implode( '|', $mobile_agents ) . ") [NC]\n";
$rules .= ' RewriteRule .* - [E=W3TC_UA:_' . $mobile_group . "]\n";
$env_W3TC_UA = '%{ENV:W3TC_UA}';
}
}
}
// Set referrer groups.
if ( $config->get_boolean( 'referrer.enabled' ) ) {
$referrer_groups = array_reverse( $config->get_array( 'referrer.rgroups' ) );
foreach ( $referrer_groups as $referrer_group => $referrer_config ) {
$referrer_enabled = ( isset( $referrer_config['enabled'] ) ? (bool) $referrer_config['enabled'] : false );
$referrer_referrers = ( isset( $referrer_config['referrers'] ) ? (array) $referrer_config['referrers'] : '' );
$referrer_redirect = ( isset( $referrer_config['redirect'] ) ? $referrer_config['redirect'] : '' );
if ( $referrer_enabled && count( $referrer_referrers ) && ! $referrer_redirect ) {
$rules .= ' RewriteCond %{HTTP_COOKIE} w3tc_referrer=.*(' . implode( '|', $referrer_referrers ) . ") [NC]\n";
$rules .= ' RewriteRule .* - [E=W3TC_REF:_' . $referrer_group . "]\n";
$env_W3TC_REF = '%{ENV:W3TC_REF}';
}
}
}
// Set cookie group.
if ( $config->get_boolean( 'pgcache.cookiegroups.enabled' ) ) {
$cookie_groups = $config->get_array( 'pgcache.cookiegroups.groups' );
foreach ( $cookie_groups as $group_name => $g ) {
if ( isset( $g['enabled'] ) && $g['enabled'] ) {
$cookies = array();
foreach ( $g['cookies'] as $cookie ) {
$cookie = trim( $cookie );
if ( ! empty( $cookie ) ) {
$cookie = str_replace( '+', ' ', $cookie );
$cookie = Util_Environment::preg_quote( $cookie );
if ( strpos( $cookie, '=' ) === false ) {
$cookie .= '=.*';
}
$cookies[] = $cookie;
}
}
if ( count( $cookies ) > 0 ) {
$cookies_regexp = '^(.*;\s*)?(' . implode( '|', $cookies ) . ')(\s*;.*)?$';
$rules .= " RewriteCond %{HTTP_COOKIE} $cookies_regexp [NC]\n";
$rules .= ' RewriteRule .* - [E=W3TC_COOKIE:_' . $group_name . "]\n";
$env_W3TC_COOKIE = '%{ENV:W3TC_COOKIE}';
}
}
}
}
// Set HTTPS.
if ( $config->get_boolean( 'pgcache.cache.ssl' ) ) {
$rules .= " RewriteCond %{HTTPS} =on\n";
$rules .= " RewriteRule .* - [E=W3TC_SSL:_ssl]\n";
$rules .= " RewriteCond %{SERVER_PORT} =443\n";
$rules .= " RewriteRule .* - [E=W3TC_SSL:_ssl]\n";
$rules .= " RewriteCond %{HTTP:X-Forwarded-Proto} =https [NC]\n";
$rules .= " RewriteRule .* - [E=W3TC_SSL:_ssl]\n";
$env_W3TC_SSL = '%{ENV:W3TC_SSL}';
}
$cache_path = str_replace( Util_Environment::document_root(), '', $cache_dir );
// Set Accept-Encoding gzip.
if ( $config->get_boolean( 'browsercache.enabled' ) && $config->get_boolean( 'browsercache.html.compression' ) ) {
$rules .= " RewriteCond %{HTTP:Accept-Encoding} gzip\n";
$rules .= " RewriteRule .* - [E=W3TC_ENC:_gzip]\n";
$env_W3TC_ENC = '%{ENV:W3TC_ENC}';
}
// Set Accept-Encoding brotli.
if ( $config->get_boolean( 'browsercache.enabled' ) && $config->get_boolean( 'browsercache.html.brotli' ) ) {
$rules .= " RewriteCond %{HTTP:Accept-Encoding} br\n";
$rules .= " RewriteRule .* - [E=W3TC_ENC:_br]\n";
$env_W3TC_ENC = '%{ENV:W3TC_ENC}';
}
$rules .= " RewriteCond %{HTTP_COOKIE} w3tc_preview [NC]\n";
$rules .= " RewriteRule .* - [E=W3TC_PREVIEW:_preview]\n";
$env_W3TC_PREVIEW = '%{ENV:W3TC_PREVIEW}';
$rules .= " RewriteCond %{REQUEST_URI} \\/$\n";
$rules .= " RewriteRule .* - [E=W3TC_SLASH:_slash]\n";
$env_W3TC_SLASH = '%{ENV:W3TC_SLASH}';
$use_cache_rules = '';
// Don't accept POSTs.
$use_cache_rules .= " RewriteCond %{REQUEST_METHOD} !=POST\n";
// Query string should be empty.
$use_cache_rules .= empty( $w3tc_query_strings ) ?
" RewriteCond %{QUERY_STRING} =\"\"\n" :
" RewriteCond %{ENV:W3TC_QUERY_STRING} =\"\"\n";
// Check for rejected cookies.
$use_cache_rules .= ' RewriteCond %{HTTP_COOKIE} !(' . implode(
'|',
array_map(
array(
'\W3TC\Util_Environment',
'preg_quote',
),
$reject_cookies
)
) . ") [NC]\n";
// Check for rejected user agents.
if ( count( $reject_user_agents ) ) {
$use_cache_rules .= ' RewriteCond %{HTTP_USER_AGENT} !(' . implode(
'|',
array_map(
array(
'\W3TC\Util_Environment',
'preg_quote',
),
$reject_user_agents
)
) . ") [NC]\n";
}
$use_cache_rules = apply_filters(
'w3tc_pagecache_rules_apache_rewrite_cond',
$use_cache_rules
);
// Make final rewrites for specific files.
$uri_prefix = $cache_path . '/%{HTTP_HOST}/%{REQUEST_URI}/_index' . $env_W3TC_SLASH .
$env_W3TC_UA . $env_W3TC_REF . $env_W3TC_COOKIE . $env_W3TC_SSL . $env_W3TC_PREVIEW;
$uri_prefix = apply_filters( 'w3tc_pagecache_rules_apache_uri_prefix', $uri_prefix );
$switch = ' -' . ( $config->get_boolean( 'pgcache.file.nfs' ) ? 'F' : 'f' );
$document_root = Util_Rule::apache_docroot_variable();
// write rule to rewrite to .html/.xml file.
$exts = array( '.html' );
if ( $config->get_boolean( 'pgcache.cache.nginx_handle_xml' ) ) {
$exts[] = '.xml';
}
/**
* Filter: Allow adding additional rules at the end of the PGCACHE_CORE block, before the last rule.
*
* @since 2.7.1
*
* @param string $rules Additional rules.
* @param string $use_cache_rules Rewrite conditions for non-POST, empty query string, rejected cookies, and rejected user agents.
* @param string $document_root Document root.
* @param string $uri_prefix URI prefix, after the "w3tc_pagecache_rules_apache_uri_prefix" WP filter.
* @param array $exts File extensions used; iterate to use them all.
* @param string $env_W3TC_ENC Encoding string: "", "_br", or "_gzip".
*/
$rules = \apply_filters(
'w3tc_pgcache_rules_apache_last',
$rules,
$use_cache_rules,
$document_root,
$uri_prefix,
$env_W3TC_ENC
);
foreach ( $exts as $ext ) {
$rules .= $use_cache_rules;
$rules .= ' RewriteCond "' . $document_root . $uri_prefix . $ext . $env_W3TC_ENC .
'"' . $switch . "\n";
$rules .= ' RewriteRule .* "' . $uri_prefix . $ext . $env_W3TC_ENC . "\" [L]\n";
}
$rules .= "</IfModule>\n";
$rules .= W3TC_MARKER_END_PGCACHE_CORE . "\n";
return $rules;
}
/**
* Generates NGINX configuration rules for page cache.
*
* @param \W3TC\Config $config Configuration object containing various settings for the cache.
*
* @return string NGINX rules for page cache.
*/
private function rules_core_generate_nginx( $config ) {
$is_network = Util_Environment::is_wpmu();
$cache_dir = Util_Environment::normalize_path( W3TC_CACHE_PAGE_ENHANCED_DIR );
$permalink_structure = get_option( 'permalink_structure' );
$pgcache_engine = $config->get_string( 'pgcache.engine' );
// Auto reject cookies.
$reject_cookies = array(
'comment_author',
'wp-postpass',
);
if ( 'file_generic' === $pgcache_engine ) {
$reject_cookies[] = 'w3tc_logged_out';
}
// Reject cache for logged in users OR Reject cache for roles if any.
if ( $config->get_boolean( 'pgcache.reject.logged' ) ) {
$reject_cookies = array_merge(
$reject_cookies,
array(
'wordpress_logged_in',
)
);
} elseif ( $config->get_boolean( 'pgcache.reject.logged_roles' ) ) {
$new_cookies = array();
foreach ( $config->get_array( 'pgcache.reject.roles' ) as $role ) {
$new_cookies[] = 'w3tc_logged_' . md5( NONCE_KEY . $role );
}
$reject_cookies = array_merge( $reject_cookies, $new_cookies );
}
// Custom config.
$reject_cookies = array_merge( $reject_cookies, $config->get_array( 'pgcache.reject.cookie' ) );
Util_Rule::array_trim( $reject_cookies );
$reject_user_agents = $config->get_array( 'pgcache.reject.ua' );
if ( $config->get_boolean( 'pgcache.compatibility' ) ) {
$reject_user_agents = array_merge( array( W3TC_POWERED_BY ), $reject_user_agents );
}
Util_Rule::array_trim( $reject_user_agents );
// Generate rules.
$env_w3tc_ua = '';
$env_w3tc_ref = '';
$env_w3tc_cookie = '';
$env_w3tc_ssl = '';
$env_w3tc_ext = '';
$env_w3tc_enc = '';
$env_request_uri = '$request_uri';
$rules = '';
$rules .= W3TC_MARKER_BEGIN_PGCACHE_CORE . "\n";
if ( $config->get_boolean( 'pgcache.debug' ) ) {
$rules .= "rewrite ^(.*\\/)?w3tc_rewrite_test([0-9]+)/?$ $1?w3tc_rewrite_test=1 last;\n";
}
// Set accept query strings.
$w3tc_query_strings = apply_filters(
'w3tc_pagecache_rules_nginx_accept_qs',
$config->get_array( 'pgcache.accept.qs' )
);
Util_Rule::array_trim( $w3tc_query_strings );
if ( ! empty( $w3tc_query_strings ) ) {
$w3tc_query_strings = str_replace( ' ', '+', $w3tc_query_strings );
$w3tc_query_strings = array_map( array( '\W3TC\Util_Environment', 'preg_quote' ), $w3tc_query_strings );
$rules .= "set \$w3tc_query_string \$query_string;\n";
foreach ( $w3tc_query_strings as $query ) {
$query_rules = array();
if ( strpos( $query, '=' ) === false ) {
$query_rules[] = 'if ($w3tc_query_string ~* "^(.*?&|)' . $query . '(=[^&]*)?(&.*|)$") {';
$query_rules[] = ' set $w3tc_query_string $1$3;';
$query_rules[] = '}';
} else {
$query_rules[] = 'if ($w3tc_query_string ~* "^(.*?&|)' . $query . '(&.*|)$") {';
$query_rules[] = ' set $w3tc_query_string $1$2;';
$query_rules[] = '}';
}
$query_rules = apply_filters(
'w3tc_pagecache_rules_nginx_accept_qs_rules',
$query_rules,
$query
);
$rules .= implode( "\n", $query_rules ) . "\n";
}
$rules .= "if (\$w3tc_query_string ~ ^[?&]+$) {\n";
$rules .= " set \$w3tc_query_string \"\";\n";
$rules .= "}\n";
$rules .= "set \$w3tc_request_uri \$request_uri;\n";
$rules .= "if (\$w3tc_request_uri ~* \"^([^?]+)\?\") {\n";
$rules .= " set \$w3tc_request_uri \$1;\n";
$rules .= "}\n";
$env_request_uri = '$w3tc_request_uri';
}
// Check for mobile redirect.
if ( $config->get_boolean( 'mobile.enabled' ) ) {
$mobile_groups = $config->get_array( 'mobile.rgroups' );
foreach ( $mobile_groups as $mobile_group => $mobile_config ) {
$mobile_enabled = ( isset( $mobile_config['enabled'] ) ? (bool) $mobile_config['enabled'] : false );
$mobile_agents = ( isset( $mobile_config['agents'] ) ? (array) $mobile_config['agents'] : '' );
$mobile_redirect = ( isset( $mobile_config['redirect'] ) ? $mobile_config['redirect'] : '' );
if ( $mobile_enabled && count( $mobile_agents ) && $mobile_redirect ) {
$rules .= 'if ($http_user_agent ~* "(' . implode( '|', $mobile_agents ) . ")\") {\n";
$rules .= ' rewrite .* ' . $mobile_redirect . " last;\n";
$rules .= "}\n";
}
}
}
// Check for referrer redirect.
if ( $config->get_boolean( 'referrer.enabled' ) ) {
$referrer_groups = $config->get_array( 'referrer.rgroups' );
foreach ( $referrer_groups as $referrer_group => $referrer_config ) {
$referrer_enabled = ( isset( $referrer_config['enabled'] ) ? (bool) $referrer_config['enabled'] : false );
$referrer_referrers = ( isset( $referrer_config['referrers'] ) ? (array) $referrer_config['referrers'] : '' );
$referrer_redirect = ( isset( $referrer_config['redirect'] ) ? $referrer_config['redirect'] : '' );
if ( $referrer_enabled && count( $referrer_referrers ) &&
$referrer_redirect ) {
$rules .= 'if ($http_cookie ~* "w3tc_referrer=.*(' . implode( '|', $referrer_referrers ) . ")\") {\n";
$rules .= ' rewrite .* ' . $referrer_redirect . " last;\n";
$rules .= "}\n";
}
}
}