| Current File : /home/aventura/www/site/wp-content/plugins/w3-total-cache/Dispatcher.php |
<?php
namespace W3TC;
/**
* Interplugin communication
*/
class Dispatcher {
/**
* return component instance
*/
static public function component( $class ) {
static $instances = array();
if ( !isset( $instances[$class] ) ) {
$full_class = '\\W3TC\\' . $class;
$instances[$class] = new $full_class();
}
$v = $instances[$class]; // Don't return reference
return $v;
}
static public function config() {
return self::component( 'Config' );
}
static public function config_master() {
static $config_master = null;
if ( is_null( $config_master ) ) {
$config_master = new Config( 0 );
}
return $config_master;
}
static public function config_state() {
if ( Util_Environment::blog_id() <= 0 )
return self::config_state_master();
static $config_state = null;
if ( is_null( $config_state ) )
$config_state = new ConfigState( false );
return $config_state;
}
static public function config_state_master() {
static $config_state = null;
if ( is_null( $config_state ) )
$config_state = new ConfigState( true );
return $config_state;
}
static public function config_state_note() {
static $o = null;
if ( is_null( $o ) )
$o = new ConfigStateNote( self::config_state_master(),
self::config_state() );
return $o;
}
/**
* Checks if specific local url is uploaded to CDN
*
* @param string $url
* @return bool
*/
static public function is_url_cdn_uploaded( $url ) {
$minify_enabled = self::config()->get_boolean( 'minify.enabled' );
if ( $minify_enabled ) {
$minify = Dispatcher::component( 'Minify_MinifiedFileRequestHandler' );
$data = $minify->get_url_custom_data( $url );
if ( is_array( $data ) && isset( $data['cdn.status'] ) && $data['cdn.status'] == 'uploaded' ) {
return true;
}
}
// supported only for minify-based urls, futher is not needed now
return false;
}
/**
* Creates file for CDN upload.
* Needed because minify can handle urls of non-existing files but CDN needs
* real file to upload it
*/
static public function create_file_for_cdn( $filename ) {
$minify_enabled = self::config()->get_boolean( 'minify.enabled' );
if ( $minify_enabled ) {
$minify_document_root = Util_Environment::cache_blog_dir( 'minify' ) . '/';
if ( !substr( $filename, 0, strlen( $minify_document_root ) ) == $minify_document_root ) {
// unexpected file name
return;
}
$short_filename = substr( $filename, strlen( $minify_document_root ) );
$minify = Dispatcher::component( 'Minify_MinifiedFileRequestHandler' );
$data = $minify->process( $short_filename, true );
if ( !file_exists( $filename ) && isset( $data['content'] ) ) {
if ( !file_exists( dirname( $filename ) ) )
Util_File::mkdir_from_safe( dirname( $filename ), W3TC_CACHE_DIR );
}
@file_put_contents( $filename, $data['content'] );
}
}
/**
* Called on successful file upload to CDN
*
* @param unknown $file_name
*/
static public function on_cdn_file_upload( $file_name ) {
$minify_enabled = self::config()->get_boolean( 'minify.enabled' );
if ( $minify_enabled ) {
$minify_document_root = Util_Environment::cache_blog_dir( 'minify' ) . '/';
if ( !substr( $file_name, 0, strlen( $minify_document_root ) ) == $minify_document_root ) {
// unexpected file name
return;
}
$short_file_name = substr( $file_name, strlen( $minify_document_root ) );
$minify = Dispatcher::component( 'Minify_MinifiedFileRequestHandler' );
$minify->set_file_custom_data( $short_file_name,
array( 'cdn.status' => 'uploaded' ) );
}
}
/**
* Generates canonical header code for nginx if browsercache plugin has
* to generate it
*
* @param Config $config
* @param boolean $cdnftp if CDN FTP is used
* @param string $section
* @return string
*/
static public function on_browsercache_rules_generation_for_section( $config, $cdnftp,
$section, $add_header_rules ) {
if ( $section != 'other' )
return '';
if ( self::canonical_generated_by( $config, $cdnftp ) != 'browsercache' )
return '';
return Util_RuleSnippet::canonical_without_location( $cdnftp,
$add_header_rules, $config->get_boolean( 'cdn.cors_header') );
}
/**
* Called when minify going to process request of some minified file
*/
static public function requested_minify_filename( $config, $file ) {
// browsercache may alter filestructure, allow it to remove its
// uniqualizator
if ( $config->get_boolean( 'browsercache.enabled' ) &&
$config->get_boolean( 'browsercache.rewrite' ) ) {
if ( preg_match( '~(.+)\.([0-9a-z]+)(\.[^.]+)$~', $file, $m ) )
$file = $m[1] . $m[3];
}
return $file;
}
/**
* Checks whether canonical should be generated or not by browsercache plugin
*
* @param Config $config
* @param boolean $cdnftp
* @return string|null
*/
static public function canonical_generated_by( $config, $cdnftp = false ) {
if ( !self::_should_canonical_be_generated( $config, $cdnftp ) )
return null;
if ( Util_Environment::is_nginx() ) {
// in nginx - browsercache generates canonical if its enabled,
// since it does not allow multiple location tags
if ( $config->get_boolean( 'browsercache.enabled' ) )
return 'browsercache';
}
if ( $config->get_boolean( 'cdn.enabled' ) )
return 'cdn';
return null;
}
/**
* Basic check if canonical generation should be done
*
* @param Config $config
* @param boolean $cdnftp
* @return bool
*/
static private function _should_canonical_be_generated( $config, $cdnftp ) {
if ( !$config->get_boolean( 'cdn.canonical_header' ) )
return false;
$cdncommon = Dispatcher::component( 'Cdn_Core' );
$cdn = $cdncommon->get_cdn();
return ( ( $config->get_string( 'cdn.engine' ) != 'ftp' || $cdnftp ) &&
$cdn->headers_support() == W3TC_CDN_HEADER_MIRRORING );
}
/**
* If BrowserCache should generate rules specific for CDN. Used with CDN FTP
*
* @param Config $config
* @return boolean;
*/
static public function should_browsercache_generate_rules_for_cdn( $config ) {
if ( $config->get_boolean( 'cdn.enabled' ) &&
$config->get_string( 'cdn.engine' ) == 'ftp' ) {
$cdncommon = Dispatcher::component( 'Cdn_Core' );
$cdn = $cdncommon->get_cdn();
$domain = $cdn->get_domain();
if ( $domain )
return true;
}
return false;
}
/**
* Returns the domain used with the cdn.
*
* @param string
* @return string
*/
static public function get_cdn_domain( $path = '' ) {
$cdncommon = Dispatcher::component( 'Cdn_Core' );
$cdn = $cdncommon->get_cdn();
return $cdn->get_domain( $path );
}
/**
* Usage statistics uses one of other module's cache
* to store its temporary data
*/
static public function get_usage_statistics_cache() {
static $cache = null;
if ( is_null( $cache ) ) {
$c = Dispatcher::config();
if ( $c->get_boolean( 'objectcache.enabled' ) )
$provider = Dispatcher::component( 'ObjectCache_WpObjectCache_Regular' );
else if ( $c->get_boolean( 'dbcache.enabled' ) )
$provider = Dispatcher::component( 'DbCache_Core' );
else if ( $c->get_boolean( 'pgcache.enabled' ) )
$provider = Dispatcher::component( 'PgCache_ContentGrabber' );
else if ( $c->get_boolean( 'minify.enabled' ) )
$provider = Dispatcher::component( 'Minify_Core' );
else
return null;
$engineConfig = $provider->get_usage_statistics_cache_config();
$engineConfig['module'] = 'stats';
$engineConfig['blog_id'] = 0; // count wpmu-wide stats
if ( $engineConfig['engine'] == 'file' ) {
$engineConfig['cache_dir'] = Util_Environment::cache_dir( 'stats' );
}
$cache = Cache::instance( $engineConfig['engine'],
$engineConfig );
}
return $cache;
}
/**
* In a case request processing has been finished before WP initialized,
* but usage statistics metrics should be counted.
* To work properly $metrics_function has to be added also by plugin
* when add_action is available.
*/
static public function usage_statistics_apply_before_init_and_exit(
$metrics_function ) {
$c = Dispatcher::config();
if ( !$c->get_boolean( 'stats.enabled' ) )
exit();
$core = Dispatcher::component( 'UsageStatistics_Core' );
$core->apply_metrics_before_init_and_exit( $metrics_function );
}
}