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Cdn_Plugin.php
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<?php
/**
* File: Cdn_Plugin.php
*
* @package W3TC
*/
namespace W3TC;
/**
* Class: Cdn_Plugin
*
* phpcs:disable PSR2.Classes.PropertyDeclaration.Underscore
* phpcs:disable PSR2.Methods.MethodDeclaration.Underscore
*/
class Cdn_Plugin {
/**
* Reject reason.
*
* @var string
*/
private $cdn_reject_reason = '';
/**
* Config.
*
* @var Config
*/
private $_config = null;
/**
* Debug flag.
*
* @var bool
*/
private $_debug = false;
/**
* Attachements action.
*
* @var array
*/
private $_attachments_action = array();
/**
* Constructor for initializing CDN plugin configuration and debug flag.
*
* @return void
*/
public function __construct() {
$this->_config = Dispatcher::config();
$this->_debug = $this->_config->get_boolean( 'cdn.debug' );
}
/**
* Runs the CDN plugin by setting up necessary hooks and actions.
*
* @return void
*/
public function run() {
$cdn_engine = $this->_config->get_string( 'cdn.engine' );
add_filter( 'cron_schedules', array( $this, 'cron_schedules' ) ); // phpcs:ignore WordPress.WP.CronInterval.ChangeDetected
add_filter( 'w3tc_footer_comment', array( $this, 'w3tc_footer_comment' ) );
if ( ! Cdn_Util::is_engine_mirror( $cdn_engine ) ) {
add_action( 'w3_cdn_cron_queue_process', array( $this, 'cron_queue_process' ) );
add_action( 'w3_cdn_cron_upload', array( $this, 'cron_upload' ) );
add_action( 'switch_theme', array( $this, 'switch_theme' ) );
add_filter( 'update_feedback', array( $this, 'update_feedback' ) );
}
$default_override = Cdn_Util::get_flush_manually_default_override( $cdn_engine );
$flush_on_actions = ! $this->_config->get_boolean( 'cdn.flush_manually', $default_override );
if ( $flush_on_actions ) {
add_action( 'delete_attachment', array( $this, 'delete_attachment' ) );
add_filter( 'wp_insert_attachment_data', array( $this, 'check_inserting_new_attachment' ), 10, 2 );
add_filter( 'update_attached_file', array( $this, 'update_attached_file' ) );
add_filter( 'wp_update_attachment_metadata', array( $this, 'update_attachment_metadata' ) );
}
add_filter( 'w3tc_preflush_cdn_all', array( $this, 'w3tc_preflush_cdn_all' ), 10, 2 );
add_filter( 'w3tc_admin_bar_menu', array( $this, 'w3tc_admin_bar_menu' ) );
if ( is_admin() ) {
add_filter( 'w3tc_module_is_running-cdn', array( $this, 'cdn_is_running' ) );
}
if ( ! is_admin() || $this->_config->get_boolean( 'cdn.admin.media_library' ) ) {
add_filter( 'wp_prepare_attachment_for_js', array( $this, 'wp_prepare_attachment_for_js' ), 0 );
}
// Start rewrite engine.
if ( $this->can_cdn() ) {
Util_Bus::add_ob_callback( 'cdn', array( $this, 'ob_callback' ) );
}
if ( is_admin() && Cdn_Util::can_purge( $cdn_engine ) ) {
add_filter( 'media_row_actions', array( $this, 'media_row_actions' ), 0, 2 );
}
add_filter( 'w3tc_minify_http2_preload_url', array( $this, 'w3tc_minify_http2_preload_url' ), 3000 );
}
/**
* Retrieves the admin component for the CDN plugin.
*
* @return Cdn_Core_Admin Admin component of the CDN plugin.
*/
public function get_admin() {
return Dispatcher::component( 'Cdn_Core_Admin' );
}
/**
* Processes the CDN queue via cron.
*
* @return int The number of items successfully processed.
*/
public function cron_queue_process() {
$queue_limit = $this->_config->get_integer( 'cdn.queue.limit' );
return $this->get_admin()->queue_process( $queue_limit );
}
/**
* Uploads files to the CDN via cron.
*
* @return void
*/
public function cron_upload() {
$files = $this->get_files();
$upload = array();
$results = array();
$common = Dispatcher::component( 'Cdn_Core' );
foreach ( $files as $file ) {
$local_path = $common->docroot_filename_to_absolute_path( $file );
$remote_path = $common->uri_to_cdn_uri( $common->docroot_filename_to_uri( $file ) );
$upload[] = $common->build_file_descriptor( $local_path, $remote_path );
}
$common->upload( $upload, true, $results );
}
/**
* Handles the insertion of new attachments by tracking their action (insert or update).
*
* @param array $data Attachment data.
* @param array $postarr Post data for the attachment.
*
* @return array Modified attachment data.
*/
public function check_inserting_new_attachment( $data, $postarr ) {
$this->_attachments_action[ $postarr['file'] ] = empty( $postarr['ID'] ) ? 'insert' : 'update';
return $data;
}
/**
* Preflushes CDN files based on user settings.
*
* @param bool $do_flush Whether or not to flush the CDN.
* @param array $extras Extra parameters.
*
* @return bool Whether or not the flush should occur.
*/
public function w3tc_preflush_cdn_all( $do_flush, $extras = array() ) {
$default_override = Cdn_Util::get_flush_manually_default_override( $this->_config->get_string( 'cdn.engine' ) );
if ( $this->_config->get_boolean( 'cdn.flush_manually', $default_override ) ) {
if ( ! isset( $extras['ui_action'] ) ) {
$do_flush = false;
}
}
return $do_flush;
}
/**
* Updates the attached file on the CDN.
*
* @param string $attached_file The attached file path.
*
* @return string The attached file path after potential modifications.
*/
public function update_attached_file( $attached_file ) {
$common = Dispatcher::component( 'Cdn_Core' );
$files = $common->get_files_for_upload( $attached_file );
$files = apply_filters( 'w3tc_cdn_update_attachment', $files );
$results = array();
$cdn_engine = $this->_config->get_string( 'cdn.engine' );
if ( Cdn_Util::is_engine_mirror( $cdn_engine ) ) {
if ( ! array_key_exists( $attached_file, $this->_attachments_action ) || 'update' === $this->_attachments_action[ $attached_file ] ) {
$common->purge( $files, $results );
}
} else {
$common->upload( $files, true, $results );
}
return $attached_file;
}
/**
* Deletes the attachment from the CDN when it is deleted from WordPress.
*
* @param int $attachment_id The ID of the attachment to delete.
*
* @return void
*/
public function delete_attachment( $attachment_id ) {
$common = Dispatcher::component( 'Cdn_Core' );
$files = $common->get_attachment_files( $attachment_id );
$files = apply_filters( 'w3tc_cdn_delete_attachment', $files );
$results = array();
$cdn_engine = $this->_config->get_string( 'cdn.engine' );
if ( Cdn_Util::is_engine_mirror( $cdn_engine ) ) {
$common->purge( $files, $results );
} else {
$common->delete( $files, true, $results );
}
}
/**
* Updates attachment metadata on the CDN.
*
* @param array $metadata The attachment metadata.
*
* @return array The updated attachment metadata.
*/
public function update_attachment_metadata( $metadata ) {
$common = Dispatcher::component( 'Cdn_Core' );
$files = $common->get_metadata_files( $metadata );
$files = apply_filters( 'w3tc_cdn_update_attachment_metadata', $files );
$results = array();
$cdn_engine = $this->_config->get_string( 'cdn.engine' );
if ( Cdn_Util::is_engine_mirror( $cdn_engine ) ) {
if ( $this->_config->get_boolean( 'cdn.uploads.enable' ) ) {
$common->purge( $files, $results );
}
} else {
$common->upload( $files, true, $results );
}
return $metadata;
}
/**
* Adds custom cron schedules for CDN tasks.
*
* @param array $schedules The existing cron schedules.
*
* @return array Modified cron schedules.
*/
public function cron_schedules( $schedules ) {
$c = $this->_config;
if ( $c->get_boolean( 'cdn.enabled' ) && ! Cdn_Util::is_engine_mirror( $c->get_string( 'cdn.engine' ) ) ) {
$queue_interval = $c->get_integer( 'cdn.queue.interval' );
$schedules['w3_cdn_cron_queue_process'] = array(
'interval' => $queue_interval,
'display' => sprintf(
// translators: 1 queue interval value.
__(
'[W3TC] CDN queue process (every %1$d seconds)',
'w3-total-cache'
),
$queue_interval
),
);
}
if ( $c->get_boolean( 'cdn.enabled' ) &&
$c->get_boolean( 'cdn.autoupload.enabled' ) &&
! Cdn_Util::is_engine_mirror( $c->get_string( 'cdn.engine' ) ) ) {
$autoupload_interval = $c->get_integer( 'cdn.autoupload.interval' );
$schedules['w3_cdn_cron_upload'] = array(
'interval' => $autoupload_interval,
'display' => sprintf(
// translators: 1 queue interval value.
__(
'[W3TC] CDN auto upload (every %1$d seconds)',
'w3-total-cache'
),
$autoupload_interval
),
);
}
return $schedules;
}
/**
* Handles actions when the theme is switched.
*
* @return void
*/
public function switch_theme() {
$state = Dispatcher::config_state();
$state->set( 'cdn.show_note_theme_changed', true );
$state->save();
}
/**
* Handles the feedback message for database upgrades.
*
* @param string $message The feedback message to handle.
*
* @return void
*/
public function update_feedback( $message ) {
if ( 'Upgrading database' === $message ) {
$state = Dispatcher::config_state();
$state->set( 'cdn.show_note_wp_upgraded', true );
$state->save();
}
}
/**
* Callback function for output buffering to process the buffer content.
*
* @param string $buffer The content to be processed.
*
* @return string The processed buffer content.
*/
public function ob_callback( $buffer ) {
if ( '' !== $buffer && Util_Content::is_html_xml( $buffer ) ) {
if ( $this->can_cdn2( $buffer ) ) {
$srcset_helper = new _Cdn_Plugin_ContentFilter();
$buffer = $srcset_helper->replace_all_links( $buffer );
if ( $this->_debug ) {
$replaced_urls = $srcset_helper->get_replaced_urls();
$buffer = $this->w3tc_footer_comment_after( $buffer, $replaced_urls );
}
}
}
return $buffer;
}
/**
* Retrieves an array of files to be processed based on configuration settings.
*
* @return array List of files to be processed.
*/
public function get_files() {
$files = array();
if ( $this->_config->get_boolean( 'cdn.includes.enable' ) ) {
$files = array_merge( $files, $this->get_files_includes() );
}
if ( $this->_config->get_boolean( 'cdn.theme.enable' ) ) {
$files = array_merge( $files, $this->get_files_theme() );
}
if ( $this->_config->get_boolean( 'cdn.minify.enable' ) ) {
$files = array_merge( $files, $this->get_files_minify() );
}
if ( $this->_config->get_boolean( 'cdn.custom.enable' ) ) {
$files = array_merge( $files, $this->get_files_custom() );
}
return $files;
}
/**
* Retrieves an array of files from the includes directory to be processed.
*
* @return array List of files from the includes directory.
*/
public function get_files_includes() {
$includes_root = Util_Environment::normalize_path( ABSPATH . WPINC );
$doc_root = Util_Environment::normalize_path( Util_Environment::document_root() );
$includes_path = ltrim( str_replace( $doc_root, '', $includes_root ), '/' );
$files = Cdn_Util::search_files(
$includes_root,
$includes_path,
$this->_config->get_string( 'cdn.includes.files' )
);
return $files;
}
/**
* Retrieves an array of files from the theme directory to be processed.
*
* @return array List of theme files to be processed.
*/
public function get_files_theme() {
// If mobile or referrer support enabled we should upload whole themes directory.
if ( $this->_config->get_boolean( 'mobile.enabled' ) || $this->_config->get_boolean( 'referrer.enabled' ) ) {
$themes_root = get_theme_root();
} else {
$themes_root = get_stylesheet_directory();
}
$themes_root = Util_Environment::normalize_path( $themes_root );
$themes_path = ltrim( str_replace( Util_Environment::normalize_path( Util_Environment::document_root() ), '', $themes_root ), '/' );
$files = Cdn_Util::search_files(
$themes_root,
$themes_path,
$this->_config->get_string( 'cdn.theme.files' )
);
return $files;
}
/**
* Retrieves an array of minified files to be processed.
*
* @return array List of minified files to be processed.
*/
public function get_files_minify() {
$files = array();
if ( $this->_config->get_boolean( 'minify.rewrite' ) &&
Util_Rule::can_check_rules() &&
(
! $this->_config->get_boolean( 'minify.auto' ) ||
Cdn_Util::is_engine_mirror( $this->_config->get_string( 'cdn.engine' ) )
) ) {
$minify = Dispatcher::component( 'Minify_Plugin' );
$document_root = Util_Environment::normalize_path( Util_Environment::document_root() );
$minify_root = Util_Environment::normalize_path( Util_Environment::cache_blog_dir( 'minify' ) );
$minify_path = ltrim( str_replace( $document_root, '', $minify_root ), '/' );
$urls = $minify->get_urls();
// In WPMU + network admin (this code used for minify manual only)
// common minify files are stored under context of main blog (i.e. 1)
// but have urls of 0 blog, so download has to be used.
if ( 'file' === $this->_config->get_string( 'minify.engine' ) && ! ( Util_Environment::is_wpmu() && is_network_admin() ) ) {
foreach ( $urls as $url ) {
Util_Http::get( $url );
}
$files = Cdn_Util::search_files(
$minify_root,
$minify_path,
'*.css;*.js'
);
} else {
foreach ( $urls as $url ) {
$file = Util_Environment::normalize_file_minify( $url );
if ( ! Util_Environment::is_url( $file ) ) {
$file = $document_root . '/' . $file;
$file = ltrim( str_replace( $minify_root, '', $file ), '/' );
$dir = dirname( $file );
if ( $dir ) {
Util_File::mkdir( $dir, 0777, $minify_root );
}
if ( Util_Http::download( $url, $minify_root . '/' . $file ) !== false ) {
$files[] = $minify_path . '/' . $file;
}
}
}
}
}
return $files;
}
/**
* Retrieves an array of custom files to be processed based on configuration settings.
*
* @return array List of custom files to be processed.
*/
public function get_files_custom() {
$files = array();
$document_root = Util_Environment::normalize_path( Util_Environment::document_root() );
$custom_files = $this->_config->get_array( 'cdn.custom.files' );
$custom_files = array_map( array( '\W3TC\Util_Environment', 'parse_path' ), $custom_files );
$site_root = Util_Environment::normalize_path( Util_Environment::site_root() );
$path = Util_Environment::site_url_uri();
$site_root_dir = str_replace( $document_root, '', $site_root );
if ( strstr( WP_CONTENT_DIR, Util_Environment::site_root() ) === false ) {
$site_root = Util_Environment::normalize_path( Util_Environment::document_root() );
$path = '';
}
$content_path = trim( str_replace( WP_CONTENT_DIR, '', $site_root ), '/\\' );
foreach ( $custom_files as $custom_file ) {
if ( '' !== $custom_file ) {
$custom_file = Cdn_Util::replace_folder_placeholders( $custom_file );
$custom_file = Util_Environment::normalize_file( $custom_file );
$dir = trim( dirname( $custom_file ), '/\\' );
$rel_path = $dir;
if ( strpos( $dir, '<currentblog>' ) !== false ) {
$dir = str_replace( '<currentblog>', 'blogs.dir/' . Util_Environment::blog_id(), $dir );
$rel_path = $dir;
}
if ( '.' === $dir ) {
$dir = '';
$rel_path = $dir;
}
$mask = basename( $custom_file );
$files = array_merge(
$files,
Cdn_Util::search_files(
$document_root . '/' . $dir,
$rel_path,
$mask
)
);
}
}
return $files;
}
/**
* Checks whether CDN can be applied based on various conditions such as admin access,
* user agent, request URI, and SSL settings.
*
* @return bool True if CDN can be applied, false otherwise.
*/
public function can_cdn() {
// Skip if admin.
if ( defined( 'WP_ADMIN' ) ) {
$this->cdn_reject_reason = esc_html__( 'wp-admin', 'w3-total-cache' );
return false;
}
// Check for WPMU's and WP's 3.0 short init.
if ( defined( 'SHORTINIT' ) && SHORTINIT ) {
$this->cdn_reject_reason = esc_html__( 'Short init', 'w3-total-cache' );
return false;
}
// Check User agent.
if ( ! $this->check_ua() ) {
$this->cdn_reject_reason = esc_html__( 'user agent is rejected', 'w3-total-cache' );
return false;
}
// Check request URI.
if ( ! $this->_check_request_uri() ) {
$this->cdn_reject_reason = esc_html__( 'request URI is rejected', 'w3-total-cache' );
return false;
}
// Do not replace urls if SSL and SSL support is do not replace.
if ( Util_Environment::is_https() && $this->_config->get_boolean( 'cdn.reject.ssl' ) ) {
$this->cdn_reject_reason = esc_html__( 'SSL is rejected', 'w3-total-cache' );
return false;
}
return true;
}
/**
* Determines whether CDN processing is allowed based on various conditions.
*
* Checks for the presence of the DONOTCDN constant, user roles, and request URI conditions.
*
* @param string $buffer The content buffer to be processed.
*
* @return bool True if CDN is allowed, false otherwise.
*/
public function can_cdn2( $buffer ) {
// Check for DONOTCDN constant.
if ( defined( 'DONOTCDN' ) && DONOTCDN ) {
$this->cdn_reject_reason = esc_html__( 'DONOTCDN constant is defined', 'w3-total-cache' );
return false;
}
// Check logged users roles.
if ( $this->_config->get_boolean( 'cdn.reject.logged_roles' ) && ! $this->_check_logged_in_role_allowed() ) {
$this->cdn_reject_reason = esc_html__( 'logged in role is rejected', 'w3-total-cache' );
return false;
}
return true;
}
/**
* Checks the User-Agent (UA) for any rejection conditions based on configuration.
*
* @return bool True if the User-Agent is allowed, false if rejected.
*/
public function check_ua() {
$uas = array_merge(
$this->_config->get_array( 'cdn.reject.ua' ),
array( W3TC_POWERED_BY )
);
foreach ( $uas as $ua ) {
if ( ! empty( $ua ) ) {
if ( isset( $_SERVER['HTTP_USER_AGENT'] ) && stristr( sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ), $ua ) !== false ) {
return false;
}
}
}
return true;
}
/**
* Checks the request URI for any patterns that should reject the request.
*
* Evaluates if the current request URI matches any configured rejection patterns.
*
* @return bool True if the request URI is allowed, false otherwise.
*/
public function _check_request_uri() {
$reject_uri = $this->_config->get_array( 'cdn.reject.uri' );
$reject_uri = array_map( array( '\W3TC\Util_Environment', 'parse_path' ), $reject_uri );
foreach ( $reject_uri as $expr ) {
$expr = trim( $expr );
$expr = str_replace( '~', '\~', $expr );
if ( '' !== $expr && preg_match( '~' . $expr . '~i', isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : '' ) ) {
return false;
}
}
if ( Util_Request::get_string( 'wp_customize' ) ) {
return false;
}
return true;
}
/**
* Checks if the current logged-in user's role is allowed to bypass CDN restrictions.
*
* Verifies whether the logged-in user’s role is listed in the rejection roles configuration.
*
* @return bool True if the user's role is allowed, false otherwise.
*/
private function _check_logged_in_role_allowed() {
$current_user = wp_get_current_user();
if ( ! is_user_logged_in() ) {
return true;
}
$roles = $this->_config->get_array( 'cdn.reject.roles' );
if ( empty( $roles ) || empty( $current_user->roles ) || ! is_array( $current_user->roles ) ) {
return true;
}
foreach ( $current_user->roles as $role ) {
if ( in_array( $role, $roles, true ) ) {
return false;
}
}
return true;
}
/**
* Filters the media row actions for the admin dashboard.
*
* Allows the modification of actions related to media items.
*
* @param array $actions The list of available actions for the media item.
* @param WP_Post $post The post object representing the media item.
*
* @return array The modified list of actions.
*/
public function media_row_actions( $actions, $post ) {
return $this->get_admin()->media_row_actions( $actions, $post );
}
/**
* Determines if the CDN system is currently running.
*
* Checks the current status of the CDN system.
*
* @param bool $current_state The current state of the CDN system.
*
* @return bool True if the CDN system is running, false otherwise.
*/
public function cdn_is_running( $current_state ) {
$admin = $this->get_admin();
return $admin->is_running();
}
/**
* Changes the canonical header for the current request.
*
* Modifies the canonical header for the page, if necessary.
*
* @return void
*/
public function change_canonical_header() {
$admin = $this->get_admin();
$admin->change_canonical_header();
}
/**
* Prepares attachment data for JavaScript use, modifying URLs if necessary.
*
* Modifies the URLs of attachments to point to the appropriate CDN locations.
*
* @param array $response The attachment data.
*
* @return array The modified attachment data.
*/
public function wp_prepare_attachment_for_js( $response ) {
$response['url'] = $this->wp_prepare_attachment_for_js_url( $response['url'] );
$response['link'] = $this->wp_prepare_attachment_for_js_url( $response['link'] );
if ( ! empty( $response['sizes'] ) ) {
foreach ( $response['sizes'] as $size => &$data ) {
$data['url'] = $this->wp_prepare_attachment_for_js_url( $data['url'] );
}
}
return $response;
}
/**
* Prepares a URL for use in JavaScript, modifying it if necessary.
*
* @param string $url The original URL.
*
* @return string The potentially modified URL.
*/
private function wp_prepare_attachment_for_js_url( $url ) {
$url = trim( $url );
if ( ! empty( $url ) ) {
$parsed = wp_parse_url( $url );
$uri = ( isset( $parsed['path'] ) ? $parsed['path'] : '/' ) .
( isset( $parsed['query'] ) ? '?' . $parsed['query'] : '' );
$wp_upload_dir = wp_upload_dir();
$upload_base_url = $wp_upload_dir['baseurl'];
if ( substr( $url, 0, strlen( $upload_base_url ) ) === $upload_base_url ) {
$common = Dispatcher::component( 'Cdn_Core' );
$new_url = $common->url_to_cdn_url( $url, $uri );
if ( ! is_null( $new_url ) ) {
$url = $new_url;
}
}
}
return $url;
}
/**
* Prepares a URL for HTTP2 preload by modifying it to point to the CDN.
*
* Modifies the result link to point to the CDN URL for HTTP2 preload.
*
* @param array $data The data containing the result link.
*
* @return array The modified data with the CDN URL.
*/
public function w3tc_minify_http2_preload_url( $data ) {
$url = $data['result_link'];
$url = trim( $url );
if ( empty( $url ) ) {
return $data;
}
$parsed = wp_parse_url( $url );
$uri = ( isset( $parsed['path'] ) ? $parsed['path'] : '/' ) .
( isset( $parsed['query'] ) ? '?' . $parsed['query'] : '' );
$common = Dispatcher::component( 'Cdn_Core' );
$new_url = $common->url_to_cdn_url( $url, $uri );
if ( is_null( $new_url ) ) {
return $data;
}
$data['result_link'] = $new_url;
// url_to_cdn_url processed by browsercache internally.
$data['browsercache_processed'] = '*';
return $data;
}
/**
* Adds CDN-related items to the WordPress admin bar menu.
*
* Modifies the admin bar menu to include CDN cache options if applicable.
*
* @param array $menu_items The current admin bar menu items.
*
* @return array The modified admin bar menu items.
*/
public function w3tc_admin_bar_menu( $menu_items ) {
$cdn_engine = $this->_config->get_string( 'cdn.engine' );
if ( Cdn_Util::can_purge_all( $cdn_engine ) ) {
$menu_items['20710.cdn'] = array(
'id' => 'w3tc_cdn_flush_all',
'parent' => 'w3tc_flush',
'title' => __( 'CDN Cache', 'w3-total-cache' ),
'href' => wp_nonce_url( admin_url( 'admin.php?page=w3tc_cdn&w3tc_flush_cdn' ), 'w3tc' ),
);
}
if ( Cdn_Util::can_purge( $cdn_engine ) ) {
$menu_items['20790.cdn'] = array(
'id' => 'w3tc_cdn_flush',
'parent' => 'w3tc_flush',
'title' => __( 'CDN: Manual Purge', 'w3-total-cache' ),
'href' => wp_nonce_url( admin_url( 'admin.php?page=w3tc_cdn&w3tc_cdn_purge' ), 'w3tc' ),
'meta' => array( 'onclick' => 'w3tc_popupadmin_bar(this.href); return false' ),
);
}
return $menu_items;
}
/**
* Appends a footer comment to indicate the CDN engine and rejection reason.
*
* Adds details about the CDN engine and any rejection reasons to the footer comment.
*
* @param array $strings The current strings to be included in the footer comment.
*
* @return array The modified footer comment strings.
*/
public function w3tc_footer_comment( $strings ) {
$common = Dispatcher::component( 'Cdn_Core' );
$cdn = $common->get_cdn();
$via = $cdn->get_via();
$strings[] = sprintf(
// translators: 1 CDN engine name, 2 rejection reason.
__(
'Content Delivery Network via %1$s%2$s',
'w3-total-cache'
),
( $via ? $via : 'N/A' ),
( empty( $this->cdn_reject_reason ) ? '' : sprintf( ' (%s)', $this->cdn_reject_reason ) )
);
if ( $this->_debug ) {
$strings[] = '{w3tc_cdn_debug_info}';
}
return $strings;
}
/**
* Appends debug information about replaced URLs for CDN to the footer.
*
* Adds debug information about replaced URLs to the footer comment.
*
* @param string $buffer The content buffer being processed.
* @param array $replaced_urls The array of replaced URLs.
*
* @return string The modified content buffer with the appended debug information.
*/
public function w3tc_footer_comment_after( $buffer, $replaced_urls ) {
$strings = array();
if ( is_array( $replaced_urls ) && count( $replaced_urls ) ) {
$strings[] = __( 'Replaced URLs for CDN:', 'w3-total-cache' );
foreach ( $replaced_urls as $old_url => $new_url ) {
$strings[] = sprintf(
'%1$s => %2$s',
Util_Content::escape_comment( $old_url ),
Util_Content::escape_comment( $new_url )
);
}
$strings[] = '';
}
$buffer = str_replace( '{w3tc_cdn_debug_info}', implode( "\n", $strings ), $buffer );
return $buffer;
}
}
/**
* Class: _Cdn_Plugin_ContentFilter
*
* phpcs:disable PSR2.Classes.PropertyDeclaration.Underscore
* phpcs:disable PSR2.Methods.MethodDeclaration.Underscore
*/
class _Cdn_Plugin_ContentFilter { // phpcs:ignore Generic.Classes.OpeningBraceSameLine.ContentAfterBrace, PEAR.NamingConventions.ValidClassName.StartWithCapital, Generic.Files.OneObjectStructurePerFile.MultipleFound
/**
* Regular expressions.
*
* @var array
*/
private $_regexps = array();
/**
* Placeholders.
*
* @var array
*/
private $_placeholders = array();
/**
* Config.
*
* @var Config
*/
private $_config;
/**
* Replaced URLs.
*
* @var array
*/
private $_replaced_urls = array();
/**
* If background uploading already scheduled
*
* @var boolean
*/
private static $_upload_scheduled = false;
/**
* Initializes the CDN plugin with configuration from the Dispatcher.
*
* @return void
*/
public function __construct() {
$this->_config = Dispatcher::config();
}
/**
* Replaces all links in the given buffer with appropriate CDN URLs.
*
* @param string $buffer The content to process and replace URLs in.
*
* @return string The modified content with replaced links.
*/
public function replace_all_links( $buffer ) {
$this->fill_regexps();
$srcset_pattern = '~srcset\s*=\s*[\"\'](.*?)[\"\']~s';
$buffer = preg_replace_callback(
$srcset_pattern,
array( $this, '_srcset_replace_callback' ),
$buffer
);
foreach ( $this->_regexps as $regexp ) {
$buffer = preg_replace_callback(
$regexp,
array( $this, '_link_replace_callback' ),
$buffer
);
}
if ( $this->_config->get_boolean( 'cdn.minify.enable' ) ) {
if ( $this->_config->get_boolean( 'minify.auto' ) ) {
$minify_url_regexp = $this->minify_url_regexp( '/[a-zA-Z0-9-_]+\.(css|js)' );
if ( Cdn_Util::is_engine_mirror( $this->_config->get_string( 'cdn.engine' ) ) ) {
$processor = array( $this, '_link_replace_callback' );
} else {
$processor = array( $this, '_minify_auto_pushcdn_link_replace_callback' );
}
} else {
$minify_url_regexp = $this->minify_url_regexp( '/[a-z0-9]+\..+\.include(-(footer|body))?(-nb)?\.[a-f0-9]+\.(css|js)' );
$processor = array( $this, '_link_replace_callback' );
}
if ( ! empty( $minify_url_regexp ) ) {