Ticket #14348: 14348-7.diff

wordpress/wp-includes/default-filters.php

@@ -282 +282 @@
 add_action( 'admin_init', 'register_admin_color_schemes', 1);
 add_action( 'admin_color_scheme_picker', 'admin_color_scheme_picker' );
 
+// Quit early on HEAD requests
+add_action( 'head_request', 'handle_head_request' );
+
 unset($filter, $action);

wordpress/wp-includes/functions.php

@@ -3607 +3607 @@
         return true;
 }
 
+/**
+ * Halt template load for HEAD requests. Performance bump by eliminating output
+ * 
+ * @since 3.5.0
+ */
+function handle_head_request() {        
+        if ( 'HEAD' === $_SERVER['REQUEST_METHOD'] && apply_filters( 'exit_on_http_head', true ) ) {
+                $function = create_function( '', "return '_scalar_wp_die_handler';" );
+                add_filter( 'wp_die_handler', $function );
+                wp_die();
+        }
+}

wordpress/wp-includes/template-loader.php

@@ -6 +6 @@
 if ( defined('WP_USE_THEMES') && WP_USE_THEMES )
         do_action('template_redirect');
 
+/**
+ * Halt template load for HEAD requests. Performance bump by eliminating output
+ *
+ * @since 3.5.0
+ */
+do_action( 'head_request' );
+
 // Process feeds and trackbacks even if not using themes.
 if ( is_robots() ) :
         do_action('do_robots');