Wordpress 4.5.3-scripts

[autoinstalls/wordpress.git] / wp-admin / load-scripts.php

diff --git a/wp-admin/load-scripts.php b/wp-admin/load-scripts.php
index 4c7d40ed61ade248c74f4bfc85f1c09b3f60c4a1..011ae3c890796ac310ed7c2c0a091e5a3905b0b2 100644 (file)
--- a/wp-admin/load-scripts.php
+++ b/wp-admin/load-scripts.php
@@ -33,6 +33,15 @@ $out = '';
 $wp_scripts = new WP_Scripts();
 wp_default_scripts($wp_scripts);
 
+if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) && stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] ) === $wp_version ) {
+       $protocol = $_SERVER['SERVER_PROTOCOL'];
+       if ( ! in_array( $protocol, array( 'HTTP/1.1', 'HTTP/2', 'HTTP/2.0' ) ) ) {
+               $protocol = 'HTTP/1.0';
+       }
+       header( "$protocol 304 Not Modified" );
+       exit();
+}
+
 foreach ( $load as $handle ) {
        if ( !array_key_exists($handle, $wp_scripts->registered) )
                continue;
@@ -41,6 +50,7 @@ foreach ( $load as $handle ) {
        $out .= get_file($path) . "\n";
 }
 
+header("Etag: $wp_version");
 header('Content-Type: application/javascript; charset=UTF-8');
 header('Expires: ' . gmdate( "D, d M Y H:i:s", time() + $expires_offset ) . ' GMT');
 header("Cache-Control: public, max-age=$expires_offset");