X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/138998bbd8f7a1ac38b2f1eacbdf7cd522be4b13..b22765f41bf0b2021b9beb9120ee0ac91fa89292:/wp-admin/load-scripts.php

diff --git a/wp-admin/load-scripts.php b/wp-admin/load-scripts.php
index 4c7d40ed..d536c192 100644
--- a/wp-admin/load-scripts.php
+++ b/wp-admin/load-scripts.php
@@ -8,7 +8,10 @@
 error_reporting(0);
 
 /** Set ABSPATH for execution */
-define( 'ABSPATH', dirname(dirname(__FILE__)) . '/' );
+if ( ! defined( 'ABSPATH' ) ) {
+	define( 'ABSPATH', dirname( dirname( __FILE__ ) ) . '/' );
+}
+
 define( 'WPINC', 'wp-includes' );
 
 $load = $_GET['load'];
@@ -33,6 +36,15 @@ $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 +53,7 @@ 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");