Administration: In admin-ajax.php, send X-Robots-Tag header earlier, so that it applies before wp_die() when no action parameter was provided.

SergeyBiryukov · SergeyBiryukov · commit ceeb99ecbccf · 2019-07-17T01:10:59.000Z
Props robi-bobi, harryfear, garrett-eclipse. Fixes #47711. git-svn-id: https://develop.svn.wordpress.org/trunk@45650 602fd350-edb4-49c9-b593-d223f7449a82
diff --git a/src/wp-admin/admin-ajax.php b/src/wp-admin/admin-ajax.php
@@ -24,6 +24,9 @@
 /** Allow for cross-domain requests (from the front end). */
 send_origin_headers();
 
+header( 'Content-Type: text/html; charset=' . get_option( 'blog_charset' ) );
+header( 'X-Robots-Tag: noindex' );
+
 // Require an action parameter
 if ( empty( $_REQUEST['action'] ) ) {
 	wp_die( '0', 400 );
@@ -35,9 +38,6 @@
 /** Load Ajax Handlers for WordPress Core */
 require_once( ABSPATH . 'wp-admin/includes/ajax-actions.php' );
 
-header( 'Content-Type: text/html; charset=' . get_option( 'blog_charset' ) );
-header( 'X-Robots-Tag: noindex' );
-
 send_nosniff_header();
 nocache_headers();
 
