REST API: Ensure no-cache headers are sent when methods are ovverriden.

Props tykoted, xknown, ehtis, timothyblynjacobs, peterwilsoncc, rmccue, jorbin.


git-svn-id: https://develop.svn.wordpress.org/trunk@56834 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/rest-api.php

@@ -1090,6 +1090,7 @@ function rest_cookie_check_errors( $result ) {
 	$result = wp_verify_nonce( $nonce, 'wp_rest' );
 
 	if ( ! $result ) {
+		add_filter( 'rest_send_nocache_headers', '__return_true', 20 );
 		return new WP_Error( 'rest_cookie_invalid_nonce', __( 'Cookie check failed' ), array( 'status' => 403 ) );
 	}