Fixes #8177. XHR transport now considers 304 Not Modified responses as 200 OK if...

diff --git a/src/ajax/xhr.js b/src/ajax/xhr.js
index 91a71de..b18274c 100644 (file)
--- a/src/ajax/xhr.js
+++ b/src/ajax/xhr.js
@@ -178,6 +178,12 @@ if ( jQuery.support.ajax ) {
                                                                        // IE - #1450: sometimes returns 1223 when it should be 204
                                                                        if ( status === 1223 ) {
                                                                                status = 204;
                                                                        // IE - #1450: sometimes returns 1223 when it should be 204
                                                                        if ( status === 1223 ) {
                                                                                status = 204;

+                                                                       // Various - #8177: a Not Modified response was received
+                                                                       // yet no conditional request headers was provided
+                                                                       } else if ( status === 304 &&
+                                                                                               !headers[ "if-modified-since" ] &&
+                                                                                               !headers[ "if-none-match" ] ) {
+                                                                               status = 200;

                                                                        // Status 0 encompasses several cases
                                                                        } else if ( !status ) {
                                                                                // Cross-domain
                                                                        // Status 0 encompasses several cases
                                                                        } else if ( !status ) {
                                                                                // Cross-domain