diff options
| -rw-r--r-- | server/src/com/vaadin/server/communication/HeartbeatHandler.java | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/server/src/com/vaadin/server/communication/HeartbeatHandler.java b/server/src/com/vaadin/server/communication/HeartbeatHandler.java index 16c21224ab..4c95859203 100644 --- a/server/src/com/vaadin/server/communication/HeartbeatHandler.java +++ b/server/src/com/vaadin/server/communication/HeartbeatHandler.java @@ -63,6 +63,9 @@ public class HeartbeatHandler extends SynchronizedRequestHandler implements // Ensure that the browser does not cache heartbeat responses. // iOS 6 Safari requires this (#10370) response.setHeader("Cache-Control", "no-cache"); + // If Content-Type is not set, browsers assume text/html and may + // complain about the empty response body (#12182) + response.setHeader("Content-Type", "text/plain"); } else { response.sendError(HttpServletResponse.SC_NOT_FOUND, "UI not found"); } |