Return 404 if a resource cannot be found (#10053)

Change-Id: Iaf87eb7af6f89decb61b7fd2ac953ca6a6dac15a

diff --git a/server/src/com/vaadin/server/DownloadStream.java b/server/src/com/vaadin/server/DownloadStream.java
index 3ba8b3d39abbabc94dd5767e3383ef3506a64681..5757f7ca9355e7ab77ca59f7872275df70b2fd6e 100644 (file)
--- a/server/src/com/vaadin/server/DownloadStream.java
+++ b/server/src/com/vaadin/server/DownloadStream.java
@@ -250,6 +250,11 @@ public class DownloadStream implements Serializable {
 
         // Download from given stream
         final InputStream data = getStream();
+        if (data == null) {
+            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+            return;
+        }
+
         if (data != null) {
 
             OutputStream out = null;