From 0d4770e2902688eebd61279542e579a5cf9a048a Mon Sep 17 00:00:00 2001
From: Vincent Riquer <vincent+sites.ingressstats@riquer.fr>
Date: Wed, 11 Jun 2014 16:25:43 +0200
Subject: [PATCH] Last-Modified: use ingress last update time

---
 graph | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/graph b/graph
index 311e4e0..20da785 100755
--- a/graph
+++ b/graph
@@ -247,7 +247,10 @@ else
 	now=$(date +%s)
 	cat <<-EOHEAD
 		content-type: image/png
-		Last-Modified: $(LC_ALL=C TZ=GMT date +'%a, %d %b %Y %X %Z')
+		Last-Modified: $(
+			LC_ALL=C TZ=GMT date +'%a, %d %b %Y %X %Z'	\
+			-d @$(rrdtool last ingress.rrd)
+		)
 		Expires: $(LC_ALL=C TZ=GMT date +'%a, %d %b %Y %X %Z' -d '1 hour')
 		Cache-Control: max-age=0, must-revalidate