#!/bin/sh -x
+# sudo apt-get install jq
+#
# install as cgi-script and invoke to get png
#ssh rpi 'cat `ls -t /dev/shm/vaillant.* | head -1` | sed "s/ .*| */ /"' > /dev/shm/temp.tsv
convert /dev/shm/temp2.png -gravity center -extent 600x800 -colorspace Gray /dev/shm/temp2-gray.png
# ln -s /dev/shm/temp2-gray.png /var/www/html/temp2.png
-echo Location: temp2.png
+echo "Location: $REQUEST_SCHEME://$SERVER_NAME:$SERVER_PORT/temp2.png"
echo
exit 0