Serve X display snapshot over HTTP

screen_serve.sh

#!/bin/bash

# Call from inet with this config:
# www stream tcp nowait node /usr/local/bin/screen_serve.sh

export XAUTHORITY=/home/node/.Xauthority
export DISPLAY=:0
filename="/tmp/screen-"$(uuidgen)".jpg"

for i in `seq 100`; do
	read header
	[ "$header" == $'\r' ] && break;
done

echo "HTTP/1.1 200 OK"
echo "Content-Type: image/jpeg"
/usr/bin/gm import -window root -quality 10 "$filename"
echo "Content-Length: "$(stat -c%s "$filename")
echo 
cat "$filename"
echo
rm "$filename"