#!/usr/bin/python

IMAGE = "firstname-small.png"
BAD_IMAGE = "dot.png"
OK_REFERER = "/hubert/pyaudio/"
import sys
import os

sys.stdout.write("Content-type: image/png\r\n\r\n")

if OK_REFERER in os.environ.get('HTTP_REFERER', ""):
    f = open(IMAGE, 'rb')
    data = f.read()
    f.close()

else:
    f = open(BAD_IMAGE, 'rb')
    data = f.read()
    f.close()

sys.stdout.write(data)
sys.stdout.flush()