Gist for replacing an image using Squid

doodle.py

#!/usr/bin/env python
import sys

def is_logo(url):
    # This logo1w.png can change each day
	if url.endswith('logo1w.png'):
	    return True
	else:
	    return False

while True:
	input_line = sys.stdin.readline().strip()
	url = input_line.split(' ')[0]
	if is_logo(url):
	    new_url = 'http://path.to.localserver/images/ashok.png\n'
	else:
	    new_url = url + '\n'
        # Do note that new_url should end with a \n
	sys.stdout.write(new_url)
	sys.stdout.flush()