# called from within HTML page to log visitors:
# <script src="log_visitors.py"></script>
#

import sys
import os
import time

fn = "visitors.log"
with open(fn, "a") as file:
    file.write(
        time.ctime()
        + " "
        + os.environ["HTTP_X_REAL_IP"]
        + " "
        + os.environ["HTTP_USER_AGENT"]
        + "\n"
    )