#!/usr/bin/python

# Self-modifing Page Counter
# Copyright (C) 2021 Neil Fraser, California
# https://neil.fraser.name/

# This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as published by the Free Software Foundation.
# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details.  http://www.gnu.org/

# This script is designed to be included in an SHTML document.
# e.g.  <!--#include virtual="cgi-bin/counter.py" -->

# There is no data file to hold the current page count.  Instead,
# the script completely rewrites itself each time it executes.  Note
# that these comments will vanish after the first successful execution.

# Change this variable to point at this script:
filename = '/home/httpd/cgi-bin/counter.py'

n = 1
print('Content-type: text/html' + chr(10) + chr(10) + str(n))

# Here be dragons...
t = "#!/usr/bin/python%cn = %d;print('Content-type: text/html' + chr(10) + chr(10) + str(n));t = %c%s%c;f = open('" + filename + "', 'w');f.write(t %% (10, n + 1, 34, t, 34));f.close()"
f = open(filename, 'w')
f.write(t % (10, n + 1, 34, t, 34))
f.close()