#!/usr/bin/env python

__doc__ = '''Indirect website logging utility. This script can help generate a
log via CGI, when the regular Apache log is not accessible. Change the LOGFILE
location below, to a writable location where the log will be emitted. The log
will be in Apache's "combined" format. Then, insert the following code in the
HTML pages you would like to track:

<!-- logging -->
<script type="text/javascript" language="JavaScript"><!--
  d=document; d.write('<img src="http://some.host/cgi-bin/wwwlogger.cgi?'+escape(d.referrer)+'" alt="*" border=0 width="1" height="1" align="right">');
// --></script>
<noscript>
  <img src="http://some.host/cgi-bin/wwwlogger.cgi" alt="*" border=0 width="1" height="1" align="right">
</noscript>
'''

import os, sys, time

#######################################
# Globals

LOGFILE = '/home/barr/rim.log'

GIFTRANS1x1 = 'GIF89a\001\000\001\000\200\377\000\300\300\300\000\000\000!\371\004\001\000\000\000\000,\000\000\000\000\001\000\001\000\000\002\002D\001\000;'

#######################################
# Emit GIF

sys.stdout.write('Content-Type: image/gif\n')
sys.stdout.write('Cache-Control: no-cache\n')
sys.stdout.write('Pragma: no-cache\n')
sys.stdout.write('Expires: Sun, 01 Jan 1995 01:01:01 GMT\n')
sys.stdout.write('\n')
sys.stdout.write(GIFTRANS1x1)

#######################################
# Log entry

try:
  f = open(LOGFILE, 'a+')
  timestamp = time.strftime('[%d/%b/%Y:%H:%M:%S %Z]', time.localtime(time.time()))
  request = '%s %s %s' % (
    os.environ['REQUEST_METHOD'],
    os.environ['HTTP_REFERER'],
    os.environ['SERVER_PROTOCOL'],
  )
  f.write('%s %s %s %s "%s" %s %s "%s" "%s"\n' % (
    os.environ['REMOTE_ADDR'],    # remote host
    '-',                          # remote logname
    '-',                          # remote user
    timestamp,                    # time
    request,                      # request first line
    '200',                        # status
    '-',                          # size
    os.environ['QUERY_STRING'],   # referrer
    os.environ['HTTP_USER_AGENT'],# user agent
    ))
  f.close()
except:
  pass