#!/usr/bin/python
"""PUT Handler for Apache and Wikke.
Sean B. Palmer and Adam Wendt, 2004-02.

Example .htaccess: 

DirectoryIndex index.html
ErrorDocument 404 /wikke/wikke.php
Options -MultiViews
RewriteEngine on
RewriteBase /wikke
RewriteRule ^([A-Za-z]+)$ put.py [L]

When using this file, reset the global base variable.
"""

import sys, os, cgi, urllib

desc = {404: 'Not Found',
        401: 'Not authorized',
        200: 'OK',
        201: 'Created',
        301: 'Permanent redirect',
        302: 'Redirect',
        500: 'Internal server error'}
base = 'http://jane.no-ip.com/~sbp/wikke/'
referer = os.environ.get('HTTP_REFERER')

def serve(status, s): 
   sys.stdout.write('Status: %s %s\n' % (status, desc[status]))
   if status == 302: 
      r = env.get('REQUEST_URI'); i = r.rfind('/'); r = r[i+1:]
      sys.stdout.write('location: %s%s\n\n' % (base, r))
   else: 
      sys.stdout.write('Content-Type: text/html\n\n')
      sys.stdout.write(s)

def main(env=None): 
   if env is None: 
      env = os.environ

   REQUEST_URI = env.get('REQUEST_URI')
   assert REQUEST_URI, 'no request URI'

   i = REQUEST_URI.rfind('/')
   assert i > 0, '/ not found in the request URI'

   fn = REQUEST_URI[i+1:]
   assert fn.isalpha(), 'Filename must be alphabetical %s' % fn

   if env.get('REQUEST_METHOD') == 'PUT': 
      s = sys.stdin.read()
      s = s[:5000] # limit file sizes to 5000 bytes
      open(fn, 'w').write(s)
      serve(302, 'Done')
   elif os.path.exists(fn): 
      serve(200, open(fn).read())
   else: 
      u = urllib.urlopen(base + 'wikke.php/' + fn)
      s = u.read()
      u.close()
      serve(200, s)
      if fn == 'env': print `os.environ`
      # serve(404, 'Not Found: %s' % fn)

if __name__=='__main__': 
   try: main()
   except: cgi.print_exception()