text: #!/usr/bin/env python
  
  """
  <Program>
    simple_server.py
   
  <Author>
    Konstantin Andrianov.
  
  <Started>
    February 15, 2012.
    
  <Copyright>
    See LICENSE for licensing information.
  
  <Purpose>
    This is a basic server that was designed to be used in conjunction with 
    test_download.py to test download.py module. 
  
  <Reference>
    SimpleHTTPServer:
      http://docs.python.org/library/simplehttpserver.html#module-SimpleHTTPServer
  """
  
  # Help with Python 3 compatibility, where the print statement is a function, an
  # implicit relative import is invalid, and the '/' operator performs true
  # division.  Example:  print 'hello world' raises a 'SyntaxError' exception.
  from __future__ import print_function
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import unicode_literals
  
  import sys
  import random
  
  import tuf._vendor.six as six
  
  PORT = 0
  
  def _port_gen():
    return random.randint(30000, 45000)
  
  if len(sys.argv) > 1:
    try:
      PORT = int(sys.argv[1])
      if PORT < 30000 or PORT > 45000:
        raise ValueError
    
    except ValueError:
      PORT = _port_gen()
  
  else:
    PORT = _port_gen()
  
  Handler = six.moves.SimpleHTTPServer.SimpleHTTPRequestHandler
  httpd = six.moves.socketserver.TCPServer(('', PORT), Handler)
  
  httpd.serve_forever()
  