#!/Library/Frameworks/Python.framework/Versions/Current/bin/python
# Q-13 MCS 275 The 22 Apr 2010 : quiz13a.py

# Give code to set up a web server that can handle an indefinite number
# of requests and shuts down when the user presses ctrl+c.
# Web browsers connect to the server via http://localhost:8888/.
# The server maintains a regular file with name '/tmp/data????'
# where ???? are four random digits.
# For every request made by a browser, one line with the current time
# of the request is written to file and the user sees in the browser
# window the content of this file.

from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
from random import randint
from time import ctime

r = randint(1000,9999)
name = '/tmp/data' + str(r)
f = open(name,'w')
f.close()

class WebServer(BaseHTTPRequestHandler):
   """
   Web server to count number of visits to a site.
   """
   def do_GET(self):
      """
      Says welcome to first time connecting client.
      """
      f = open(name,'a')
      f.write(ctime() + '\n')
      f.close()
      f = open(name,'r')
      L = f.readlines()
      f.close()
      for s in L:
         self.wfile.write(s + '\n')

def main():
   """
   Starts up the server.
   """
   try:
      ws = HTTPServer(('',8888),WebServer)
      print 'welcome to our web server'
      print 'press ctrl c to stop server'
      ws.serve_forever()
   except KeyboardInterrupt:
      print ' ctrl c pressed, shutting down'
      ws.socket.close()

main()