Current counter value: %(value)s
''' def state_fetch(form): try: state = int(form['state'].value) except: state = 1 finally: return state def state_update(state): state = state + 1 return state def state_store(state): if 'SCRIPT_NAME' not in os.environ: return "This is not a CGI script. Can't call again." else: return FORMTEXT_TMPL % \ { 'action': os.environ.get('SCRIPT_NAME', 'not_a_cgi'), 'value' : str(state) } print "Content-type: text/html" print result = [] form = cgi.FieldStorage() if 'state' not in form: print FORMTEXT_TMPL % \ { 'action': os.environ.get('SCRIPT_NAME', 'not_a_cgi' ), 'value': '1' } sys.exit(0) # Fetch old counter value from client oldstate = state_fetch(form) # Compute new counter value newstate = state_update(oldstate) # Send new counter value to client result.append(state_store(newstate)) print '\n'.join(result)