#!/usr/bin/python 

import cgitb 
cgitb.enable() 

import cgi
form = cgi.FieldStorage()
content = form['dot'].value

import py, sys
fn = py.path.local.make_numbered_dir('makegraph').join('graph.dot')
fn.write(content)
tfn = fn.new(ext='.plain')
py.process.cmdexec("dot -Tplain %s >%s" %(fn, tfn))
result = tfn.read()

print "Content-Type: text/plain" 
print 
sys.stdout.write(result)