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"""Sample program performing domain name lookups and showing off EasyDialogs,
Res and Dlg in the process"""
import EasyDialogs
import Res
import Dlg
import sys
import socket
import string
#
# Definitions for our resources
ID_MAIN=512
ITEM_LOOKUP_ENTRY=1
ITEM_RESULT=2
ITEM_LOOKUP_BUTTON=3
ITEM_QUIT_BUTTON=4
def main():
"""Main routine: open resource file, call dialog handler"""
try:
Res.FSpOpenResFile("dnslookup-1.rsrc", 1)
except Res.Error:
EasyDialogs.Message("Cannot open dnslookup-1.rsrc")
sys.exit(1)
do_dialog()
def do_dialog():
"""Post dialog and handle user interaction until quit"""
my_dlg = Dlg.GetNewDialog(ID_MAIN, -1)
while 1:
n = Dlg.ModalDialog(None)
if n == ITEM_LOOKUP_BUTTON:
tp, h, rect = my_dlg.GetDialogItem(ITEM_LOOKUP_ENTRY)
txt = Dlg.GetDialogItemText(h)
tp, h, rect = my_dlg.GetDialogItem(ITEM_RESULT)
Dlg.SetDialogItemText(h, dnslookup(txt))
elif n == ITEM_QUIT_BUTTON:
break
def dnslookup(str):
""" Perform DNS lookup on str. If first character of digit is numeric,
assume that str contains an IP address. Otherwise, assume that str
contains a hostname."""
if str == '': str = ' '
if str[0] in string.digits:
try:
value = socket.gethostbyaddr(str)[0]
except:
value = 'Lookup failed'
else:
try:
value = socket.gethostbyname(str)
except:
value = 'Lookup failed'
return value
main()
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