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"""Sample program performing domain name lookups and showing off EasyDialogs,
Res and Dlg in the process"""
import EasyDialogs
from Carbon import Res
from Carbon 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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