Mac/Demo/example1/dnslookup-1.py

   1 """Sample program performing domain name lookups and showing off EasyDialogs,
   2 Res and Dlg in the process"""
   3
   4 import EasyDialogs
   5 from Carbon import Res
   6 from Carbon import Dlg
   7 import sys
   8 import socket
   9 import string
  10 import macresource
  11 #
  12 # Definitions for our resources
  13 ID_MAIN=512
  14
  15 ITEM_LOOKUP_ENTRY=1
  16 ITEM_RESULT=2
  17 ITEM_LOOKUP_BUTTON=3
  18 ITEM_QUIT_BUTTON=4
  19
  20 def main():
  21     """Main routine: open resource file, call dialog handler"""
  22     macresource.need("DLOG", ID_MAIN, "dnslookup-1.rsrc")
  23     do_dialog()
  24
  25 def do_dialog():
  26     """Post dialog and handle user interaction until quit"""
  27     my_dlg = Dlg.GetNewDialog(ID_MAIN, -1)
  28     while 1:
  29         n = Dlg.ModalDialog(None)
  30         if n == ITEM_LOOKUP_BUTTON:
  31             tp, h, rect = my_dlg.GetDialogItem(ITEM_LOOKUP_ENTRY)
  32             txt = Dlg.GetDialogItemText(h)
  33
  34             tp, h, rect = my_dlg.GetDialogItem(ITEM_RESULT)
  35             Dlg.SetDialogItemText(h, dnslookup(txt))
  36         elif n == ITEM_QUIT_BUTTON:
  37             break
  38
  39 def dnslookup(str):
  40     """ Perform DNS lookup on str.  If first character of digit is numeric,
  41         assume that str contains an IP address.  Otherwise, assume that str
  42         contains a hostname."""
  43     if str == '': str = ' '
  44     if str[0] in string.digits:
  45         try:
  46             value = socket.gethostbyaddr(str)[0]
  47         except:
  48             value = 'Lookup failed'
  49     else:
  50         try:
  51             value = socket.gethostbyname(str)
  52         except:
  53             value = 'Lookup failed'
  54     return value
  55
  56 main()
  57