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