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()