Import Upstream version 2.7.18

Mac/Demo/example1/dnslookup-1.py

@@ -0,0 +1,55 @@
+"""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 socket
+import string
+import macresource
+#
+# 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"""
+    macresource.need("DLOG", ID_MAIN, "dnslookup-1.rsrc")
+    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()