##############################################################################
#
# Copyright (c) 2006 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""
"""
import zope.interface
import zope.schema
from z3c.schema.ip import interfaces
[docs]def isValidIPAddress(addr):
"""Returns True if the IP address is valid and False if not."""
# Check that we have four pieces separated by .
pieces = addr.split('.')
if len(pieces) != 4:
return False
# Now check that each piece is an integer between 0 and 255
for piece in pieces:
try:
num = int(piece)
except ValueError:
return False
if not (num >= 0 and num <= 255):
return False
return True
[docs]@zope.interface.implementer(interfaces.IIPAddress)
class IPAddress(zope.schema.NativeStringLine):
"""A valid IP address."""
def _validate(self, value):
super(IPAddress, self)._validate(value)
if not isValidIPAddress(value):
raise interfaces.NotValidIPAdress(value)