django-orchestra/orchestra/core/validators.py

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import re
import crack
from django.core import validators
from django.core.exceptions import ValidationError
from django.utils.translation import ugettext_lazy as _
from IPy import IP
def validate_ipv4_address(value):
msg = _("%s is not a valid IPv4 address") % value
try:
ip = IP(value)
except:
raise ValidationError(msg)
if ip.version() != 4:
raise ValidationError(msg)
def validate_ipv6_address(value):
msg = _("%s is not a valid IPv6 address") % value
try:
ip = IP(value)
except:
raise ValidationError(msg)
if ip.version() != 6:
raise ValidationError(msg)
def validate_ip_address(value):
msg = _("%s is not a valid IP address") % value
try:
ip = IP(value)
except:
raise ValidationError(msg)
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def validate_name(value):
"""
A single non-empty line of free-form text with no whitespace.
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"""
validators.RegexValidator('^\w+$',
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_("Enter a valid name (text without whitspaces)."), 'invalid')(value)
def validate_ascii(value):
try:
value.decode('ascii')
except UnicodeDecodeError:
raise ValidationError('This is not an ASCII string.')
def validate_hostname(hostname):
"""
Ensures that each segment
* contains at least one character and a maximum of 63 characters
* consists only of allowed characters
* doesn't begin or end with a hyphen.
http://stackoverflow.com/a/2532344
"""
if len(hostname) > 255:
return False
if hostname[-1] == ".":
hostname = hostname[:-1] # strip exactly one dot from the right, if present
allowed = re.compile("(?!-)[A-Z\d-]{1,63}(?<!-)$", re.IGNORECASE)
return all(allowed.match(x) for x in hostname.split("."))
def validate_password(value):
try:
crack.VeryFascistCheck(value)
except ValueError, message:
raise ValidationError("Password %s." % str(message)[3:])