django-orchestra-test/orchestra/apps/domains/models.py

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2014-05-08 16:59:35 +00:00
from django.core.exceptions import ValidationError
from django.db import models
from django.utils.translation import ugettext_lazy as _
from orchestra.core import services
from orchestra.core.validators import (validate_ipv4_address, validate_ipv6_address,
validate_hostname, validate_ascii)
from orchestra.utils.functional import cached
from . import settings, validators, utils
class Domain(models.Model):
name = models.CharField(_("name"), max_length=256, unique=True,
validators=[validate_hostname, validators.validate_allowed_domain])
account = models.ForeignKey('accounts.Account', verbose_name=_("Account"),
related_name='domains', blank=True)
top = models.ForeignKey('domains.Domain', null=True, related_name='subdomains')
serial = models.IntegerField(_("serial"), default=utils.generate_zone_serial,
help_text=_("Serial number"))
def __unicode__(self):
return self.name
@property
@cached
def origin(self):
return self.top or self
def get_records(self):
""" proxy method, needed for input validation """
return self.records.all()
def get_topsubdomains(self):
""" proxy method, needed for input validation """
return self.origin.subdomains.all()
def get_subdomains(self):
return self.get_topsubdomains().filter(name__regex=r'.%s$' % self.name)
def render_zone(self):
origin = self.origin
zone = origin.render_records()
for subdomain in origin.get_topsubdomains():
zone += subdomain.render_records()
return zone
def refresh_serial(self):
""" Increases the domain serial number by one """
serial = utils.generate_zone_serial()
if serial <= self.serial:
num = int(str(self.serial)[8:]) + 1
if num >= 99:
raise ValueError('No more serial numbers for today')
serial = str(self.serial)[:8] + '%.2d' % num
serial = int(serial)
self.serial = serial
self.save()
def render_records(self):
types = {}
records = []
for record in self.get_records():
types[record.type] = True
if record.type == record.SOA:
# Update serial and insert at 0
value = record.value.split()
value[2] = str(self.serial)
records.insert(0, (record.SOA, ' '.join(value)))
else:
records.append((record.type, record.value))
if not self.top:
if Record.NS not in types:
for ns in settings.DOMAINS_DEFAULT_NS:
records.append((Record.NS, ns))
if Record.SOA not in types:
soa = [
"%s." % settings.DOMAINS_DEFAULT_NAME_SERVER,
utils.format_hostmaster(settings.DOMAINS_DEFAULT_HOSTMASTER),
str(self.serial),
settings.DOMAINS_DEFAULT_REFRESH,
settings.DOMAINS_DEFAULT_RETRY,
settings.DOMAINS_DEFAULT_EXPIRATION,
settings.DOMAINS_DEFAULT_MIN_CACHING_TIME
]
records.insert(0, (Record.SOA, ' '.join(soa)))
no_cname = Record.CNAME not in types
if Record.MX not in types and no_cname:
for mx in settings.DOMAINS_DEFAULT_MX:
records.append((Record.MX, mx))
if (Record.A not in types and Record.AAAA not in types) and no_cname:
records.append((Record.A, settings.DOMAINS_DEFAULT_A))
result = ''
for type, value in records:
name = '%s.%s' % (self.name, ' '*(37-len(self.name)))
type = '%s %s' % (type, ' '*(7-len(type)))
result += '%s IN %s %s\n' % (name, type, value)
return result
def save(self, *args, **kwargs):
""" create top relation """
update = False
if not self.pk:
top = self.get_top()
if top:
self.top = top
else:
update = True
super(Domain, self).save(*args, **kwargs)
if update:
domains = Domain.objects.exclude(pk=self.pk)
for domain in domains.filter(name__endswith=self.name):
domain.top = self
domain.save()
self.get_subdomains().update(account=self.account)
def get_top(self):
split = self.name.split('.')
top = None
for i in range(1, len(split)-1):
name = '.'.join(split[i:])
domain = Domain.objects.filter(name=name)
if domain:
top = domain.get()
return top
class Record(models.Model):
""" Represents a domain resource record """
MX = 'MX'
NS = 'NS'
CNAME = 'CNAME'
A = 'A'
AAAA = 'AAAA'
SRV = 'SRV'
TXT = 'TXT'
SOA = 'SOA'
TYPE_CHOICES = (
(MX, "MX"),
(NS, "NS"),
(CNAME, "CNAME"),
(A, _("A (IPv4 address)")),
(AAAA, _("AAAA (IPv6 address)")),
(SRV, "SRV"),
(TXT, "TXT"),
(SOA, "SOA"),
)
# TODO TTL
domain = models.ForeignKey(Domain, verbose_name=_("domain"), related_name='records')
type = models.CharField(max_length=32, choices=TYPE_CHOICES)
value = models.CharField(max_length=256)
def __unicode__(self):
return "%s IN %s %s" % (self.domain, self.type, self.value)
def clean(self):
""" validates record value based on its type """
# validate value
mapp = {
self.MX: validators.validate_mx_record,
self.NS: validators.validate_zone_label,
self.A: validate_ipv4_address,
self.AAAA: validate_ipv6_address,
self.CNAME: validators.validate_zone_label,
self.TXT: validate_ascii,
self.SRV: validators.validate_srv_record,
self.SOA: validators.validate_soa_record,
}
mapp[self.type](self.value)
services.register(Domain)