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"""MX records storage.""" import datetime from django.db import models from django.utils import timezone from django.utils.encoding import python_2_unicode_compatible from modoboa.parameters import tools as param_tools class MXRecordQuerySet(models.QuerySet): """Custom manager for MXRecord.""" def has_valids(self): """Return managed results.""" if param_tools.get_global_parameter("valid_mxs").strip(): return self.filter(managed=True).exists() return self.exists() class MXRecordManager(models.Manager): """Custom manager for MXRecord.""" def get_or_create_for_domain(self, domain, ttl=7200): """Get or create MX record(s) for given domain. DNS queries are not performed while `ttl` (in seconds) is still valid. """ from .. import lib now = timezone.now() records = self.get_queryset().filter( domain=domain, updated__gt=now) if records.exists(): for record in records: yield record return self.get_queryset().filter(domain=domain).delete() delta = datetime.timedelta(seconds=ttl) domain_mxs = lib.get_domain_mx_list(domain.name) if len(domain_mxs) == 0: return for mx_addr, mx_ip_addr in domain_mxs: record = self.get_queryset().create( domain=domain, name="{}".format(mx_addr.strip(".")), address="{}".format(mx_ip_addr), updated=now + delta) yield record @python_2_unicode_compatible class MXRecord(models.Model): """A model used to store MX records for Domain.""" domain = models.ForeignKey("admin.Domain", on_delete=models.CASCADE) name = models.CharField(max_length=254) address = models.GenericIPAddressField() managed = models.BooleanField(default=False) updated = models.DateTimeField() objects = MXRecordManager.from_queryset(MXRecordQuerySet)() def is_managed(self): if not param_tools.get_global_parameter("enable_mx_checks"): return False return bool(param_tools.get_global_parameter("valid_mxs").strip()) def __str__(self): return "{0.name} ({0.address}) for {0.domain} ".format(self) class DNSBLQuerySet(models.QuerySet): """Custom manager for DNSBLResultManager.""" def blacklisted(self): """Return blacklisted results.""" return self.exclude(status="") class DNSBLResult(models.Model): """Store a DNSBL query result.""" domain = models.ForeignKey("admin.Domain", on_delete=models.CASCADE) provider = models.CharField(max_length=254, db_index=True) mx = models.ForeignKey(MXRecord, on_delete=models.CASCADE) status = models.CharField(max_length=45, blank=True, db_index=True) objects = models.Manager.from_queryset(DNSBLQuerySet)() class Meta: app_label = "admin" unique_together = [("domain", "provider", "mx")]