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263 lines
11 KiB
Python
263 lines
11 KiB
Python
import datetime
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import random
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import re
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from django.utils.hashcompat import sha_constructor
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from django.conf import settings
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from django.contrib.auth.models import User
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from django.contrib.sites.models import Site
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from django.db import models
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from django.db import transaction
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from django.template.loader import render_to_string
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from django.utils.translation import ugettext_lazy as _
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SHA1_RE = re.compile('^[a-f0-9]{40}$')
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class RegistrationManager(models.Manager):
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"""
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Custom manager for the ``RegistrationProfile`` model.
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The methods defined here provide shortcuts for account creation
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and activation (including generation and emailing of activation
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keys), and for cleaning out expired inactive accounts.
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"""
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def activate_user(self, activation_key):
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"""
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Validate an activation key and activate the corresponding
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``User`` if valid.
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If the key is valid and has not expired, return the ``User``
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after activating.
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If the key is not valid or has expired, return ``False``.
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If the key is valid but the ``User`` is already active,
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return ``False``.
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To prevent reactivation of an account which has been
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deactivated by site administrators, the activation key is
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reset to the string constant ``RegistrationProfile.ACTIVATED``
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after successful activation.
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To execute customized logic when a ``User`` is activated,
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connect a function to the signal
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``registration.signals.user_activated``; this signal will be
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sent (with the ``User`` as the value of the keyword argument
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``user``) after a successful activation.
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"""
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from registration.signals import user_activated
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# Make sure the key we're trying conforms to the pattern of a
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# SHA1 hash; if it doesn't, no point trying to look it up in
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# the database.
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if SHA1_RE.search(activation_key):
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try:
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profile = self.get(activation_key=activation_key)
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except self.model.DoesNotExist:
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return False
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if not profile.activation_key_expired():
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user = profile.user
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user.is_active = True
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user.save()
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profile.activation_key = self.model.ACTIVATED
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profile.save()
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user_activated.send(sender=self.model, user=user)
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return user
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return False
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def create_inactive_user(self, username, password, email,
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send_email=True):
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"""
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Create a new, inactive ``User``, generate a
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``RegistrationProfile`` and email its activation key to the
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``User``, returning the new ``User``.
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To disable the email, call with ``send_email=False``.
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The activation email will make use of two templates:
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``registration/activation_email_subject.txt``
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This template will be used for the subject line of the
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email. It receives one context variable, ``site``, which
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is the currently-active
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``django.contrib.sites.models.Site`` instance. Because it
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is used as the subject line of an email, this template's
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output **must** be only a single line of text; output
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longer than one line will be forcibly joined into only a
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single line.
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``registration/activation_email.txt``
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This template will be used for the body of the email. It
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will receive three context variables: ``activation_key``
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will be the user's activation key (for use in constructing
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a URL to activate the account), ``expiration_days`` will
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be the number of days for which the key will be valid and
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``site`` will be the currently-active
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``django.contrib.sites.models.Site`` instance.
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To execute customized logic once the new ``User`` has been
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created, connect a function to the signal
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``registration.signals.user_registered``; this signal will be
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sent (with the new ``User`` as the value of the keyword
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argument ``user``) after the ``User`` and
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``RegistrationProfile`` have been created, and the email (if
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any) has been sent..
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"""
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from registration.signals import user_registered
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new_user = User.objects.create_user(username, email, password)
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new_user.is_active = False
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new_user.save()
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registration_profile = self.create_profile(new_user)
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if send_email:
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from django.core.mail import send_mail, EmailMultiAlternatives
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current_site = Site.objects.get_current()
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subject = render_to_string('registration/activation_email_subject.txt',
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{ 'site': settings.URL_ROOT })
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# Email subject *must not* contain newlines
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subject = ''.join(subject.splitlines())
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text_content = render_to_string('registration/activation_email.txt',
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{ 'activation_key': registration_profile.activation_key,
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'expiration_days': settings.ACCOUNT_ACTIVATION_DAYS,
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'site': settings.URL_ROOT })
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html_content = render_to_string('registration/activation_email.html',
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{ 'activation_key': registration_profile.activation_key,
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'expiration_days': settings.ACCOUNT_ACTIVATION_DAYS,
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'site': settings.URL_ROOT })
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msg = EmailMultiAlternatives(subject, text_content, settings.DEFAULT_FROM_EMAIL, [new_user.email])
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msg.attach_alternative(html_content, "text/html")
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msg.send()
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# send_mail(subject, message, settings.DEFAULT_FROM_EMAIL, [new_user.email])
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user_registered.send(sender=self.model, user=new_user)
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return new_user
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create_inactive_user = transaction.commit_on_success(create_inactive_user)
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def create_profile(self, user):
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"""
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Create a ``RegistrationProfile`` for a given
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``User``, and return the ``RegistrationProfile``.
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The activation key for the ``RegistrationProfile`` will be a
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SHA1 hash, generated from a combination of the ``User``'s
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username and a random salt.
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"""
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salt = sha_constructor(str(random.random())).hexdigest()[:5]
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activation_key = sha_constructor(salt+user.username).hexdigest()
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return self.create(user=user,
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activation_key=activation_key)
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def delete_expired_users(self):
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"""
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Remove expired instances of ``RegistrationProfile`` and their
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associated ``User``s.
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Accounts to be deleted are identified by searching for
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instances of ``RegistrationProfile`` with expired activation
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keys, and then checking to see if their associated ``User``
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instances have the field ``is_active`` set to ``False``; any
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``User`` who is both inactive and has an expired activation
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key will be deleted.
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It is recommended that this method be executed regularly as
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part of your routine site maintenance; this application
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provides a custom management command which will call this
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method, accessible as ``manage.py cleanupregistration``.
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Regularly clearing out accounts which have never been
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activated serves two useful purposes:
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1. It alleviates the ocasional need to reset a
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``RegistrationProfile`` and/or re-send an activation email
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when a user does not receive or does not act upon the
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initial activation email; since the account will be
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deleted, the user will be able to simply re-register and
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receive a new activation key.
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2. It prevents the possibility of a malicious user registering
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one or more accounts and never activating them (thus
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denying the use of those usernames to anyone else); since
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those accounts will be deleted, the usernames will become
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available for use again.
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If you have a troublesome ``User`` and wish to disable their
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account while keeping it in the database, simply delete the
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associated ``RegistrationProfile``; an inactive ``User`` which
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does not have an associated ``RegistrationProfile`` will not
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be deleted.
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"""
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for profile in self.all():
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if profile.activation_key_expired():
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user = profile.user
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if not user.is_active:
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user.delete()
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class RegistrationProfile(models.Model):
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"""
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A simple profile which stores an activation key for use during
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user account registration.
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Generally, you will not want to interact directly with instances
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of this model; the provided manager includes methods
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for creating and activating new accounts, as well as for cleaning
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out accounts which have never been activated.
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While it is possible to use this model as the value of the
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``AUTH_PROFILE_MODULE`` setting, it's not recommended that you do
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so. This model's sole purpose is to store data temporarily during
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account registration and activation.
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"""
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ACTIVATED = u"ALREADY_ACTIVATED"
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user = models.ForeignKey(User, unique=True, verbose_name=_('user'))
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activation_key = models.CharField(_('activation key'), max_length=40)
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objects = RegistrationManager()
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class Meta:
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verbose_name = _('registration profile')
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verbose_name_plural = _('registration profiles')
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def __unicode__(self):
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return u"Registration information for %s" % self.user
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def activation_key_expired(self):
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"""
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Determine whether this ``RegistrationProfile``'s activation
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key has expired, returning a boolean -- ``True`` if the key
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has expired.
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Key expiration is determined by a two-step process:
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1. If the user has already activated, the key will have been
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reset to the string constant ``ACTIVATED``. Re-activating
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is not permitted, and so this method returns ``True`` in
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this case.
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2. Otherwise, the date the user signed up is incremented by
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the number of days specified in the setting
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``ACCOUNT_ACTIVATION_DAYS`` (which should be the number of
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days after signup during which a user is allowed to
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activate their account); if the result is less than or
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equal to the current date, the key has expired and this
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method returns ``True``.
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"""
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expiration_date = datetime.timedelta(days=settings.ACCOUNT_ACTIVATION_DAYS)
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return self.activation_key == self.ACTIVATED or \
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(self.user.date_joined + expiration_date <= datetime.datetime.now())
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activation_key_expired.boolean = True
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