177 lines
6.7 KiB
Python
177 lines
6.7 KiB
Python
# Petale - Simple App as Key/Value Storage Interface
|
|
# Copyright (C) 2017 Entr'ouvert
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify it
|
|
# under the terms of the GNU Affero General Public License as published
|
|
# by the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU Affero General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
import hashlib
|
|
|
|
from django.contrib.auth.models import User
|
|
from django.core.mail import send_mail
|
|
from django.core.validators import RegexValidator
|
|
from django.db import models
|
|
from django.utils import six
|
|
from django.utils.translation import ugettext_lazy as _
|
|
|
|
from . import utils
|
|
from .exceptions import GlobalSpaceExhausted, PetalSizeExhausted
|
|
|
|
id_validator = RegexValidator('^[A-Za-z0-9-_]+$')
|
|
|
|
|
|
class Partner(models.Model):
|
|
name = models.CharField(verbose_name=_('Partner'), max_length=64, unique=True, validators=[id_validator])
|
|
admin_emails = models.CharField(
|
|
verbose_name=_('Admin emails'),
|
|
max_length=256,
|
|
blank=True,
|
|
help_text=_('List of admin emails separated by comma'),
|
|
)
|
|
hard_global_max_size = models.IntegerField(verbose_name=_('Hard max size'), help_text=_('as kilobytes'))
|
|
soft_global_max_size = models.IntegerField(verbose_name=_('Soft max size'), help_text=_('as kilobytes'))
|
|
hard_per_key_max_size = models.IntegerField(
|
|
verbose_name=_('Hard max size per key'), help_text=_('as kilobytes')
|
|
)
|
|
soft_per_key_max_size = models.IntegerField(
|
|
verbose_name=_('Soft max size per key'), help_text=_('as kilobytes')
|
|
)
|
|
size = models.BigIntegerField(verbose_name=_('Size'), default=0, help_text=_('as bytes'))
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
def check_limits(self, size_delta, **kwargs):
|
|
new_size = self.size + size_delta
|
|
|
|
if new_size > self.hard_global_max_size * 1024:
|
|
raise GlobalSpaceExhausted
|
|
|
|
if self.size < self.soft_global_max_size * 1024 and new_size > self.soft_global_max_size * 1024:
|
|
self.notify_admins(
|
|
subject=_('Partner %s space almost exhausted') % self.name,
|
|
# pylint: disable=no-member
|
|
body=_('Current size: {current_size}, Max size: {max_size}').format(
|
|
current_size=new_size, max_size=self.hard_global_max_size * 1024
|
|
),
|
|
**kwargs,
|
|
)
|
|
|
|
def notify_admins(self, subject, body, **kwargs):
|
|
if kwargs:
|
|
body += '\n'
|
|
for key, value in kwargs.items():
|
|
body += '\n %s = %r' % (key, value)
|
|
send_mail(subject, body, None, self.admin_emails.split(','))
|
|
|
|
class Meta:
|
|
verbose_name = _('Partner')
|
|
verbose_name_plural = _('Partners')
|
|
ordering = ['name']
|
|
|
|
|
|
class CUT(models.Model):
|
|
uuid = models.CharField(max_length=255, validators=[id_validator], unique=True)
|
|
|
|
def __str__(self):
|
|
return self.uuid
|
|
|
|
class Meta:
|
|
verbose_name = _('CUT')
|
|
verbose_name_plural = _('CUTs')
|
|
|
|
|
|
def petal_directory(instance, filename):
|
|
assert instance.name
|
|
assert instance.partner
|
|
assert instance.partner.name
|
|
assert instance.cut
|
|
assert instance.cut.uuid
|
|
|
|
return 'data/{}/{}/{}/{}'.format(
|
|
instance.partner.name,
|
|
hashlib.md5(instance.cut.uuid.encode('ascii')).hexdigest()[:3],
|
|
instance.cut.uuid,
|
|
instance.name,
|
|
)
|
|
|
|
|
|
class Petal(models.Model):
|
|
created_at = models.DateTimeField(_('Created'), auto_now_add=True)
|
|
updated_at = models.DateTimeField(_('Updated'), auto_now=True)
|
|
name = models.CharField(_('Name'), max_length=128, validators=[id_validator])
|
|
etag = models.CharField(_('ETag'), max_length=256)
|
|
data = models.FileField(_('Data Content'), max_length=512, upload_to=petal_directory)
|
|
content_type = models.CharField(_('Content type'), max_length=128)
|
|
size = models.IntegerField(_('Size'), default=0, help_text=_('as bytes'))
|
|
cut = models.ForeignKey(CUT, on_delete=models.CASCADE)
|
|
partner = models.ForeignKey(Partner, on_delete=models.CASCADE)
|
|
|
|
def __str__(self):
|
|
return '%s/%s/%s' % (self.partner.name, self.cut.uuid, self.name)
|
|
|
|
def clean(self):
|
|
if self.data:
|
|
self.size = self.data.size
|
|
self.etag = utils.etag(self.data)
|
|
|
|
def check_limits(self, content_length):
|
|
'''Delegate global limits check to partner, and check per key size limits'''
|
|
size_delta = content_length - self.size
|
|
|
|
self.partner.check_limits(size_delta, partner=self.partner.name, cut=self.cut.uuid, key=self.name)
|
|
|
|
if content_length > self.partner.hard_per_key_max_size * 1024:
|
|
raise PetalSizeExhausted
|
|
|
|
if (
|
|
self.size <= self.partner.soft_per_key_max_size * 1024
|
|
and content_length > self.partner.soft_per_key_max_size * 1024
|
|
):
|
|
self.partner.notify_admins(
|
|
# pylint: disable=no-member
|
|
_('Key {key} space of partner {partner} almost exhausted').format(
|
|
key=self.name, partner=self.partner.name
|
|
),
|
|
# pylint: disable=no-member
|
|
_('Current size: {current_size}, Max size: {max_size}').format(
|
|
current_size=content_length, max_size=self.partner.hard_per_key_max_size * 1024
|
|
),
|
|
partner=self.partner.name,
|
|
cut=self.cut.uuid,
|
|
key=self.name,
|
|
)
|
|
|
|
class Meta:
|
|
unique_together = ('name', 'partner', 'cut')
|
|
verbose_name = _('Petal')
|
|
verbose_name_plural = _('Petals')
|
|
|
|
|
|
class AccessControlList(models.Model):
|
|
order = models.IntegerField(_('Order'))
|
|
partner = models.ForeignKey(Partner, verbose_name=_('Partner'), on_delete=models.CASCADE)
|
|
user = models.ForeignKey(User, verbose_name=_('User'), on_delete=models.CASCADE)
|
|
methods = models.CharField(
|
|
_('Allowed methods'), max_length=128, default='GET,PUT,DELETE', help_text=("GET, PUT, DELETE")
|
|
)
|
|
key = models.CharField(_('Allowed keys'), max_length=128, default='*')
|
|
|
|
def __str__(self):
|
|
return '%s %s %s %s' % (self.partner.name, self.user.username, self.methods, self.key)
|
|
|
|
class Meta:
|
|
verbose_name = _('Access control list')
|
|
verbose_name_plural = _('Access control lists')
|
|
ordering = ['partner__name', 'user__username', 'order', 'key', 'methods']
|