4b75fcab5f6ceb108cf80bf40e76a3383f9d88af
[django-cas-provider.git] / cas_provider / models.py
1 from django.conf import settings
2 from django.db import models
3 from django.utils.translation import ugettext_lazy as _
4 from random import Random
5 import string
6 import urllib
7 import urlparse
8
9 if hasattr(urlparse, 'parse_qs'):
10     parse_qs = urlparse.parse_qs
11 else:
12     # Python <2.6 compatibility
13     from cgi import parse_qs
14
15 __all__ = ['ServiceTicket', 'LoginTicket', 'ProxyGrantingTicket', 'ProxyTicket', 'ProxyGrantingTicketIOU']
16
17 class BaseTicket(models.Model):
18     ticket = models.CharField(_('ticket'), max_length=32)
19     created = models.DateTimeField(_('created'), auto_now=True)
20
21     class Meta:
22         abstract = True
23
24     def __init__(self, *args, **kwargs):
25         if 'ticket' not in kwargs:
26             kwargs['ticket'] = self._generate_ticket()
27         super(BaseTicket, self).__init__(*args, **kwargs)
28
29     def __unicode__(self):
30         return self.ticket
31
32     def _generate_ticket(self, length=ticket.max_length, chars=string.ascii_letters + string.digits):
33         """ Generates a random string of the requested length. Used for creation of tickets. """
34         return u"%s-%s" % (self.prefix, ''.join(Random().sample(chars, length - (len(self.prefix) + 1))))
35
36
37 class ServiceTicket(BaseTicket):
38     user = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name=_('user'))
39     service = models.URLField(_('service'))
40
41     prefix = 'ST'
42
43     class Meta:
44         verbose_name = _('Service Ticket')
45         verbose_name_plural = _('Service Tickets')
46
47     def get_redirect_url(self):
48         parsed = urlparse.urlparse(self.service)
49         query = parse_qs(parsed.query)
50         query['ticket'] = [self.ticket]
51         query = [((k, v) if len(v) > 1 else (k, v[0])) for k, v in query.iteritems()]
52         parsed = urlparse.ParseResult(parsed.scheme, parsed.netloc,
53                                       parsed.path, parsed.params,
54                                       urllib.urlencode(query), parsed.fragment)
55         return parsed.geturl()
56
57
58 class LoginTicket(BaseTicket):
59     prefix = 'LT'
60
61     class Meta:
62         verbose_name = _('Login Ticket')
63         verbose_name_plural = _('Login Tickets')
64
65
66 class ProxyGrantingTicket(BaseTicket):
67     serviceTicket = models.ForeignKey(ServiceTicket, null=True)
68     pgtiou = models.CharField(max_length=256, verbose_name=_('PGTiou'))
69     prefix = 'PGT'
70
71     def __init__(self, *args, **kwargs):
72         if 'pgtiou' not in kwargs:
73             kwargs['pgtiou'] = u"PGTIOU-%s" % (''.join(Random().sample(string.ascii_letters + string.digits, 50)))
74         super(ProxyGrantingTicket, self).__init__(*args, **kwargs)
75
76     class Meta:
77         verbose_name = _('Proxy Granting Ticket')
78         verbose_name_plural = _('Proxy Granting Tickets')
79
80
81 class ProxyTicket(ServiceTicket):
82     proxyGrantingTicket = models.ForeignKey(ProxyGrantingTicket, verbose_name=_('Proxy Granting Ticket'))
83
84     prefix = 'PT'
85
86     class Meta:
87         verbose_name = _('Proxy Ticket')
88         verbose_name_plural = _('Proxy Tickets')
89
90
91 class ProxyGrantingTicketIOU(BaseTicket):
92     proxyGrantingTicket = models.ForeignKey(ProxyGrantingTicket, verbose_name=_('Proxy Granting Ticket'))
93
94     prefix = 'PGTIOU'
95
96     class Meta:
97         verbose_name = _('Proxy Granting Ticket IOU')
98         verbose_name_plural = _('Proxy Granting Tickets IOU')
99