root / snf-astakos-app / astakos / im / util.py @ e7726e14
History | View | Annotate | Download (11.1 kB)
1 |
# Copyright 2011-2012 GRNET S.A. All rights reserved.
|
---|---|
2 |
#
|
3 |
# Redistribution and use in source and binary forms, with or
|
4 |
# without modification, are permitted provided that the following
|
5 |
# conditions are met:
|
6 |
#
|
7 |
# 1. Redistributions of source code must retain the above
|
8 |
# copyright notice, this list of conditions and the following
|
9 |
# disclaimer.
|
10 |
#
|
11 |
# 2. Redistributions in binary form must reproduce the above
|
12 |
# copyright notice, this list of conditions and the following
|
13 |
# disclaimer in the documentation and/or other materials
|
14 |
# provided with the distribution.
|
15 |
#
|
16 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 |
# POSSIBILITY OF SUCH DAMAGE.
|
28 |
#
|
29 |
# The views and conclusions contained in the software and
|
30 |
# documentation are those of the authors and should not be
|
31 |
# interpreted as representing official policies, either expressed
|
32 |
# or implied, of GRNET S.A.
|
33 |
|
34 |
import logging |
35 |
import datetime |
36 |
import time |
37 |
import urllib |
38 |
|
39 |
from urlparse import urlparse |
40 |
from datetime import tzinfo, timedelta |
41 |
|
42 |
from django.http import HttpResponse, HttpResponseBadRequest, urlencode, \ |
43 |
HttpResponseRedirect
|
44 |
from django.template import RequestContext |
45 |
from django.contrib.auth import authenticate |
46 |
from django.core.urlresolvers import reverse |
47 |
from django.shortcuts import redirect |
48 |
from django.core.exceptions import ValidationError, ObjectDoesNotExist |
49 |
from django.utils.translation import ugettext as _ |
50 |
from django.core.urlresolvers import reverse |
51 |
|
52 |
from astakos.im.models import AstakosUser, Invitation |
53 |
from astakos.im.functions import login |
54 |
from astakos.im import settings |
55 |
|
56 |
import astakos.im.messages as astakos_messages |
57 |
|
58 |
logger = logging.getLogger(__name__) |
59 |
|
60 |
|
61 |
class UTC(tzinfo): |
62 |
def utcoffset(self, dt): |
63 |
return timedelta(0) |
64 |
|
65 |
def tzname(self, dt): |
66 |
return 'UTC' |
67 |
|
68 |
def dst(self, dt): |
69 |
return timedelta(0) |
70 |
|
71 |
|
72 |
def isoformat(d): |
73 |
"""Return an ISO8601 date string that includes a timezone."""
|
74 |
|
75 |
return d.replace(tzinfo=UTC()).isoformat()
|
76 |
|
77 |
|
78 |
def epoch(datetime): |
79 |
return int(time.mktime(datetime.timetuple()) * 1000) |
80 |
|
81 |
|
82 |
def get_context(request, extra_context=None, **kwargs): |
83 |
extra_context = extra_context or {}
|
84 |
extra_context.update(kwargs) |
85 |
return RequestContext(request, extra_context)
|
86 |
|
87 |
|
88 |
def get_invitation(request): |
89 |
"""
|
90 |
Returns the invitation identified by the ``code``.
|
91 |
|
92 |
Raises ValueError if the invitation is consumed or there is another account
|
93 |
associated with this email.
|
94 |
"""
|
95 |
code = request.GET.get('code')
|
96 |
if request.method == 'POST': |
97 |
code = request.POST.get('code')
|
98 |
if not code: |
99 |
return
|
100 |
invitation = Invitation.objects.get(code=code) |
101 |
if invitation.is_consumed:
|
102 |
raise ValueError(_(astakos_messages.INVITATION_CONSUMED_ERR)) |
103 |
if reserved_email(invitation.username):
|
104 |
email = invitation.username |
105 |
raise ValueError(_(astakos_messages.EMAIL_RESERVED) % locals()) |
106 |
return invitation
|
107 |
|
108 |
|
109 |
def restrict_next(url, domain=None, allowed_schemes=()): |
110 |
"""
|
111 |
Utility method to validate that provided url is safe to be used as the
|
112 |
redirect location of an http redirect response. The method parses the
|
113 |
provided url and identifies if it conforms CORS against provided domain
|
114 |
AND url scheme matches any of the schemes in `allowed_schemes` parameter.
|
115 |
If verirication succeeds sanitized safe url is returned. Consider using
|
116 |
the method's result in the response location header and not the originally
|
117 |
provided url. If verification fails the method returns None.
|
118 |
|
119 |
>>> print restrict_next('/im/feedback', '.okeanos.grnet.gr')
|
120 |
/im/feedback
|
121 |
>>> print restrict_next('pithos.okeanos.grnet.gr/im/feedback',
|
122 |
... '.okeanos.grnet.gr')
|
123 |
//pithos.okeanos.grnet.gr/im/feedback
|
124 |
>>> print restrict_next('https://pithos.okeanos.grnet.gr/im/feedback',
|
125 |
... '.okeanos.grnet.gr')
|
126 |
https://pithos.okeanos.grnet.gr/im/feedback
|
127 |
>>> print restrict_next('pithos://127.0.0.1', '.okeanos.grnet.gr')
|
128 |
None
|
129 |
>>> print restrict_next('pithos://127.0.0.1', '.okeanos.grnet.gr',
|
130 |
... allowed_schemes=('pithos'))
|
131 |
None
|
132 |
>>> print restrict_next('pithos://127.0.0.1', '127.0.0.1',
|
133 |
... allowed_schemes=('pithos'))
|
134 |
pithos://127.0.0.1
|
135 |
>>> print restrict_next('node1.example.com', '.okeanos.grnet.gr')
|
136 |
None
|
137 |
>>> print restrict_next('//node1.example.com', '.okeanos.grnet.gr')
|
138 |
None
|
139 |
>>> print restrict_next('https://node1.example.com', '.okeanos.grnet.gr')
|
140 |
None
|
141 |
>>> print restrict_next('https://node1.example.com')
|
142 |
https://node1.example.com
|
143 |
>>> print restrict_next('//node1.example.com')
|
144 |
//node1.example.com
|
145 |
>>> print restrict_next('node1.example.com')
|
146 |
//node1.example.com
|
147 |
>>> print restrict_next('node1.example.com', allowed_schemes=('pithos',))
|
148 |
None
|
149 |
>>> print restrict_next('pithos://localhost', 'localhost',
|
150 |
... allowed_schemes=('pithos',))
|
151 |
pithos://localhost
|
152 |
"""
|
153 |
if not url: |
154 |
return None |
155 |
|
156 |
parts = urlparse(url, scheme='http')
|
157 |
if not parts.netloc and not parts.path.startswith('/'): |
158 |
# fix url if does not conforms RFC 1808
|
159 |
url = '//%s' % url
|
160 |
parts = urlparse(url, scheme='http')
|
161 |
|
162 |
if not domain and not allowed_schemes: |
163 |
return url
|
164 |
|
165 |
# domain validation
|
166 |
if domain:
|
167 |
if not parts.netloc: |
168 |
return url
|
169 |
if parts.netloc.endswith(domain):
|
170 |
return url
|
171 |
else:
|
172 |
return None |
173 |
|
174 |
# scheme validation
|
175 |
if allowed_schemes:
|
176 |
if parts.scheme in allowed_schemes: |
177 |
return url
|
178 |
|
179 |
return None |
180 |
|
181 |
|
182 |
def prepare_response(request, user, next='', renew=False): |
183 |
"""Return the unique username and the token
|
184 |
as 'X-Auth-User' and 'X-Auth-Token' headers,
|
185 |
or redirect to the URL provided in 'next'
|
186 |
with the 'user' and 'token' as parameters.
|
187 |
|
188 |
Reissue the token even if it has not yet
|
189 |
expired, if the 'renew' parameter is present
|
190 |
or user has not a valid token.
|
191 |
"""
|
192 |
renew = renew or (not user.auth_token) |
193 |
renew = renew or user.token_expired()
|
194 |
if renew:
|
195 |
user.renew_token( |
196 |
flush_sessions=True,
|
197 |
current_key=request.session.session_key |
198 |
) |
199 |
try:
|
200 |
user.save() |
201 |
except ValidationError, e:
|
202 |
return HttpResponseBadRequest(e)
|
203 |
|
204 |
next = restrict_next(next, domain=settings.COOKIE_DOMAIN)
|
205 |
|
206 |
if settings.FORCE_PROFILE_UPDATE and \ |
207 |
not user.is_verified and not user.is_superuser: |
208 |
params = ''
|
209 |
if next: |
210 |
params = '?' + urlencode({'next': next}) |
211 |
next = reverse('edit_profile') + params
|
212 |
|
213 |
response = HttpResponse() |
214 |
|
215 |
# authenticate before login
|
216 |
user = authenticate(email=user.email, auth_token=user.auth_token) |
217 |
login(request, user) |
218 |
request.session.set_expiry(user.auth_token_expires) |
219 |
|
220 |
if not next: |
221 |
next = settings.LOGIN_SUCCESS_URL |
222 |
|
223 |
response['Location'] = next |
224 |
response.status_code = 302
|
225 |
return response
|
226 |
|
227 |
class lazy_string(object): |
228 |
def __init__(self, function, *args, **kwargs): |
229 |
self.function = function
|
230 |
self.args = args
|
231 |
self.kwargs = kwargs
|
232 |
|
233 |
def __str__(self): |
234 |
if not hasattr(self, 'str'): |
235 |
self.str = self.function(*self.args, **self.kwargs) |
236 |
return self.str |
237 |
|
238 |
|
239 |
def reverse_lazy(*args, **kwargs): |
240 |
return lazy_string(reverse, *args, **kwargs)
|
241 |
|
242 |
|
243 |
def reserved_email(email): |
244 |
return AstakosUser.objects.user_exists(email)
|
245 |
|
246 |
|
247 |
def reserved_verified_email(email): |
248 |
return AstakosUser.objects.verified_user_exists(email)
|
249 |
|
250 |
|
251 |
def get_query(request): |
252 |
try:
|
253 |
return request.__getattribute__(request.method)
|
254 |
except AttributeError: |
255 |
return {}
|
256 |
|
257 |
def get_properties(obj): |
258 |
def get_class_attr(_class, attr): |
259 |
try:
|
260 |
return getattr(_class, attr) |
261 |
except AttributeError: |
262 |
return
|
263 |
|
264 |
return (i for i in vars(obj.__class__) \ |
265 |
if isinstance(get_class_attr(obj.__class__, i), property)) |
266 |
|
267 |
def model_to_dict(obj, exclude=None, include_empty=True): |
268 |
'''
|
269 |
serialize model object to dict with related objects
|
270 |
|
271 |
author: Vadym Zakovinko <vp@zakovinko.com>
|
272 |
date: January 31, 2011
|
273 |
http://djangosnippets.org/snippets/2342/
|
274 |
'''
|
275 |
|
276 |
if exclude is None: |
277 |
exclude = ['AutoField', 'ForeignKey', 'OneToOneField'] |
278 |
tree = {} |
279 |
for field_name in obj._meta.get_all_field_names(): |
280 |
try:
|
281 |
field = getattr(obj, field_name)
|
282 |
except (ObjectDoesNotExist, AttributeError): |
283 |
continue
|
284 |
|
285 |
if field.__class__.__name__ in ['RelatedManager', 'ManyRelatedManager']: |
286 |
if field.model.__name__ in exclude: |
287 |
continue
|
288 |
|
289 |
if field.__class__.__name__ == 'ManyRelatedManager': |
290 |
exclude.append(obj.__class__.__name__) |
291 |
subtree = [] |
292 |
for related_obj in getattr(obj, field_name).all(): |
293 |
value = model_to_dict(related_obj, exclude=exclude) |
294 |
if value or include_empty: |
295 |
subtree.append(value) |
296 |
if subtree or include_empty: |
297 |
tree[field_name] = subtree |
298 |
continue
|
299 |
|
300 |
field = obj._meta.get_field_by_name(field_name)[0]
|
301 |
if field.__class__.__name__ in exclude: |
302 |
continue
|
303 |
|
304 |
if field.__class__.__name__ == 'RelatedObject': |
305 |
exclude.append(field.model.__name__) |
306 |
tree[field_name] = model_to_dict(getattr(obj, field_name),
|
307 |
exclude=exclude) |
308 |
continue
|
309 |
|
310 |
value = getattr(obj, field_name)
|
311 |
if field.__class__.__name__ == 'ForeignKey': |
312 |
value = unicode(value) if value is not None else value |
313 |
if value or include_empty: |
314 |
tree[field_name] = value |
315 |
properties = list(get_properties(obj))
|
316 |
for p in properties: |
317 |
tree[p] = getattr(obj, p)
|
318 |
tree['str_repr'] = obj.__str__()
|
319 |
|
320 |
return tree
|
321 |
|
322 |
def login_url(request): |
323 |
attrs = {} |
324 |
for attr in ['login', 'key', 'code']: |
325 |
val = request.REQUEST.get(attr, None)
|
326 |
if val:
|
327 |
attrs[attr] = val |
328 |
return "%s?%s" % (reverse('login'), urllib.urlencode(attrs)) |
329 |
|
330 |
|
331 |
def redirect_back(request, default='index'): |
332 |
"""
|
333 |
Redirect back to referer if safe and possible.
|
334 |
"""
|
335 |
referer = request.META.get('HTTP_REFERER')
|
336 |
|
337 |
safedomain = settings.BASE_URL.replace("https://", "").replace( |
338 |
"http://", "") |
339 |
safe = restrict_next(referer, safedomain) |
340 |
# avoid redirect loop
|
341 |
loops = referer == request.get_full_path() |
342 |
if referer and safe and not loops: |
343 |
return redirect(referer)
|
344 |
return redirect(reverse(default))
|