root / invitations / invitations.py @ d53bbf68
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1 | f1bb3880 | Georgios Gousios | # vim: set fileencoding=utf-8 :
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2 | 48130e66 | Georgios Gousios | # Copyright 2011 GRNET S.A. All rights reserved.
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3 | 48130e66 | Georgios Gousios | #
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4 | 48130e66 | Georgios Gousios | # Redistribution and use in source and binary forms, with or without
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5 | 48130e66 | Georgios Gousios | # modification, are permitted provided that the following conditions
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6 | 48130e66 | Georgios Gousios | # are met:
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7 | 48130e66 | Georgios Gousios | #
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8 | 48130e66 | Georgios Gousios | # 1. Redistributions of source code must retain the above copyright
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9 | 48130e66 | Georgios Gousios | # notice, this list of conditions and the following disclaimer.
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10 | 48130e66 | Georgios Gousios | #
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11 | 48130e66 | Georgios Gousios | # 2. Redistributions in binary form must reproduce the above copyright
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12 | 48130e66 | Georgios Gousios | # notice, this list of conditions and the following disclaimer in the
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13 | 48130e66 | Georgios Gousios | # documentation and/or other materials provided with the distribution.
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14 | 48130e66 | Georgios Gousios | #
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15 | 48130e66 | Georgios Gousios | # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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16 | 48130e66 | Georgios Gousios | # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 | 48130e66 | Georgios Gousios | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 | 48130e66 | Georgios Gousios | # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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19 | 48130e66 | Georgios Gousios | # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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20 | 48130e66 | Georgios Gousios | # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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21 | 48130e66 | Georgios Gousios | # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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22 | 48130e66 | Georgios Gousios | # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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23 | 48130e66 | Georgios Gousios | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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24 | 48130e66 | Georgios Gousios | # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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25 | 48130e66 | Georgios Gousios | # SUCH DAMAGE.
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26 | 48130e66 | Georgios Gousios | #
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27 | 48130e66 | Georgios Gousios | # The views and conclusions contained in the software and documentation are
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28 | 48130e66 | Georgios Gousios | # those of the authors and should not be interpreted as representing official
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29 | 48130e66 | Georgios Gousios | # policies, either expressed or implied, of GRNET S.A.
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30 | 48130e66 | Georgios Gousios | |
31 | 48130e66 | Georgios Gousios | |
32 | e6d6603a | Georgios Gousios | from datetime import timedelta |
33 | e6d6603a | Georgios Gousios | import base64 |
34 | 3b09ff22 | Georgios Gousios | import time |
35 | 3b09ff22 | Georgios Gousios | import urllib |
36 | e6d6603a | Georgios Gousios | |
37 | 03e70572 | Georgios Gousios | from django.conf import settings |
38 | 566cd8b2 | Georgios Gousios | from django.core.exceptions import ValidationError |
39 | 03e70572 | Georgios Gousios | from django.db import transaction |
40 | 03e70572 | Georgios Gousios | from django.http import HttpResponse, HttpResponseRedirect |
41 | a640b50d | Georgios Gousios | from django.template.context import RequestContext |
42 | 2a0eee64 | Georgios Gousios | from django.template.loader import render_to_string |
43 | 566cd8b2 | Georgios Gousios | from django.core.validators import validate_email |
44 | a640b50d | Georgios Gousios | from django.views.decorators.csrf import csrf_protect |
45 | b6b88056 | Kostas Papadimitriou | from django.utils.translation import ugettext as _ |
46 | 566cd8b2 | Georgios Gousios | |
47 | d028ab18 | Georgios Gousios | from synnefo.logic.email_send import send_async |
48 | 03e70572 | Georgios Gousios | from synnefo.api.common import method_not_allowed |
49 | 03e70572 | Georgios Gousios | from synnefo.db.models import Invitations, SynnefoUser |
50 | d028ab18 | Georgios Gousios | from synnefo.logic import users, log |
51 | e6d6603a | Georgios Gousios | |
52 | e6d6603a | Georgios Gousios | from Crypto.Cipher import AES |
53 | 03e70572 | Georgios Gousios | |
54 | d028ab18 | Georgios Gousios | _logger = log.get_logger("synnefo.invitations")
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55 | f1bb3880 | Georgios Gousios | |
56 | e6d6603a | Georgios Gousios | def process_form(request): |
57 | a640b50d | Georgios Gousios | errors = [] |
58 | 566cd8b2 | Georgios Gousios | valid_inv = filter(lambda x: x.startswith("name_"), request.POST.keys()) |
59 | 566cd8b2 | Georgios Gousios | |
60 | 566cd8b2 | Georgios Gousios | for inv in valid_inv: |
61 | 566cd8b2 | Georgios Gousios | (name, inv_id) = inv.split('_')
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62 | 566cd8b2 | Georgios Gousios | |
63 | 05310288 | Georgios Gousios | email = ""
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64 | 05310288 | Georgios Gousios | name = ""
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65 | 566cd8b2 | Georgios Gousios | try:
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66 | 566cd8b2 | Georgios Gousios | email = request.POST['email_' + inv_id]
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67 | 566cd8b2 | Georgios Gousios | name = request.POST[inv] |
68 | 566cd8b2 | Georgios Gousios | |
69 | 566cd8b2 | Georgios Gousios | validate_name(name) |
70 | a640b50d | Georgios Gousios | validate_email(email) |
71 | a640b50d | Georgios Gousios | |
72 | e6d6603a | Georgios Gousios | inv = add_invitation(request.user, name, email) |
73 | 3b09ff22 | Georgios Gousios | send_invitation(inv) |
74 | a640b50d | Georgios Gousios | |
75 | d028ab18 | Georgios Gousios | # FIXME: Delete invitation and user on error
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76 | d028ab18 | Georgios Gousios | except (InvitationException, ValidationError) as e: |
77 | d028ab18 | Georgios Gousios | errors += ["Invitation to %s <%s> not sent. Reason: %s" %
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78 | b6b88056 | Kostas Papadimitriou | (name, email, e.messages[0])]
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79 | 566cd8b2 | Georgios Gousios | except Exception as e: |
80 | d028ab18 | Georgios Gousios | _logger.exception(e) |
81 | d028ab18 | Georgios Gousios | errors += ["Invitation to %s <%s> not sent. Reason: %s" %
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82 | d028ab18 | Georgios Gousios | (name, email, e.message)] |
83 | a640b50d | Georgios Gousios | |
84 | a640b50d | Georgios Gousios | respose = None
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85 | a640b50d | Georgios Gousios | if errors:
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86 | a640b50d | Georgios Gousios | data = render_to_string('invitations.html',
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87 | a640b50d | Georgios Gousios | {'invitations': invitations_for_user(request),
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88 | 8f50f91c | Kostas Papadimitriou | 'errors': errors,
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89 | eabbd5b7 | Kostas Papadimitriou | 'ajax': True, |
90 | 8f50f91c | Kostas Papadimitriou | 'invitations_left': get_invitations_left(request.user)
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91 | 8f50f91c | Kostas Papadimitriou | }, |
92 | a640b50d | Georgios Gousios | context_instance=RequestContext(request)) |
93 | a640b50d | Georgios Gousios | response = HttpResponse(data) |
94 | 25c36228 | Georgios Gousios | _logger.warn("Error adding invitation %s -> %s: %s"%(request.user.uniq,
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95 | 25c36228 | Georgios Gousios | email, errors)) |
96 | a640b50d | Georgios Gousios | else:
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97 | a640b50d | Georgios Gousios | response = HttpResponseRedirect("/invitations/")
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98 | 25c36228 | Georgios Gousios | _logger.info("Added invitation %s -> %s"%(request.user.uniq, email))
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99 | 566cd8b2 | Georgios Gousios | |
100 | 566cd8b2 | Georgios Gousios | return response
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101 | 566cd8b2 | Georgios Gousios | |
102 | f1bb3880 | Georgios Gousios | |
103 | 566cd8b2 | Georgios Gousios | def validate_name(name): |
104 | 68a77896 | Georgios Gousios | if name is None or name.strip() == '': |
105 | a640b50d | Georgios Gousios | raise ValidationError("Name is empty") |
106 | a640b50d | Georgios Gousios | |
107 | a640b50d | Georgios Gousios | if name.find(' ') is -1: |
108 | b6b88056 | Kostas Papadimitriou | raise ValidationError(_("Name must contain at least one space")) |
109 | 03e70572 | Georgios Gousios | |
110 | 566cd8b2 | Georgios Gousios | return True |
111 | 566cd8b2 | Georgios Gousios | |
112 | f1bb3880 | Georgios Gousios | |
113 | 566cd8b2 | Georgios Gousios | def invitations_for_user(request): |
114 | 566cd8b2 | Georgios Gousios | invitations = [] |
115 | 566cd8b2 | Georgios Gousios | |
116 | 566cd8b2 | Georgios Gousios | for inv in Invitations.objects.filter(source = request.user): |
117 | e6d6603a | Georgios Gousios | invitation = {} |
118 | 566cd8b2 | Georgios Gousios | |
119 | e6d6603a | Georgios Gousios | invitation['sourcename'] = inv.source.realname
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120 | e6d6603a | Georgios Gousios | invitation['source'] = inv.source.uniq
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121 | e6d6603a | Georgios Gousios | invitation['targetname'] = inv.target.realname
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122 | e6d6603a | Georgios Gousios | invitation['target'] = inv.target.uniq
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123 | e6d6603a | Georgios Gousios | invitation['accepted'] = inv.accepted
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124 | e6d6603a | Georgios Gousios | invitation['sent'] = inv.created
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125 | 566cd8b2 | Georgios Gousios | |
126 | e6d6603a | Georgios Gousios | invitations.append(invitation) |
127 | 566cd8b2 | Georgios Gousios | |
128 | e6d6603a | Georgios Gousios | return invitations
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129 | 03e70572 | Georgios Gousios | |
130 | f1bb3880 | Georgios Gousios | |
131 | a640b50d | Georgios Gousios | @csrf_protect
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132 | 03e70572 | Georgios Gousios | def inv_demux(request): |
133 | 3b09ff22 | Georgios Gousios | |
134 | 03e70572 | Georgios Gousios | if request.method == 'GET': |
135 | 566cd8b2 | Georgios Gousios | data = render_to_string('invitations.html',
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136 | 8f50f91c | Kostas Papadimitriou | {'invitations': invitations_for_user(request),
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137 | 8f50f91c | Kostas Papadimitriou | 'ajax': request.is_ajax(),
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138 | 8f50f91c | Kostas Papadimitriou | 'invitations_left': get_invitations_left(request.user)
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139 | 8f50f91c | Kostas Papadimitriou | }, |
140 | a640b50d | Georgios Gousios | context_instance=RequestContext(request)) |
141 | 03e70572 | Georgios Gousios | return HttpResponse(data)
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142 | 03e70572 | Georgios Gousios | elif request.method == 'POST': |
143 | e6d6603a | Georgios Gousios | return process_form(request)
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144 | 03e70572 | Georgios Gousios | else:
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145 | 03e70572 | Georgios Gousios | method_not_allowed(request) |
146 | 03e70572 | Georgios Gousios | |
147 | 33e00f02 | Georgios Gousios | |
148 | 3b09ff22 | Georgios Gousios | def login(request): |
149 | 3b09ff22 | Georgios Gousios | |
150 | 3b09ff22 | Georgios Gousios | if not request.method == 'GET': |
151 | 3b09ff22 | Georgios Gousios | method_not_allowed(request) |
152 | 3b09ff22 | Georgios Gousios | |
153 | 3b09ff22 | Georgios Gousios | key = request.GET['key']
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154 | 3b09ff22 | Georgios Gousios | |
155 | 3b09ff22 | Georgios Gousios | if key is None: |
156 | 914502af | Georgios Gousios | return render_login_error("10", "Required key is missing") |
157 | 3b09ff22 | Georgios Gousios | |
158 | 3b09ff22 | Georgios Gousios | PADDING = '{'
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159 | 3b09ff22 | Georgios Gousios | |
160 | 68a77896 | Georgios Gousios | try:
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161 | 914502af | Georgios Gousios | DecodeAES = lambda c, e: c.decrypt(base64.b64decode(e)).rstrip(PADDING)
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162 | 914502af | Georgios Gousios | cipher = AES.new(settings.INVITATION_ENCR_KEY) |
163 | 914502af | Georgios Gousios | decoded = DecodeAES(cipher, key) |
164 | 914502af | Georgios Gousios | except Exception: |
165 | 914502af | Georgios Gousios | return render_login_error("20", "Required key is invalid") |
166 | 3b09ff22 | Georgios Gousios | |
167 | 3b09ff22 | Georgios Gousios | users = SynnefoUser.objects.filter(auth_token = decoded) |
168 | 3b09ff22 | Georgios Gousios | |
169 | 3b09ff22 | Georgios Gousios | if users.count() is 0: |
170 | 914502af | Georgios Gousios | return render_login_error("20", "Required key is invalid") |
171 | 3b09ff22 | Georgios Gousios | |
172 | 3b09ff22 | Georgios Gousios | user = users[0]
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173 | 3b09ff22 | Georgios Gousios | invitations = Invitations.objects.filter(target = user) |
174 | 3b09ff22 | Georgios Gousios | |
175 | 3b09ff22 | Georgios Gousios | if invitations.count() is 0: |
176 | 914502af | Georgios Gousios | return render_login_error("30", "Non-existent invitation") |
177 | f1bb3880 | Georgios Gousios | |
178 | 3b09ff22 | Georgios Gousios | inv = invitations[0]
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179 | 3b09ff22 | Georgios Gousios | |
180 | 3b09ff22 | Georgios Gousios | valid = timedelta(days = settings.INVITATION_VALID_DAYS) |
181 | 3b09ff22 | Georgios Gousios | valid_until = inv.created + valid |
182 | 3b09ff22 | Georgios Gousios | |
183 | 3b09ff22 | Georgios Gousios | if (time.time() -
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184 | 3b09ff22 | Georgios Gousios | time.mktime(inv.created.timetuple()) - |
185 | 3b09ff22 | Georgios Gousios | settings.INVITATION_VALID_DAYS * 3600) > 0: |
186 | 914502af | Georgios Gousios | return render_login_error("40", |
187 | 914502af | Georgios Gousios | "Invitation expired (was valid until %s)"%
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188 | 914502af | Georgios Gousios | valid_until.strftime('%A, %d %B %Y'))
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189 | 914502af | Georgios Gousios | #if inv.accepted == False:
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190 | 914502af | Georgios Gousios | # return render_login_error("60", "Invitation already accepted")
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191 | 3b09ff22 | Georgios Gousios | |
192 | 3b09ff22 | Georgios Gousios | inv.accepted = True
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193 | 3b09ff22 | Georgios Gousios | inv.save() |
194 | 3b09ff22 | Georgios Gousios | |
195 | 25c36228 | Georgios Gousios | _logger.info("Invited user %s logged in"%(inv.target.uniq))
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196 | 25c36228 | Georgios Gousios | |
197 | 914502af | Georgios Gousios | data = dict()
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198 | 914502af | Georgios Gousios | data['user'] = user.realname
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199 | 914502af | Georgios Gousios | data['url'] = settings.APP_INSTALL_URL
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200 | 914502af | Georgios Gousios | |
201 | 914502af | Georgios Gousios | welcome = render_to_string('welcome.html', {'data': data}) |
202 | 914502af | Georgios Gousios | |
203 | 914502af | Georgios Gousios | response = HttpResponse(welcome) |
204 | 3b09ff22 | Georgios Gousios | |
205 | 3b09ff22 | Georgios Gousios | response.set_cookie('X-Auth-Token', value=user.auth_token,
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206 | 3b09ff22 | Georgios Gousios | expires = valid_until.strftime('%a, %d-%b-%Y %H:%M:%S %Z'),
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207 | 3b09ff22 | Georgios Gousios | path='/')
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208 | 3b09ff22 | Georgios Gousios | response['X-Auth-Token'] = user.auth_token
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209 | 914502af | Georgios Gousios | return response
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210 | 914502af | Georgios Gousios | |
211 | 914502af | Georgios Gousios | |
212 | 914502af | Georgios Gousios | def render_login_error(code, text): |
213 | 914502af | Georgios Gousios | error = dict()
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214 | 914502af | Georgios Gousios | error['id'] = code
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215 | 914502af | Georgios Gousios | error['text'] = text
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216 | 914502af | Georgios Gousios | |
217 | 914502af | Georgios Gousios | data = render_to_string('error.html', {'error': error}) |
218 | 914502af | Georgios Gousios | |
219 | 914502af | Georgios Gousios | response = HttpResponse(data) |
220 | 3b09ff22 | Georgios Gousios | return response
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221 | 3b09ff22 | Georgios Gousios | |
222 | 3b09ff22 | Georgios Gousios | |
223 | 3b09ff22 | Georgios Gousios | def send_invitation(invitation): |
224 | e6d6603a | Georgios Gousios | email = {} |
225 | e6d6603a | Georgios Gousios | email['invitee'] = invitation.target.realname
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226 | e6d6603a | Georgios Gousios | email['inviter'] = invitation.source.realname
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227 | e6d6603a | Georgios Gousios | |
228 | e6d6603a | Georgios Gousios | valid = timedelta(days = settings.INVITATION_VALID_DAYS) |
229 | e6d6603a | Georgios Gousios | valid_until = invitation.created + valid |
230 | e6d6603a | Georgios Gousios | email['valid_until'] = valid_until.strftime('%A, %d %B %Y') |
231 | e6d6603a | Georgios Gousios | |
232 | e6d6603a | Georgios Gousios | PADDING = '{'
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233 | e6d6603a | Georgios Gousios | pad = lambda s: s + (32 - len(s) % 32) * PADDING |
234 | e6d6603a | Georgios Gousios | EncodeAES = lambda c, s: base64.b64encode(c.encrypt(pad(s)))
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235 | e6d6603a | Georgios Gousios | |
236 | e6d6603a | Georgios Gousios | cipher = AES.new(settings.INVITATION_ENCR_KEY) |
237 | e6d6603a | Georgios Gousios | encoded = EncodeAES(cipher, invitation.target.auth_token) |
238 | e6d6603a | Georgios Gousios | |
239 | 3b09ff22 | Georgios Gousios | url_safe = urllib.urlencode({'key': encoded})
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240 | 3b09ff22 | Georgios Gousios | |
241 | 3b09ff22 | Georgios Gousios | email['url'] = settings.APP_INSTALL_URL + "/invitations/login?" + url_safe |
242 | e6d6603a | Georgios Gousios | |
243 | e6d6603a | Georgios Gousios | data = render_to_string('invitation.txt', {'email': email}) |
244 | 3b09ff22 | Georgios Gousios | |
245 | 844ff4db | Georgios Gousios | _logger.debug("Invitation URL: %s" % email['url']) |
246 | 844ff4db | Georgios Gousios | |
247 | f1bb3880 | Georgios Gousios | send_async( |
248 | 3d3c58d7 | Georgios Gousios | frm = "%s"%(settings.DEFAULT_FROM_EMAIL),
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249 | f1bb3880 | Georgios Gousios | to = "%s <%s>"%(invitation.target.realname,invitation.target.uniq),
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250 | 68a77896 | Georgios Gousios | subject = _('Invitation to IaaS service Okeanos'),
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251 | f1bb3880 | Georgios Gousios | body = data |
252 | f1bb3880 | Georgios Gousios | ) |
253 | f1bb3880 | Georgios Gousios | |
254 | 9f8ad4c5 | Georgios Gousios | def get_invitee_level(source): |
255 | 9f8ad4c5 | Georgios Gousios | return get_user_inv_level(source) + 1 |
256 | 9f8ad4c5 | Georgios Gousios | |
257 | 9f8ad4c5 | Georgios Gousios | |
258 | 9f8ad4c5 | Georgios Gousios | def get_user_inv_level(u): |
259 | 9f8ad4c5 | Georgios Gousios | inv = Invitations.objects.filter(target = u) |
260 | 9f8ad4c5 | Georgios Gousios | |
261 | cf8482f2 | Giorgos Verigakis | if not inv: |
262 | 9f8ad4c5 | Georgios Gousios | raise Exception("User without invitation", u) |
263 | 9f8ad4c5 | Georgios Gousios | |
264 | 9f8ad4c5 | Georgios Gousios | return inv[0].level |
265 | 9f8ad4c5 | Georgios Gousios | |
266 | 9f8ad4c5 | Georgios Gousios | |
267 | 03e70572 | Georgios Gousios | @transaction.commit_on_success
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268 | 03e70572 | Georgios Gousios | def add_invitation(source, name, email): |
269 | 03e70572 | Georgios Gousios | """
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270 | 03e70572 | Georgios Gousios | Adds an invitation, if the source user has not gone over his/her
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271 | 33e00f02 | Georgios Gousios | invitation limit or the target user has not been invited already
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272 | 03e70572 | Georgios Gousios | """
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273 | 03e70572 | Georgios Gousios | num_inv = Invitations.objects.filter(source = source).count() |
274 | 03e70572 | Georgios Gousios | |
275 | 33e00f02 | Georgios Gousios | if num_inv >= source.max_invitations:
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276 | d652580d | Georgios Gousios | raise TooManyInvitations("User invitation limit (%d) exhausted" % |
277 | 33e00f02 | Georgios Gousios | source.max_invitations) |
278 | 03e70572 | Georgios Gousios | |
279 | f1bb3880 | Georgios Gousios | target = SynnefoUser.objects.filter(uniq = email) |
280 | 03e70572 | Georgios Gousios | |
281 | 03e70572 | Georgios Gousios | if target.count() is not 0: |
282 | f1bb3880 | Georgios Gousios | raise AlreadyInvited("User with email %s already invited" % (email)) |
283 | 03e70572 | Georgios Gousios | |
284 | 53e6717b | Georgios Gousios | users.register_user(name, email) |
285 | 53e6717b | Georgios Gousios | |
286 | 53e6717b | Georgios Gousios | target = SynnefoUser.objects.filter(uniq = email) |
287 | 53e6717b | Georgios Gousios | |
288 | 53e6717b | Georgios Gousios | r = list(target[:1]) |
289 | 53e6717b | Georgios Gousios | if not r: |
290 | bd1548a7 | Georgios Gousios | raise Exception("Invited user cannot be added") |
291 | 03e70572 | Georgios Gousios | |
292 | 9f8ad4c5 | Georgios Gousios | u = target[0]
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293 | 9f8ad4c5 | Georgios Gousios | invitee_level = get_invitee_level(source) |
294 | 9f8ad4c5 | Georgios Gousios | |
295 | 9f8ad4c5 | Georgios Gousios | u.max_invitations = settings.INVITATIONS_PER_LEVEL[invitee_level] |
296 | 9f8ad4c5 | Georgios Gousios | u.save() |
297 | 9f8ad4c5 | Georgios Gousios | |
298 | 03e70572 | Georgios Gousios | inv = Invitations() |
299 | 03e70572 | Georgios Gousios | inv.source = source |
300 | 9f8ad4c5 | Georgios Gousios | inv.target = u |
301 | 9f8ad4c5 | Georgios Gousios | inv.level = invitee_level |
302 | 03e70572 | Georgios Gousios | inv.save() |
303 | e6d6603a | Georgios Gousios | return inv
|
304 | 03e70572 | Georgios Gousios | |
305 | f1bb3880 | Georgios Gousios | |
306 | 03e70572 | Georgios Gousios | @transaction.commit_on_success
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307 | 03e70572 | Georgios Gousios | def invitation_accepted(invitation): |
308 | 03e70572 | Georgios Gousios | """
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309 | 03e70572 | Georgios Gousios | Mark an invitation as accepted
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310 | 03e70572 | Georgios Gousios | """
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311 | 03e70572 | Georgios Gousios | invitation.accepted = True
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312 | 03e70572 | Georgios Gousios | invitation.save() |
313 | 03e70572 | Georgios Gousios | |
314 | 8f50f91c | Kostas Papadimitriou | |
315 | 8f50f91c | Kostas Papadimitriou | def get_invitations_left(user): |
316 | 8f50f91c | Kostas Papadimitriou | """
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317 | 8f50f91c | Kostas Papadimitriou | Get user invitations left
|
318 | 8f50f91c | Kostas Papadimitriou | """
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319 | 8f50f91c | Kostas Papadimitriou | num_inv = Invitations.objects.filter(source = user).count() |
320 | 8f50f91c | Kostas Papadimitriou | return user.max_invitations - num_inv
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321 | 8f50f91c | Kostas Papadimitriou | |
322 | d028ab18 | Georgios Gousios | class InvitationException(Exception): |
323 | a640b50d | Georgios Gousios | def __init__(self, msg): |
324 | d53bbf68 | Georgios Gousios | self.messages = [msg]
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325 | 03e70572 | Georgios Gousios | |
326 | d53bbf68 | Georgios Gousios | class TooManyInvitations(InvitationException): |
327 | d53bbf68 | Georgios Gousios | pass
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328 | 03e70572 | Georgios Gousios | |
329 | d028ab18 | Georgios Gousios | class AlreadyInvited(InvitationException): |
330 | d53bbf68 | Georgios Gousios | pass |