annotate src/plugins/plugin_misc_invitations.py @ 2208:c316c6f6a737

plugin invitations: fixed leak of uuid in jid
author Goffi <goffi@goffi.org>
date Sun, 26 Mar 2017 21:23:03 +0200
parents dd53d7a3219a
children f8d61592f1fc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for file tansfer
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5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from sat.core.i18n import _, D_
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21 from sat.core.constants import Const as C
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22 from sat.core import exceptions
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23 from sat.core.log import getLogger
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24 log = getLogger(__name__)
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25 import shortuuid
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26 from sat.tools import utils
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27 from twisted.internet import defer
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28 from twisted.words.protocols.jabber import jid
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29 from twisted.words.protocols.jabber import error
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30 from sat.memory import persistent
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31 from sat.tools import email as sat_email
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32
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33
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34 PLUGIN_INFO = {
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35 C.PI_NAME: "Invitations",
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36 C.PI_IMPORT_NAME: "INVITATIONS",
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37 C.PI_TYPE: C.PLUG_TYPE_MISC,
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38 C.PI_DEPENDENCIES: ['XEP-0077'],
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39 C.PI_MAIN: "InvitationsPlugin",
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40 C.PI_HANDLER: "no",
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41 C.PI_DESCRIPTION: _(u"""invitation of people without XMPP account""")
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42 }
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43
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44
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45 SUFFIX_MAX = 5
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46 INVITEE_PROFILE_TPL = u"guest@@{uuid}"
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47 KEY_CREATED = u'created'
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48 KEY_LAST_CONNECTION = u'last_connection'
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49 EXTRA_RESERVED = {KEY_CREATED, u'jid_', u'jid', KEY_LAST_CONNECTION}
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50 DEFAULT_SUBJECT = D_(u"You have been invited by {host_name} to {app_name}")
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51 DEFAULT_BODY = D_(u"""Hello {name}!
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52
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53 You have received an invitation from {host_name} to participate to "{app_name}".
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54 To join, you just have to click on the following URL:
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55 {url}
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56
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57 Please note that this URL should not be shared with anybody!
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58 If you want more details on {app_name}, you can check {app_url}.
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59
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60 Welcome!
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61 """)
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62
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63
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64 class InvitationsPlugin(object):
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65
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66 def __init__(self, host):
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67 log.info(_(u"plugin Invitations initialization"))
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68 self.host = host
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69 self.invitations = persistent.LazyPersistentBinaryDict(u'invitations')
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70 host.bridge.addMethod("invitationCreate", ".plugin", in_sign='sssssssssa{ss}s', out_sign='(sa{ss})',
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71 method=self._createInvitation,
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72 async=True)
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73 def _createInvitation(self, jid_=u'', password=u'', name=u'', host_name=u'', email=u'', language=u'', url_template=u'', message_subject=u'', message_body=u'', extra=None, profile=u''):
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74 # XXX: we don't use **kwargs here to keep arguments name for introspection with D-Bus bridge
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75
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76 if extra is None:
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77 extra = {}
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78 else:
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79 extra = {unicode(k): unicode(v) for k,v in extra.iteritems()}
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80
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81 # we need to be sure that values are unicode, else they won't be pickled correctly with D-Bus
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82 kwargs = {"extra": extra}
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83 for key in ("jid_", "password", "name", "host_name", "email", "language", "url_template", "message_subject", "message_body", "profile"):
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84 value = locals()[key]
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85 if value:
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86 kwargs[key] = unicode(value)
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87 return self.createInvitation(**kwargs)
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88
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89 @defer.inlineCallbacks
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90 def createInvitation(self, **kwargs):
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91 ur"""create an invitation
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92
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93 this will create an XMPP account and a profile, and use a UUID to retrieve them.
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94 the profile is automatically generated in the form guest@@[UUID], this way they can be retrieved easily
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95 **kwargs: keywords arguments which can have the following keys, unset values are equivalent to None:
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96 jid_(jid.JID, None): jid to use for invitation, the jid will be created using XEP-0077
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97 if the jid has no user part, an anonymous account will be used (no XMPP account created in this case)
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98 if None, automatically generate an account name (in the form "invitation-[random UUID]@domain.tld") (note that this UUID is not the
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99 same as the invitation one, as jid can be used publicly (leaking the UUID), and invitation UUID give access to account.
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100 in case of conflict, a suffix number is added to the account until a free one if found (with a failure if SUFFIX_MAX is reached)
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101 password(unicode, None): password to use (will be used for XMPP account and profile)
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102 None to automatically generate one
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103 name(unicode, None): name of the invitee
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104 host_name(unicode, None): name of the host
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105 email(unicode, None): email to send the invitation to
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106 if None, no invitation email is sent, you can still associate email using extra
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107 if email is used, extra can't have "email" key
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108 language(unicode): language of the invitee (used notabily to translate the invitation)
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109 TODO: not used yet
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110 url_template(unicode, None): template to use to construct the invitation URL
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111 use {uuid} as a placeholder for identifier
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112 use None if you don't want to include URL (or if it is already specified in custom message)
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113 /!\ you must put full URL, don't forget https://
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114 /!\ the URL will give access to the invitee account, you should warn in message to not publish it publicly
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115 message_subject(unicode, None): customised message body for t:o he invitation email
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116 None to use default subject
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117 uses the same substitution as for message_body
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118 message_body(unicode, None): customised message body for the invitation email
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119 None to use default body
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120 use {name} as a place holder for invitee name
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121 use {url} as a placeholder for the invitation url
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122 use {uuid} as a placeholder for the identifier
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123 use {app_name} as a placeholder for this software name
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124 use {app_url} as a placeholder for this software official website
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125 use {profile} as a placeholder for host's profile
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126 use {host_name} as a placeholder for host's name
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127 extra(dict, None): extra data to associate with the invitee
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128 some keys are reserved:
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129 - created (creation date)
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130 if email argument is used, "email" key can't be used
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131 profile(unicode, None): profile of the host (person who is inviting)
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132 @return (unicode, dict[unicode, unicode]): tuple with:
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133 - UUID associated with the invitee
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134 - filled extra dictionary, as saved in the databae
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135 """
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136 ## initial checks
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137 extra = kwargs.pop('extra', {})
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138 if set(kwargs).intersection(extra):
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139 raise exceptions.ValueError(_(u"You can't use following key(s) in both args and extra: {}").format(
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140 u', '.join(set(kwargs).intersection(extra))))
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141
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142 if EXTRA_RESERVED.intersection(extra):
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143 raise exceptions.ValueError(_(u"You can't use following key(s) in extra, they are reserved: {}").format(
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144 u', '.join(EXTRA_RESERVED.intersection(extra))))
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145
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146 ## uuid
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147 log.info(_(u"creating an invitation"))
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148 id_ = unicode(shortuuid.uuid())
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149
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150 ## XMPP account creation
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151 password = kwargs.pop(u'password', None)
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152 if password is None:
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153 password = utils.generatePassword()
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154 assert password
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155 # XXX: password is here saved in clear in database
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156 # it is needed for invitation as the same password is used for profile
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157 # and SàT need to be able to automatically open the profile with the uuid
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158 # FIXME: we could add an extra encryption key which would be used with the uuid
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159 # when the invitee is connecting (e.g. with URL). This key would not be saved
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160 # and could be used to encrypt profile password.
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161 extra[u'password'] = password
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162
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163 jid_ = kwargs.pop(u'jid_', None)
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164 if not jid_:
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165 domain = self.host.memory.getConfig(None, 'xmpp_domain')
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166 if not domain:
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167 # TODO: fallback to profile's domain
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168 raise ValueError(_(u"You need to specify xmpp_domain in sat.conf"))
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169 jid_ = u"invitation-{uuid}@{domain}".format(uuid=shortuuid.uuid(), domain=domain)
2184
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170 jid_ = jid.JID(jid_)
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171 if jid_.user:
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172 # we don't register account if there is no user as anonymous login is then used
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173 try:
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174 yield self.host.plugins['XEP-0077'].registerNewAccount(jid_, password)
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175 except error.StanzaError as e:
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176 prefix = jid_.user
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177 idx = 0
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178 while e.condition == u'conflict':
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179 if idx >= SUFFIX_MAX:
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180 raise exceptions.ConflictError(_(u"Can't create XMPP account"))
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181 jid_.user = prefix + '_' + unicode(idx)
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182 log.info(_(u"requested jid already exists, trying with {}".format(jid_.full())))
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183 try:
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184 yield self.host.plugins['XEP-0077'].registerNewAccount(jid_, password)
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185 except error.StanzaError as e:
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186 idx += 1
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187 else:
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188 break
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189 if e.condition != u'conflict':
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190 raise e
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191
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192 log.info(_(u"account {jid_} created").format(jid_=jid_.full()))
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193
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194 ## profile creation
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195 extra['guest_profile'] = guest_profile = INVITEE_PROFILE_TPL.format(uuid=id_)
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196 # profile creation should not fail as we generate unique name ourselves
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197 yield self.host.memory.createProfile(guest_profile, password)
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198 yield self.host.memory.startSession(password, guest_profile)
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199 yield self.host.memory.setParam("JabberID", jid_.full(), "Connection", profile_key=guest_profile)
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200 yield self.host.memory.setParam("Password", password, "Connection", profile_key=guest_profile)
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201
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202 ## email
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203 language = kwargs.pop(u'language', None)
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204 if language is not None:
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205 extra[u'language'] = language
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206 email = kwargs.pop(u'email', None)
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207
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208 if email is not None:
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209 url_template = kwargs.pop(u'url_template', '')
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210 format_args = {
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211 u'uuid': id_,
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212 u'app_name': C.APP_NAME,
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213 u'app_url': C.APP_URL}
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214
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215 name = kwargs.pop(u'name', None)
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216 if name is None:
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217 format_args[u'name'] = email
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218 else:
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219 format_args[u'name'] = extra[u'name'] = name
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220
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221 profile = kwargs.pop(u'profile', None)
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222 if profile is None:
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223 format_args[u'profile'] = u''
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224 else:
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225 format_args[u'profile'] = extra[u'profile'] = profile
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226
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227 host_name = kwargs.pop(u'host_name', None)
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228 if host_name is None:
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229 format_args[u'host_name'] = profile or _(u"somebody")
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230 else:
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231 format_args[u'host_name'] = extra[u'host_name'] = host_name
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232
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233 invite_url = url_template.format(**format_args)
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234 format_args[u'url'] = invite_url
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235
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236 yield sat_email.sendEmail(
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237 self.host,
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238 [email],
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239 (kwargs.pop(u'message_subject', None) or DEFAULT_SUBJECT).format(**format_args),
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240 (kwargs.pop(u'message_body', None) or DEFAULT_BODY).format(**format_args),
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241 )
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242
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243 ## extra data saving
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244 self.invitations[id_] = extra
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245
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246 if kwargs:
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247 log.warning(_(u"Not all arguments have been consumed: {}").format(kwargs))
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248
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249 defer.returnValue((id_, extra))