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annotate src/plugins/plugin_xep_0095.py @ 428:a4a9efadabfc

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core: fixed memory initialisation sequence
author Goffi <goffi@goffi.org>
date Fri, 11 Nov 2011 19:49:00 +0100
parents cb0285372818
children cf005701624b
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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3
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4 """
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5 SAT plugin for managing xep-0095
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6 Copyright (C) 2009, 2010, 2011 Jérôme Poisson (goffi@goffi.org)
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7
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8 This program is free software: you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation, either version 3 of the License, or
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11 (at your option) any later version.
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12
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13 This program is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 """
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21
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22 from logging import debug, info, error
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23 from twisted.words.xish import domish
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24 from twisted.internet import protocol
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25 from twisted.words.protocols.jabber import client, jid
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26 from twisted.words.protocols.jabber import error as jab_error
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27 import os.path
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28 from twisted.internet import reactor
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29 import uuid
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30
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31 from zope.interface import implements
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32
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33 try:
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34 from twisted.words.protocols.xmlstream import XMPPHandler
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35 except ImportError:
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36 from wokkel.subprotocols import XMPPHandler
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37
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38 from wokkel import disco, iwokkel
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39
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40 IQ_SET = '/iq[@type="set"]'
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41 NS_SI = 'http://jabber.org/protocol/si'
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42 SI_REQUEST = IQ_SET + '/si[@xmlns="' + NS_SI + '"]'
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43 SI_PROFILE_HEADER = "http://jabber.org/protocol/si/profile/"
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44
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45 PLUGIN_INFO = {
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46 "name": "XEP 0095 Plugin",
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47 "import_name": "XEP-0095",
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48 "type": "XEP",
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49 "protocols": ["XEP-0095"],
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50 "main": "XEP_0095",
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51 "handler": "yes",
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52 "description": _("""Implementation of Stream Initiation""")
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53 }
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54
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55 class XEP_0095():
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56
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57 def __init__(self, host):
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58 info(_("Plugin XEP_0095 initialization"))
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59 self.host = host
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60 self.si_profiles = {} #key: SI profile, value: callback
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61
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62 def getHandler(self, profile):
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63 return XEP_0095_handler(self)
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64
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65 def registerSIProfile(self, si_profile, callback):
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66 """Add a callback for a SI Profile
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67 param si_profile: SI profile name (e.g. file-transfer)
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68 param callback: method to call when the profile name is asked"""
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69 self.si_profiles[si_profile] = callback
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70
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71 def streamInit(self, iq_el, profile):
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72 """This method is called on stream initiation (XEP-0095 #3.2)
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73 @param iq_el: IQ element
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74 @param profile: %(doc_profile)s"""
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75 info (_("XEP-0095 Stream initiation"))
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76 iq_el.handled=True
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77 si_el = iq_el.firstChildElement()
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78 si_id = si_el.getAttribute('id')
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79 si_mime_type = iq_el.getAttribute('mime-type', 'application/octet-stream')
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80 si_profile = si_el.getAttribute('profile')
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81 si_profile_key = si_profile[len(SI_PROFILE_HEADER):] if si_profile.startswith(SI_PROFILE_HEADER) else si_profile
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82 if self.si_profiles.has_key(si_profile_key):
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83 #We know this SI profile, we call the callback
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84 self.si_profiles[si_profile_key](iq_el['id'], iq_el['from'], si_id, si_mime_type, si_el, profile)
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85 else:
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86 #We don't know this profile, we send an error
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87 self.sendBadProfileError(iq_el['id'], iq_el['from'], profile)
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88
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89 def sendRejectedError(self, iq_id, to_jid, reason = 'Offer Declined', profile='@NONE@'):
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90 """Helper method to send when the stream is rejected
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91 @param iq_id: IQ id
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92 @param to_jid: recipient
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93 @param reason: human readable reason (string)
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94 @param profile: %(doc_profile)s"""
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95 self.sendError(iq_id, to_jid, 403, 'cancel', {'text':reason}, profile=profile)
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96
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97 def sendBadProfileError(self, iq_id, to_jid, profile):
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98 """Helper method to send when we don't know the SI profile
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99 @param iq_id: IQ id
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100 @param to_jid: recipient
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101 @param profile: %(doc_profile)s"""
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102 self.sendError(iq_id, to_jid, 400, 'modify', profile=profile)
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103
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104 def sendBadRequestError(self, iq_id, to_jid, profile):
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105 """Helper method to send when we don't know the SI profile
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106 @param iq_id: IQ id
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107 @param to_jid: recipient
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108 @param profile: %(doc_profile)s"""
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109 self.sendError(iq_id, to_jid, 400, 'cancel', profile=profile)
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110
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111 def sendFailedError(self, iq_id, to_jid, profile):
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112 """Helper method to send when we transfer failed
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113 @param iq_id: IQ id
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114 @param to_jid: recipient
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115 @param profile: %(doc_profile)s"""
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116 self.sendError(iq_id, to_jid, 500, 'cancel', {'custom':'failed'}, profile=profile) #as there is no error code for failed transfer, we use 500 (undefined-condition)
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117
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118 def sendError(self, iq_id, to_jid, err_code, err_type='cancel', data={}, profile='@NONE@'):
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119 """Send IQ error as a result
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120 @param iq_id: IQ id
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121 @param to_jid: recipient
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122 @param err_code: error err_code (see XEP-0095 #4.2)
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123 @param err_type: one of cancel, modify
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124 @param data: error specific data (dictionary)
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125 @param profile: %(doc_profile)s
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126 """
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127 client = self.host.getClient(profile)
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128 assert(client)
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129 result = domish.Element(('', 'iq'))
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130 result['type'] = 'result'
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131 result['id'] = iq_id
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132 result['to'] = to_jid
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133 error_el = result.addElement('error')
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134 error_el['err_code'] = str(err_code)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
135 error_el['type'] = err_type
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
136 if err_code==400 and err_type=='cancel':
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
137 error_el.addElement(('urn:ietf:params:xml:ns:xmpp-stanzas','bad-request'))
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
138 error_el.addElement((NS_SI,'no-valid-streams'))
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
139 elif err_code==400 and err_type=='modify':
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
140 error_el.addElement(('urn:ietf:params:xml:ns:xmpp-stanzas','bad-request'))
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
141 error_el.addElement((NS_SI,'bad-profile'))
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
142 elif err_code==403 and err_type=='cancel':
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
143 error_el.addElement(('urn:ietf:params:xml:ns:xmpp-stanzas','forbidden'))
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
144 if data.has_key('text'):
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
145 error_el.addElement(('urn:ietf:params:xml:ns:xmpp-stanzas','text'), content=data['text'])
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
146 elif err_code==500 and err_type=='cancel':
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
147 condition_el = error_el.addElement((NS_SI,'undefined-condition'))
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
148 if data.has_key('custom') and data['custom']=='failed':
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
149 condition_el.addContent('Stream failed')
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
150
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
151 client.xmlstream.send(result)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
152
394
8f3551ceee17 plugin XEP-0065: refactored and misc stuff fixed. Still not finished
Goffi <goffi@goffi.org>
parents: 391
diff changeset
153 def acceptStream(self, iq_id, to_jid, feature_elt, misc_elts=[], profile='@NONE@'):
385
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
154 """Send the accept stream initiation answer
394
8f3551ceee17 plugin XEP-0065: refactored and misc stuff fixed. Still not finished
Goffi <goffi@goffi.org>
parents: 391
diff changeset
155 @param iq_id: IQ id
385
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
156 @param feature_elt: domish element 'feature' containing stream method to use
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
157 @param misc_elts: list of domish element to add
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
158 @param profile: %(doc_profile)s"""
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
159 client = self.host.getClient(profile)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
160 assert(client)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
161 info (_("sending stream initiation accept answer"))
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
162 result = domish.Element(('', 'iq'))
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
163 result['type'] = 'result'
394
8f3551ceee17 plugin XEP-0065: refactored and misc stuff fixed. Still not finished
Goffi <goffi@goffi.org>
parents: 391
diff changeset
164 result['id'] = iq_id
385
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
165 result['to'] = to_jid
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
166 si = result.addElement('si', NS_SI)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
167 si.addChild(feature_elt)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
168 for elt in misc_elts:
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
169 si.addChild(elt)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
170 client.xmlstream.send(result)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
171
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
172 def proposeStream(self, to_jid, si_profile, feature_elt, misc_elts, mime_type='application/octet-stream', profile_key='@NONE@'):
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
173 """Propose a stream initiation
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
174 @param to_jid: recipient (JID)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
175 @param si_profile: Stream initiation profile (XEP-0095)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
176 @param feature_elt: feature domish element, according to XEP-0020
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
177 @param misc_elts: list of domish element to add for this profile
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
178 @param mime_type: stream mime type
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
179 @param profile: %(doc_profile)s
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
180 @return: session id, offer"""
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
181 current_jid, xmlstream = self.host.getJidNStream(profile_key)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
182 if not xmlstream:
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
183 error (_('Asking for an non-existant or not connected profile'))
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
184 return ""
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
185
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
186 offer = client.IQ(xmlstream,'set')
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
187 sid = str(uuid.uuid4())
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
188 debug (_("Stream Session ID: %s") % offer["id"])
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
189
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
190 offer["from"] = current_jid.full()
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
191 offer["to"] = to_jid.full()
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
192 si=offer.addElement('si',NS_SI)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
193 si['id'] = sid
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
194 si["mime-type"] = mime_type
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
195 si["profile"] = si_profile
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
196 for elt in misc_elts:
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
197 si.addChild(elt)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
198 si.addChild(feature_elt)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
199
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
200 offer.send()
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
201 return sid, offer
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
202
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
203
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
204 class XEP_0095_handler(XMPPHandler):
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
205 implements(iwokkel.IDisco)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
206
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
207 def __init__(self, plugin_parent):
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
208 self.plugin_parent = plugin_parent
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
209 self.host = plugin_parent.host
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
210
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
211 def connectionInitialized(self):
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
212 self.xmlstream.addObserver(SI_REQUEST, self.plugin_parent.streamInit, profile = self.parent.profile)
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
213
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
214 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
215 return [disco.DiscoFeature(NS_SI)] + [disco.DiscoFeature("http://jabber.org/protocol/si/profile/%s" % profile_name) for profile_name in self.plugin_parent.si_profiles]
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
216
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
217 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
218 return []
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
219