Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0338.py @ 4242:8acf46ed7f36

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frontends: remote control implementation: This is the frontends common part of remote control implementation. It handle the creation of WebRTC session, and management of inputs. For now the reception use freedesktop.org Desktop portal, and works mostly with Wayland based Desktop Environments. rel 436
author Goffi <goffi@goffi.org>
date Sat, 11 May 2024 13:52:43 +0200
parents c8b19a32f5c0
children 0d7bb4df2343
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
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1 #!/usr/bin/env python3
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2
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3 # Libervia plugin
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4 # Copyright (C) 2009-2023 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 from typing import List
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20
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21 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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22 from twisted.words.xish import domish
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23 from wokkel import disco, iwokkel
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24 from zope.interface import implementer
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25
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26 from libervia.backend.core.constants import Const as C
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27 from libervia.backend.core.i18n import _
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28 from libervia.backend.core.log import getLogger
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29 from libervia.backend.core.core_types import SatXMPPEntity
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30
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31 log = getLogger(__name__)
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32
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33 NS_JINGLE_GROUPING = "urn:xmpp:jingle:apps:grouping:0"
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34 NS_RFC_5888 = "urn:ietf:rfc:5888"
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35
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36 PLUGIN_INFO = {
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37 C.PI_NAME: "Jingle Grouping Framework",
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38 C.PI_IMPORT_NAME: "XEP-0338",
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39 C.PI_TYPE: "XEP",
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40 C.PI_MODES: C.PLUG_MODE_BOTH,
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41 C.PI_PROTOCOLS: ["XEP-0338"],
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42 C.PI_DEPENDENCIES: ["XEP-0166", "XEP-0167"],
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43 C.PI_RECOMMENDATIONS: [],
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44 C.PI_MAIN: "XEP_0338",
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45 C.PI_HANDLER: "yes",
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46 C.PI_DESCRIPTION: _("""Jingle mapping of RFC 5888 SDP Grouping Framework"""),
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47 }
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48
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49
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50 class XEP_0338:
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51 def __init__(self, host):
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52 log.info(f"plugin {PLUGIN_INFO[C.PI_NAME]!r} initialization")
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53 self._j = host.plugins["XEP-0166"]
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54 host.trigger.add("XEP-0167_parse_sdp_a", self._parse_sdp_a_trigger)
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55 host.trigger.add(
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56 "XEP-0167_generate_sdp_session", self._generate_sdp_session_trigger
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57 )
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58 host.trigger.add("XEP-0167_jingle_session_init", self._jingle_session_init_trigger)
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59 host.trigger.add("XEP-0167_jingle_handler", self._jingle_handler_trigger)
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60
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61 def get_handler(self, client):
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62 return XEP_0338_handler()
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63
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64 def _parse_sdp_a_trigger(
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65 self,
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66 attribute: str,
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67 parts: List[str],
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68 call_data: dict,
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69 metadata: dict,
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70 media_type: str,
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71 application_data: dict,
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72 transport_data: dict,
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73 ) -> None:
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74 """Parse "group" attributes"""
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75 if attribute == "group":
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76 semantics = parts[0]
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77 content_names = parts[1:]
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78 metadata.setdefault("group", {})[semantics] = content_names
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79
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80 def _generate_sdp_session_trigger(
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81 self,
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82 session: dict,
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83 local: bool,
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84 sdp_lines: List[str],
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85 ) -> None:
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86 """Generate "group" attributes"""
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87 key = "metadata" if local else "peer_metadata"
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88 group_data = session[key].get("group", {})
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89
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90 for semantics, content_names in group_data.items():
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91 sdp_lines.append(f"a=group:{semantics} {' '.join(content_names)}")
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92
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93 def parse_group_element(
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94 self, jingle_elt: domish.Element, session: dict
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95 ) -> None:
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96 """Parse the <group> and <content> elements"""
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97 for group_elt in jingle_elt.elements(NS_JINGLE_GROUPING, "group"):
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98 try:
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99 metadata = session["peer_metadata"]
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100 semantics = group_elt["semantics"]
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101 group_content = metadata.setdefault("group", {})[semantics] = []
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102 for content_elt in group_elt.elements(NS_JINGLE_GROUPING, "content"):
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103 group_content.append(content_elt["name"])
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104 except KeyError as e:
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105 log.warning(f"Error while parsing <group>: {e}\n{group_elt.toXml()}")
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106
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107 def add_group_element(
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108 self, jingle_elt: domish.Element, session: dict
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109 ) -> None:
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110 """Build the <group> and <content> elements if possible"""
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111 for semantics, content_names in session["metadata"].get("group", {}).items():
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112 # always add the <group> element as first child of <jingle> element to work
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113 # around https://github.com/movim/movim/issues/1233
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114 group_elt = domish.Element((NS_JINGLE_GROUPING, "group"))
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115 jingle_elt.children.insert(0, group_elt)
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116
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117 group_elt["semantics"] = semantics
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118 for content_name in content_names:
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119 content_elt = group_elt.addElement((NS_JINGLE_GROUPING, "content"))
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120 content_elt["name"] = content_name
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121
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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122 def _jingle_session_init_trigger(
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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123 self,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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124 client: SatXMPPEntity,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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125 session: dict,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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126 content_name: str,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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127 media: str,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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128 media_data: dict,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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129 desc_elt: domish.Element,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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130 ) -> None:
4122
52a89ddf3087 plugin XEP-0338: be sure to add the `<group>` element only once:
Goffi <goffi@goffi.org>
parents: 4071
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131 if content_name == next(iter(session["contents"])):
52a89ddf3087 plugin XEP-0338: be sure to add the `<group>` element only once:
Goffi <goffi@goffi.org>
parents: 4071
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132 # the <group> element must be added only once, so we do it only for the first
52a89ddf3087 plugin XEP-0338: be sure to add the `<group>` element only once:
Goffi <goffi@goffi.org>
parents: 4071
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133 # content
52a89ddf3087 plugin XEP-0338: be sure to add the `<group>` element only once:
Goffi <goffi@goffi.org>
parents: 4071
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134 jingle_elt = session["jingle_elt"]
52a89ddf3087 plugin XEP-0338: be sure to add the `<group>` element only once:
Goffi <goffi@goffi.org>
parents: 4071
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135 self.add_group_element(jingle_elt, session)
4064
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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136
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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137 def _jingle_handler_trigger(
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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138 self,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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139 client: SatXMPPEntity,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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140 action: str,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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141 session: dict,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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142 content_name: str,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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143 desc_elt: domish.Element,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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144 ) -> None:
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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145 # this is a session metadata, so we only generate it on the first content
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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146 if content_name == next(iter(session["contents"])) and action in (
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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147 self._j.A_PREPARE_CONFIRMATION,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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148 self._j.A_SESSION_INITIATE,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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149 self._j.A_PREPARE_INITIATOR,
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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150 ):
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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151 jingle_elt = session["jingle_elt"]
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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152 self.parse_group_element(jingle_elt, session)
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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153 if action == self._j.A_SESSION_INITIATE:
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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154 self.add_group_element(jingle_elt, session)
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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155
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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156
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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157 @implementer(iwokkel.IDisco)
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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158 class XEP_0338_handler(XMPPHandler):
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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159 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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160 return [disco.DiscoFeature(NS_RFC_5888)]
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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161
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
162 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
08ee0e623e7e plugin XEP-0338: "Jingle Grouping Framework" implementation:
Goffi <goffi@goffi.org>
parents:
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163 return []