Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_xep_0338.py @ 4196:8b673bb307c1
plugin XEP-0045: avoir crash if `subject` is not set when `_get_room_joined_args` is called.
author | Goffi <goffi@goffi.org> |
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date | Wed, 13 Dec 2023 22:00:25 +0100 |
parents | c8b19a32f5c0 |
children | 0d7bb4df2343 |
rev | line source |
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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 |
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122 def _jingle_session_init_trigger( |
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123 self, |
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124 client: SatXMPPEntity, |
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125 session: dict, |
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126 content_name: str, |
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127 media: str, |
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128 media_data: dict, |
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129 desc_elt: domish.Element, |
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130 ) -> None: |
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131 if content_name == next(iter(session["contents"])): |
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132 # the <group> element must be added only once, so we do it only for the first |
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133 # content |
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134 jingle_elt = session["jingle_elt"] |
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135 self.add_group_element(jingle_elt, session) |
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136 |
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137 def _jingle_handler_trigger( |
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138 self, |
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139 client: SatXMPPEntity, |
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140 action: str, |
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141 session: dict, |
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142 content_name: str, |
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143 desc_elt: domish.Element, |
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144 ) -> None: |
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145 # this is a session metadata, so we only generate it on the first content |
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146 if content_name == next(iter(session["contents"])) and action in ( |
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147 self._j.A_PREPARE_CONFIRMATION, |
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148 self._j.A_SESSION_INITIATE, |
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149 self._j.A_PREPARE_INITIATOR, |
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150 ): |
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151 jingle_elt = session["jingle_elt"] |
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152 self.parse_group_element(jingle_elt, session) |
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153 if action == self._j.A_SESSION_INITIATE: |
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154 self.add_group_element(jingle_elt, session) |
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155 |
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156 |
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157 @implementer(iwokkel.IDisco) |
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158 class XEP_0338_handler(XMPPHandler): |
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159 def getDiscoInfo(self, requestor, target, nodeIdentifier=""): |
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160 return [disco.DiscoFeature(NS_RFC_5888)] |
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161 |
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162 def getDiscoItems(self, requestor, target, nodeIdentifier=""): |
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163 return [] |