Mercurial > libervia-backend
annotate sat/plugins/plugin_adhoc_dbus.py @ 2646:712cb4ff3e13
core: new EncryptionHandler class which manage encrypted session as a core feature:
Plugin handling encryption can now register using host.registerEncryptionPlugin, and an encryption session can now be started using messageEncryptionStart bridge method.
This will make encryption handling more easy, as we now know if a session is clear or e2e encrypted, and which plugin handle it.
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Sun, 29 Jul 2018 19:22:56 +0200 |
| parents | 56f94936df1e |
| children | 8dd9db785ac8 |
| rev | line source |
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1 #!/usr/bin/env python2 |
| 822 | 2 # -*- coding: utf-8 -*- |
| 3 | |
| 4 # SAT plugin for adding D-Bus to Ad-Hoc Commands | |
| 2483 | 5 # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org) |
| 822 | 6 |
| 7 # This program is free software: you can redistribute it and/or modify | |
| 8 # it under the terms of the GNU Affero General Public License as published by | |
| 9 # the Free Software Foundation, either version 3 of the License, or | |
| 10 # (at your option) any later version. | |
| 11 | |
| 12 # This program is distributed in the hope that it will be useful, | |
| 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 # GNU Affero General Public License for more details. | |
| 16 | |
| 17 # You should have received a copy of the GNU Affero General Public License | |
| 18 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 | |
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20 from sat.core.i18n import _ |
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21 from sat.core.constants import Const as C |
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22 from sat.core.log import getLogger |
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23 |
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24 log = getLogger(__name__) |
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25 from sat.core import exceptions |
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26 from twisted.internet import defer |
| 822 | 27 from wokkel import data_form |
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28 |
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29 try: |
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30 from lxml import etree |
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31 except ImportError: |
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32 raise exceptions.MissingModule( |
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33 u"Missing module lxml, please download/install it from http://lxml.de/" |
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34 ) |
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35 import os.path |
| 822 | 36 import uuid |
| 37 import dbus | |
| 38 from dbus.mainloop.glib import DBusGMainLoop | |
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39 |
| 822 | 40 DBusGMainLoop(set_as_default=True) |
| 41 | |
| 42 FD_NAME = "org.freedesktop.DBus" | |
| 43 FD_PATH = "/org/freedekstop/DBus" | |
| 44 INTROSPECT_IFACE = "org.freedesktop.DBus.Introspectable" | |
| 45 | |
| 46 INTROSPECT_METHOD = "Introspect" | |
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47 IGNORED_IFACES_START = ( |
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48 "org.freedesktop", |
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49 "org.qtproject", |
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50 "org.kde.KMainWindow", |
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51 ) # commands in interface starting with these values will be ignored |
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52 FLAG_LOOP = "LOOP" |
| 822 | 53 |
| 54 PLUGIN_INFO = { | |
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55 C.PI_NAME: "Ad-Hoc Commands - D-Bus", |
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56 C.PI_IMPORT_NAME: "AD_HOC_DBUS", |
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57 C.PI_TYPE: "Misc", |
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58 C.PI_PROTOCOLS: [], |
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59 C.PI_DEPENDENCIES: ["XEP-0050"], |
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60 C.PI_MAIN: "AdHocDBus", |
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61 C.PI_HANDLER: "no", |
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62 C.PI_DESCRIPTION: _("""Add D-Bus management to Ad-Hoc commands"""), |
| 822 | 63 } |
| 64 | |
| 65 | |
| 66 class AdHocDBus(object): | |
| 67 def __init__(self, host): | |
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68 log.info(_("plugin Ad-Hoc D-Bus initialization")) |
| 822 | 69 self.host = host |
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70 host.bridge.addMethod( |
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71 "adHocDBusAddAuto", |
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72 ".plugin", |
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73 in_sign="sasasasasasass", |
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74 out_sign="(sa(sss))", |
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75 method=self._adHocDBusAddAuto, |
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76 async=True, |
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77 ) |
| 822 | 78 self.session_bus = dbus.SessionBus() |
| 79 self.fd_object = self.session_bus.get_object(FD_NAME, FD_PATH, introspect=False) | |
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80 self.XEP_0050 = host.plugins["XEP-0050"] |
| 822 | 81 |
| 82 def _DBusAsyncCall(self, proxy, method, *args, **kwargs): | |
| 83 """ Call a DBus method asynchronously and return a deferred | |
| 84 @param proxy: DBus object proxy, as returner by get_object | |
| 85 @param method: name of the method to call | |
| 86 @param args: will be transmitted to the method | |
| 87 @param kwargs: will be transmetted to the method, except for the following poped values: | |
| 88 - interface: name of the interface to use | |
| 89 @return: a deferred | |
| 90 | |
| 91 """ | |
| 92 d = defer.Deferred() | |
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93 interface = kwargs.pop("interface", None) |
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94 kwargs["reply_handler"] = lambda ret=None: d.callback(ret) |
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95 kwargs["error_handler"] = d.errback |
| 822 | 96 proxy.get_dbus_method(method, dbus_interface=interface)(*args, **kwargs) |
| 97 return d | |
| 98 | |
| 99 def _DBusListNames(self): | |
| 100 return self._DBusAsyncCall(self.fd_object, "ListNames") | |
| 101 | |
| 102 def _DBusIntrospect(self, proxy): | |
| 103 return self._DBusAsyncCall(proxy, INTROSPECT_METHOD, interface=INTROSPECT_IFACE) | |
| 104 | |
| 105 def _acceptMethod(self, method): | |
| 106 """ Return True if we accept the method for a command | |
| 107 @param method: etree.Element | |
| 108 @return: True if the method is acceptable | |
| 109 | |
| 110 """ | |
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111 if method.xpath( |
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112 "arg[@direction='in']" |
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113 ): # we don't accept method with argument for the moment |
| 822 | 114 return False |
| 115 return True | |
| 116 | |
| 117 @defer.inlineCallbacks | |
| 118 def _introspect(self, methods, bus_name, proxy): | |
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119 log.debug("introspecting path [%s]" % proxy.object_path) |
| 822 | 120 introspect_xml = yield self._DBusIntrospect(proxy) |
| 121 el = etree.fromstring(introspect_xml) | |
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122 for node in el.iterchildren("node", "interface"): |
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123 if node.tag == "node": |
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124 new_path = os.path.join(proxy.object_path, node.get("name")) |
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125 new_proxy = self.session_bus.get_object( |
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126 bus_name, new_path, introspect=False |
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127 ) |
| 822 | 128 yield self._introspect(methods, bus_name, new_proxy) |
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129 elif node.tag == "interface": |
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130 name = node.get("name") |
| 822 | 131 if any(name.startswith(ignored) for ignored in IGNORED_IFACES_START): |
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132 log.debug("interface [%s] is ignored" % name) |
| 822 | 133 continue |
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134 log.debug("introspecting interface [%s]" % name) |
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135 for method in node.iterchildren("method"): |
| 822 | 136 if self._acceptMethod(method): |
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137 method_name = method.get("name") |
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138 log.debug("method accepted: [%s]" % method_name) |
| 822 | 139 methods.add((proxy.object_path, name, method_name)) |
| 140 | |
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141 def _adHocDBusAddAuto( |
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142 self, |
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143 prog_name, |
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144 allowed_jids, |
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145 allowed_groups, |
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146 allowed_magics, |
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147 forbidden_jids, |
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148 forbidden_groups, |
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149 flags, |
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150 profile_key, |
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151 ): |
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152 return self.adHocDBusAddAuto( |
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153 prog_name, |
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154 allowed_jids, |
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155 allowed_groups, |
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156 allowed_magics, |
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157 forbidden_jids, |
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158 forbidden_groups, |
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159 flags, |
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160 profile_key, |
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161 ) |
| 822 | 162 |
| 163 @defer.inlineCallbacks | |
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164 def adHocDBusAddAuto( |
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165 self, |
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166 prog_name, |
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167 allowed_jids=None, |
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168 allowed_groups=None, |
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169 allowed_magics=None, |
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170 forbidden_jids=None, |
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171 forbidden_groups=None, |
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172 flags=None, |
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173 profile_key=C.PROF_KEY_NONE, |
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174 ): |
| 822 | 175 bus_names = yield self._DBusListNames() |
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176 bus_names = [bus_name for bus_name in bus_names if "." + prog_name in bus_name] |
| 822 | 177 if not bus_names: |
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178 log.info("Can't find any bus for [%s]" % prog_name) |
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179 defer.returnValue(("", [])) |
| 822 | 180 bus_names.sort() |
| 181 for bus_name in bus_names: | |
| 182 if bus_name.endswith(prog_name): | |
| 183 break | |
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184 log.info("bus name found: [%s]" % bus_name) |
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185 proxy = self.session_bus.get_object(bus_name, "/", introspect=False) |
| 822 | 186 methods = set() |
| 187 | |
| 188 yield self._introspect(methods, bus_name, proxy) | |
| 189 | |
| 190 if methods: | |
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191 self._addCommand( |
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192 prog_name, |
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193 bus_name, |
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194 methods, |
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195 allowed_jids=allowed_jids, |
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196 allowed_groups=allowed_groups, |
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197 allowed_magics=allowed_magics, |
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198 forbidden_jids=forbidden_jids, |
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199 forbidden_groups=forbidden_groups, |
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200 flags=flags, |
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201 profile_key=profile_key, |
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202 ) |
| 822 | 203 |
| 204 defer.returnValue((bus_name, methods)) | |
| 205 | |
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206 def _addCommand( |
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207 self, |
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208 adhoc_name, |
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209 bus_name, |
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210 methods, |
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211 allowed_jids=None, |
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212 allowed_groups=None, |
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213 allowed_magics=None, |
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214 forbidden_jids=None, |
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215 forbidden_groups=None, |
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216 flags=None, |
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217 profile_key=C.PROF_KEY_NONE, |
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218 ): |
| 822 | 219 if flags is None: |
| 220 flags = set() | |
| 221 | |
| 222 def DBusCallback(command_elt, session_data, action, node, profile): | |
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223 actions = session_data.setdefault("actions", []) |
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224 names_map = session_data.setdefault("names_map", {}) |
| 822 | 225 actions.append(action) |
| 226 | |
| 227 if len(actions) == 1: | |
| 228 # it's our first request, we ask the desired new status | |
| 229 status = self.XEP_0050.STATUS.EXECUTING | |
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230 form = data_form.Form("form", title=_("Command selection")) |
| 822 | 231 options = [] |
| 232 for path, iface, command in methods: | |
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233 label = command.rsplit(".", 1)[-1] |
| 822 | 234 name = str(uuid.uuid4()) |
| 235 names_map[name] = (path, iface, command) | |
| 236 options.append(data_form.Option(name, label)) | |
| 237 | |
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238 field = data_form.Field( |
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239 "list-single", "command", options=options, required=True |
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240 ) |
| 822 | 241 form.addField(field) |
| 242 | |
| 243 payload = form.toElement() | |
| 244 note = None | |
| 245 | |
| 246 elif len(actions) == 2: | |
| 247 # we should have the answer here | |
| 248 try: | |
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249 x_elt = command_elt.elements(data_form.NS_X_DATA, "x").next() |
| 822 | 250 answer_form = data_form.Form.fromElement(x_elt) |
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251 command = answer_form["command"] |
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252 except (KeyError, StopIteration): |
| 822 | 253 raise self.XEP_0050.AdHocError(self.XEP_0050.ERROR.BAD_PAYLOAD) |
| 254 | |
| 255 if command not in names_map: | |
| 256 raise self.XEP_0050.AdHocError(self.XEP_0050.ERROR.BAD_PAYLOAD) | |
| 257 | |
| 258 path, iface, command = names_map[command] | |
| 259 proxy = self.session_bus.get_object(bus_name, path) | |
| 260 | |
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261 self._DBusAsyncCall(proxy, command, interface=iface) |
| 822 | 262 |
| 263 # job done, we can end the session, except if we have FLAG_LOOP | |
| 264 if FLAG_LOOP in flags: | |
| 265 # We have a loop, so we clear everything and we execute again the command as we had a first call (command_elt is not used, so None is OK) | |
| 266 del actions[:] | |
| 267 names_map.clear() | |
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268 return DBusCallback( |
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269 None, session_data, self.XEP_0050.ACTION.EXECUTE, node, profile |
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270 ) |
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271 form = data_form.Form("form", title=_(u"Updated")) |
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272 form.addField(data_form.Field("fixed", u"Command sent")) |
| 822 | 273 status = self.XEP_0050.STATUS.COMPLETED |
| 274 payload = None | |
| 275 note = (self.XEP_0050.NOTE.INFO, _(u"Command sent")) | |
| 276 else: | |
| 277 raise self.XEP_0050.AdHocError(self.XEP_0050.ERROR.INTERNAL) | |
| 278 | |
| 279 return (payload, status, None, note) | |
| 280 | |
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281 self.XEP_0050.addAdHocCommand( |
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282 DBusCallback, |
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283 adhoc_name, |
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284 allowed_jids=allowed_jids, |
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285 allowed_groups=allowed_groups, |
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286 allowed_magics=allowed_magics, |
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287 forbidden_jids=forbidden_jids, |
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288 forbidden_groups=forbidden_groups, |
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289 profile_key=profile_key, |
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290 ) |