Mercurial > libervia-backend
annotate sat/plugins/plugin_exp_pubsub_hook.py @ 3281:a3639d6d9643
core: replaced `sat` shell script by a python script:
the backend is now launched by `sat.core.launcher`, and the script is generated during
installation with a new entry point in `setup.py`.
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Mon, 25 May 2020 15:50:01 +0200 |
| parents | 559a625a236b |
| children | be6d91572633 |
| rev | line source |
|---|---|
| 3028 | 1 #!/usr/bin/env python3 |
| 3137 | 2 |
| 2307 | 3 |
| 4 # SAT plugin for Pubsub Hooks | |
| 3136 | 5 # Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org) |
| 2307 | 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 | |
| 20 from sat.core.i18n import _ | |
| 21 from sat.core.constants import Const as C | |
| 22 from sat.core import exceptions | |
| 23 from sat.core.log import getLogger | |
| 24 from sat.memory import persistent | |
| 25 from twisted.words.protocols.jabber import jid | |
| 26 from twisted.internet import defer | |
|
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27 |
| 2307 | 28 log = getLogger(__name__) |
| 29 | |
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30 NS_PUBSUB_HOOK = "PUBSUB_HOOK" |
| 2307 | 31 |
| 32 PLUGIN_INFO = { | |
| 33 C.PI_NAME: "PubSub Hook", | |
| 34 C.PI_IMPORT_NAME: NS_PUBSUB_HOOK, | |
| 35 C.PI_TYPE: "EXP", | |
| 36 C.PI_PROTOCOLS: [], | |
| 37 C.PI_DEPENDENCIES: ["XEP-0060"], | |
| 38 C.PI_MAIN: "PubsubHook", | |
| 39 C.PI_HANDLER: "no", | |
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40 C.PI_DESCRIPTION: _( |
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41 """Experimental plugin to launch on action on Pubsub notifications""" |
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42 ), |
| 2307 | 43 } |
| 44 | |
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45 # python module |
| 3028 | 46 HOOK_TYPE_PYTHON = "python" |
| 2307 | 47 # python file path |
| 3028 | 48 HOOK_TYPE_PYTHON_FILE = "python_file" |
| 2307 | 49 # python code directly |
| 3028 | 50 HOOK_TYPE_PYTHON_CODE = "python_code" |
| 2307 | 51 HOOK_TYPES = (HOOK_TYPE_PYTHON, HOOK_TYPE_PYTHON_FILE, HOOK_TYPE_PYTHON_CODE) |
| 52 | |
| 53 | |
| 54 class PubsubHook(object): | |
| 55 def __init__(self, host): | |
| 3028 | 56 log.info(_("PubSub Hook initialization")) |
| 2307 | 57 self.host = host |
| 58 self.node_hooks = {} # keep track of the number of hooks per node (for all profiles) | |
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59 host.bridge.addMethod( |
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60 "psHookAdd", ".plugin", in_sign="ssssbs", out_sign="", method=self._addHook |
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61 ) |
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62 host.bridge.addMethod( |
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63 "psHookRemove", |
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64 ".plugin", |
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65 in_sign="sssss", |
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66 out_sign="i", |
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67 method=self._removeHook, |
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68 ) |
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69 host.bridge.addMethod( |
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70 "psHookList", |
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71 ".plugin", |
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72 in_sign="s", |
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73 out_sign="aa{ss}", |
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74 method=self._listHooks, |
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75 ) |
| 2307 | 76 |
| 77 @defer.inlineCallbacks | |
| 78 def profileConnected(self, client): | |
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79 hooks = client._hooks = persistent.PersistentBinaryDict( |
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80 NS_PUBSUB_HOOK, client.profile |
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81 ) |
| 2307 | 82 client._hooks_temporary = {} |
| 83 yield hooks.load() | |
| 84 for node in hooks: | |
| 85 self._installNodeManager(client, node) | |
| 86 | |
| 87 def profileDisconnected(self, client): | |
| 88 for node in client._hooks: | |
| 89 self._removeNodeManager(client, node) | |
| 90 | |
| 91 def _installNodeManager(self, client, node): | |
| 92 if node in self.node_hooks: | |
| 3028 | 93 log.debug(_("node manager already set for {node}").format(node=node)) |
| 2307 | 94 self.node_hooks[node] += 1 |
| 95 else: | |
| 96 # first hook on this node | |
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97 self.host.plugins["XEP-0060"].addManagedNode( |
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98 node, items_cb=self._itemsReceived |
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99 ) |
| 2307 | 100 self.node_hooks[node] = 0 |
| 3028 | 101 log.info(_("node manager installed on {node}").format(node=node)) |
| 2307 | 102 |
| 103 def _removeNodeManager(self, client, node): | |
| 104 try: | |
| 105 self.node_hooks[node] -= 1 | |
| 106 except KeyError: | |
| 3028 | 107 log.error(_("trying to remove a {node} without hook").format(node=node)) |
| 2307 | 108 else: |
| 109 if self.node_hooks[node] == 0: | |
| 110 del self.node_hooks[node] | |
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111 self.host.plugins["XEP-0060"].removeManagedNode(node, self._itemsReceived) |
| 3028 | 112 log.debug(_("hook removed")) |
| 2307 | 113 else: |
| 3028 | 114 log.debug(_("node still needed for an other hook")) |
| 2307 | 115 |
| 116 def installHook(self, client, service, node, hook_type, hook_arg, persistent): | |
| 117 if hook_type not in HOOK_TYPES: | |
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118 raise exceptions.DataError( |
| 3028 | 119 _("{hook_type} is not handled").format(hook_type=hook_type) |
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120 ) |
| 2307 | 121 if hook_type != HOOK_TYPE_PYTHON_FILE: |
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122 raise NotImplementedError( |
| 3028 | 123 _("{hook_type} hook type not implemented yet").format( |
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124 hook_type=hook_type |
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125 ) |
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126 ) |
| 2307 | 127 self._installNodeManager(client, node) |
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128 hook_data = {"service": service, "type": hook_type, "arg": hook_arg} |
| 2307 | 129 |
| 130 if persistent: | |
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131 hooks_list = client._hooks.setdefault(node, []) |
| 2307 | 132 hooks_list.append(hook_data) |
| 133 client._hooks.force(node) | |
| 134 else: | |
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135 hooks_list = client._hooks_temporary.setdefault(node, []) |
| 2307 | 136 hooks_list.append(hook_data) |
| 137 | |
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138 log.info( |
| 3028 | 139 _("{persistent} hook installed on {node} for {profile}").format( |
| 140 persistent=_("persistent") if persistent else _("temporary"), | |
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141 node=node, |
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142 profile=client.profile, |
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143 ) |
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144 ) |
| 2307 | 145 |
| 146 def _itemsReceived(self, client, itemsEvent): | |
| 147 node = itemsEvent.nodeIdentifier | |
| 148 for hooks in (client._hooks, client._hooks_temporary): | |
| 149 if node not in hooks: | |
| 150 continue | |
| 151 hooks_list = hooks[node] | |
| 152 for hook_data in hooks_list[:]: | |
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153 if hook_data["service"] != itemsEvent.sender.userhostJID(): |
| 2307 | 154 continue |
| 155 try: | |
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156 callback = hook_data["callback"] |
| 2307 | 157 except KeyError: |
| 158 # first time we get this hook, we create the callback | |
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159 hook_type = hook_data["type"] |
| 2307 | 160 try: |
| 161 if hook_type == HOOK_TYPE_PYTHON_FILE: | |
| 162 hook_globals = {} | |
| 3028 | 163 exec(compile(open(hook_data["arg"], "rb").read(), hook_data["arg"], 'exec'), hook_globals) |
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164 callback = hook_globals["hook"] |
| 2307 | 165 else: |
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166 raise NotImplementedError( |
| 3028 | 167 _("{hook_type} hook type not implemented yet").format( |
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168 hook_type=hook_type |
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169 ) |
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170 ) |
| 2307 | 171 except Exception as e: |
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172 log.warning( |
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173 _( |
| 3028 | 174 "Can't load Pubsub hook at node {node}, it will be removed: {reason}" |
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175 ).format(node=node, reason=e) |
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176 ) |
| 2307 | 177 hooks_list.remove(hook_data) |
| 178 continue | |
| 179 | |
| 180 for item in itemsEvent.items: | |
| 181 try: | |
| 182 callback(self.host, client, item) | |
| 183 except Exception as e: | |
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184 log.warning( |
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185 _( |
| 3028 | 186 "Error while running Pubsub hook for node {node}: {msg}" |
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187 ).format(node=node, msg=e) |
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188 ) |
| 2307 | 189 |
| 190 def _addHook(self, service, node, hook_type, hook_arg, persistent, profile): | |
| 191 client = self.host.getClient(profile) | |
| 192 service = jid.JID(service) if service else client.jid.userhostJID() | |
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193 return self.addHook( |
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194 client, |
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195 service, |
| 3028 | 196 str(node), |
| 197 str(hook_type), | |
| 198 str(hook_arg), | |
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199 persistent, |
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200 ) |
| 2307 | 201 |
| 202 def addHook(self, client, service, node, hook_type, hook_arg, persistent): | |
| 203 r"""Add a hook which will be triggered on a pubsub notification | |
| 204 | |
| 205 @param service(jid.JID): service of the node | |
| 206 @param node(unicode): Pubsub node | |
| 207 @param hook_type(unicode): type of the hook, one of: | |
| 208 - HOOK_TYPE_PYTHON: a python module (must be in path) | |
| 209 module must have a "hook" method which will be called | |
| 210 - HOOK_TYPE_PYTHON_FILE: a python file | |
| 211 file must have a "hook" method which will be called | |
| 212 - HOOK_TYPE_PYTHON_CODE: direct python code | |
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213 /!\ Python hooks will be executed in SàT context, |
| 2307 | 214 with host, client and item as arguments, it means that: |
| 215 - they can do whatever they wants, so don't run untrusted hooks | |
| 216 - they MUST NOT BLOCK, they are run in Twisted async environment and blocking would block whole SàT process | |
| 217 - item are domish.Element | |
| 218 @param hook_arg(unicode): argument of the hook, depending on the hook_type | |
| 219 can be a module path, file path, python code | |
| 220 """ | |
| 221 assert service is not None | |
| 222 return self.installHook(client, service, node, hook_type, hook_arg, persistent) | |
| 223 | |
| 224 def _removeHook(self, service, node, hook_type, hook_arg, profile): | |
| 225 client = self.host.getClient(profile) | |
| 226 service = jid.JID(service) if service else client.jid.userhostJID() | |
| 227 return self.removeHook(client, service, node, hook_type or None, hook_arg or None) | |
| 228 | |
| 229 def removeHook(self, client, service, node, hook_type=None, hook_arg=None): | |
| 230 """Remove a persistent or temporaty root | |
| 231 | |
| 232 @param service(jid.JID): service of the node | |
| 233 @param node(unicode): Pubsub node | |
| 234 @param hook_type(unicode, None): same as for [addHook] | |
| 235 match all if None | |
| 236 @param hook_arg(unicode, None): same as for [addHook] | |
| 237 match all if None | |
| 238 @return(int): number of hooks removed | |
| 239 """ | |
| 240 removed = 0 | |
| 241 for hooks in (client._hooks, client._hooks_temporary): | |
| 242 if node in hooks: | |
| 243 for hook_data in hooks[node]: | |
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244 if ( |
| 3028 | 245 service != hook_data["service"] |
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246 or hook_type is not None |
| 3028 | 247 and hook_type != hook_data["type"] |
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248 or hook_arg is not None |
| 3028 | 249 and hook_arg != hook_data["arg"] |
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250 ): |
| 2307 | 251 continue |
| 252 hooks[node].remove(hook_data) | |
| 253 removed += 1 | |
| 254 if not hooks[node]: | |
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255 # no more hooks, we can remove the node |
| 2307 | 256 del hooks[node] |
| 257 self._removeNodeManager(client, node) | |
| 258 else: | |
| 259 if hooks == client._hooks: | |
| 260 hooks.force(node) | |
| 261 return removed | |
| 262 | |
| 263 def _listHooks(self, profile): | |
| 264 hooks_list = self.listHooks(self.host.getClient(profile)) | |
| 265 for hook in hooks_list: | |
| 3028 | 266 hook["service"] = hook["service"].full() |
| 267 hook["persistent"] = C.boolConst(hook["persistent"]) | |
| 2307 | 268 return hooks_list |
| 269 | |
| 270 def listHooks(self, client): | |
| 271 """return list of registered hooks""" | |
| 272 hooks_list = [] | |
| 273 for hooks in (client._hooks, client._hooks_temporary): | |
| 274 persistent = hooks is client._hooks | |
| 3028 | 275 for node, hooks_data in hooks.items(): |
| 2307 | 276 for hook_data in hooks_data: |
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277 hooks_list.append( |
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278 { |
| 3028 | 279 "service": hook_data["service"], |
| 280 "node": node, | |
| 281 "type": hook_data["type"], | |
| 282 "arg": hook_data["arg"], | |
| 283 "persistent": persistent, | |
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284 } |
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285 ) |
| 2307 | 286 return hooks_list |