Mercurial > libervia-backend
annotate sat/plugins/plugin_exp_pubsub_hook.py @ 2641:b42aa52d2621 0.7.0a2
0.7.0a2 release
author | Goffi <goffi@goffi.org> |
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date | Sun, 08 Jul 2018 18:38:29 +0200 |
parents | 56f94936df1e |
children | 003b8b4b56a7 |
rev | line source |
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2307 | 1 #!/usr/bin/env python2 |
2 # -*- coding: utf-8 -*- | |
3 | |
4 # SAT plugin for Pubsub Hooks | |
2483 | 5 # Copyright (C) 2009-2018 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 |
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46 HOOK_TYPE_PYTHON = u"python" |
2307 | 47 # python file path |
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48 HOOK_TYPE_PYTHON_FILE = u"python_file" |
2307 | 49 # python code directly |
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50 HOOK_TYPE_PYTHON_CODE = u"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): | |
56 log.info(_(u"PubSub Hook initialization")) | |
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: | |
93 log.debug(_(u"node manager already set for {node}").format(node=node)) | |
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 |
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101 log.info(_(u"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: | |
107 log.error(_(u"trying to remove a {node} without hook").format(node=node)) | |
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) |
2307 | 112 log.debug(_(u"hook removed")) |
113 else: | |
114 log.debug(_(u"node still needed for an other hook")) | |
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( |
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119 _(u"{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( |
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123 _(u"{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( |
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139 _(u"{persistent} hook installed on {node} for {profile}").format( |
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140 persistent=_(u"persistent") if persistent else _(u"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 = {} | |
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163 execfile(hook_data["arg"], hook_globals) |
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164 callback = hook_globals["hook"] |
2307 | 165 else: |
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166 raise NotImplementedError( |
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167 _(u"{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 _( |
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174 u"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 _( |
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186 u"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, |
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196 unicode(node), |
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197 unicode(hook_type), |
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198 unicode(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 ( |
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245 service != hook_data[u"service"] |
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246 or hook_type is not None |
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247 and hook_type != hook_data[u"type"] |
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248 or hook_arg is not None |
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249 and hook_arg != hook_data[u"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: | |
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266 hook[u"service"] = hook[u"service"].full() |
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267 hook[u"persistent"] = C.boolConst(hook[u"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 | |
275 for node, hooks_data in hooks.iteritems(): | |
276 for hook_data in hooks_data: | |
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277 hooks_list.append( |
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278 { |
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279 u"service": hook_data[u"service"], |
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280 u"node": node, |
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281 u"type": hook_data[u"type"], |
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282 u"arg": hook_data[u"arg"], |
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283 u"persistent": persistent, |
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284 } |
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285 ) |
2307 | 286 return hooks_list |