Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_exp_pubsub_hook.py @ 4281:9e63e02318ec
core: show warning instead of exception in case of missing dependency when loading plugins
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Fri, 12 Jul 2024 18:53:00 +0200 |
| parents | 0d7bb4df2343 |
| children |
| rev | line source |
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| 3028 | 1 #!/usr/bin/env python3 |
| 3137 | 2 |
| 2307 | 3 |
| 4 # SAT plugin for Pubsub Hooks | |
| 3479 | 5 # Copyright (C) 2009-2021 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 | |
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20 from libervia.backend.core.i18n import _ |
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21 from libervia.backend.core.constants import Const as C |
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22 from libervia.backend.core import exceptions |
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23 from libervia.backend.core.log import getLogger |
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24 from libervia.backend.memory import persistent |
| 2307 | 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 |
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58 self.node_hooks = ( |
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59 {} |
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60 ) # keep track of the number of hooks per node (for all profiles) |
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61 host.bridge.add_method( |
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62 "ps_hook_add", ".plugin", in_sign="ssssbs", out_sign="", method=self._addHook |
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63 ) |
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64 host.bridge.add_method( |
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65 "ps_hook_remove", |
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66 ".plugin", |
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67 in_sign="sssss", |
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68 out_sign="i", |
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69 method=self._removeHook, |
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70 ) |
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71 host.bridge.add_method( |
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72 "ps_hook_list", |
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73 ".plugin", |
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74 in_sign="s", |
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75 out_sign="aa{ss}", |
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76 method=self._list_hooks, |
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77 ) |
| 2307 | 78 |
| 79 @defer.inlineCallbacks | |
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80 def profile_connected(self, client): |
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81 hooks = client._hooks = persistent.PersistentBinaryDict( |
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82 NS_PUBSUB_HOOK, client.profile |
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83 ) |
| 2307 | 84 client._hooks_temporary = {} |
| 85 yield hooks.load() | |
| 86 for node in hooks: | |
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87 self._install_node_manager(client, node) |
| 2307 | 88 |
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89 def profile_disconnected(self, client): |
| 2307 | 90 for node in client._hooks: |
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91 self._remove_node_manager(client, node) |
| 2307 | 92 |
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93 def _install_node_manager(self, client, node): |
| 2307 | 94 if node in self.node_hooks: |
| 3028 | 95 log.debug(_("node manager already set for {node}").format(node=node)) |
| 2307 | 96 self.node_hooks[node] += 1 |
| 97 else: | |
| 98 # first hook on this node | |
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99 self.host.plugins["XEP-0060"].add_managed_node( |
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100 node, items_cb=self._items_received |
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101 ) |
| 2307 | 102 self.node_hooks[node] = 0 |
| 3028 | 103 log.info(_("node manager installed on {node}").format(node=node)) |
| 2307 | 104 |
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105 def _remove_node_manager(self, client, node): |
| 2307 | 106 try: |
| 107 self.node_hooks[node] -= 1 | |
| 108 except KeyError: | |
| 3028 | 109 log.error(_("trying to remove a {node} without hook").format(node=node)) |
| 2307 | 110 else: |
| 111 if self.node_hooks[node] == 0: | |
| 112 del self.node_hooks[node] | |
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113 self.host.plugins["XEP-0060"].remove_managed_node( |
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114 node, self._items_received |
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115 ) |
| 3028 | 116 log.debug(_("hook removed")) |
| 2307 | 117 else: |
| 3028 | 118 log.debug(_("node still needed for an other hook")) |
| 2307 | 119 |
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120 def install_hook(self, client, service, node, hook_type, hook_arg, persistent): |
| 2307 | 121 if hook_type not in HOOK_TYPES: |
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122 raise exceptions.DataError( |
| 3028 | 123 _("{hook_type} is not handled").format(hook_type=hook_type) |
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124 ) |
| 2307 | 125 if hook_type != HOOK_TYPE_PYTHON_FILE: |
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126 raise NotImplementedError( |
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127 _("{hook_type} hook type not implemented yet").format(hook_type=hook_type) |
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128 ) |
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129 self._install_node_manager(client, node) |
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130 hook_data = {"service": service, "type": hook_type, "arg": hook_arg} |
| 2307 | 131 |
| 132 if persistent: | |
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133 hooks_list = client._hooks.setdefault(node, []) |
| 2307 | 134 hooks_list.append(hook_data) |
| 135 client._hooks.force(node) | |
| 136 else: | |
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137 hooks_list = client._hooks_temporary.setdefault(node, []) |
| 2307 | 138 hooks_list.append(hook_data) |
| 139 | |
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140 log.info( |
| 3028 | 141 _("{persistent} hook installed on {node} for {profile}").format( |
| 142 persistent=_("persistent") if persistent else _("temporary"), | |
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143 node=node, |
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144 profile=client.profile, |
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145 ) |
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146 ) |
| 2307 | 147 |
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148 def _items_received(self, client, itemsEvent): |
| 2307 | 149 node = itemsEvent.nodeIdentifier |
| 150 for hooks in (client._hooks, client._hooks_temporary): | |
| 151 if node not in hooks: | |
| 152 continue | |
| 153 hooks_list = hooks[node] | |
| 154 for hook_data in hooks_list[:]: | |
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155 if hook_data["service"] != itemsEvent.sender.userhostJID(): |
| 2307 | 156 continue |
| 157 try: | |
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158 callback = hook_data["callback"] |
| 2307 | 159 except KeyError: |
| 160 # first time we get this hook, we create the callback | |
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161 hook_type = hook_data["type"] |
| 2307 | 162 try: |
| 163 if hook_type == HOOK_TYPE_PYTHON_FILE: | |
| 164 hook_globals = {} | |
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165 exec( |
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166 compile( |
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167 open(hook_data["arg"], "rb").read(), |
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168 hook_data["arg"], |
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169 "exec", |
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170 ), |
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171 hook_globals, |
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172 ) |
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173 callback = hook_globals["hook"] |
| 2307 | 174 else: |
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175 raise NotImplementedError( |
| 3028 | 176 _("{hook_type} hook type not implemented yet").format( |
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177 hook_type=hook_type |
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178 ) |
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179 ) |
| 2307 | 180 except Exception as e: |
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181 log.warning( |
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182 _( |
| 3028 | 183 "Can't load Pubsub hook at node {node}, it will be removed: {reason}" |
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184 ).format(node=node, reason=e) |
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185 ) |
| 2307 | 186 hooks_list.remove(hook_data) |
| 187 continue | |
| 188 | |
| 189 for item in itemsEvent.items: | |
| 190 try: | |
| 191 callback(self.host, client, item) | |
| 192 except Exception as e: | |
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193 log.warning( |
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194 _( |
| 3028 | 195 "Error while running Pubsub hook for node {node}: {msg}" |
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196 ).format(node=node, msg=e) |
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197 ) |
| 2307 | 198 |
| 199 def _addHook(self, service, node, hook_type, hook_arg, persistent, profile): | |
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200 client = self.host.get_client(profile) |
| 2307 | 201 service = jid.JID(service) if service else client.jid.userhostJID() |
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202 return self.add_hook( |
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203 client, |
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204 service, |
| 3028 | 205 str(node), |
| 206 str(hook_type), | |
| 207 str(hook_arg), | |
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208 persistent, |
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209 ) |
| 2307 | 210 |
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211 def add_hook(self, client, service, node, hook_type, hook_arg, persistent): |
| 2307 | 212 r"""Add a hook which will be triggered on a pubsub notification |
| 213 | |
| 214 @param service(jid.JID): service of the node | |
| 215 @param node(unicode): Pubsub node | |
| 216 @param hook_type(unicode): type of the hook, one of: | |
| 217 - HOOK_TYPE_PYTHON: a python module (must be in path) | |
| 218 module must have a "hook" method which will be called | |
| 219 - HOOK_TYPE_PYTHON_FILE: a python file | |
| 220 file must have a "hook" method which will be called | |
| 221 - HOOK_TYPE_PYTHON_CODE: direct python code | |
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222 /!\ Python hooks will be executed in SàT context, |
| 2307 | 223 with host, client and item as arguments, it means that: |
| 224 - they can do whatever they wants, so don't run untrusted hooks | |
| 225 - they MUST NOT BLOCK, they are run in Twisted async environment and blocking would block whole SàT process | |
| 226 - item are domish.Element | |
| 227 @param hook_arg(unicode): argument of the hook, depending on the hook_type | |
| 228 can be a module path, file path, python code | |
| 229 """ | |
| 230 assert service is not None | |
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231 return self.install_hook(client, service, node, hook_type, hook_arg, persistent) |
| 2307 | 232 |
| 233 def _removeHook(self, service, node, hook_type, hook_arg, profile): | |
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234 client = self.host.get_client(profile) |
| 2307 | 235 service = jid.JID(service) if service else client.jid.userhostJID() |
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236 return self.remove_hook( |
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237 client, service, node, hook_type or None, hook_arg or None |
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238 ) |
| 2307 | 239 |
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240 def remove_hook(self, client, service, node, hook_type=None, hook_arg=None): |
| 2307 | 241 """Remove a persistent or temporaty root |
| 242 | |
| 243 @param service(jid.JID): service of the node | |
| 244 @param node(unicode): Pubsub node | |
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245 @param hook_type(unicode, None): same as for [add_hook] |
| 2307 | 246 match all if None |
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247 @param hook_arg(unicode, None): same as for [add_hook] |
| 2307 | 248 match all if None |
| 249 @return(int): number of hooks removed | |
| 250 """ | |
| 251 removed = 0 | |
| 252 for hooks in (client._hooks, client._hooks_temporary): | |
| 253 if node in hooks: | |
| 254 for hook_data in hooks[node]: | |
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255 if ( |
| 3028 | 256 service != hook_data["service"] |
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257 or hook_type is not None |
| 3028 | 258 and hook_type != hook_data["type"] |
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259 or hook_arg is not None |
| 3028 | 260 and hook_arg != hook_data["arg"] |
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261 ): |
| 2307 | 262 continue |
| 263 hooks[node].remove(hook_data) | |
| 264 removed += 1 | |
| 265 if not hooks[node]: | |
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266 # no more hooks, we can remove the node |
| 2307 | 267 del hooks[node] |
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268 self._remove_node_manager(client, node) |
| 2307 | 269 else: |
| 270 if hooks == client._hooks: | |
| 271 hooks.force(node) | |
| 272 return removed | |
| 273 | |
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274 def _list_hooks(self, profile): |
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275 hooks_list = self.list_hooks(self.host.get_client(profile)) |
| 2307 | 276 for hook in hooks_list: |
| 3028 | 277 hook["service"] = hook["service"].full() |
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278 hook["persistent"] = C.bool_const(hook["persistent"]) |
| 2307 | 279 return hooks_list |
| 280 | |
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281 def list_hooks(self, client): |
| 2307 | 282 """return list of registered hooks""" |
| 283 hooks_list = [] | |
| 284 for hooks in (client._hooks, client._hooks_temporary): | |
| 285 persistent = hooks is client._hooks | |
| 3028 | 286 for node, hooks_data in hooks.items(): |
| 2307 | 287 for hook_data in hooks_data: |
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288 hooks_list.append( |
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289 { |
| 3028 | 290 "service": hook_data["service"], |
| 291 "node": node, | |
| 292 "type": hook_data["type"], | |
| 293 "arg": hook_data["arg"], | |
| 294 "persistent": persistent, | |
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295 } |
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296 ) |
| 2307 | 297 return hooks_list |