Mercurial > libervia-backend
view sat/plugins/plugin_xep_0106.py @ 3080:16925f494820
plugin XEP-0045: don't fail on `item-not-found` with MAM:
Some servers don't store permanently the whole history of MUC with MAM. As a result, an
"item-not-found" stanza error can be received when message id used as reference doesn't exist
anymore on the server.
When this case happens, the history is retrieved in the same way as for a newly joined room
(i.e. last 50 messages are requested).
author | Goffi <goffi@goffi.org> |
---|---|
date | Thu, 05 Dec 2019 23:05:16 +0100 |
parents | ab2696e34d29 |
children | 9d0df638c8b4 |
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#!/usr/bin/env python3 # -*- coding: utf-8 -*- # SAT plugin for Explicit Message Encryption # Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org) # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. from sat.core.i18n import _ from sat.core.constants import Const as C from sat.core.log import getLogger from twisted.words.protocols.jabber import xmlstream from zope.interface import implementer from wokkel import disco log = getLogger(__name__) PLUGIN_INFO = { C.PI_NAME: "JID Escaping", C.PI_IMPORT_NAME: "XEP-0106", C.PI_TYPE: "XEP", C.PI_MODES: C.PLUG_MODE_BOTH, C.PI_PROTOCOLS: ["XEP-0106"], C.PI_DEPENDENCIES: [], C.PI_MAIN: "XEP_0106", C.PI_HANDLER: "yes", C.PI_DESCRIPTION: _("""(Un)escape JID to use disallowed chars in local parts"""), } NS_JID_ESCAPING = r"jid\20escaping" ESCAPE_MAP = { ' ': r'\20', '"': r'\22', '&': r'\26', "'": r'\27', '/': r'\2f', ':': r'\3a', '<': r'\3c', '>': r'\3e', '@': r'\40', '\\': r'\5c', } class XEP_0106(object): def __init__(self, host): self.reverse_map = {v:k for k,v in ESCAPE_MAP.items()} def getHandler(self, client): return XEP_0106_handler() def escape(self, text): """Escape text @param text(unicode): text to escape @return (unicode): escaped text @raise ValueError: text can't be escaped """ if not text or text[0] == ' ' or text[-1] == ' ': raise ValueError("text must not be empty, or start or end with a whitespace") escaped = [] for c in text: if c in ESCAPE_MAP: escaped.append(ESCAPE_MAP[c]) else: escaped.append(c) return ''.join(escaped) def unescape(self, escaped): """Unescape text @param escaped(unicode): text to unescape @return (unicode): unescaped text @raise ValueError: text can't be unescaped """ if not escaped or escaped.startswith(r'\27') or escaped.endswith(r'\27'): raise ValueError("escaped value must not be empty, or start or end with a " "whitespace") unescaped = [] idx = 0 while idx < len(escaped): char_seq = escaped[idx:idx+3] if char_seq in self.reverse_map: unescaped.append(self.reverse_map[char_seq]) idx += 3 else: unescaped.append(escaped[idx]) idx += 1 return ''.join(unescaped) @implementer(disco.IDisco) class XEP_0106_handler(xmlstream.XMPPHandler): def getDiscoInfo(self, requestor, target, nodeIdentifier=""): return [disco.DiscoFeature(NS_JID_ESCAPING)] def getDiscoItems(self, requestor, target, nodeIdentifier=""): return []