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annotate sat/plugins/plugin_xep_0106.py @ 3120:0c29155ac68b

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core: backend autoconnection: A new Connection/autoconnect_backend param can be set for a profile or component to be started automatically with backend. This is specially useful for components, but can be useful for client profile too (e.g. on Android we need to start profile with backend to get notifications, this part will come with following commits). The new Sqlite.getIndParamValues method allows to retrieve the same parameters for all profiles.
author Goffi <goffi@goffi.org>
date Sat, 25 Jan 2020 21:08:32 +0100
parents ab2696e34d29
children 9d0df638c8b4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for Explicit Message Encryption
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5 # Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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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 from twisted.words.protocols.jabber import xmlstream
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24 from zope.interface import implementer
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25 from wokkel import disco
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26
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27 log = getLogger(__name__)
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28
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29 PLUGIN_INFO = {
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30 C.PI_NAME: "JID Escaping",
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31 C.PI_IMPORT_NAME: "XEP-0106",
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32 C.PI_TYPE: "XEP",
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33 C.PI_MODES: C.PLUG_MODE_BOTH,
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34 C.PI_PROTOCOLS: ["XEP-0106"],
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35 C.PI_DEPENDENCIES: [],
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36 C.PI_MAIN: "XEP_0106",
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37 C.PI_HANDLER: "yes",
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38 C.PI_DESCRIPTION: _("""(Un)escape JID to use disallowed chars in local parts"""),
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39 }
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40
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41 NS_JID_ESCAPING = r"jid\20escaping"
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42 ESCAPE_MAP = {
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43 ' ': r'\20',
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44 '"': r'\22',
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45 '&': r'\26',
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46 "'": r'\27',
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47 '/': r'\2f',
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48 ':': r'\3a',
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49 '<': r'\3c',
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50 '>': r'\3e',
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51 '@': r'\40',
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52 '\\': r'\5c',
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53 }
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54
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55
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56 class XEP_0106(object):
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57
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58 def __init__(self, host):
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59 self.reverse_map = {v:k for k,v in ESCAPE_MAP.items()}
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60
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61 def getHandler(self, client):
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62 return XEP_0106_handler()
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63
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64 def escape(self, text):
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65 """Escape text
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66
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67 @param text(unicode): text to escape
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68 @return (unicode): escaped text
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69 @raise ValueError: text can't be escaped
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70 """
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71 if not text or text[0] == ' ' or text[-1] == ' ':
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72 raise ValueError("text must not be empty, or start or end with a whitespace")
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73 escaped = []
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74 for c in text:
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75 if c in ESCAPE_MAP:
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76 escaped.append(ESCAPE_MAP[c])
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77 else:
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78 escaped.append(c)
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79 return ''.join(escaped)
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80
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81 def unescape(self, escaped):
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82 """Unescape text
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83
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84 @param escaped(unicode): text to unescape
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85 @return (unicode): unescaped text
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86 @raise ValueError: text can't be unescaped
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87 """
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88 if not escaped or escaped.startswith(r'\27') or escaped.endswith(r'\27'):
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89 raise ValueError("escaped value must not be empty, or start or end with a "
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90 "whitespace")
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91 unescaped = []
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92 idx = 0
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93 while idx < len(escaped):
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94 char_seq = escaped[idx:idx+3]
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95 if char_seq in self.reverse_map:
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96 unescaped.append(self.reverse_map[char_seq])
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97 idx += 3
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98 else:
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99 unescaped.append(escaped[idx])
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100 idx += 1
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101 return ''.join(unescaped)
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102
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103
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104 @implementer(disco.IDisco)
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105 class XEP_0106_handler(xmlstream.XMPPHandler):
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106
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107 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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108 return [disco.DiscoFeature(NS_JID_ESCAPING)]
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109
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110 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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111 return []