Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0071.py @ 4351:6a0a081485b8

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plugin autocrypt: Autocrypt protocol implementation: Implementation of autocrypt: `autocrypt` header is checked, and if present and no public key is known for the peer, the key is imported. `autocrypt` header is also added to outgoing message (only if an email gateway is detected). For the moment, the JID is use as identifier, but the real email used by gateway should be used in the future. rel 456
author Goffi <goffi@goffi.org>
date Fri, 28 Feb 2025 09:23:35 +0100
parents 0d7bb4df2343
children
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rev   line source
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT plugin for Publish-Subscribe (xep-0071)
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5 # Copyright (C) 2009-2021 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 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
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25 log = getLogger(__name__)
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26 from libervia.backend.tools.common import data_format
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27
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28 from twisted.internet import defer
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29 from wokkel import disco, iwokkel
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30 from zope.interface import implementer
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31
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32 # from lxml import etree
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33 try:
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34 from lxml import html
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35 except ImportError:
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36 raise exceptions.MissingModule(
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37 "Missing module lxml, please download/install it from http://lxml.de/"
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38 )
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39 try:
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40 from twisted.words.protocols.xmlstream import XMPPHandler
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41 except ImportError:
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42 from wokkel.subprotocols import XMPPHandler
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43
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44 NS_XHTML_IM = "http://jabber.org/protocol/xhtml-im"
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45 NS_XHTML = "http://www.w3.org/1999/xhtml"
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46
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47 PLUGIN_INFO = {
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48 C.PI_NAME: "XHTML-IM Plugin",
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49 C.PI_IMPORT_NAME: "XEP-0071",
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50 C.PI_TYPE: "XEP",
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51 C.PI_PROTOCOLS: ["XEP-0071"],
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52 C.PI_DEPENDENCIES: ["TEXT_SYNTAXES"],
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53 C.PI_MAIN: "XEP_0071",
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54 C.PI_HANDLER: "yes",
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55 C.PI_DESCRIPTION: _("""Implementation of XHTML-IM"""),
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56 }
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57
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58 allowed = {
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59 "a": set(["href", "style", "type"]),
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60 "blockquote": set(["style"]),
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61 "body": set(["style"]),
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62 "br": set([]),
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63 "cite": set(["style"]),
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64 "em": set([]),
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65 "img": set(["alt", "height", "src", "style", "width"]),
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66 "li": set(["style"]),
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67 "ol": set(["style"]),
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68 "p": set(["style"]),
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69 "span": set(["style"]),
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70 "strong": set([]),
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71 "ul": set(["style"]),
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72 }
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73
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74 styles_allowed = [
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75 "background-color",
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76 "color",
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77 "font-family",
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78 "font-size",
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79 "font-style",
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80 "font-weight",
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81 "margin-left",
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82 "margin-right",
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83 "text-align",
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84 "text-decoration",
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85 ]
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86
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87 blacklist = ["script"] # tag that we have to kill (we don't keep content)
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88
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89
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90 class XEP_0071(object):
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91 SYNTAX_XHTML_IM = "XHTML-IM"
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92
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93 def __init__(self, host):
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94 log.info(_("XHTML-IM plugin initialization"))
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95 self.host = host
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96 self._s = self.host.plugins["TEXT_SYNTAXES"]
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97 self._s.add_syntax(
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98 self.SYNTAX_XHTML_IM,
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99 lambda xhtml: xhtml,
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100 self.XHTML2XHTML_IM,
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101 [self._s.OPT_HIDDEN],
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102 )
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103 host.trigger.add("message_received", self.message_received_trigger)
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104 host.trigger.add("sendMessage", self.send_message_trigger)
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105
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106 def get_handler(self, client):
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107 return XEP_0071_handler(self)
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108
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109 def _message_post_treat(self, data, message_elt, body_elts, client):
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110 """Callback which manage the post treatment of the message in case of XHTML-IM found
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111
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112 @param data: data send by message_received trigger through post_treat deferred
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113 @param message_elt: whole <message> stanza
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114 @param body_elts: XHTML-IM body elements found
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115 @return: the data with the extra parameter updated
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116 """
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117
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118 # TODO: check if text only body is empty, then try to convert XHTML-IM to pure text and show a warning message
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119 def converted(xhtml, lang):
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120 if lang:
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121 data["extra"]["xhtml_{}".format(lang)] = xhtml
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122 else:
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123 data["extra"]["xhtml"] = xhtml
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124
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125 defers = []
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126 for body_elt in body_elts:
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127 lang = body_elt.getAttribute((C.NS_XML, "lang"), "")
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128 treat_d = defer.succeed(None) #  deferred used for treatments
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129 if self.host.trigger.point(
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130 "xhtml_post_treat", client, message_elt, body_elt, lang, treat_d
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131 ):
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132 continue
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133 treat_d.addCallback(
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134 lambda __: self._s.convert(
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135 body_elt.toXml(), self.SYNTAX_XHTML_IM, safe=True
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
136 )
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
137 )
2110
2d633b3c923d plugin XEP-0231: Bits of Binary first draft:
Goffi <goffi@goffi.org>
parents: 2080
diff changeset
138 treat_d.addCallback(converted, lang)
2d633b3c923d plugin XEP-0231: Bits of Binary first draft:
Goffi <goffi@goffi.org>
parents: 2080
diff changeset
139 defers.append(treat_d)
1955
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parents: 1934
diff changeset
140
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
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parents: 1934
diff changeset
141 d_list = defer.DeferredList(defers)
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378188abe941 misc: replaced all "dummy" by the more conventional and readable "__" ("_" being used for gettext)
Goffi <goffi@goffi.org>
parents: 2624
diff changeset
142 d_list.addCallback(lambda __: data)
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
143 return d_list
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
144
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3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
145 def _fill_body_text(self, text, data, lang):
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56f94936df1e code style reformatting using black
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parents: 2562
diff changeset
146 data["message"][lang or ""] = text
56f94936df1e code style reformatting using black
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parents: 2562
diff changeset
147 message_elt = data["xml"]
2080
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
148 body_elt = message_elt.addElement("body", content=text)
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
149 if lang:
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diff changeset
150 body_elt[(C.NS_XML, "lang")] = lang
2080
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parents: 1963
diff changeset
151
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
152 def _check_body_text(self, data, lang, markup, syntax, defers):
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
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parents: 1963
diff changeset
153 """check if simple text message exists, and fill if needed"""
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parents: 2562
diff changeset
154 if not (lang or "") in data["message"]:
2080
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
155 d = self._s.convert(markup, syntax, self._s.SYNTAX_TEXT)
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
156 d.addCallback(self._fill_body_text, data, lang)
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
157 defers.append(d)
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
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parents: 1963
diff changeset
158
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parents: 3479
diff changeset
159 def _send_message_add_rich(self, data, client):
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parents: 4071
diff changeset
160 """Construct XHTML-IM node and add it XML element
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
161
2144
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parents: 2110
diff changeset
162 @param data: message data as sended by sendMessage callback
702
a25db3fe3959 plugin XEP-0071: rich messages management for sendMessage
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parents: 701
diff changeset
163 """
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
164 # at this point, either ['extra']['rich'] or ['extra']['xhtml'] exists
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parents: 1934
diff changeset
165 # but both can't exist at the same time
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parents: 2562
diff changeset
166 message_elt = data["xml"]
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
167 html_elt = message_elt.addElement((NS_XHTML_IM, "html"))
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
168
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
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parents: 1934
diff changeset
169 def syntax_converted(xhtml_im, lang):
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parents: 2562
diff changeset
170 body_elt = html_elt.addElement((NS_XHTML, "body"))
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
171 if lang:
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
172 body_elt[(C.NS_XML, "lang")] = lang
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
173 data["extra"]["xhtml_{}".format(lang)] = xhtml_im
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
174 else:
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parents: 2562
diff changeset
175 data["extra"]["xhtml"] = xhtml_im
702
a25db3fe3959 plugin XEP-0071: rich messages management for sendMessage
Goffi <goffi@goffi.org>
parents: 701
diff changeset
176 body_elt.addRawXml(xhtml_im)
a25db3fe3959 plugin XEP-0071: rich messages management for sendMessage
Goffi <goffi@goffi.org>
parents: 701
diff changeset
177
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parents: 3479
diff changeset
178 syntax = self._s.get_current_syntax(client.profile)
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
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parents: 1934
diff changeset
179 defers = []
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ab2696e34d29 Python 3 port:
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parents: 2780
diff changeset
180 if "xhtml" in data["extra"]:
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
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parents: 1934
diff changeset
181 # we have directly XHTML
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524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
182 for lang, xhtml in data_format.get_sub_dict("xhtml", data["extra"]):
2080
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
183 self._check_body_text(data, lang, xhtml, self._s.SYNTAX_XHTML, defers)
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
184 d = self._s.convert(xhtml, self._s.SYNTAX_XHTML, self.SYNTAX_XHTML_IM)
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
185 d.addCallback(syntax_converted, lang)
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
186 defers.append(d)
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2780
diff changeset
187 elif "rich" in data["extra"]:
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
188 # we have rich syntax to convert
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
189 for lang, rich_data in data_format.get_sub_dict("rich", data["extra"]):
2080
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
190 self._check_body_text(data, lang, rich_data, syntax, defers)
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
191 d = self._s.convert(rich_data, syntax, self.SYNTAX_XHTML_IM)
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
192 d.addCallback(syntax_converted, lang)
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
193 defers.append(d)
2080
3626b2813158 plugin XEP-0071: fixed rich and xhtml sending + add simple text body if not present
Goffi <goffi@goffi.org>
parents: 1963
diff changeset
194 else:
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2780
diff changeset
195 exceptions.InternalError("xhtml or rich should be present at this point")
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
196 d_list = defer.DeferredList(defers)
2765
378188abe941 misc: replaced all "dummy" by the more conventional and readable "__" ("_" being used for gettext)
Goffi <goffi@goffi.org>
parents: 2624
diff changeset
197 d_list.addCallback(lambda __: data)
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
198 return d_list
702
a25db3fe3959 plugin XEP-0071: rich messages management for sendMessage
Goffi <goffi@goffi.org>
parents: 701
diff changeset
199
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
200 def message_received_trigger(self, client, message, post_treat):
4270
0d7bb4df2343 Reformatted code base using black.
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parents: 4071
diff changeset
201 """Check presence of XHTML-IM in message"""
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
202 try:
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2780
diff changeset
203 html_elt = next(message.elements(NS_XHTML_IM, "html"))
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
204 except StopIteration:
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
205 # No XHTML-IM
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
206 pass
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
207 else:
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
208 body_elts = html_elt.elements(NS_XHTML, "body")
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
209 post_treat.addCallback(self._message_post_treat, message, body_elts, client)
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
210 return True
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
211
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
212 def send_message_trigger(self, client, data, pre_xml_treatments, post_xml_treatments):
4270
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
213 """Check presence of rich text in extra"""
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
214 rich = {}
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
215 xhtml = {}
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2780
diff changeset
216 for key, value in data["extra"].items():
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
217 if key.startswith("rich"):
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
218 rich[key[5:]] = value
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
219 elif key.startswith("xhtml"):
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
220 xhtml[key[6:]] = value
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
221 if rich and xhtml:
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
222 raise exceptions.DataError(
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2780
diff changeset
223 _("Can't have XHTML and rich content at the same time")
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
224 )
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
225 if rich or xhtml:
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
226 if rich:
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
227 data["rich"] = rich
1955
633b5c21aefd backend, frontend: messages refactoring (huge commit, not finished):
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
228 else:
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
229 data["xhtml"] = xhtml
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
230 post_xml_treatments.addCallback(self._send_message_add_rich, client)
702
a25db3fe3959 plugin XEP-0071: rich messages management for sendMessage
Goffi <goffi@goffi.org>
parents: 701
diff changeset
231 return True
a25db3fe3959 plugin XEP-0071: rich messages management for sendMessage
Goffi <goffi@goffi.org>
parents: 701
diff changeset
232
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
233 def _purge_style(self, styles_raw):
4270
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
234 """Remove unauthorised styles according to the XEP-0071
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
235 @param styles_raw: raw styles (value of the style attribute)
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
236 """
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
237 purged = []
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
238
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
239 styles = [style.strip().split(":") for style in styles_raw.split(";")]
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
240
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
241 for style_tuple in styles:
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
242 if len(style_tuple) != 2:
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
243 continue
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
244 name, value = style_tuple
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
245 name = name.strip()
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
246 if name not in styles_allowed:
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
247 continue
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
248 purged.append((name, value.strip()))
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
249
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2780
diff changeset
250 return "; ".join(["%s: %s" % data for data in purged])
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
251
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
252 def XHTML2XHTML_IM(self, xhtml):
4270
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Goffi <goffi@goffi.org>
parents: 4071
diff changeset
253 """Convert XHTML document to XHTML_IM subset
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
254 @param xhtml: raw xhtml to convert
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
255 """
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
256 # TODO: more clever tag replacement (replace forbidden tags with equivalents when possible)
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
257
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
258 parser = html.HTMLParser(remove_comments=True, encoding="utf-8")
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
259 root = html.fromstring(xhtml, parser=parser)
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
260 body_elt = root.find("body")
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
261 if body_elt is None:
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
262 # we use the whole XML as body if no body element is found
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
263 body_elt = html.Element("body")
668
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
264 body_elt.append(root)
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
265 else:
7bb50096d225 plugin XEP_0071: first draft
Goffi <goffi@goffi.org>
parents:
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266 body_elt.attrib.clear()
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267
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268 allowed_tags = list(allowed.keys())
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269 to_strip = []
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270 for elem in body_elt.iter():
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271 if elem.tag not in allowed_tags:
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272 to_strip.append(elem)
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273 else:
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274 # we remove unallowed attributes
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275 attrib = elem.attrib
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276 att_to_remove = set(attrib).difference(allowed[elem.tag])
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277 for att in att_to_remove:
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278 del attrib[att]
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279 if "style" in attrib:
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280 attrib["style"] = self._purge_style(attrib["style"])
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281
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282 for elem in to_strip:
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283 if elem.tag in blacklist:
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284 # we need to remove the element and all descendants
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285 log.debug("removing black listed tag: %s" % (elem.tag))
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286 elem.drop_tree()
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287 else:
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288 elem.drop_tag()
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289 if len(body_elt) != 1:
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290 root_elt = body_elt
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291 body_elt.tag = "p"
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292 else:
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293 root_elt = body_elt[0]
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294
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295 return html.tostring(root_elt, encoding="unicode", method="xml")
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296
668
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297
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298 @implementer(iwokkel.IDisco)
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299 class XEP_0071_handler(XMPPHandler):
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300
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301 def __init__(self, plugin_parent):
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302 self.plugin_parent = plugin_parent
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303 self.host = plugin_parent.host
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304
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305 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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306 return [disco.DiscoFeature(NS_XHTML_IM)]
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307
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308 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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309 return []