Mercurial > libervia-backend

annotate sat/plugins/plugin_misc_attach.py @ 3231:e756e0eb1be4

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core (memory/encryption): automatic start encryption if peer send encrypted message: If peer sends encrypted message and we have no encryption activated, we automatically start encryption to avoid sending plain text message when answering. markAsEncrypted now needs the encryption algorithm namespace as mandatory argument.
author Goffi <goffi@goffi.org>
date Mon, 23 Mar 2020 17:52:18 +0100
parents 163014f09bf4
children be6d91572633
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python3
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2
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3 # SàT plugin for attaching files
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4 # Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 from pathlib import Path
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20 from collections import namedtuple
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21 from twisted.internet import defer
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22 import mimetypes
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23 import tempfile
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24 import shutil
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25 from sat.core.i18n import _
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26 from sat.core import exceptions
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27 from sat.core.constants import Const as C
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28 from sat.core.log import getLogger
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29 from sat.tools import utils
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30 from sat.tools import image
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31
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32
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33 log = getLogger(__name__)
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34
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35
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36 PLUGIN_INFO = {
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37 C.PI_NAME: "File Attach",
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38 C.PI_IMPORT_NAME: "ATTACH",
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39 C.PI_TYPE: C.PLUG_TYPE_MISC,
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40 C.PI_DEPENDENCIES: ["UPLOAD"],
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41 C.PI_MAIN: "AttachPlugin",
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42 C.PI_HANDLER: "no",
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43 C.PI_DESCRIPTION: _("""Attachments handler"""),
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44 }
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45
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46
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47 AttachmentHandler = namedtuple('AttachmentHandler', ['can_handle', 'attach', 'priority'])
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48
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49
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50 class AttachPlugin:
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51
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52 def __init__(self, host):
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53 log.info(_("plugin Attach initialization"))
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54 self.host = host
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55 self._u = host.plugins["UPLOAD"]
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56 host.trigger.add("sendMessage", self._sendMessageTrigger)
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57 self._attachments_handlers = {'clear': [], 'encrypted': []}
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58 self.register(self.defaultCanHandle, self.defaultAttach, False, -1000)
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59
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60 def register(self, can_handle, attach, encrypted=False, priority=0):
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61 """Register an attachments handler
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62
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63 @param can_handle(callable, coroutine, Deferred): a method which must return True
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64 if this plugin can handle the upload, otherwise next ones will be tried.
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65 This method will get client and mess_data as arguments, before the XML is
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66 generated
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67 @param attach(callable, coroutine, Deferred): attach the file
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68 this method will get client and mess_data as arguments, after XML is
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69 generated. Upload operation must be handled
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70 hint: "UPLOAD" plugin can be used
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71 @param encrypted(bool): True if the handler manages encrypted files
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72 A handler can be registered twice if it handle both encrypted and clear
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73 attachments
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74 @param priority(int): priority of this handler, handler with higher priority will
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75 be tried first
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76 """
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77 handler = AttachmentHandler(can_handle, attach, priority)
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78 handlers = (
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79 self._attachments_handlers['encrypted']
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80 if encrypted else self._attachments_handlers['clear']
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81 )
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82 if handler in handlers:
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83 raise exceptions.InternalError(
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84 'Attachment handler has been registered twice, this should never happen'
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85 )
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86
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87 handlers.append(handler)
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88 handlers.sort(key=lambda h: h.priority, reverse=True)
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89 log.debug(f"new attachments handler: {handler}")
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90
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91 async def attachFiles(self, client, data):
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92 """Main method to attach file
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93
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94 It will do generic pre-treatment, and call the suitable attachments handler
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95 """
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96 # we check attachment for pre-treatment like large image resizing
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97 # media_type will be added if missing (and if it can be guessed from path)
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98 attachments = data["extra"][C.MESS_KEY_ATTACHMENTS]
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99 tmp_dirs_to_clean = []
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100 for attachment in attachments:
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101 if attachment.get(C.MESS_KEY_ATTACHMENTS_RESIZE, False):
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102 path = Path(attachment["path"])
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103 try:
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104 media_type = attachment[C.MESS_KEY_ATTACHMENTS_MEDIA_TYPE]
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105 except KeyError:
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106 media_type = mimetypes.guess_type(path, strict=False)[0]
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107 if media_type is None:
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108 log.warning(
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109 _("Can't resize attachment of unknown type: {attachment}")
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110 .format(attachment=attachment))
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111 continue
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112 attachment[C.MESS_KEY_ATTACHMENTS_MEDIA_TYPE] = media_type
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113
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114 main_type = media_type.split('/')[0]
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115 if main_type == "image":
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116 report = image.check(self.host, path)
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117 if report['too_large']:
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118 tmp_dir = Path(tempfile.mkdtemp())
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119 tmp_dirs_to_clean.append(tmp_dir)
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120 new_path = tmp_dir / path.name
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121 await image.resize(
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122 path, report["recommended_size"], dest=new_path)
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123 attachment["path"] = new_path
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124 log.info(
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125 _("Attachment {path!r} has been resized at {new_path!r}")
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126 .format(path=str(path), new_path=str(new_path)))
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127 else:
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128 log.warning(
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129 _("Can't resize attachment of type {main_type!r}: {attachment}")
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130 .format(main_type=main_type, attachment=attachment))
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131
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132 if client.encryption.isEncryptionRequested(data):
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133 handlers = self._attachments_handlers['encrypted']
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134 else:
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135 handlers = self._attachments_handlers['clear']
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136
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137 for handler in handlers:
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138 can_handle = await utils.asDeferred(handler.can_handle, client, data)
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139 if can_handle:
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140 break
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141 else:
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142 raise exceptions.NotFound(
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143 _("No plugin can handle attachment with {destinee}").format(
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144 destinee = data['to']
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145 ))
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146
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147 await utils.asDeferred(handler.attach, client, data)
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148
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149 for dir_path in tmp_dirs_to_clean:
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150 log.debug(f"Cleaning temporary directory at {dir_path}")
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151 shutil.rmtree(dir_path)
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152
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153 return data
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154
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155 async def uploadFiles(self, client, data, upload_cb=None):
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156 """Upload file, and update attachments
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157
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158 invalid attachments will be removed
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159 @param client:
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160 @param data(dict): message data
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161 @param upload_cb(coroutine, Deferred, None): method to use for upload
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162 if None, upload method from UPLOAD plugin will be used.
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163 Otherwise, following kwargs will be use with the cb:
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164 - client
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165 - filepath
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166 - filename
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167 - options
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168 the method must return a tuple similar to UPLOAD plugin's upload method,
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169 it must contain:
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170 - progress_id
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171 - a deferred which fire download URL
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172 """
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173 if upload_cb is None:
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174 upload_cb = self._u.upload
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175
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176 uploads_d = []
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177 to_delete = []
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178 attachments = data["extra"]["attachments"]
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179
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180 for attachment in attachments:
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181 try:
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182 # we pop path because we don't want it to be stored, as the image can be
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183 # only in a temporary location
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184 path = Path(attachment.pop("path"))
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185 except KeyError:
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186 log.warning("no path in attachment: {attachment}")
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187 to_delete.append(attachment)
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188 continue
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189
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190 if "url" in attachment:
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191 url = attachment.pop('url')
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192 log.warning(
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193 f"unexpected URL in attachment: {url!r}\nattachment: {attachment}"
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194 )
3181
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195
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196 try:
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197 name = attachment["name"]
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198 except KeyError:
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199 name = attachment["name"] = path.name
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200
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201 options = {}
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202 progress_id = attachment.pop("progress_id", None)
3182
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203 if progress_id:
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204 options["progress_id"] = progress_id
3192
883fb4981958 plugin attach: disable TLS check if "check_certificate" is disabled
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parents: 3182
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205 check_certificate = self.host.memory.getParamA(
883fb4981958 plugin attach: disable TLS check if "check_certificate" is disabled
Goffi <goffi@goffi.org>
parents: 3182
diff changeset
206 "check_certificate", "Connection", profile_key=client.profile)
883fb4981958 plugin attach: disable TLS check if "check_certificate" is disabled
Goffi <goffi@goffi.org>
parents: 3182
diff changeset
207 if not check_certificate:
883fb4981958 plugin attach: disable TLS check if "check_certificate" is disabled
Goffi <goffi@goffi.org>
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diff changeset
208 options['ignore_tls_errors'] = True
883fb4981958 plugin attach: disable TLS check if "check_certificate" is disabled
Goffi <goffi@goffi.org>
parents: 3182
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209 log.warning(
883fb4981958 plugin attach: disable TLS check if "check_certificate" is disabled
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210 _("certificate check disabled for upload, this is dangerous!"))
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211
3219
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diff changeset
212 __, upload_d = await upload_cb(
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diff changeset
213 client=client,
3181
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214 filepath=path,
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215 filename=name,
3182
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diff changeset
216 options=options,
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217 )
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218 uploads_d.append(upload_d)
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219
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220 for attachment in to_delete:
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221 attachments.remove(attachment)
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222
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223 upload_results = await defer.DeferredList(uploads_d)
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224 for idx, (success, ret) in enumerate(upload_results):
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225 attachment = attachments[idx]
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226
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227 if not success:
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228 # ret is a failure here
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229 log.warning(f"error while uploading {attachment}: {ret}")
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230 continue
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231
5ff2cf7f0aba plugin attach: first draft:
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232 attachment["url"] = ret
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233
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234 return data
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235
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diff changeset
236 def _attachFiles(self, data, client):
3219
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diff changeset
237 return defer.ensureDeferred(self.attachFiles(client, data))
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238
5ff2cf7f0aba plugin attach: first draft:
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239 def _sendMessageTrigger(
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240 self, client, mess_data, pre_xml_treatments, post_xml_treatments):
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241 if mess_data['extra'].get(C.MESS_KEY_ATTACHMENTS):
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diff changeset
242 post_xml_treatments.addCallback(self._attachFiles, client=client)
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243 return True
3219
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diff changeset
244
2ba602aef90e plugin attach, aesgcm: attachments refactoring:
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diff changeset
245 async def defaultCanHandle(self, client, data):
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diff changeset
246 return True
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diff changeset
247
2ba602aef90e plugin attach, aesgcm: attachments refactoring:
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diff changeset
248 async def defaultAttach(self, client, data):
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diff changeset
249 await self.uploadFiles(client, data)
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250 # TODO: handle xhtml-im
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diff changeset
251 body_elt = next(data["xml"].elements((C.NS_CLIENT, "body")))
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diff changeset
252 attachments = data["extra"][C.MESS_KEY_ATTACHMENTS]
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diff changeset
253 if attachments:
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diff changeset
254 body_links = '\n'.join(a['url'] for a in attachments)
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diff changeset
255 if str(body_elt).strip():
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diff changeset
256 # if there is already a body, we add a line feed before the first link
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diff changeset
257 body_elt.addContent('\n')
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diff changeset
258 body_elt.addContent(body_links)