annotate libervia/backend/plugins/plugin_misc_attach.py @ 4272:89a0999884ac

cli (list/set): add "--comments" argument.
author Goffi <goffi@goffi.org>
date Thu, 20 Jun 2024 14:46:55 +0200
parents 0d7bb4df2343
children
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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) 2009-2021 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 collections import namedtuple
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20 import mimetypes
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21 from pathlib import Path
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22 import shutil
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23 import tempfile
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24 from typing import Callable, Optional
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25
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26 from twisted.internet import defer
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27
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28 from libervia.backend.core import exceptions
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29 from libervia.backend.core.constants import Const as C
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30 from libervia.backend.core.core_types import SatXMPPEntity
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31 from libervia.backend.core.i18n import _
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32 from libervia.backend.core.log import getLogger
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33 from libervia.backend.tools import utils
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34 from libervia.backend.tools import image
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35
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37 log = getLogger(__name__)
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39
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40 PLUGIN_INFO = {
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41 C.PI_NAME: "File Attach",
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42 C.PI_IMPORT_NAME: "ATTACH",
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43 C.PI_TYPE: C.PLUG_TYPE_MISC,
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44 C.PI_MODES: C.PLUG_MODE_BOTH,
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45 C.PI_DEPENDENCIES: ["UPLOAD"],
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46 C.PI_MAIN: "AttachPlugin",
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47 C.PI_HANDLER: "no",
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48 C.PI_DESCRIPTION: _("""Attachments handler"""),
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49 }
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50
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51
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52 AttachmentHandler = namedtuple("AttachmentHandler", ["can_handle", "attach", "priority"])
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53
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54
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55 class AttachPlugin:
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56
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57 def __init__(self, host):
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58 log.info(_("plugin Attach initialization"))
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59 self.host = host
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60 self._u = host.plugins["UPLOAD"]
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61 host.trigger.add("sendMessage", self._send_message_trigger)
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62 host.trigger.add("sendMessageComponent", self._send_message_trigger)
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63 self._attachments_handlers = {"clear": [], "encrypted": []}
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64 self.register(self.default_can_handle, self.default_attach, False, -1000)
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65
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66 def register(self, can_handle, attach, encrypted=False, priority=0):
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67 """Register an attachments handler
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68
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69 @param can_handle(callable, coroutine, Deferred): a method which must return True
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70 if this plugin can handle the upload, otherwise next ones will be tried.
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71 This method will get client and mess_data as arguments, before the XML is
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72 generated
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73 @param attach(callable, coroutine, Deferred): attach the file
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74 this method will get client and mess_data as arguments, after XML is
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75 generated. Upload operation must be handled
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76 hint: "UPLOAD" plugin can be used
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77 @param encrypted(bool): True if the handler manages encrypted files
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78 A handler can be registered twice if it handle both encrypted and clear
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79 attachments
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80 @param priority(int): priority of this handler, handler with higher priority will
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81 be tried first
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82 """
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83 handler = AttachmentHandler(can_handle, attach, priority)
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84 handlers = (
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85 self._attachments_handlers["encrypted"]
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86 if encrypted
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87 else self._attachments_handlers["clear"]
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88 )
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89 if handler in handlers:
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90 raise exceptions.InternalError(
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91 "Attachment handler has been registered twice, this should never happen"
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92 )
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93
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94 handlers.append(handler)
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95 handlers.sort(key=lambda h: h.priority, reverse=True)
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96 log.debug(f"new attachments handler: {handler}")
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97
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98 async def attach_files(self, client, data):
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99 """Main method to attach file
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100
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101 It will do generic pre-treatment, and call the suitable attachments handler
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102 """
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103 # we check attachment for pre-treatment like large image resizing
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104 # media_type will be added if missing (and if it can be guessed from path)
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105 attachments = data["extra"][C.KEY_ATTACHMENTS]
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106 tmp_dirs_to_clean = []
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107 for attachment in attachments:
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108 if attachment.get(C.KEY_ATTACHMENTS_RESIZE, False):
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109 path = Path(attachment["path"])
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110 try:
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111 media_type = attachment[C.KEY_ATTACHMENTS_MEDIA_TYPE]
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112 except KeyError:
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113 media_type = mimetypes.guess_type(path, strict=False)[0]
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114 if media_type is None:
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115 log.warning(
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116 _(
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117 "Can't resize attachment of unknown type: {attachment}"
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118 ).format(attachment=attachment)
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119 )
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120 continue
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121 attachment[C.KEY_ATTACHMENTS_MEDIA_TYPE] = media_type
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122
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123 main_type = media_type.split("/")[0]
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124 if main_type == "image":
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125 report = image.check(self.host, path)
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126 if report["too_large"]:
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127 tmp_dir = Path(tempfile.mkdtemp())
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128 tmp_dirs_to_clean.append(tmp_dir)
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129 new_path = tmp_dir / path.name
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130 await image.resize(
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131 path, report["recommended_size"], dest=new_path
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132 )
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133 attachment["path"] = new_path
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134 log.info(
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135 _(
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136 "Attachment {path!r} has been resized at {new_path!r}"
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137 ).format(path=str(path), new_path=str(new_path))
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138 )
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139 else:
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140 log.warning(
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141 _(
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142 "Can't resize attachment of type {main_type!r}: {attachment}"
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143 ).format(main_type=main_type, attachment=attachment)
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144 )
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145
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146 if client.encryption.is_encryption_requested(data):
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147 handlers = self._attachments_handlers["encrypted"]
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148 else:
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149 handlers = self._attachments_handlers["clear"]
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150
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151 for handler in handlers:
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152 can_handle = await utils.as_deferred(handler.can_handle, client, data)
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153 if can_handle:
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154 break
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155 else:
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156 raise exceptions.NotFound(
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157 _("No plugin can handle attachment with {destinee}").format(
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158 destinee=data["to"]
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159 )
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160 )
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161
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162 await utils.as_deferred(handler.attach, client, data)
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163
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164 for dir_path in tmp_dirs_to_clean:
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165 log.debug(f"Cleaning temporary directory at {dir_path}")
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166 shutil.rmtree(dir_path)
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167
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168 return data
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169
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170 async def upload_files(
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171 self, client: SatXMPPEntity, data: dict, upload_cb: Optional[Callable] = None
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172 ):
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173 """Upload file, and update attachments
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174
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175 invalid attachments will be removed
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176 @param client:
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177 @param data(dict): message data
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178 @param upload_cb(coroutine, Deferred, None): method to use for upload
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179 if None, upload method from UPLOAD plugin will be used.
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180 Otherwise, following kwargs will be used with the cb:
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181 - client
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182 - filepath
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183 - filename
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184 - options
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185 the method must return a tuple similar to UPLOAD plugin's upload method,
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186 it must contain:
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187 - progress_id
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188 - a deferred which fire download URL
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189 """
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190 if upload_cb is None:
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191 upload_cb = self._u.upload
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192
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193 uploads_d = []
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194 to_delete = []
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195 attachments = data["extra"]["attachments"]
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196
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197 for attachment in attachments:
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198 if "url" in attachment and not "path" in attachment:
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199 log.debug(f"attachment is external, we don't upload it: {attachment}")
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200 continue
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201 try:
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202 # we pop path because we don't want it to be stored, as the file can be
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203 # only in a temporary location
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204 path = Path(attachment.pop("path"))
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205 except KeyError:
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206 log.warning("no path in attachment: {attachment}")
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207 to_delete.append(attachment)
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208 continue
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209
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210 if "url" in attachment:
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211 url = attachment.pop("url")
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212 log.warning(
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213 f"unexpected URL in attachment: {url!r}\nattachment: {attachment}"
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214 )
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215
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216 try:
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217 name = attachment["name"]
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218 except KeyError:
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219 name = attachment["name"] = path.name
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220
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221 attachment["size"] = path.stat().st_size
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222
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223 extra = {"attachment": attachment}
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224 progress_id = attachment.pop("progress_id", None)
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225 if progress_id:
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226 extra["progress_id"] = progress_id
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227 check_certificate = self.host.memory.param_get_a(
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228 "check_certificate", "Connection", profile_key=client.profile
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229 )
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230 if not check_certificate:
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231 extra["ignore_tls_errors"] = True
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232 log.warning(
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233 _("certificate check disabled for upload, this is dangerous!")
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234 )
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235
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236 __, upload_d = await upload_cb(
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237 client=client,
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238 filepath=path,
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239 filename=name,
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240 extra=extra,
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241 )
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242 uploads_d.append(upload_d)
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243
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244 for attachment in to_delete:
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245 attachments.remove(attachment)
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246
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247 upload_results = await defer.DeferredList(uploads_d)
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248 for idx, (success, ret) in enumerate(upload_results):
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249 attachment = attachments[idx]
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250
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251 if not success:
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252 # ret is a failure here
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253 log.warning(f"error while uploading {attachment}: {ret}")
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254 continue
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255
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256 attachment["url"] = ret
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257
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258 return data
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259
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260 def _attach_files(self, data, client):
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261 return defer.ensureDeferred(self.attach_files(client, data))
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262
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263 def _send_message_trigger(
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264 self, client, mess_data, pre_xml_treatments, post_xml_treatments
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265 ):
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266 if mess_data["extra"].get(C.KEY_ATTACHMENTS):
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267 post_xml_treatments.addCallback(self._attach_files, client=client)
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268 return True
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269
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270 async def default_can_handle(self, client, data):
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271 return True
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272
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273 async def default_attach(self, client, data):
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274 await self.upload_files(client, data)
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275 # TODO: handle xhtml-im
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276 body_elt = data["xml"].body
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277 if body_elt is None:
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278 body_elt = data["xml"].addElement("body")
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279 attachments = data["extra"][C.KEY_ATTACHMENTS]
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280 if attachments:
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281 body_links = "\n".join(a["url"] for a in attachments)
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diff changeset
282 if str(body_elt).strip():
2ba602aef90e plugin attach, aesgcm: attachments refactoring:
Goffi <goffi@goffi.org>
parents: 3202
diff changeset
283 # if there is already a body, we add a line feed before the first link
4270
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
284 body_elt.addContent("\n")
3219
2ba602aef90e plugin attach, aesgcm: attachments refactoring:
Goffi <goffi@goffi.org>
parents: 3202
diff changeset
285 body_elt.addContent(body_links)