Mercurial > libervia-backend
annotate sat/plugins/plugin_xep_0054.py @ 3713:f97be63871e4 v0.8.0
v0.8.0 release
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Tue, 30 Nov 2021 23:31:07 +0100 |
| parents | 36849fb5c854 |
| children | 213e83a4ed10 |
| rev | line source |
|---|---|
| 3028 | 1 #!/usr/bin/env python3 |
| 3137 | 2 |
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3 # SAT plugin for managing xep-0054 |
| 3479 | 4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org) |
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5 # Copyright (C) 2014 Emmanuel Gil Peyrot (linkmauve@linkmauve.fr) |
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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 import io |
| 3185 | 21 from base64 import b64decode, b64encode |
| 22 from hashlib import sha1 | |
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23 from pathlib import Path |
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24 from typing import Optional |
| 3185 | 25 from zope.interface import implementer |
| 939 | 26 from twisted.internet import threads, defer |
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27 from twisted.words.protocols.jabber import jid, error |
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28 from twisted.words.xish import domish |
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29 from twisted.python.failure import Failure |
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30 from wokkel import disco, iwokkel |
| 3185 | 31 from sat.core import exceptions |
| 32 from sat.core.i18n import _ | |
| 33 from sat.core.constants import Const as C | |
| 34 from sat.core.log import getLogger | |
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35 from sat.core.xmpp import SatXMPPEntity |
| 3185 | 36 from sat.memory import persistent |
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37 from sat.tools import image |
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38 |
| 3185 | 39 log = getLogger(__name__) |
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40 |
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41 try: |
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42 from PIL import Image |
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43 except: |
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44 raise exceptions.MissingModule( |
| 3028 | 45 "Missing module pillow, please download/install it from https://python-pillow.github.io" |
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46 ) |
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47 |
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48 from twisted.words.protocols.jabber.xmlstream import XMPPHandler |
| 48 | 49 |
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50 IMPORT_NAME = "XEP-0054" |
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51 |
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52 PLUGIN_INFO = { |
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53 C.PI_NAME: "XEP 0054 Plugin", |
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54 C.PI_IMPORT_NAME: IMPORT_NAME, |
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55 C.PI_TYPE: "XEP", |
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56 C.PI_PROTOCOLS: ["XEP-0054", "XEP-0153"], |
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57 C.PI_DEPENDENCIES: ["IDENTITY"], |
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58 C.PI_RECOMMENDATIONS: [], |
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59 C.PI_MAIN: "XEP_0054", |
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60 C.PI_HANDLER: "yes", |
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61 C.PI_DESCRIPTION: _("""Implementation of vcard-temp"""), |
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62 } |
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63 |
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64 AVATAR_PATH = "avatars" |
| 3040 | 65 AVATAR_DIM = (128, 128) |
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66 |
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67 IQ_GET = '/iq[@type="get"]' |
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68 NS_VCARD = "vcard-temp" |
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69 VCARD_REQUEST = IQ_GET + '/vCard[@xmlns="' + NS_VCARD + '"]' # TODO: manage requests |
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70 |
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71 PRESENCE = "/presence" |
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72 NS_VCARD_UPDATE = "vcard-temp:x:update" |
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73 VCARD_UPDATE = PRESENCE + '/x[@xmlns="' + NS_VCARD_UPDATE + '"]' |
| 48 | 74 |
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75 HASH_SHA1_EMPTY = "da39a3ee5e6b4b0d3255bfef95601890afd80709" |
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76 |
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77 |
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78 class XEP_0054(object): |
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79 |
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80 def __init__(self, host): |
| 3028 | 81 log.info(_("Plugin XEP_0054 initialization")) |
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82 self.host = host |
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83 self._i = host.plugins['IDENTITY'] |
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84 self._i.register(IMPORT_NAME, 'avatar', self.getAvatar, self.setAvatar) |
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85 self._i.register(IMPORT_NAME, 'nicknames', self.getNicknames, self.setNicknames) |
| 3028 | 86 host.trigger.add("presence_available", self.presenceAvailableTrigger) |
| 64 | 87 |
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88 def getHandler(self, client): |
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89 return XEP_0054_handler(self) |
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90 |
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91 def presenceAvailableTrigger(self, presence_elt, client): |
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92 try: |
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93 avatar_hash = client._xep_0054_avatar_hashes[client.jid.userhost()] |
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94 except KeyError: |
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95 log.info( |
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96 _("No avatar in cache for {profile}") |
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97 .format(profile=client.profile)) |
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98 return True |
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99 x_elt = domish.Element((NS_VCARD_UPDATE, "x")) |
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100 x_elt.addElement("photo", content=avatar_hash) |
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101 presence_elt.addChild(x_elt) |
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102 return True |
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103 |
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104 async def profileConnecting(self, client): |
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105 client._xep_0054_avatar_hashes = persistent.PersistentDict( |
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106 NS_VCARD, client.profile) |
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107 await client._xep_0054_avatar_hashes.load() |
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108 |
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109 def savePhoto(self, client, photo_elt, entity): |
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110 """Parse a <PHOTO> photo_elt and save the picture""" |
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111 # XXX: this method is launched in a separate thread |
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112 try: |
| 3028 | 113 mime_type = str(next(photo_elt.elements(NS_VCARD, "TYPE"))) |
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114 except StopIteration: |
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115 mime_type = None |
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116 else: |
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117 if not mime_type: |
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118 # MIME type not known, we'll try autodetection below |
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119 mime_type = None |
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120 elif mime_type == "image/x-png": |
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121 # XXX: this old MIME type is still used by some clients |
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122 mime_type = "image/png" |
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123 |
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124 try: |
| 3028 | 125 buf = str(next(photo_elt.elements(NS_VCARD, "BINVAL"))) |
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126 except StopIteration: |
| 3028 | 127 log.warning("BINVAL element not found") |
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128 raise Failure(exceptions.NotFound()) |
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129 |
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130 if not buf: |
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131 log.warning("empty avatar for {jid}".format(jid=entity.full())) |
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132 raise Failure(exceptions.NotFound()) |
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133 |
| 3028 | 134 log.debug(_("Decoding binary")) |
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135 decoded = b64decode(buf) |
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136 del buf |
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137 |
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138 if mime_type is None: |
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139 log.debug( |
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140 f"no media type found specified for {entity}'s avatar, trying to " |
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141 f"guess") |
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142 |
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143 try: |
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144 mime_type = image.guess_type(io.BytesIO(decoded)) |
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145 except IOError as e: |
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146 log.warning(f"Can't open avatar buffer: {e}") |
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147 |
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148 if mime_type is None: |
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149 msg = f"Can't find media type for {entity}'s avatar" |
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150 log.warning(msg) |
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151 raise Failure(exceptions.DataError(msg)) |
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152 |
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153 image_hash = sha1(decoded).hexdigest() |
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154 with self.host.common_cache.cacheData( |
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155 PLUGIN_INFO["import_name"], |
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156 image_hash, |
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157 mime_type, |
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158 ) as f: |
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159 f.write(decoded) |
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160 return image_hash |
|
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161 |
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162 async def vCard2Dict(self, client, vcard_elt, entity_jid): |
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163 """Convert a VCard_elt to a dict, and save binaries""" |
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164 log.debug(("parsing vcard_elt")) |
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165 vcard_dict = {} |
|
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166 |
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167 for elem in vcard_elt.elements(): |
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168 if elem.name == "FN": |
| 3028 | 169 vcard_dict["fullname"] = str(elem) |
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170 elif elem.name == "NICKNAME": |
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171 nickname = vcard_dict["nickname"] = str(elem) |
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172 await self._i.update( |
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173 client, |
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174 IMPORT_NAME, |
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175 "nicknames", |
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176 [nickname], |
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177 entity_jid |
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178 ) |
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179 elif elem.name == "URL": |
| 3028 | 180 vcard_dict["website"] = str(elem) |
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181 elif elem.name == "EMAIL": |
| 3028 | 182 vcard_dict["email"] = str(elem) |
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183 elif elem.name == "BDAY": |
| 3028 | 184 vcard_dict["birthday"] = str(elem) |
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185 elif elem.name == "PHOTO": |
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186 # TODO: handle EXTVAL |
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187 try: |
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188 avatar_hash = await threads.deferToThread( |
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189 self.savePhoto, client, elem, entity_jid |
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190 ) |
| 3040 | 191 except (exceptions.DataError, exceptions.NotFound): |
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192 avatar_hash = "" |
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193 vcard_dict["avatar"] = avatar_hash |
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194 except Exception as e: |
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195 log.error(f"avatar saving error: {e}") |
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196 avatar_hash = None |
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197 else: |
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198 vcard_dict["avatar"] = avatar_hash |
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199 if avatar_hash is not None: |
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200 await client._xep_0054_avatar_hashes.aset( |
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201 entity_jid.full(), avatar_hash) |
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202 |
|
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203 if avatar_hash: |
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204 avatar_cache = self.host.common_cache.getMetadata(avatar_hash) |
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205 await self._i.update( |
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206 client, |
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207 IMPORT_NAME, |
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208 "avatar", |
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209 { |
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210 'path': avatar_cache['path'], |
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211 'filename': avatar_cache['filename'], |
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212 'media_type': avatar_cache['mime_type'], |
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213 'cache_uid': avatar_hash |
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214 }, |
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215 entity_jid |
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216 ) |
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217 else: |
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218 await self._i.update( |
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219 client, IMPORT_NAME, "avatar", None, entity_jid) |
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220 else: |
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221 log.debug("FIXME: [{}] VCard_elt tag is not managed yet".format(elem.name)) |
|
2252
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222 |
|
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223 return vcard_dict |
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224 |
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225 async def getVCardElement(self, client, entity_jid): |
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226 """Retrieve domish.Element of a VCard |
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227 |
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228 @param entity_jid(jid.JID): entity from who we need the vCard |
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229 @raise DataError: we got an invalid answer |
| 43 | 230 """ |
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231 iq_elt = client.IQ("get") |
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232 iq_elt["from"] = client.jid.full() |
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233 iq_elt["to"] = entity_jid.full() |
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|
234 iq_elt.addElement("vCard", NS_VCARD) |
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235 iq_ret_elt = await iq_elt.send(entity_jid.full()) |
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236 try: |
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237 return next(iq_ret_elt.elements(NS_VCARD, "vCard")) |
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238 except StopIteration: |
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239 log.warning(_( |
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240 "vCard element not found for {entity_jid}: {xml}" |
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241 ).format(entity_jid=entity_jid, xml=iq_ret_elt.toXml())) |
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242 raise exceptions.DataError(f"no vCard element found for {entity_jid}") |
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243 |
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244 async def updateVCardElt(self, client, entity_jid, to_replace): |
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245 """Create a vcard element to replace some metadata |
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246 |
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247 @param to_replace(list[str]): list of vcard element names to remove |
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248 """ |
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249 try: |
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250 # we first check if a vcard already exists, to keep data |
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251 vcard_elt = await self.getVCardElement(client, entity_jid) |
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252 except error.StanzaError as e: |
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253 if e.condition == "item-not-found": |
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254 vcard_elt = domish.Element((NS_VCARD, "vCard")) |
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255 else: |
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256 raise e |
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257 except exceptions.DataError: |
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258 vcard_elt = domish.Element((NS_VCARD, "vCard")) |
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259 else: |
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260 # the vcard exists, we need to remove elements that we'll replace |
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261 for elt_name in to_replace: |
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262 try: |
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263 elt = next(vcard_elt.elements(NS_VCARD, elt_name)) |
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264 except StopIteration: |
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265 pass |
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266 else: |
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267 vcard_elt.children.remove(elt) |
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268 |
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269 return vcard_elt |
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270 |
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271 async def getCard(self, client, entity_jid): |
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272 """Ask server for VCard |
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273 |
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274 @param entity_jid(jid.JID): jid from which we want the VCard |
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275 @result(dict): vCard data |
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276 """ |
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277 entity_jid = self._i.getIdentityJid(client, entity_jid) |
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278 log.debug(f"Asking for {entity_jid}'s VCard") |
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279 try: |
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280 vcard_elt = await self.getVCardElement(client, entity_jid) |
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281 except exceptions.DataError: |
| 3554 | 282 self._i.update(client, IMPORT_NAME, "avatar", None, entity_jid) |
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283 except Exception as e: |
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284 log.warning(_( |
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285 "Can't get vCard for {entity_jid}: {e}" |
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286 ).format(entity_jid=entity_jid, e=e)) |
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287 else: |
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288 log.debug(_("VCard found")) |
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289 return await self.vCard2Dict(client, vcard_elt, entity_jid) |
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290 |
|
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291 async def getAvatar( |
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292 self, |
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293 client: SatXMPPEntity, |
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294 entity_jid: jid.JID |
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295 ) -> Optional[dict]: |
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296 """Get avatar data |
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297 |
|
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298 @param entity: entity to get avatar from |
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299 @return: avatar metadata, or None if no avatar has been found |
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300 """ |
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301 entity_jid = self._i.getIdentityJid(client, entity_jid) |
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302 hashes_cache = client._xep_0054_avatar_hashes |
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303 vcard = await self.getCard(client, entity_jid) |
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304 if vcard is None: |
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305 return None |
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306 try: |
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307 avatar_hash = hashes_cache[entity_jid.full()] |
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308 except KeyError: |
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309 if 'avatar' in vcard: |
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310 raise exceptions.InternalError( |
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311 "No avatar hash while avatar is found in vcard") |
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312 return None |
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313 |
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314 if not avatar_hash: |
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315 return None |
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316 |
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317 avatar_cache = self.host.common_cache.getMetadata(avatar_hash) |
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318 return self._i.avatarBuildMetadata( |
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319 avatar_cache['path'], avatar_cache['mime_type'], avatar_hash) |
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320 |
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321 def _buildSetAvatar(self, client, vcard_elt, avatar_data): |
|
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322 # XXX: this method is executed in a separate thread |
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323 if avatar_data["media_type"] == "image/svg+xml": |
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324 # for vector image, we save directly |
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325 img_buf = open(avatar_data["path"], "rb") |
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326 else: |
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327 # for bitmap image, we check size and resize if necessary |
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328 try: |
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329 img = Image.open(avatar_data["path"]) |
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330 except IOError as e: |
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331 raise exceptions.DataError(f"Can't open image: {e}") |
|
562
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332 |
|
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333 if img.size != AVATAR_DIM: |
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334 img.thumbnail(AVATAR_DIM) |
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335 if img.size[0] != img.size[1]: # we need to crop first |
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336 left, upper = (0, 0) |
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337 right, lower = img.size |
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338 offset = abs(right - lower) / 2 |
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339 if right == min(img.size): |
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340 upper += offset |
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341 lower -= offset |
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342 else: |
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|
343 left += offset |
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344 right -= offset |
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345 img = img.crop((left, upper, right, lower)) |
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346 img_buf = io.BytesIO() |
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347 # PNG is well supported among clients, so we convert to this format |
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348 img.save(img_buf, "PNG") |
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349 img_buf.seek(0) |
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350 avatar_data["media_type"] = "image/png" |
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351 |
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352 media_type = avatar_data["media_type"] |
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353 photo_elt = vcard_elt.addElement("PHOTO") |
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354 photo_elt.addElement("TYPE", content=media_type) |
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355 image_b64 = b64encode(img_buf.read()).decode() |
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356 img_buf.seek(0) |
| 3040 | 357 photo_elt.addElement("BINVAL", content=image_b64) |
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358 image_hash = sha1(img_buf.read()).hexdigest() |
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359 img_buf.seek(0) |
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360 with self.host.common_cache.cacheData( |
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361 PLUGIN_INFO["import_name"], image_hash, media_type |
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362 ) as f: |
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363 f.write(img_buf.read()) |
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364 avatar_data['path'] = Path(f.name) |
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365 avatar_data['filename'] = avatar_data['path'].name |
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366 avatar_data['cache_uid'] = image_hash |
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367 return image_hash |
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368 |
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369 async def setAvatar(self, client, avatar_data, entity): |
|
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370 """Set avatar of the profile |
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371 |
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372 @param avatar_data(dict): data of the image to use as avatar, as built by |
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373 IDENTITY plugin. |
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374 @param entity(jid.JID): entity whose avatar must be changed |
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375 """ |
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376 vcard_elt = await self.updateVCardElt(client, entity, ['PHOTO']) |
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377 |
|
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378 iq_elt = client.IQ() |
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379 iq_elt.addChild(vcard_elt) |
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380 await threads.deferToThread( |
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381 self._buildSetAvatar, client, vcard_elt, avatar_data |
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382 ) |
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383 # image is now at the right size/format |
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384 |
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385 await iq_elt.send() |
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386 |
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387 # FIXME: should send the current presence, not always "available" ! |
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388 await client.presence.available() |
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389 |
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390 async def getNicknames(self, client, entity): |
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391 """get nick from cache, or check vCard |
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392 |
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393 @param entity(jid.JID): entity to get nick from |
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394 @return(list[str]): nicknames found |
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395 """ |
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396 vcard_data = await self.getCard(client, entity) |
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397 try: |
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398 return [vcard_data['nickname']] |
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399 except (KeyError, TypeError): |
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400 return [] |
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401 |
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402 async def setNicknames(self, client, nicknames, entity): |
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403 """Update our vCard and set a nickname |
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404 |
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405 @param nicknames(list[str]): new nicknames to use |
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406 only first item of this list will be used here |
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407 """ |
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408 nick = nicknames[0].strip() |
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409 |
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410 vcard_elt = await self.updateVCardElt(client, entity, ['NICKNAME']) |
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411 |
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412 if nick: |
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413 vcard_elt.addElement((NS_VCARD, "NICKNAME"), content=nick) |
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414 iq_elt = client.IQ() |
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415 iq_elt.addChild(vcard_elt) |
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416 await iq_elt.send() |
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417 |
| 64 | 418 |
| 3028 | 419 @implementer(iwokkel.IDisco) |
| 64 | 420 class XEP_0054_handler(XMPPHandler): |
|
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421 |
| 64 | 422 def __init__(self, plugin_parent): |
| 423 self.plugin_parent = plugin_parent | |
| 424 self.host = plugin_parent.host | |
| 425 | |
| 426 def connectionInitialized(self): | |
|
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427 self.xmlstream.addObserver(VCARD_UPDATE, self._update) |
|
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428 |
|
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429 def getDiscoInfo(self, requestor, target, nodeIdentifier=""): |
| 64 | 430 return [disco.DiscoFeature(NS_VCARD)] |
| 431 | |
|
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432 def getDiscoItems(self, requestor, target, nodeIdentifier=""): |
| 64 | 433 return [] |
|
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434 |
|
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435 async def update(self, presence): |
|
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436 """Called on <presence/> stanza with vcard data |
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437 |
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438 Check for avatar information, and get VCard if needed |
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439 @param presence(domish.Element): <presence/> stanza |
| 48 | 440 """ |
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441 client = self.parent |
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442 entity_jid = self.plugin_parent._i.getIdentityJid( |
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443 client, jid.JID(presence["from"])) |
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444 |
|
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|
445 try: |
| 3028 | 446 x_elt = next(presence.elements(NS_VCARD_UPDATE, "x")) |
|
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|
447 except StopIteration: |
|
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|
448 return |
|
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|
449 |
|
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|
450 try: |
| 3028 | 451 photo_elt = next(x_elt.elements(NS_VCARD_UPDATE, "photo")) |
|
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|
452 except StopIteration: |
|
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Goffi <goffi@goffi.org>
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|
453 return |
|
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454 |
|
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|
455 given_hash = str(photo_elt).strip() |
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|
456 if given_hash == HASH_SHA1_EMPTY: |
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|
457 given_hash = "" |
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|
458 |
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459 hashes_cache = client._xep_0054_avatar_hashes |
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|
460 |
|
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|
461 old_hash = hashes_cache.get(entity_jid.full()) |
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462 |
|
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463 if old_hash == given_hash: |
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464 # no change, we can return… |
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465 if given_hash: |
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466 # …but we double check that avatar is in cache |
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467 avatar_cache = self.host.common_cache.getMetadata(given_hash) |
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468 if avatar_cache is None: |
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469 log.debug( |
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470 f"Avatar for [{entity_jid}] is known but not in cache, we get " |
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471 f"it" |
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472 ) |
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473 # getCard will put the avatar in cache |
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474 await self.plugin_parent.getCard(client, entity_jid) |
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475 else: |
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476 log.debug(f"avatar for {entity_jid} is already in cache") |
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477 return |
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478 |
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479 if given_hash is None: |
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480 # XXX: we use empty string to indicate that there is no avatar |
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481 given_hash = "" |
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482 |
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483 await hashes_cache.aset(entity_jid.full(), given_hash) |
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484 |
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485 if not given_hash: |
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486 await self.plugin_parent._i.update( |
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487 client, IMPORT_NAME, "avatar", None, entity_jid) |
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488 # the avatar has been removed, no need to go further |
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489 return |
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490 |
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491 avatar_cache = self.host.common_cache.getMetadata(given_hash) |
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492 if avatar_cache is not None: |
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493 log.debug( |
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494 f"New avatar found for [{entity_jid}], it's already in cache, we use it" |
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495 ) |
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496 await self.plugin_parent._i.update( |
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497 client, |
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498 IMPORT_NAME, "avatar", |
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499 { |
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500 'path': avatar_cache['path'], |
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501 'filename': avatar_cache['filename'], |
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502 'media_type': avatar_cache['mime_type'], |
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503 'cache_uid': given_hash, |
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504 }, |
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505 entity_jid |
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506 ) |
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507 else: |
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508 log.debug( |
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509 "New avatar found for [{entity_jid}], requesting vcard" |
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510 ) |
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511 vcard = await self.plugin_parent.getCard(client, entity_jid) |
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512 if vcard is None: |
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513 log.warning(f"Unexpected empty vCard for {entity_jid}") |
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514 return |
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515 computed_hash = client._xep_0054_avatar_hashes[entity_jid.full()] |
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516 if computed_hash != given_hash: |
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517 log.warning( |
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518 "computed hash differs from given hash for {entity}:\n" |
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519 "computed: {computed}\ngiven: {given}".format( |
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520 entity=entity_jid, computed=computed_hash, given=given_hash |
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521 ) |
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522 ) |
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523 |
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524 def _update(self, presence): |
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525 defer.ensureDeferred(self.update(presence)) |