annotate sat/plugins/plugin_xep_0231.py @ 3405:ecdb3728749e

plugin XEP-0353: Jingle Message Initiation implementation: This plugin uses the new `XEP-0166_initiate` trigger to initiate a Jingle session with messages if the peer jid has no resource specified. On reception, if the sender is not in our roster, a confirmation is requested to user to avoid leaking presence and IP. If user refuses the session for somebody not in roster, nothing is sent at all (the request is just ignored).
author Goffi <goffi@goffi.org>
date Thu, 12 Nov 2020 14:53:15 +0100
parents ac9342f359e9
children be6d91572633
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1 #!/usr/bin/env python3
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2
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4 # SAT plugin for Bit of Binary handling (XEP-0231)
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5 # Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 import base64
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21 import time
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22 from pathlib import Path
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23 from functools import partial
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24 from zope.interface import implementer
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25 from twisted.python import failure
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26 from twisted.words.protocols.jabber import xmlstream
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27 from twisted.words.protocols.jabber import jid
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28 from twisted.words.protocols.jabber import error as jabber_error
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29 from twisted.internet import defer
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30 from wokkel import disco, iwokkel
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31 from sat.tools import xml_tools
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32 from sat.core.i18n import _
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33 from sat.core.constants import Const as C
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34 from sat.core import exceptions
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35 from sat.core.log import getLogger
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36
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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: "Bits of Binary",
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42 C.PI_IMPORT_NAME: "XEP-0231",
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43 C.PI_TYPE: "XEP",
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44 C.PI_MODES: C.PLUG_MODE_BOTH,
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45 C.PI_PROTOCOLS: ["XEP-0231"],
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46 C.PI_MAIN: "XEP_0231",
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47 C.PI_HANDLER: "yes",
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48 C.PI_DESCRIPTION: _(
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49 """Implementation of bits of binary (used for small images/files)"""
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50 ),
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51 }
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52
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53 NS_BOB = "urn:xmpp:bob"
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54 IQ_BOB_REQUEST = C.IQ_GET + '/data[@xmlns="' + NS_BOB + '"]'
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56
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57 class XEP_0231(object):
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58 def __init__(self, host):
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59 log.info(_("plugin Bits of Binary initialization"))
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60 self.host = host
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61 host.registerNamespace("bob", NS_BOB)
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62 host.trigger.add("xhtml_post_treat", self.XHTMLTrigger)
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63 host.bridge.addMethod(
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64 "bobGetFile",
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65 ".plugin",
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66 in_sign="sss",
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67 out_sign="s",
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68 method=self._getFile,
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69 async_=True,
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70 )
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71
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72 def dumpData(self, cache, data_elt, cid):
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73 """save file encoded in data_elt to cache
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74
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75 @param cache(memory.cache.Cache): cache to use to store the data
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76 @param data_elt(domish.Element): <data> as in XEP-0231
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77 @param cid(unicode): content-id
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78 @return(unicode): full path to dumped file
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79 """
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80 #  FIXME: is it needed to use a separate thread?
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81 # probably not with the little data expected with BoB
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82 try:
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83 max_age = int(data_elt["max-age"])
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84 if max_age < 0:
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85 raise ValueError
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86 except (KeyError, ValueError):
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87 log.warning("invalid max-age found")
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88 max_age = None
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89
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90 with cache.cacheData(
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91 PLUGIN_INFO[C.PI_IMPORT_NAME], cid, data_elt.getAttribute("type"), max_age
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92 ) as f:
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93
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94 file_path = Path(f.name)
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95 f.write(base64.b64decode(str(data_elt)))
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96
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97 return file_path
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98
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99 def getHandler(self, client):
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100 return XEP_0231_handler(self)
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101
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102 def _requestCb(self, iq_elt, cache, cid):
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103 for data_elt in iq_elt.elements(NS_BOB, "data"):
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104 if data_elt.getAttribute("cid") == cid:
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105 file_path = self.dumpData(cache, data_elt, cid)
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106 return file_path
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107
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108 log.warning(
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109 "invalid data stanza received, requested cid was not found:\n{iq_elt}\nrequested cid: {cid}".format(
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110 iq_elt=iq_elt, cid=cid
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111 )
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112 )
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113 raise failure.Failure(exceptions.DataError("missing data"))
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114
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115 def _requestEb(self, failure_):
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116 """Log the error and continue errback chain"""
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117 log.warning("Can't get requested data:\n{reason}".format(reason=failure_))
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118 return failure_
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119
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120 def requestData(self, client, to_jid, cid, cache=None):
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121 """Request data if we don't have it in cache
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122
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123 @param to_jid(jid.JID): jid to request the data to
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124 @param cid(unicode): content id
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125 @param cache(memory.cache.Cache, None): cache to use
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126 client.cache will be used if None
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127 @return D(unicode): path to file with data
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128 """
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129 if cache is None:
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130 cache = client.cache
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131 iq_elt = client.IQ("get")
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132 iq_elt["to"] = to_jid.full()
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133 data_elt = iq_elt.addElement((NS_BOB, "data"))
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134 data_elt["cid"] = cid
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135 d = iq_elt.send()
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Goffi <goffi@goffi.org>
parents: 2483
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136 d.addCallback(self._requestCb, cache, cid)
20a5e7db0609 plugin XEP-0231: separated the requestData code in a method which can called independantly + some minor improvments
Goffi <goffi@goffi.org>
parents: 2483
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137 d.addErrback(self._requestEb)
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138 return d
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139
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140 def _setImgEltSrc(self, path, img_elt):
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141 img_elt["src"] = "file://{}".format(path)
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parents:
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142
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Goffi <goffi@goffi.org>
parents:
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143 def XHTMLTrigger(self, client, message_elt, body_elt, lang, treat_d):
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144 for img_elt in xml_tools.findAll(body_elt, C.NS_XHTML, "img"):
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145 source = img_elt.getAttribute("src", "")
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146 if source.startswith("cid:"):
2110
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147 cid = source[4:]
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parents:
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148 file_path = client.cache.getFilePath(cid)
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parents:
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149 if file_path is not None:
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150 #  image is in cache, we change the url
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151 img_elt["src"] = "file://{}".format(file_path)
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parents:
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152 continue
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parents:
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153 else:
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154 # image is not in cache, is it given locally?
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155 for data_elt in message_elt.elements(NS_BOB, "data"):
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156 if data_elt.getAttribute("cid") == cid:
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Goffi <goffi@goffi.org>
parents: 2483
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157 file_path = self.dumpData(client.cache, data_elt, cid)
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158 img_elt["src"] = "file://{}".format(file_path)
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parents:
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159 break
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Goffi <goffi@goffi.org>
parents:
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160 else:
2d633b3c923d plugin XEP-0231: Bits of Binary first draft:
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parents:
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161 # cid not found locally, we need to request it
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parents:
diff changeset
162 # so we use the deferred
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parents: 2562
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163 d = self.requestData(client, jid.JID(message_elt["from"]), cid)
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Goffi <goffi@goffi.org>
parents: 2483
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164 d.addCallback(partial(self._setImgEltSrc, img_elt=img_elt))
2765
378188abe941 misc: replaced all "dummy" by the more conventional and readable "__" ("_" being used for gettext)
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165 treat_d.addCallback(lambda __: d)
2110
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166
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167 def onComponentRequest(self, iq_elt, client):
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168 """cache data is retrieve from common cache for components"""
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169 # FIXME: this is a security/privacy issue as no access check is done
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parents: 2511
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170 # but this is mitigated by the fact that the cid must be known.
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
171 # An access check should be implemented though.
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172
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Goffi <goffi@goffi.org>
parents: 2511
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173 iq_elt.handled = True
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parents: 2562
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174 data_elt = next(iq_elt.elements(NS_BOB, "data"))
2522
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
175 try:
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
176 cid = data_elt["cid"]
2522
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
177 except KeyError:
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parents: 2562
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178 error_elt = jabber_error.StanzaError("not-acceptable").toResponse(iq_elt)
2522
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
179 client.send(error_elt)
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diff changeset
180 return
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
181
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
182 metadata = self.host.common_cache.getMetadata(cid)
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
183 if metadata is None:
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diff changeset
184 error_elt = jabber_error.StanzaError("item-not-found").toResponse(iq_elt)
2522
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
185 client.send(error_elt)
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
186 return
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
187
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
188 with open(metadata["path"], 'rb') as f:
2522
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
189 data = f.read()
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
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parents: 2511
diff changeset
190
2624
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parents: 2562
diff changeset
191 result_elt = xmlstream.toResponse(iq_elt, "result")
3273
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
192 data_elt = result_elt.addElement(
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
193 (NS_BOB, "data"), content=base64.b64encode(data).decode())
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Goffi <goffi@goffi.org>
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194 data_elt["cid"] = cid
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Goffi <goffi@goffi.org>
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diff changeset
195 data_elt["type"] = metadata["mime_type"]
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
196 data_elt["max-age"] = str(int(max(0, metadata["eol"] - time.time())))
2522
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
197 client.send(result_elt)
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Goffi <goffi@goffi.org>
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diff changeset
198
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
199 def _getFile(self, peer_jid_s, cid, profile):
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
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diff changeset
200 peer_jid = jid.JID(peer_jid_s)
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
201 assert cid
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
202 client = self.host.getClient(profile)
3273
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
203 d = self.getFile(client, peer_jid, cid)
4230aaeab9a7 plugin XEP-0231, XEP-0264: fixed some remaining encoding issue following Python 3 port
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
204 d.addCallback(lambda path: str(path))
4230aaeab9a7 plugin XEP-0231, XEP-0264: fixed some remaining encoding issue following Python 3 port
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
205 return d
2522
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
206
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
207 def getFile(self, client, peer_jid, cid, parent_elt=None):
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
208 """Retrieve a file from it's content-id
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Goffi <goffi@goffi.org>
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diff changeset
209
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
210 @param peer_jid(jid.JID): jid of the entity offering the data
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
211 @param cid(unicode): content-id of file data
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
212 @param parent_elt(domish.Element, None): if file is not in cache,
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
213 data will be looked after in children of this elements.
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
214 None to ignore
3273
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Goffi <goffi@goffi.org>
parents: 3137
diff changeset
215 @return D(Path): path to cached data
2522
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
216 """
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
217 file_path = client.cache.getFilePath(cid)
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
218 if file_path is not None:
2624
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parents: 2562
diff changeset
219 #  file is in cache
2522
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
220 return defer.succeed(file_path)
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
221 else:
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
222 # file not in cache, is it given locally?
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
223 if parent_elt is not None:
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
224 for data_elt in parent_elt.elements(NS_BOB, "data"):
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
225 if data_elt.getAttribute("cid") == cid:
2522
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
226 return defer.succeed(self.dumpData(client.cache, data_elt, cid))
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
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diff changeset
227
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
228 # cid not found locally, we need to request it
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
229 # so we use the deferred
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
230 return self.requestData(client, peer_jid, cid)
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diff changeset
231
2110
2d633b3c923d plugin XEP-0231: Bits of Binary first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
232
3028
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Goffi <goffi@goffi.org>
parents: 2771
diff changeset
233 @implementer(iwokkel.IDisco)
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20a5e7db0609 plugin XEP-0231: separated the requestData code in a method which can called independantly + some minor improvments
Goffi <goffi@goffi.org>
parents: 2483
diff changeset
234 class XEP_0231_handler(xmlstream.XMPPHandler):
2110
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parents:
diff changeset
235
2522
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Goffi <goffi@goffi.org>
parents: 2511
diff changeset
236 def __init__(self, plugin_parent):
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
237 self.plugin_parent = plugin_parent
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
238 self.host = plugin_parent.host
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
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diff changeset
239
95c31756944c component file sharing, plugin XEP-0231: thumbnail are now returned by component using Bits of Binary:
Goffi <goffi@goffi.org>
parents: 2511
diff changeset
240 def connectionInitialized(self):
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241 if self.parent.is_component:
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242 self.xmlstream.addObserver(
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243 IQ_BOB_REQUEST, self.plugin_parent.onComponentRequest, client=self.parent
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244 )
2522
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245
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246 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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247 return [disco.DiscoFeature(NS_BOB)]
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248
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249 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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250 return []