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annotate src/plugins/plugin_xep_0231.py @ 2176:61128d260eef

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plugin account: removed dependency to Prosody/prosodyctl and properly use in-band registration instead
author Goffi <goffi@goffi.org>
date Thu, 09 Mar 2017 00:06:13 +0100
parents 33c8c4973743
children 8b37a62336c3
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rev   line source
2110
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for Jingle File Transfer (XEP-0231)
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5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from sat.core.i18n import _
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21 from sat.core.constants import Const as C
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22 from sat.core.log import getLogger
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23 log = getLogger(__name__)
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24 from sat.tools import xml_tools
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25 from wokkel import disco, iwokkel
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26 from zope.interface import implements
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27 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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28 import base64
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29
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30
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31 PLUGIN_INFO = {
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32 C.PI_NAME: "Bits of Binary",
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33 C.PI_IMPORT_NAME: "XEP-0231",
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34 C.PI_TYPE: "XEP",
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35 C.PI_PROTOCOLS: ["XEP-0231"],
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36 C.PI_DEPENDENCIES: ["XEP-0071"],
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37 C.PI_MAIN: "XEP_0231",
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38 C.PI_HANDLER: "yes",
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39 C.PI_DESCRIPTION: _("""Implementation of bits of binary (used for small images/files)""")
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40 }
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41
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42 NS_BOB = u'urn:xmpp:bob'
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43
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44
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45 class XEP_0231(object):
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46
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47 def __init__(self, host):
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48 log.info(_(u"plugin Bits of Binary initialization"))
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49 self.host = host
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50 host.trigger.add("xhtml_post_treat", self.XHTMLTrigger)
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51
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52 def dumpData(self, client, data_elt, cid):
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53 """save file encoded in data_elt to cache
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54
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55 @param data_elt(domish.Element): <data> as in XEP-0231
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56 @param cid(unicode): content-id
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57 @return(unicode): full path to dumped file
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58 """
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59 # FIXME: is it needed to use a separate thread?
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60 # probably not with the little data expected with BoB
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61 mime_type = data_elt.getAttribute('type','')
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62
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63 try:
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64 max_age = int(data_elt['max-age'])
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65 except (KeyError, ValueError):
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66 log.warning(u'invalid max-age found')
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67 max_age = None
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68
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69 with client.cache.cacheData(
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70 PLUGIN_INFO['import_name'],
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71 cid,
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72 mime_type,
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73 max_age) as f:
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74
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75 file_path = f.name
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76 f.write(base64.b64decode(str(data_elt)))
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77
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78 return file_path
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79
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80 def getHandler(self, client):
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81 return XEP_0231_handler()
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82
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83 def _dataCb(self, iq_elt, client, img_elt, cid):
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84 for data_elt in iq_elt.elements(NS_BOB, u'data'):
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85 if data_elt.getAttribute('cid') == cid:
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86 file_path = self.dumpData(client, data_elt, cid)
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87 img_elt[u'src'] = u'file://{}'.format(file_path)
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88 break
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89 else:
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90 log.warning(u"invalid data stanza received, requested cid was not found:\n{iq_elt}\nrequested cid: {cid}".format(
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91 iq_elt = iq_elt,
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92 cid = cid
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93 ))
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94
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95 def _dataEb(self, iq_elt):
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96 log.warning(u"Can't get requested data:\n{iq_elt}".format(iq_elt=iq_elt))
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97
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98 def XHTMLTrigger(self, client, message_elt, body_elt, lang, treat_d):
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99 for img_elt in xml_tools.findAll(body_elt, C.NS_XHTML, u'img'):
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100 source = img_elt.getAttribute(u'src','')
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101 if source.startswith(u'cid:'):
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102 cid = source[4:]
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103 file_path = client.cache.getFilePath(cid)
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104 if file_path is not None:
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105 # image is in cache, we change change the url
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106 img_elt[u'src'] = u'file://{}'.format(file_path)
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107 continue
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108 else:
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109 # image is not in cache, is it given locally?
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110 for data_elt in message_elt.elements(NS_BOB, u'data'):
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111 if data_elt.getAttribute('cid') == cid:
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112 file_path = self.dumpData(data_elt, cid)
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113 img_elt[u'src'] = u'file://{}'.format(file_path)
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114 break
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115 else:
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116 # cid not found locally, we need to request it
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117 # so we use the deferred
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118 iq_elt = client.IQ('get')
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119 iq_elt['to'] = message_elt['from']
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120 data_elt = iq_elt.addElement((NS_BOB, 'data'))
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121 data_elt['cid'] = cid
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122 d = iq_elt.send()
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123 d.addCallback(self._dataCb, client, img_elt, cid)
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124 d.addErrback(self._dataEb)
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125 treat_d.addCallback(lambda dummy: d)
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126
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127
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128 class XEP_0231_handler(XMPPHandler):
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129 implements(iwokkel.IDisco)
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130
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131 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
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132 return [disco.DiscoFeature(NS_BOB)]
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133
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134 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
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135 return []