Mercurial > libervia-backend

annotate src/plugins/plugin_xep_0095.py @ 2359:47516e90d26a

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jp (pubsub/node/schema): check that a schema exists before parsing it (fix issue on new schema edition)
author Goffi <goffi@goffi.org>
date Sun, 24 Sep 2017 16:29:18 +0200
parents 33c8c4973743
children 8b37a62336c3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2daf7b4c6756 use of /usr/bin/env instead of /usr/bin/python in shebang
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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 managing xep-0095
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5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
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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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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.core import exceptions
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25 from twisted.words.protocols.jabber import xmlstream
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26 from twisted.words.protocols.jabber import error
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27 from zope.interface import implements
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28 from wokkel import disco
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29 from wokkel import iwokkel
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30 import uuid
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32
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33 PLUGIN_INFO = {
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34 C.PI_NAME: "XEP 0095 Plugin",
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35 C.PI_IMPORT_NAME: "XEP-0095",
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36 C.PI_TYPE: "XEP",
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37 C.PI_PROTOCOLS: ["XEP-0095"],
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38 C.PI_MAIN: "XEP_0095",
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39 C.PI_HANDLER: "yes",
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40 C.PI_DESCRIPTION: _("""Implementation of Stream Initiation""")
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41 }
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44 IQ_SET = '/iq[@type="set"]'
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45 NS_SI = 'http://jabber.org/protocol/si'
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46 SI_REQUEST = IQ_SET + '/si[@xmlns="' + NS_SI + '"]'
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47 SI_PROFILE_HEADER = "http://jabber.org/protocol/si/profile/"
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48 SI_ERROR_CONDITIONS = ('bad-profile', 'no-valid-streams')
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49
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50
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51 class XEP_0095(object):
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52
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53 def __init__(self, host):
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54 log.info(_("Plugin XEP_0095 initialization"))
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55 self.host = host
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56 self.si_profiles = {} # key: SI profile, value: callback
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57
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58 def getHandler(self, client):
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59 return XEP_0095_handler(self)
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61 def registerSIProfile(self, si_profile, callback):
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62 """Add a callback for a SI Profile
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63
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64 @param si_profile(unicode): SI profile name (e.g. file-transfer)
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65 @param callback(callable): method to call when the profile name is asked
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66 """
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67 self.si_profiles[si_profile] = callback
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68
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69 def unregisterSIProfile(self, si_profile):
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70 try:
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71 del self.si_profiles[si_profile]
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72 except KeyError:
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73 log.error(u"Trying to unregister SI profile [{}] which was not registered".format(si_profile))
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74
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75 def streamInit(self, iq_elt, profile):
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76 """This method is called on stream initiation (XEP-0095 #3.2)
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78 @param iq_elt: IQ element
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79 @param profile: %(doc_profile)s"""
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80 log.info(_("XEP-0095 Stream initiation"))
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81 iq_elt.handled = True
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82 si_elt = iq_elt.elements(NS_SI, 'si').next()
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83 si_id = si_elt['id']
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84 si_mime_type = iq_elt.getAttribute('mime-type', 'application/octet-stream')
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85 si_profile = si_elt['profile']
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86 si_profile_key = si_profile[len(SI_PROFILE_HEADER):] if si_profile.startswith(SI_PROFILE_HEADER) else si_profile
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87 if si_profile_key in self.si_profiles:
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88 #We know this SI profile, we call the callback
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89 self.si_profiles[si_profile_key](iq_elt, si_id, si_mime_type, si_elt, profile)
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90 else:
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91 #We don't know this profile, we send an error
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92 self.sendError(iq_elt, 'bad-profile', profile)
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94 def sendError(self, request, condition, profile):
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95 """Send IQ error as a result
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96
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97 @param request(domish.Element): original IQ request
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98 @param condition(str): error condition
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99 @param profile: %(doc_profile)s
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100 """
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101 client = self.host.getClient(profile)
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102 if condition in SI_ERROR_CONDITIONS:
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103 si_condition = condition
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104 condition = 'bad-request'
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105 else:
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106 si_condition = None
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107
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108 iq_error_elt = error.StanzaError(condition).toResponse(request)
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109 if si_condition is not None:
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110 iq_error_elt.error.addElement((NS_SI, si_condition))
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111
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112 client.send(iq_error_elt)
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parents: 572
diff changeset
113
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
114 def acceptStream(self, iq_elt, feature_elt, misc_elts=None, profile=C.PROF_KEY_NONE):
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Goffi <goffi@goffi.org>
parents: 1409
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115 """Send the accept stream initiation answer
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parents: 1409
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116
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
117 @param iq_elt(domish.Element): initial SI request
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Goffi <goffi@goffi.org>
parents: 1409
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118 @param feature_elt(domish.Element): 'feature' element containing stream method to use
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
119 @param misc_elts(list[domish.Element]): list of elements to add
385
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Goffi <goffi@goffi.org>
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120 @param profile: %(doc_profile)s
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Goffi <goffi@goffi.org>
parents:
diff changeset
121 """
1577
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
122 log.info(_("sending stream initiation accept answer"))
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
123 if misc_elts is None:
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
124 misc_elts = []
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
125 client = self.host.getClient(profile)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
126 result_elt = xmlstream.toResponse(iq_elt, 'result')
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
127 si_elt = result_elt.addElement((NS_SI, 'si'))
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
128 si_elt.addChild(feature_elt)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
129 for elt in misc_elts:
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
130 si_elt.addChild(elt)
2129
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Goffi <goffi@goffi.org>
parents: 1934
diff changeset
131 client.send(result_elt)
385
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132
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
133 def _parseOfferResult(self, iq_elt):
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
134 try:
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
Goffi <goffi@goffi.org>
parents: 1409
diff changeset
135 si_elt = iq_elt.elements(NS_SI, "si").next()
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
136 except StopIteration:
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
Goffi <goffi@goffi.org>
parents: 1409
diff changeset
137 log.warning(u"No <si/> element found in result while expected")
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
138 raise exceptions.DataError
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
139 return (iq_elt, si_elt)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
140
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
141
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
142 def proposeStream(self, to_jid, si_profile, feature_elt, misc_elts, mime_type='application/octet-stream', profile=C.PROF_KEY_NONE):
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
143 """Propose a stream initiation
385
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parents:
diff changeset
144
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
145 @param to_jid(jid.JID): recipient
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
146 @param si_profile(unicode): Stream initiation profile (XEP-0095)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
147 @param feature_elt(domish.Element): feature element, according to XEP-0020
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
148 @param misc_elts(list[domish.Element]): list of elements to add
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
149 @param mime_type(unicode): stream mime type
385
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Goffi <goffi@goffi.org>
parents:
diff changeset
150 @param profile: %(doc_profile)s
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diff changeset
151 @return (tuple): tuple with:
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
152 - session id (unicode)
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Goffi <goffi@goffi.org>
parents: 1409
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153 - (D(domish_elt, domish_elt): offer deferred which returl a tuple
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
154 with iq_elt and si_elt
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
155 """
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
Goffi <goffi@goffi.org>
parents: 1409
diff changeset
156 client = self.host.getClient(profile)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
157 offer = client.IQ()
587
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
diff changeset
158 sid = str(uuid.uuid4())
1409
3265a2639182 massive (preventive) addition of 'u' (unicode) before the strings passed to logging functions
souliane <souliane@mailoo.org>
parents: 1396
diff changeset
159 log.debug(_(u"Stream Session ID: %s") % offer["id"])
385
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parents:
diff changeset
160
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
161 offer["from"] = client.jid.full()
385
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
162 offer["to"] = to_jid.full()
594
e629371a28d3 Fix pep8 support in src/plugins.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 588
diff changeset
163 si = offer.addElement('si', NS_SI)
385
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Goffi <goffi@goffi.org>
parents:
diff changeset
164 si['id'] = sid
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Goffi <goffi@goffi.org>
parents:
diff changeset
165 si["mime-type"] = mime_type
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
166 si["profile"] = si_profile
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
167 for elt in misc_elts:
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Goffi <goffi@goffi.org>
parents:
diff changeset
168 si.addChild(elt)
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Goffi <goffi@goffi.org>
parents:
diff changeset
169 si.addChild(feature_elt)
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Goffi <goffi@goffi.org>
parents:
diff changeset
170
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
171 offer_d = offer.send()
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
172 offer_d.addCallback(self._parseOfferResult)
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
173 return sid, offer_d
385
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parents:
diff changeset
174
587
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diff changeset
175
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
176 class XEP_0095_handler(xmlstream.XMPPHandler):
385
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
177 implements(iwokkel.IDisco)
587
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parents: 572
diff changeset
178
385
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
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diff changeset
179 def __init__(self, plugin_parent):
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
180 self.plugin_parent = plugin_parent
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
181 self.host = plugin_parent.host
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
182
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
183 def connectionInitialized(self):
594
e629371a28d3 Fix pep8 support in src/plugins.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 588
diff changeset
184 self.xmlstream.addObserver(SI_REQUEST, self.plugin_parent.streamInit, profile=self.parent.profile)
385
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Goffi <goffi@goffi.org>
parents:
diff changeset
185
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
186 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
1577
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
187 return [disco.DiscoFeature(NS_SI)] + [disco.DiscoFeature(u"http://jabber.org/protocol/si/profile/{}".format(profile_name)) for profile_name in self.plugin_parent.si_profiles]
385
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
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diff changeset
188
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
189 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
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parents:
diff changeset
190 return []