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annotate src/plugins/plugin_xep_0095.py @ 2138:6e509ee853a8

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plugin OTR, core; use of new sendMessage + OTR mini refactoring: - new client.sendMessage method is used instead of sendMessageToStream - client.feedback is used in OTR - OTR now add message processing hints and carbon private element as recommanded by XEP-0364. Explicit Message Encryption is still TODO - OTR use the new sendMessageFinish trigger, this has a number of advantages: * there is little risk that OTR is skipped by other plugins (they have to use client.sendMessage as recommanded) * being at the end of the chain, OTR can check and remove any HTML or other leaking elements * OTR doesn't have to skip other plugins anymore, this means that things like delivery receipts are now working with OTR (but because there is not full stanza encryption, they can leak metadata) * OTR can decide to follow storage hint by letting or deleting "history" key
author Goffi <goffi@goffi.org>
date Sun, 05 Feb 2017 15:00:01 +0100
parents 6a66c8c5a567
children 1d3f73e065e1
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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 "name": "XEP 0095 Plugin",
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35 "import_name": "XEP-0095",
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36 "type": "XEP",
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37 "protocols": ["XEP-0095"],
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38 "main": "XEP_0095",
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39 "handler": "yes",
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40 "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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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, profile):
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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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diff changeset
111
2129
6a66c8c5a567 core: replaced calls to client.xmlstream.send by client.send which is the right method to use. client.xmlstream should not be used directly
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
112 client.send(iq_error_elt)
587
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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
diff changeset
115 """Send the accept stream initiation answer
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
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
diff changeset
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
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
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120 @param profile: %(doc_profile)s
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
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"))
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
Goffi <goffi@goffi.org>
parents: 1409
diff changeset
123 if misc_elts is None:
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
Goffi <goffi@goffi.org>
parents: 1409
diff changeset
124 misc_elts = []
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
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:
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
Goffi <goffi@goffi.org>
parents: 1409
diff changeset
130 si_elt.addChild(elt)
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Goffi <goffi@goffi.org>
parents: 1934
diff changeset
131 client.send(result_elt)
385
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Goffi <goffi@goffi.org>
parents:
diff changeset
132
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
133 def _parseOfferResult(self, iq_elt):
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
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()
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
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")
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
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)
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
Goffi <goffi@goffi.org>
parents: 1409
diff changeset
140
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
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):
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
Goffi <goffi@goffi.org>
parents: 1409
diff changeset
143 """Propose a stream initiation
385
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
144
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
145 @param to_jid(jid.JID): recipient
d04d7402b8e9 plugins XEP-0020, XEP-0065, XEP-0095, XEP-0096: fixed file copy with Stream Initiation:
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
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
150 @param profile: %(doc_profile)s
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Goffi <goffi@goffi.org>
parents: 1409
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
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
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
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
164 si['id'] = sid
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
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
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
diff changeset
174
587
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
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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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
diff changeset
178
385
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
Goffi <goffi@goffi.org>
parents:
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
41fdaeb005bc plugins: Stream initiation (xep-0095) implementation
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
Goffi <goffi@goffi.org>
parents:
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
Goffi <goffi@goffi.org>
parents:
diff changeset
190 return []