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annotate src/memory/disco.py @ 1684:373ce871b0f3

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core (disco): disco hashes are now stored in database to avoid doing the same disco request on next load
author Goffi <goffi@goffi.org>
date Wed, 25 Nov 2015 21:41:15 +0100
parents fd143578fe89
children cbcc223c323a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT: a jabber client
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 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 import exceptions
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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 twisted.words.protocols.jabber import jid
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25 from twisted.words.protocols.jabber.error import StanzaError
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26 from twisted.internet import defer
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27 from twisted.internet import reactor
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28 from twisted.python import failure
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29 from sat.core.constants import Const as C
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30 from sat.tools import xml_tools
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31 from sat.memory import persistent
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32 from wokkel import disco
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33 from base64 import b64encode
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34 from hashlib import sha1
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36
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37 PRESENCE = '/presence'
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38 NS_ENTITY_CAPABILITY = 'http://jabber.org/protocol/caps'
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39 CAPABILITY_UPDATE = PRESENCE + '/c[@xmlns="' + NS_ENTITY_CAPABILITY + '"]'
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40 TIMEOUT = 15
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41
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42 class HashGenerationError(Exception):
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43 pass
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45
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46 class ByteIdentity(object):
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47 """This class manage identity as bytes (needed for i;octet sort), it is used for the hash generation"""
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49 def __init__(self, identity, lang=None):
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50 assert isinstance(identity, disco.DiscoIdentity)
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51 self.category = identity.category.encode('utf-8')
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52 self.idType = identity.type.encode('utf-8')
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53 self.name = identity.name.encode('utf-8') if identity.name else ''
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54 self.lang = lang.encode('utf-8') if lang is not None else ''
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55
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56 def __str__(self):
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57 return "%s/%s/%s/%s" % (self.category, self.idType, self.lang, self.name)
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58
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60 class HashManager(object):
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61 """map object which manage hashes
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62
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63 persistent storage is update when a new hash is added
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64 """
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65
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66 def __init__(self, persistent):
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67 self.hashes = {}
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68 self.persistent = persistent
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69
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70 def __getitem__(self, key):
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71 return self.hashes[key]
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72
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73 def __setitem__(self, hash_, disco_info):
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74 if hash_ in self.hashes:
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75 log.debug(u"ignoring hash set: it is already known")
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76 return
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77 self.hashes[hash_] = disco_info
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78 self.persistent[hash_] = disco_info.toElement().toXml()
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79
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80 def __contains__(self, hash_):
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81 return self.hashes.__contains__(hash_)
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82
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83 def load(self):
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84 def fillHashes(hashes):
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85 for hash_, xml in hashes.iteritems():
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86 element = xml_tools.ElementParser()(xml)
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87 self.hashes[hash_] = disco.DiscoInfo.fromElement(element)
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88 log.info(u"Disco hashes loaded")
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89 d = self.persistent.load()
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90 d.addCallback(fillHashes)
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91 return d
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92
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93 class Discovery(object):
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94 """ Manage capabilities of entities """
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95
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96 def __init__(self, host):
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97 self.host = host
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98 # TODO: remove legacy hashes
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99
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100 def load(self):
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101 """Load persistent hashes"""
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102 self.hashes = HashManager(persistent.PersistentDict("disco"))
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103 return self.hashes.load()
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104
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105 @defer.inlineCallbacks
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106 def hasFeature(self, feature, jid_=None, profile=C.PROF_KEY_NONE):
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107 """Tell if an entity has the required feature
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108
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109 @param feature: feature namespace
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110 @param jid_: jid of the target, or None for profile's server
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111 @param profile: %(doc_profile)s
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112 @return: a Deferred which fire a boolean (True if feature is available)
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113 """
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114 disco_infos = yield self.getInfos(jid_, profile)
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115 defer.returnValue(feature in disco_infos.features)
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117 @defer.inlineCallbacks
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118 def checkFeature(self, feature, jid_=None, profile=C.PROF_KEY_NONE):
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119 """Like hasFeature, but raise an exception is feature is not Found
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120
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121 @param feature: feature namespace
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122 @param jid_: jid of the target, or None for profile's server
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123 @param profile: %(doc_profile)s
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124
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125 @raise: exceptions.FeatureNotFound
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126 """
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127 disco_infos = yield self.getInfos(jid_, profile)
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128 if not feature in disco_infos.features:
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129 raise failure.Failure(exceptions.FeatureNotFound)
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130
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131 @defer.inlineCallbacks
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132 def checkFeatures(self, features, jid_=None, identity=None, profile=C.PROF_KEY_NONE):
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133 """Like checkFeature, but check several features at once, and check also identity
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134
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135 @param features(iterable[unicode]): features to check
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136 @param jid_(jid.JID): jid of the target, or None for profile's server
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137 @param identity(None, tuple(unicode, unicode): if not None, the entity must have an identity with this (category, type) tuple
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138 @param profile: %(doc_profile)s
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139
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140 @raise: exceptions.FeatureNotFound
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141 """
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142 disco_infos = yield self.getInfos(jid_, profile)
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143 if not set(features).issubset(disco_infos.features):
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diff changeset
144 raise failure.Failure(exceptions.FeatureNotFound())
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diff changeset
145
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diff changeset
146 if identity is not None and identity not in disco_infos.identities:
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diff changeset
147 raise failure.Failure(exceptions.FeatureNotFound())
282
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parents:
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148
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149 def getInfos(self, jid_=None, profile=C.PROF_KEY_NONE):
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150 """get disco infos from jid_, filling capability hash if needed
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diff changeset
151
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152 @param jid_: jid of the target, or None for profile's server
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153 @param profile: %(doc_profile)s
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154 @return: a Deferred which fire disco.DiscoInfo
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diff changeset
155 """
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156 client = self.host.getClient(profile)
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157 if jid_ is None:
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diff changeset
158 jid_ = jid.JID(client.jid.host)
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diff changeset
159 try:
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diff changeset
160 cap_hash = self.host.memory.getEntityData(jid_, [C.ENTITY_CAP_HASH], client.profile)[C.ENTITY_CAP_HASH]
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diff changeset
161 except (KeyError, exceptions.UnknownEntityError):
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diff changeset
162 # capability hash is not available, we'll compute one
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diff changeset
163 def infosCb(disco_infos):
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diff changeset
164 cap_hash = self.generateHash(disco_infos)
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parents: 963
diff changeset
165 self.hashes[cap_hash] = disco_infos
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parents: 1290
diff changeset
166 self.host.memory.updateEntityData(jid_, C.ENTITY_CAP_HASH, cap_hash, profile_key=client.profile)
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diff changeset
167 return disco_infos
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diff changeset
168 d = client.disco.requestInfo(jid_)
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diff changeset
169 d.addCallback(infosCb)
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diff changeset
170 return d
1290
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171 else:
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172 disco_infos = self.hashes[cap_hash]
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diff changeset
173 return defer.succeed(disco_infos)
587
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parents: 572
diff changeset
174
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diff changeset
175 @defer.inlineCallbacks
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diff changeset
176 def getItems(self, jid_=None, nodeIdentifier='', profile=C.PROF_KEY_NONE):
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diff changeset
177 """get disco items from jid_, cache them for our own server
587
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diff changeset
178
1216
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parents: 1189
diff changeset
179 @param jid_ (jid.JID): jid of the target, or None for profile's server
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parents: 1189
diff changeset
180 @param nodeIdentifier (str): optional node identifier
1552
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diff changeset
181 @param profile: %(doc_profile)s
963
723f28cd15c7 core (disco): added discoInfos and discoItems bridge methods
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parents: 961
diff changeset
182 @return: a Deferred which fire disco.DiscoItems
944
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diff changeset
183 """
1552
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parents: 1493
diff changeset
184 client = self.host.getClient(profile)
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diff changeset
185 if jid_ is None:
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diff changeset
186 jid_ = jid.JID(client.jid.host)
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diff changeset
187 # we cache items only for our own server
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diff changeset
188 try:
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
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parents: 941
diff changeset
189 items = self.host.memory.getEntityData(jid_, ["DISCO_ITEMS"], client.profile)["DISCO_ITEMS"]
1409
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souliane <souliane@mailoo.org>
parents: 1396
diff changeset
190 log.debug(u"[%s] disco items are in cache" % jid_.full())
1290
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diff changeset
191 except (KeyError, exceptions.UnknownEntityError):
1409
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parents: 1396
diff changeset
192 log.debug(u"Caching [%s] disco items" % jid_.full())
1216
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parents: 1189
diff changeset
193 items = yield client.disco.requestItems(jid_, nodeIdentifier)
1315
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
194 self.host.memory.updateEntityData(jid_, "DISCO_ITEMS", items, profile_key=client.profile)
944
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diff changeset
195 else:
1216
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diff changeset
196 items = yield client.disco.requestItems(jid_, nodeIdentifier)
944
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diff changeset
197
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
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diff changeset
198 defer.returnValue(items)
587
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parents: 572
diff changeset
199
594
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 588
diff changeset
200
1493
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Goffi <goffi@goffi.org>
parents: 1491
diff changeset
201 def _infosEb(self, failure_, entity_jid):
1285c714a6cc core (disco): use of failure.Failure when raising FeatureNotFound to avoid a jump in debugger in debug mode
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parents: 1491
diff changeset
202 failure_.trap(StanzaError)
1409
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souliane <souliane@mailoo.org>
parents: 1396
diff changeset
203 log.warning(_(u"Error while requesting [%(jid)s]: %(error)s") % {'jid': entity_jid.full(),
1493
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parents: 1491
diff changeset
204 'error': failure_.getErrorMessage()})
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parents: 963
diff changeset
205
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diff changeset
206 def findServiceEntities(self, category, type_, jid_=None, profile=C.PROF_KEY_NONE):
944
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diff changeset
207 """Return all available items of an entity which correspond to (category, type_)
587
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diff changeset
208
944
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diff changeset
209 @param category: identity's category
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diff changeset
210 @param type_: identitiy's type
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diff changeset
211 @param jid_: the jid of the target server (None for profile's server)
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diff changeset
212 @param profile: %(doc_profile)s
1460
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Goffi <goffi@goffi.org>
parents: 1416
diff changeset
213 @return: a set of found entities
1675
fd143578fe89 plugin XEP-0065: fixed bad error handling
Goffi <goffi@goffi.org>
parents: 1552
diff changeset
214 @raise defer.CancelledError: the request timed out
944
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diff changeset
215 """
973
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parents: 963
diff changeset
216 found_entities = set()
4a8903021fda core (disco): findFeaturesSet and findServiceEntities don't use inlineCallbacks anymore, that allow a better error management (no more anonying debugger raise when discoInfo fails in debug mode)
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parents: 963
diff changeset
217
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Goffi <goffi@goffi.org>
parents: 963
diff changeset
218 def infosCb(infos, entity_jid):
944
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diff changeset
219 if (category, type_) in infos.identities:
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parents: 963
diff changeset
220 found_entities.add(entity_jid)
282
6a0c6d8e119d added plugin xep-0115: entity capabilities
Goffi <goffi@goffi.org>
parents:
diff changeset
221
973
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parents: 963
diff changeset
222 def gotItems(items):
4a8903021fda core (disco): findFeaturesSet and findServiceEntities don't use inlineCallbacks anymore, that allow a better error management (no more anonying debugger raise when discoInfo fails in debug mode)
Goffi <goffi@goffi.org>
parents: 963
diff changeset
223 defers_list = []
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parents: 963
diff changeset
224 for item in items:
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diff changeset
225 info_d = self.getInfos(item.entity, profile)
973
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parents: 963
diff changeset
226 info_d.addCallbacks(infosCb, self._infosEb, [item.entity], None, [item.entity])
4a8903021fda core (disco): findFeaturesSet and findServiceEntities don't use inlineCallbacks anymore, that allow a better error management (no more anonying debugger raise when discoInfo fails in debug mode)
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parents: 963
diff changeset
227 defers_list.append(info_d)
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parents: 963
diff changeset
228 return defer.DeferredList(defers_list)
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229
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diff changeset
230 d = self.getItems(jid_, profile=profile)
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Goffi <goffi@goffi.org>
parents: 963
diff changeset
231 d.addCallback(gotItems)
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Goffi <goffi@goffi.org>
parents: 963
diff changeset
232 d.addCallback(lambda dummy: found_entities)
1189
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parents: 993
diff changeset
233 reactor.callLater(TIMEOUT, d.cancel) # FIXME: one bad service make a general timeout
973
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parents: 963
diff changeset
234 return d
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parents: 963
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235
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parents: 1493
diff changeset
236 def findFeaturesSet(self, features, identity=None, jid_=None, profile=C.PROF_KEY_NONE):
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parents: 941
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237 """Return entities (including jid_ and its items) offering features
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
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238
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parents: 941
diff changeset
239 @param features: iterable of features which must be present
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parents: 1484
diff changeset
240 @param identity(None, tuple(unicode, unicode)): if not None, accept only this (category/type) identity
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parents: 941
diff changeset
241 @param jid_: the jid of the target server (None for profile's server)
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parents: 1493
diff changeset
242 @param profile: %(doc_profile)s
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parents: 941
diff changeset
243 @return: a set of found entities
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parents: 941
diff changeset
244 """
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parents: 1493
diff changeset
245 client = self.host.getClient(profile)
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parents: 941
diff changeset
246 if jid_ is None:
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parents: 941
diff changeset
247 jid_ = jid.JID(client.jid.host)
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parents: 941
diff changeset
248 features = set(features)
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
249 found_entities = set()
282
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parents:
diff changeset
250
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Goffi <goffi@goffi.org>
parents: 963
diff changeset
251 def infosCb(infos, entity):
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Goffi <goffi@goffi.org>
parents: 1484
diff changeset
252 if identity is not None and identity not in infos.identities:
704ca56f5ca9 core (disco): added checkFeatures to check several features at once + identities are now managed with a tuple in findFeaturesSet and checkFeatures
Goffi <goffi@goffi.org>
parents: 1484
diff changeset
253 return
944
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parents: 941
diff changeset
254 if features.issubset(infos.features):
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parents: 941
diff changeset
255 found_entities.add(entity)
282
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parents:
diff changeset
256
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Goffi <goffi@goffi.org>
parents: 963
diff changeset
257 def gotItems(items):
4a8903021fda core (disco): findFeaturesSet and findServiceEntities don't use inlineCallbacks anymore, that allow a better error management (no more anonying debugger raise when discoInfo fails in debug mode)
Goffi <goffi@goffi.org>
parents: 963
diff changeset
258 defer_list = []
4a8903021fda core (disco): findFeaturesSet and findServiceEntities don't use inlineCallbacks anymore, that allow a better error management (no more anonying debugger raise when discoInfo fails in debug mode)
Goffi <goffi@goffi.org>
parents: 963
diff changeset
259 for entity in [jid_] + [item.entity for item in items]:
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parents: 1493
diff changeset
260 infos_d = self.getInfos(entity, profile)
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parents: 963
diff changeset
261 infos_d.addCallbacks(infosCb, self._infosEb, [entity], None, [entity])
1484
05b821a0ff5a core (disco): fixed bad indentation resulting in bad result in findFeaturesSet
Goffi <goffi@goffi.org>
parents: 1460
diff changeset
262 defer_list.append(infos_d)
973
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Goffi <goffi@goffi.org>
parents: 963
diff changeset
263 return defer.DeferredList(defer_list)
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parents: 963
diff changeset
264
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parents: 1493
diff changeset
265 d = self.getItems(jid_, profile=profile)
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parents: 963
diff changeset
266 d.addCallback(gotItems)
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Goffi <goffi@goffi.org>
parents: 963
diff changeset
267 d.addCallback(lambda dummy: found_entities)
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parents: 993
diff changeset
268 reactor.callLater(TIMEOUT, d.cancel) # FIXME: one bad service make a general timeout
973
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parents: 963
diff changeset
269 return d
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diff changeset
270
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
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parents: 941
diff changeset
271 def generateHash(self, services):
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
272 """ Generate a unique hash for given service
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
273
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
274 hash algorithm is the one described in XEP-0115
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
275 @param services: iterable of disco.DiscoIdentity/disco.DiscoFeature, as returned by discoHandler.info
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parents: 941
diff changeset
276
282
6a0c6d8e119d added plugin xep-0115: entity capabilities
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parents:
diff changeset
277 """
944
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diff changeset
278 s = []
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
Goffi <goffi@goffi.org>
parents: 941
diff changeset
279 byte_identities = [ByteIdentity(service) for service in services if isinstance(service, disco.DiscoIdentity)] # FIXME: lang must be managed here
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
Goffi <goffi@goffi.org>
parents: 941
diff changeset
280 byte_identities.sort(key=lambda i: i.lang)
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
Goffi <goffi@goffi.org>
parents: 941
diff changeset
281 byte_identities.sort(key=lambda i: i.idType)
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
282 byte_identities.sort(key=lambda i: i.category)
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
283 for identity in byte_identities:
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
284 s.append(str(identity))
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
Goffi <goffi@goffi.org>
parents: 941
diff changeset
285 s.append('<')
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
Goffi <goffi@goffi.org>
parents: 941
diff changeset
286 byte_features = [service.encode('utf-8') for service in services if isinstance(service, disco.DiscoFeature)]
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
Goffi <goffi@goffi.org>
parents: 941
diff changeset
287 byte_features.sort() # XXX: the default sort has the same behaviour as the requested RFC 4790 i;octet sort
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
288 for feature in byte_features:
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Goffi <goffi@goffi.org>
parents: 941
diff changeset
289 s.append(feature)
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
Goffi <goffi@goffi.org>
parents: 941
diff changeset
290 s.append('<')
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
Goffi <goffi@goffi.org>
parents: 941
diff changeset
291 #TODO: manage XEP-0128 data form here
e1842ebcb2f3 core, plugin XEP-0115: discovery refactoring:
Goffi <goffi@goffi.org>
parents: 941
diff changeset
292 cap_hash = b64encode(sha1(''.join(s)).digest())
1409
3265a2639182 massive (preventive) addition of 'u' (unicode) before the strings passed to logging functions
souliane <souliane@mailoo.org>
parents: 1396
diff changeset
293 log.debug(_(u'Capability hash generated: [%s]') % cap_hash)
944
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diff changeset
294 return cap_hash
963
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parents: 961
diff changeset
295
723f28cd15c7 core (disco): added discoInfos and discoItems bridge methods
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parents: 961
diff changeset
296 @defer.inlineCallbacks
723f28cd15c7 core (disco): added discoInfos and discoItems bridge methods
Goffi <goffi@goffi.org>
parents: 961
diff changeset
297 def _discoInfos(self, entity_jid_s, profile_key=C.PROF_KEY_NONE):
723f28cd15c7 core (disco): added discoInfos and discoItems bridge methods
Goffi <goffi@goffi.org>
parents: 961
diff changeset
298 """ Discovery method for the bridge
723f28cd15c7 core (disco): added discoInfos and discoItems bridge methods
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diff changeset
299 @param entity_jid_s: entity we want to discover
723f28cd15c7 core (disco): added discoInfos and discoItems bridge methods
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diff changeset
300
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parents: 1493
diff changeset
301 @return: list of tuples
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Goffi <goffi@goffi.org>
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diff changeset
302 """
e0bde0d0b321 core (disco): use of “profile” instead of “profile_key” in several disco methods
Goffi <goffi@goffi.org>
parents: 1493
diff changeset
303 profile = self.host.memory.getProfileName(profile_key)
963
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Goffi <goffi@goffi.org>
parents: 961
diff changeset
304 entity = jid.JID(entity_jid_s)
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parents: 1493
diff changeset
305 disco_infos = yield self.getInfos(entity, profile)
1414
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parents: 1409
diff changeset
306 extensions = {}
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parents: 1409
diff changeset
307 for form_type, form in disco_infos.extensions.items():
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parents: 1409
diff changeset
308 fields = []
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
309 for field in form.fieldList:
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parents: 1409
diff changeset
310 data = {'type': field.fieldType}
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parents: 1409
diff changeset
311 for attr in ('var', 'label', 'desc'):
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parents: 1409
diff changeset
312 value = getattr(field, attr)
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diff changeset
313 if value is not None:
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parents: 1409
diff changeset
314 data[attr] = value
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diff changeset
315
1416
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Goffi <goffi@goffi.org>
parents: 1414
diff changeset
316 values = [field.value] if field.value is not None else field.values
a419da93afef core (disco): fixed bad indentation in _discoInfos (used by bridge)
Goffi <goffi@goffi.org>
parents: 1414
diff changeset
317 fields.append((data, values))
1414
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diff changeset
318
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diff changeset
319 extensions[form_type or ""] = fields
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parents: 1409
diff changeset
320
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Goffi <goffi@goffi.org>
parents: 1409
diff changeset
321 defer.returnValue((disco_infos.features,
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diff changeset
322 [(cat, type_, name or '') for (cat, type_), name in disco_infos.identities.items()],
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diff changeset
323 extensions))
963
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diff changeset
324
723f28cd15c7 core (disco): added discoInfos and discoItems bridge methods
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diff changeset
325 @defer.inlineCallbacks
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parents: 961
diff changeset
326 def _discoItems(self, entity_jid_s, profile_key=C.PROF_KEY_NONE):
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parents: 961
diff changeset
327 """ Discovery method for the bridge
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Goffi <goffi@goffi.org>
parents: 961
diff changeset
328 @param entity_jid_s: entity we want to discover
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diff changeset
329
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diff changeset
330 @return: list of tuples"""
e0bde0d0b321 core (disco): use of “profile” instead of “profile_key” in several disco methods
Goffi <goffi@goffi.org>
parents: 1493
diff changeset
331 profile = self.host.memory.getProfileName(profile_key)
963
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parents: 961
diff changeset
332 entity = jid.JID(entity_jid_s)
1552
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diff changeset
333 disco_items = yield self.getItems(entity, profile=profile)
963
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parents: 961
diff changeset
334 defer.returnValue([(item.entity.full(), item.nodeIdentifier or '', item.name or '') for item in disco_items])