annotate src/memory/disco.py @ 1197:69ffe61240eb

wix: Avoid setting a bad icon From 6fb18309a1d971235c0c3d568704fd91809d2d6e Mon Sep 17 00:00:00 2001 The code tries to load an icon from 'icons/crystal/32/tray_icon.xpm' (relative to self.media_dir), which is part of sat_media, released independently by upstream and not yet part of Debian. It then tries to set this invalid icon. With wxPython 2.8 these issues get quietly ignored, but wxPython 3.0 reports them. As a simple workaround I've just added a check that the icon is valid before setting it, so now you get a messagebox about the icon file not being found and then the app starts. Obviously it would be better to package sat_media so that the icon is available on the system.
author Olly Betts <olly@survex.com>
date Tue, 09 Sep 2014 18:51:35 -0400
parents 7d640c303140
children 8ad37c3d58a9
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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 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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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 sat.core.constants import Const as C
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29 from wokkel import disco
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30 from base64 import b64encode
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31 from hashlib import sha1
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34 PRESENCE = '/presence'
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35 NS_ENTITY_CAPABILITY = 'http://jabber.org/protocol/caps'
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36 CAPABILITY_UPDATE = PRESENCE + '/c[@xmlns="' + NS_ENTITY_CAPABILITY + '"]'
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37 TIMEOUT = 15
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39 class HashGenerationError(Exception):
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40 pass
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42
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43 class ByteIdentity(object):
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44 """This class manage identity as bytes (needed for i;octet sort), it is used for the hash generation"""
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46 def __init__(self, identity, lang=None):
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47 assert isinstance(identity, disco.DiscoIdentity)
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48 self.category = identity.category.encode('utf-8')
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49 self.idType = identity.type.encode('utf-8')
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50 self.name = identity.name.encode('utf-8') if identity.name else ''
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51 self.lang = lang.encode('utf-8') if lang is not None else ''
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53 def __str__(self):
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54 return "%s/%s/%s/%s" % (self.category, self.idType, self.lang, self.name)
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57 class Discovery(object):
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58 """ Manage capabilities of entities """
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60 def __init__(self, host):
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61 self.host = host
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62 self.hashes = {} # key: capability hash, value: disco features/identities
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63 # TODO: save hashes in databse, remove legacy hashes
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64
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65 @defer.inlineCallbacks
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66 def hasFeature(self, feature, jid_=None, profile_key=C.PROF_KEY_NONE):
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67 """Tell if an entity has the required feature
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68
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69 @param feature: feature namespace
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70 @param jid_: jid of the target, or None for profile's server
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71 @param profile_key: %(doc_profile_key)s
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72 @return: a Deferred which fire a boolean (True if feature is available)
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73 """
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74 disco_infos = yield self.getInfos(jid_, profile_key)
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75 defer.returnValue(feature in disco_infos.features)
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77 @defer.inlineCallbacks
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78 def checkFeature(self, feature, jid_=None, profile_key=C.PROF_KEY_NONE):
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79 """Like hasFeature, but raise an exception is feature is not Found
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80
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81 @param feature: feature namespace
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82 @param jid_: jid of the target, or None for profile's server
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83 @param profile_key: %(doc_profile_key)s
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84 @return: None if feature is found
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86 @raise: exceptions.FeatureNotFound
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87 """
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88 disco_infos = yield self.getInfos(jid_, profile_key)
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89 if not feature in disco_infos.features:
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90 raise exceptions.FeatureNotFound
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91 defer.returnValue(feature in disco_infos)
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93 def getInfos(self, jid_=None, profile_key=C.PROF_KEY_NONE):
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94 """get disco infos from jid_, filling capability hash if needed
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96 @param jid_: jid of the target, or None for profile's server
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97 @param profile_key: %(doc_profile_key)s
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98 @return: a Deferred which fire disco.DiscoInfo
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99 """
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100 client = self.host.getClient(profile_key)
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101 if jid_ is None:
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102 jid_ = jid.JID(client.jid.host)
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103 try:
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104 cap_hash = self.host.memory.getEntityData(jid_, [C.ENTITY_CAP_HASH], client.profile)[C.ENTITY_CAP_HASH]
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105 disco_infos = self.hashes[cap_hash]
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106 return defer.succeed(disco_infos)
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107 except KeyError:
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108 # capability hash is not available, we'll compute one
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109 def infosCb(disco_infos):
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110 cap_hash = self.generateHash(disco_infos)
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111 self.hashes[cap_hash] = disco_infos
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112 self.host.memory.updateEntityData(jid_, C.ENTITY_CAP_HASH, cap_hash, client.profile)
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113 return disco_infos
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114 d = client.disco.requestInfo(jid_)
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115 d.addCallback(infosCb)
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116 return d
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117
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118 @defer.inlineCallbacks
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119 def getItems(self, jid_=None, profile_key=C.PROF_KEY_NONE):
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120 """get disco items from jid_, cache them for our own server
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121
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122 @param jid_: jid of the target, or None for profile's server
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123 @param profile_key: %(doc_profile_key)s
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124 @return: a Deferred which fire disco.DiscoItems
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125 """
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126 client = self.host.getClient(profile_key)
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127 if jid_ is None:
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128 jid_ = jid.JID(client.jid.host)
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129 # we cache items only for our own server
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130 try:
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131 items = self.host.memory.getEntityData(jid_, ["DISCO_ITEMS"], client.profile)["DISCO_ITEMS"]
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132 log.debug("[%s] disco items are in cache" % jid_.full())
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133 except KeyError:
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134 log.debug("Caching [%s] disco items" % jid_.full())
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135 items = yield client.disco.requestItems(jid_)
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136 self.host.memory.updateEntityData(jid_, "DISCO_ITEMS", items, client.profile)
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137 else:
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138 items = yield client.disco.requestItems(jid_)
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139
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140 defer.returnValue(items)
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141
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142
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143 def _infosEb(self, failure, entity_jid):
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144 failure.trap(StanzaError)
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145 log.warning(_("Error while requesting [%(jid)s]: %(error)s") % {'jid': entity_jid.full(),
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146 'error': failure.getErrorMessage()})
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147
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148 def findServiceEntities(self, category, type_, jid_=None, profile_key=C.PROF_KEY_NONE):
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149 """Return all available items of an entity which correspond to (category, type_)
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150
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151 @param category: identity's category
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152 @param type_: identitiy's type
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153 @param jid_: the jid of the target server (None for profile's server)
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154 @param profile_key: %(doc_profile_key)s
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155 @return: a set of entities or None if no cached data were found
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156 """
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157 found_entities = set()
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158
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159 def infosCb(infos, entity_jid):
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160 if (category, type_) in infos.identities:
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161 found_entities.add(entity_jid)
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162
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163 def gotItems(items):
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164 defers_list = []
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165 for item in items:
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166 info_d = self.getInfos(item.entity, profile_key)
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167 info_d.addCallbacks(infosCb, self._infosEb, [item.entity], None, [item.entity])
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168 defers_list.append(info_d)
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169 return defer.DeferredList(defers_list)
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170
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171 d = self.getItems(jid_, profile_key)
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172 d.addCallback(gotItems)
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173 d.addCallback(lambda dummy: found_entities)
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174 reactor.callLater(TIMEOUT, d.cancel) # FIXME: one bad service make a general timeout
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175 return d
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176
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177 def findFeaturesSet(self, features, category=None, type_=None, jid_=None, profile_key=C.PROF_KEY_NONE):
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178 """Return entities (including jid_ and its items) offering features
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179
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180 @param features: iterable of features which must be present
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181 @param category: if not None, accept only this category
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182 @param type_: if not None, accept only this type
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183 @param jid_: the jid of the target server (None for profile's server)
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184 @param profile_key: %(doc_profile_key)s
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185 @return: a set of found entities
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186 """
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187 client = self.host.getClient(profile_key)
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188 if jid_ is None:
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189 jid_ = jid.JID(client.jid.host)
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190 features = set(features)
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191 found_entities = set()
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192
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193 def infosCb(infos, entity):
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194 if category is not None or type_ is not None:
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195 categories = set()
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196 types = set()
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197 for identity in infos.identities:
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198 id_cat, id_type = identity
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199 categories.add(id_cat)
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200 types.add(id_type)
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201 if category is not None and category not in categories:
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202 return
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203 if type_ is not None and type_ not in types:
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204 return
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205 if features.issubset(infos.features):
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206 found_entities.add(entity)
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207
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208 def gotItems(items):
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209 defer_list = []
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210 for entity in [jid_] + [item.entity for item in items]:
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211 infos_d = self.getInfos(entity, profile_key)
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212 infos_d.addCallbacks(infosCb, self._infosEb, [entity], None, [entity])
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213 defer_list.append(infos_d)
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214 return defer.DeferredList(defer_list)
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215
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216 d = self.getItems(jid_, profile_key)
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217 d.addCallback(gotItems)
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218 d.addCallback(lambda dummy: found_entities)
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219 reactor.callLater(TIMEOUT, d.cancel) # FIXME: one bad service make a general timeout
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220 return d
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221
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222 def generateHash(self, services):
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223 """ Generate a unique hash for given service
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224
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225 hash algorithm is the one described in XEP-0115
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226 @param services: iterable of disco.DiscoIdentity/disco.DiscoFeature, as returned by discoHandler.info
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227
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228 """
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229 s = []
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230 byte_identities = [ByteIdentity(service) for service in services if isinstance(service, disco.DiscoIdentity)] # FIXME: lang must be managed here
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231 byte_identities.sort(key=lambda i: i.lang)
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232 byte_identities.sort(key=lambda i: i.idType)
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233 byte_identities.sort(key=lambda i: i.category)
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234 for identity in byte_identities:
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235 s.append(str(identity))
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236 s.append('<')
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237 byte_features = [service.encode('utf-8') for service in services if isinstance(service, disco.DiscoFeature)]
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238 byte_features.sort() # XXX: the default sort has the same behaviour as the requested RFC 4790 i;octet sort
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239 for feature in byte_features:
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240 s.append(feature)
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241 s.append('<')
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242 #TODO: manage XEP-0128 data form here
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243 cap_hash = b64encode(sha1(''.join(s)).digest())
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244 log.debug(_('Capability hash generated: [%s]') % cap_hash)
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245 return cap_hash
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246
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247 @defer.inlineCallbacks
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248 def _discoInfos(self, entity_jid_s, profile_key=C.PROF_KEY_NONE):
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249 """ Discovery method for the bridge
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250 @param entity_jid_s: entity we want to discover
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251
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252 @return: list of tu"""
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253 entity = jid.JID(entity_jid_s)
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254 disco_infos = yield self.getInfos(entity, profile_key)
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255 defer.returnValue((disco_infos.features, [(cat, type_, name or '') for (cat, type_), name in disco_infos.identities.items()]))
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256
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257 @defer.inlineCallbacks
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258 def _discoItems(self, entity_jid_s, profile_key=C.PROF_KEY_NONE):
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259 """ Discovery method for the bridge
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260 @param entity_jid_s: entity we want to discover
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261
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262 @return: list of tu"""
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263 entity = jid.JID(entity_jid_s)
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264 disco_items = yield self.getItems(entity, profile_key)
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265 defer.returnValue([(item.entity.full(), item.nodeIdentifier or '', item.name or '') for item in disco_items])