Mercurial > libervia-backend
annotate src/memory/disco.py @ 1692:0fdd8fe34fbf
core (xmlui): new deferredUI method allows to manage XMLUI with a Deferred insteand of manual submit_id handling:
- this differ from deferXMLUI, as it can be used in ui returned to frontend after a bridge call (deferXMLUI use actionNew only)
- the "chained" argument allow to manage series of XMLUIs
- this argument is also present in deferXMLUI
author | Goffi <goffi@goffi.org> |
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date | Fri, 27 Nov 2015 16:45:55 +0100 |
parents | 373ce871b0f3 |
children | cbcc223c323a |
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 |
1396 | 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 |
609
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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 |
771 | 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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35 |
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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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44 |
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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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48 |
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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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59 |
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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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116 |
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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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144 raise failure.Failure(exceptions.FeatureNotFound()) |
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145 |
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146 if identity is not None and identity not in disco_infos.identities: |
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147 raise failure.Failure(exceptions.FeatureNotFound()) |
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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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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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155 """ |
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156 client = self.host.getClient(profile) |
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157 if jid_ is None: |
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158 jid_ = jid.JID(client.jid.host) |
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159 try: |
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160 cap_hash = self.host.memory.getEntityData(jid_, [C.ENTITY_CAP_HASH], client.profile)[C.ENTITY_CAP_HASH] |
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161 except (KeyError, exceptions.UnknownEntityError): |
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162 # capability hash is not available, we'll compute one |
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163 def infosCb(disco_infos): |
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164 cap_hash = self.generateHash(disco_infos) |
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165 self.hashes[cap_hash] = disco_infos |
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166 self.host.memory.updateEntityData(jid_, C.ENTITY_CAP_HASH, cap_hash, profile_key=client.profile) |
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167 return disco_infos |
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168 d = client.disco.requestInfo(jid_) |
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169 d.addCallback(infosCb) |
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170 return d |
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171 else: |
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172 disco_infos = self.hashes[cap_hash] |
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173 return defer.succeed(disco_infos) |
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174 |
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175 @defer.inlineCallbacks |
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176 def getItems(self, jid_=None, nodeIdentifier='', profile=C.PROF_KEY_NONE): |
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177 """get disco items from jid_, cache them for our own server |
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178 |
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179 @param jid_ (jid.JID): jid of the target, or None for profile's server |
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180 @param nodeIdentifier (str): optional node identifier |
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181 @param profile: %(doc_profile)s |
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182 @return: a Deferred which fire disco.DiscoItems |
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183 """ |
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184 client = self.host.getClient(profile) |
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185 if jid_ is None: |
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186 jid_ = jid.JID(client.jid.host) |
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187 # we cache items only for our own server |
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188 try: |
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189 items = self.host.memory.getEntityData(jid_, ["DISCO_ITEMS"], client.profile)["DISCO_ITEMS"] |
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190 log.debug(u"[%s] disco items are in cache" % jid_.full()) |
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191 except (KeyError, exceptions.UnknownEntityError): |
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192 log.debug(u"Caching [%s] disco items" % jid_.full()) |
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193 items = yield client.disco.requestItems(jid_, nodeIdentifier) |
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194 self.host.memory.updateEntityData(jid_, "DISCO_ITEMS", items, profile_key=client.profile) |
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195 else: |
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196 items = yield client.disco.requestItems(jid_, nodeIdentifier) |
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197 |
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198 defer.returnValue(items) |
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199 |
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200 |
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201 def _infosEb(self, failure_, entity_jid): |
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202 failure_.trap(StanzaError) |
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203 log.warning(_(u"Error while requesting [%(jid)s]: %(error)s") % {'jid': entity_jid.full(), |
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204 'error': failure_.getErrorMessage()}) |
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205 |
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206 def findServiceEntities(self, category, type_, jid_=None, profile=C.PROF_KEY_NONE): |
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207 """Return all available items of an entity which correspond to (category, type_) |
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208 |
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209 @param category: identity's category |
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210 @param type_: identitiy's type |
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211 @param jid_: the jid of the target server (None for profile's server) |
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212 @param profile: %(doc_profile)s |
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213 @return: a set of found entities |
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214 @raise defer.CancelledError: the request timed out |
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215 """ |
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216 found_entities = set() |
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217 |
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218 def infosCb(infos, entity_jid): |
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219 if (category, type_) in infos.identities: |
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220 found_entities.add(entity_jid) |
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221 |
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222 def gotItems(items): |
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223 defers_list = [] |
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224 for item in items: |
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225 info_d = self.getInfos(item.entity, profile) |
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226 info_d.addCallbacks(infosCb, self._infosEb, [item.entity], None, [item.entity]) |
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227 defers_list.append(info_d) |
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228 return defer.DeferredList(defers_list) |
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229 |
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230 d = self.getItems(jid_, profile=profile) |
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231 d.addCallback(gotItems) |
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232 d.addCallback(lambda dummy: found_entities) |
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233 reactor.callLater(TIMEOUT, d.cancel) # FIXME: one bad service make a general timeout |
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234 return d |
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235 |
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236 def findFeaturesSet(self, features, identity=None, jid_=None, profile=C.PROF_KEY_NONE): |
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237 """Return entities (including jid_ and its items) offering features |
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238 |
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239 @param features: iterable of features which must be present |
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240 @param identity(None, tuple(unicode, unicode)): if not None, accept only this (category/type) identity |
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241 @param jid_: the jid of the target server (None for profile's server) |
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242 @param profile: %(doc_profile)s |
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243 @return: a set of found entities |
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244 """ |
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245 client = self.host.getClient(profile) |
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246 if jid_ is None: |
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247 jid_ = jid.JID(client.jid.host) |
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248 features = set(features) |
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249 found_entities = set() |
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250 |
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251 def infosCb(infos, entity): |
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252 if identity is not None and identity not in infos.identities: |
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253 return |
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254 if features.issubset(infos.features): |
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255 found_entities.add(entity) |
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256 |
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257 def gotItems(items): |
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258 defer_list = [] |
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259 for entity in [jid_] + [item.entity for item in items]: |
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260 infos_d = self.getInfos(entity, profile) |
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261 infos_d.addCallbacks(infosCb, self._infosEb, [entity], None, [entity]) |
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262 defer_list.append(infos_d) |
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263 return defer.DeferredList(defer_list) |
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264 |
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265 d = self.getItems(jid_, profile=profile) |
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266 d.addCallback(gotItems) |
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267 d.addCallback(lambda dummy: found_entities) |
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268 reactor.callLater(TIMEOUT, d.cancel) # FIXME: one bad service make a general timeout |
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269 return d |
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270 |
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271 def generateHash(self, services): |
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272 """ Generate a unique hash for given service |
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273 |
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274 hash algorithm is the one described in XEP-0115 |
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275 @param services: iterable of disco.DiscoIdentity/disco.DiscoFeature, as returned by discoHandler.info |
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276 |
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277 """ |
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278 s = [] |
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279 byte_identities = [ByteIdentity(service) for service in services if isinstance(service, disco.DiscoIdentity)] # FIXME: lang must be managed here |
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280 byte_identities.sort(key=lambda i: i.lang) |
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281 byte_identities.sort(key=lambda i: i.idType) |
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282 byte_identities.sort(key=lambda i: i.category) |
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283 for identity in byte_identities: |
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284 s.append(str(identity)) |
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285 s.append('<') |
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286 byte_features = [service.encode('utf-8') for service in services if isinstance(service, disco.DiscoFeature)] |
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287 byte_features.sort() # XXX: the default sort has the same behaviour as the requested RFC 4790 i;octet sort |
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288 for feature in byte_features: |
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289 s.append(feature) |
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290 s.append('<') |
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291 #TODO: manage XEP-0128 data form here |
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292 cap_hash = b64encode(sha1(''.join(s)).digest()) |
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293 log.debug(_(u'Capability hash generated: [%s]') % cap_hash) |
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294 return cap_hash |
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295 |
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296 @defer.inlineCallbacks |
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297 def _discoInfos(self, entity_jid_s, profile_key=C.PROF_KEY_NONE): |
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298 """ Discovery method for the bridge |
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299 @param entity_jid_s: entity we want to discover |
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300 |
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301 @return: list of tuples |
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302 """ |
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303 profile = self.host.memory.getProfileName(profile_key) |
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304 entity = jid.JID(entity_jid_s) |
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305 disco_infos = yield self.getInfos(entity, profile) |
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306 extensions = {} |
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307 for form_type, form in disco_infos.extensions.items(): |
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308 fields = [] |
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309 for field in form.fieldList: |
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310 data = {'type': field.fieldType} |
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311 for attr in ('var', 'label', 'desc'): |
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312 value = getattr(field, attr) |
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313 if value is not None: |
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314 data[attr] = value |
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315 |
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316 values = [field.value] if field.value is not None else field.values |
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317 fields.append((data, values)) |
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318 |
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319 extensions[form_type or ""] = fields |
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320 |
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321 defer.returnValue((disco_infos.features, |
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322 [(cat, type_, name or '') for (cat, type_), name in disco_infos.identities.items()], |
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323 extensions)) |
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324 |
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325 @defer.inlineCallbacks |
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326 def _discoItems(self, entity_jid_s, profile_key=C.PROF_KEY_NONE): |
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327 """ Discovery method for the bridge |
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328 @param entity_jid_s: entity we want to discover |
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329 |
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330 @return: list of tuples""" |
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331 profile = self.host.memory.getProfileName(profile_key) |
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332 entity = jid.JID(entity_jid_s) |
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333 disco_items = yield self.getItems(entity, profile=profile) |
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334 defer.returnValue([(item.entity.full(), item.nodeIdentifier or '', item.name or '') for item in disco_items]) |