Mercurial > libervia-backend

annotate src/plugins/plugin_xep_0059.py @ 1304:1a61b18703c4 frontends_multi_profiles

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quick frontend (quick widgets): class' __name__ method is used for classes_map hash because the use of class directly was causing bugs with pyjamas (difficult to find, several MicroblogPanel instances were added only once in Libervia's TabPanel, hash method seemed buggy)
author Goffi <goffi@goffi.org>
date Fri, 06 Feb 2015 19:05:51 +0100
parents 16484ebb695b
children ea692d51a0ee
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1219
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
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parents:
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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 plugin for Result Set Management (XEP-0059)
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jérôme Poisson (goffi@goffi.org)
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6 # Copyright (C) 2013, 2014 Adrien Cossa (souliane@mailoo.org)
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7
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8 # This program is free software: you can redistribute it and/or modify
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9 # it under the terms of the GNU Affero General Public License as published by
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10 # the Free Software Foundation, either version 3 of the License, or
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11 # (at your option) any later version.
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12
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13 # This program is distributed in the hope that it will be useful,
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 # GNU Affero General Public License for more details.
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17
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18 # You should have received a copy of the GNU Affero General Public License
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
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19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20
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21 from sat.core.i18n import _
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22 from sat.core.log import getLogger
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23 log = getLogger(__name__)
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24
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25 from twisted.words.xish import domish
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26 from wokkel import disco, iwokkel
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27 try:
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28 from twisted.words.protocols.xmlstream import XMPPHandler
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29 except ImportError:
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30 from wokkel.subprotocols import XMPPHandler
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31 from zope.interface import implements
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32
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33
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34 NS_RSM = 'http://jabber.org/protocol/rsm'
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35
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36 PLUGIN_INFO = {
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37 "name": "Result Set Management",
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38 "import_name": "XEP-0059",
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39 "type": "XEP",
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40 "protocols": ["XEP-0059"],
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41 "main": "XEP_0059",
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42 "handler": "no",
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43 "description": _("""Implementation of Result Set Management""")
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44 }
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45
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46
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47 class XEP_0059(object):
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48
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49 def __init__(self, host):
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50 log.info(_("Result Set Management plugin initialization"))
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51 self.host = host
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52
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53 def requestPage(self, stanza, limit=10, index=None, after=None, before=None):
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54 """Embed a RSM page request in the given stanza.
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55
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56 @param stanza (domish.Element): any stanza to which RSM applies
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57 @param limit (int): the maximum number of items in the page
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58 @param index (int): the starting index of the requested page
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59 @param after (str, int): the element immediately preceding the page
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60 @param before (str, int): the element immediately following the page
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61 """
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62 main_elt = None
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63 try:
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64 main_elt = domish.generateElementsNamed(stanza.elements(), name="query").next()
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65 except StopIteration:
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66 try:
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67 main_elt = domish.generateElementsNamed(stanza.elements(), name="pubsub").next()
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68 except StopIteration:
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69 log.warning("Injection of a RSM element only applies to query or pubsub stanzas")
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70 return
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71 limit = str(int(limit))
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72
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73 # in case the service doesn't support RSM, do this at least
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74 main_elt.items.attributes['max_items'] = limit
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75
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76 set_elt = main_elt.addElement('set', NS_RSM)
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77 set_elt.addElement('max').addContent(limit)
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78 if index:
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79 assert(after is None and before is None)
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80 set_elt.addElement('index').addContent(str(int(index)))
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81 if after:
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82 assert(before is None) # could not specify both at the same time
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83 set_elt.addElement('after').addContent(str(after))
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84 if before is not None:
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85 if before == '': # request the last page, according to http://xmpp.org/extensions/xep-0059.html#last
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86 set_elt.addElement('before')
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87 else:
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88 set_elt.addElement('before').addContent(str(before))
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89
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90 def countItems(self, stanza):
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91 """Count the items without retrieving any of them.
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92
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93 @param stanza (domish.Element): any stanza to which RSM applies
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94 """
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95 self.requestPage(stanza, limit=0)
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96
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97 def extractMetadata(self, stanza):
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98 """Extract the RSM metadata from the given stanza.
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99
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100 @param stanza (domish.Element, wokkel.pubsub.PubSubRequest):
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101 any stanza to which RSM applies. When used by XEP-0060,
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102 wokkel's PubSubRequest instance is also accepted.
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103 @return: dict containing the page metadata
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104 """
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105 try:
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souliane <souliane@mailoo.org>
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106 main_elt = domish.generateElementsNamed(stanza.elements(), name="query").next()
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souliane <souliane@mailoo.org>
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107 except StopIteration:
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108 try:
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109 main_elt = domish.generateElementsNamed(stanza.elements(), name="pubsub").next()
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110 except StopIteration:
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111 log.warning("Extracting data from a RSM element only applies to query or pubsub stanzas")
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112 return {}
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113 try:
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114 set_elt = domish.generateElementsQNamed(main_elt.elements(), name="set", uri=NS_RSM).next()
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115 except StopIteration:
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116 log.debug("There's no RSM element in the stanza")
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117 return {}
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118
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119 data = {}
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120 elts = set_elt.elements()
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121 try:
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122 elt = elts.next()
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
souliane <souliane@mailoo.org>
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123 if elt.name == "first":
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124 data["first"] = "".join(elt.children)
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125 data["first_index"] = int(elt.getAttribute("index"))
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126 elif elt.name == "last":
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127 data["last"] = "".join(elt.children)
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128 elif elt.name == "count":
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129 data["count"] = int("".join(elt.children))
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130 except StopIteration:
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131 pass
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souliane <souliane@mailoo.org>
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132 if "count" not in data:
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
souliane <souliane@mailoo.org>
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133 log.warning("There's no 'count' element in the RSM element!")
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134 return data
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
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135
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
souliane <souliane@mailoo.org>
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136
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
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137 class XEP_0059_handler(XMPPHandler):
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138 implements(iwokkel.IDisco)
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139
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souliane <souliane@mailoo.org>
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140 def __init__(self, plugin_parent, profile):
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141 self.plugin_parent = plugin_parent
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142 self.host = plugin_parent.host
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143 self.profile = profile
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parents:
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144
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souliane <souliane@mailoo.org>
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145 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
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146 return [disco.DiscoFeature(NS_RSM)]
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
souliane <souliane@mailoo.org>
parents:
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147
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
souliane <souliane@mailoo.org>
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148 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
16484ebb695b plugin XEP-0059: first draft, pubsub and jabber search do not exploit it yet
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149 return []