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annotate libervia/server/session_iface.py @ 1146:76d75423ef53

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server: tasks manager first draft: A new task manager will check /tasks directory of website to scripts to execute before launching the site. This allows to generate docs, scripts, or do anything else useful. Generated files are put in in sat local dir, in cache, and are accessible from the website using the new "build_dir" variable.
author Goffi <goffi@goffi.org>
date Fri, 25 Jan 2019 08:58:41 +0100
parents 2af117bfe6cc
children 6424d3684d1e
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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 # Libervia: a SAT frontend
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5 # Copyright (C) 2009-2019 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 from zope.interface import Interface, Attribute, implements
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20 from sat.tools.common import data_objects
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21 from libervia.server.constants import Const as C
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22 from collections import OrderedDict
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23 import os.path
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24 import shortuuid
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25 import time
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26
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27 FLAGS_KEY = "_flags"
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28 MAX_CACHE_AFFILIATIONS = 100 # number of nodes to keep in cache
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30
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31 class ISATSession(Interface):
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32 profile = Attribute("Sat profile")
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33 jid = Attribute("JID associated with the profile")
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34 uuid = Attribute("uuid associated with the profile session")
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35 identities = Attribute("Identities of XMPP entities")
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36
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37
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38 class SATSession(object):
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39 implements(ISATSession)
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40
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41 def __init__(self, session):
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42 self.profile = None
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43 self.jid = None
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44 self.started = time.time()
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45 # time when the backend session was started
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46 self.backend_started = None
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47 self.uuid = unicode(shortuuid.uuid())
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48 self.identities = data_objects.Identities()
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49 self.csrf_token = unicode(shortuuid.uuid())
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50 self.pages_data = {} # used to keep data accross reloads (key is page instance)
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51 self.affiliations = OrderedDict() # cache for node affiliations
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52
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53 @property
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54 def cache_dir(self):
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55 if self.profile is None:
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56 return self.service_cache_url + u"/"
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57 return os.path.join(u"/", C.CACHE_DIR, self.uuid) + u"/"
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58
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59 @property
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60 def connected(self):
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61 return self.profile is not None
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62
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63 @property
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64 def guest(self):
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65 """True if this is a guest session"""
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66 if self.profile is None:
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67 return False
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68 else:
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69 return self.profile.startswith("guest@@")
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70
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71 def getPageData(self, page, key):
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72 """get session data for a page
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73
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74 @param page(LiberviaPage): instance of the page
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75 @param key(object): data key
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76 return (None, object): value of the key
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77 None if not found or page_data doesn't exist
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78 """
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79 return self.pages_data.get(page, {}).get(key)
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80
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81 def popPageData(self, page, key, default=None):
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82 """like getPageData, but remove key once value is gotten
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83
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84 @param page(LiberviaPage): instance of the page
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85 @param key(object): data key
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86 @param default(object): value to return if key is not found
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87 @return (object): found value or default
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88 """
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89 page_data = self.pages_data.get(page)
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90 if page_data is None:
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91 return default
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92 value = page_data.pop(key, default)
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93 if not page_data:
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94 # no need to keep unused page_data
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95 del self.pages_data[page]
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96 return value
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97
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98 def setPageData(self, page, key, value):
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99 """set data to persist on reload
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100
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101 @param page(LiberviaPage): instance of the page
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102 @param key(object): data key
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103 @param value(object): value to set
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104 @return (object): set value
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105 """
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106 page_data = self.pages_data.setdefault(page, {})
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107 page_data[key] = value
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108 return value
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109
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110 def setPageFlag(self, page, flag):
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111 """set a flag for this page
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112
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113 @param page(LiberviaPage): instance of the page
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114 @param flag(unicode): flag to set
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115 """
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116 flags = self.getPageData(page, FLAGS_KEY)
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117 if flags is None:
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118 flags = self.setPageData(page, FLAGS_KEY, set())
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119 flags.add(flag)
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120
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121 def popPageFlag(self, page, flag):
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122 """return True if flag is set
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123
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124 flag is removed if it was set
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125 @param page(LiberviaPage): instance of the page
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126 @param flag(unicode): flag to set
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127 @return (bool): True if flaag was set
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128 """
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129 page_data = self.pages_data.get(page, {})
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130 flags = page_data.get(FLAGS_KEY)
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131 if flags is None:
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132 return False
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133 if flag in flags:
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134 flags.remove(flag)
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135 # we remove data if they are not used anymore
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136 if not flags:
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137 del page_data[FLAGS_KEY]
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138 if not page_data:
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139 del self.pages_data[page]
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140 return True
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141 else:
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142 return False
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143
1093
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144 def getAffiliation(self, service, node):
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145 """retrieve affiliation for a pubsub node
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146
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147 @param service(jid.JID): pubsub service
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148 @param node(unicode): pubsub node
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149 @return (unicode, None): affiliation, or None if it is not in cache
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150 """
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151 if service.resource:
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152 raise ValueError(u"Service must not have a resource")
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153 if not node:
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154 raise ValueError(u"node must be set")
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155 try:
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156 affiliation = self.affiliations.pop((service, node))
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157 except KeyError:
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158 return None
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159 else:
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160 # we replace at the top to get the most recently used on top
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161 # so less recently used will be removed if cache is full
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162 self.affiliations[(service, node)] = affiliation
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163 return affiliation
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164
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165 def setAffiliation(self, service, node, affiliation):
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166 """cache affiliation for a node
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167
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168 will empty cache when it become too big
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169 @param service(jid.JID): pubsub service
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170 @param node(unicode): pubsub node
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171 @param affiliation(unicode): affiliation to this node
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172 """
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173 if service.resource:
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174 raise ValueError(u"Service must not have a resource")
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175 if not node:
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Goffi <goffi@goffi.org>
parents: 1090
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176 raise ValueError(u"node must be set")
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177 self.affiliations[(service, node)] = affiliation
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diff changeset
178 while len(self.affiliations) > MAX_CACHE_AFFILIATIONS:
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diff changeset
179 self.affiliations.popitem(last=False)
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180
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181
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Goffi <goffi@goffi.org>
parents:
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182 class ISATGuestSession(Interface):
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parents:
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183 id = Attribute("UUID of the guest")
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Goffi <goffi@goffi.org>
parents:
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184 data = Attribute("data associated with the guest")
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Goffi <goffi@goffi.org>
parents:
diff changeset
185
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Goffi <goffi@goffi.org>
parents:
diff changeset
186
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Goffi <goffi@goffi.org>
parents:
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187 class SATGuestSession(object):
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Goffi <goffi@goffi.org>
parents:
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188 implements(ISATGuestSession)
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Goffi <goffi@goffi.org>
parents:
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189
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Goffi <goffi@goffi.org>
parents:
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190 def __init__(self, session):
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Goffi <goffi@goffi.org>
parents:
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191 self.id = None
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parents:
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192 self.data = None