Mercurial > libervia-backend

annotate src/plugins/plugin_import.py @ 2501:3b67fe672206

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core (memory): file metadata handling methods: - checkFilePermission check that requested permission(s) are granted for a file (without checking the parents) - checkPermissionToRoot check that requested permission(s) are granted for a file and all its parents - getFiles retrieve file(s) according to filter, and check permissions by default - setFile create a file (and its parents if needed) and check permissions by default
author Goffi <goffi@goffi.org>
date Wed, 28 Feb 2018 18:28:39 +0100
parents 0046283a285d
children
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SàT plugin for generic data import handling
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5 # Copyright (C) 2009-2018 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.constants import Const as C
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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.internet import defer
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25 from sat.core import exceptions
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26 from twisted.words.protocols.jabber import jid
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27 from functools import partial
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28 import collections
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29 import uuid
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30 import json
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31
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32
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33 PLUGIN_INFO = {
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34 C.PI_NAME: "import",
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35 C.PI_IMPORT_NAME: "IMPORT",
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36 C.PI_TYPE: C.PLUG_TYPE_IMPORT,
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37 C.PI_DEPENDENCIES: [],
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38 C.PI_MAIN: "ImportPlugin",
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39 C.PI_HANDLER: "no",
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40 C.PI_DESCRIPTION: _(u"""Generic import plugin, base for specialized importers""")
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41 }
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42
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43 Importer = collections.namedtuple('Importer', ('callback', 'short_desc', 'long_desc'))
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45
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46 class ImportPlugin(object):
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47
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48 def __init__(self, host):
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49 log.info(_("plugin Import initialization"))
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50 self.host = host
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51
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52 def initialize(self, import_handler, name):
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53 """Initialize a specialized import handler
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54
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55 @param import_handler(object): specialized import handler instance
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56 must have the following methods:
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57 - importItem: import a single main item (i.e. prepare data for publishing)
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58 - importSubitems: import sub items (i.e. items linked to main item, e.g. comments).
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59 Must return a dict with kwargs for recursiveImport if items are to be imported recursively.
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60 At least "items_import_data", "service" and "node" keys must be provided.
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61 if None is returned, no recursion will be done to import subitems, but import can still be done directly by the method.
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62 - publishItem: actualy publish an item
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63 - itemFilters: modify item according to options
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64 @param name(unicode): import handler name
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65 """
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66 assert name == name.lower().strip()
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67 log.info(_(u'initializing {name} import handler').format(name=name))
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68 import_handler.name = name
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69 import_handler.register = partial(self.register, import_handler)
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70 import_handler.unregister = partial(self.unregister, import_handler)
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71 import_handler.importers = {}
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72 def _import(name, location, options, pubsub_service, pubsub_node, profile):
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73 return self._doImport(import_handler, name, location, options, pubsub_service, pubsub_node, profile)
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74 def _importList():
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75 return self.listImporters(import_handler)
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76 def _importDesc(name):
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77 return self.getDescription(import_handler, name)
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78
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79 self.host.bridge.addMethod(name + "Import", ".plugin", in_sign='ssa{ss}sss', out_sign='s', method=_import, async=True)
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80 self.host.bridge.addMethod(name + "ImportList", ".plugin", in_sign='', out_sign='a(ss)', method=_importList)
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81 self.host.bridge.addMethod(name + "ImportDesc", ".plugin", in_sign='s', out_sign='(ss)', method=_importDesc)
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82
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83 def getProgress(self, import_handler, progress_id, profile):
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84 client = self.host.getClient(profile)
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85 return client._import[import_handler.name][progress_id]
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86
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87 def listImporters(self, import_handler):
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88 importers = import_handler.importers.keys()
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89 importers.sort()
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90 return [(name, import_handler.importers[name].short_desc) for name in import_handler.importers]
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91
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92 def getDescription(self, import_handler, name):
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93 """Return import short and long descriptions
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94
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95 @param name(unicode): importer name
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96 @return (tuple[unicode,unicode]): short and long description
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97 """
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98 try:
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99 importer = import_handler.importers[name]
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100 except KeyError:
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101 raise exceptions.NotFound(u"{handler_name} importer not found [{name}]".format(
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102 handler_name = import_handler.name,
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103 name = name))
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104 else:
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105 return importer.short_desc, importer.long_desc
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106
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107 def _doImport(self, import_handler, name, location, options, pubsub_service='', pubsub_node='', profile=C.PROF_KEY_NONE):
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108 client = self.host.getClient(profile)
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109 options = {key: unicode(value) for key, value in options.iteritems()}
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110 for option in import_handler.BOOL_OPTIONS:
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111 try:
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112 options[option] = C.bool(options[option])
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113 except KeyError:
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114 pass
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115 for option in import_handler.JSON_OPTIONS:
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116 try:
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117 options[option] = json.loads(options[option])
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118 except ValueError:
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119 raise exceptions.DataError(_(u'invalid json option: {name}').format(name=option))
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120 pubsub_service = jid.JID(pubsub_service) if pubsub_service else None
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121 return self.doImport(client, import_handler, unicode(name), unicode(location), options, pubsub_service, pubsub_node or None)
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122
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123 @defer.inlineCallbacks
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124 def doImport(self, client, import_handler, name, location, options=None, pubsub_service=None, pubsub_node=None):
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125 """Import data
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126
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127 @param import_handler(object): instance of the import handler
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128 @param name(unicode): name of the importer
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129 @param location(unicode): location of the data to import
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130 can be an url, a file path, or anything which make sense
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131 check importer description for more details
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132 @param options(dict, None): extra options.
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133 @param pubsub_service(jid.JID, None): jid of the PubSub service where data must be imported
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134 None to use profile's server
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135 @param pubsub_node(unicode, None): PubSub node to use
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136 None to use importer's default node
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137 @return (unicode): progress id
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138 """
cdaa58e14553 plugin import: generic data import plugin:
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139 if options is None:
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140 options = {}
cdaa58e14553 plugin import: generic data import plugin:
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141 else:
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
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142 for opt_name, opt_default in import_handler.OPT_DEFAULTS.iteritems():
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143 # we want a filled options dict, with all empty or False values removed
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144 try:
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145 value =options[opt_name]
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146 except KeyError:
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
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147 if opt_default:
cdaa58e14553 plugin import: generic data import plugin:
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148 options[opt_name] = opt_default
cdaa58e14553 plugin import: generic data import plugin:
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149 else:
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150 if not value:
cdaa58e14553 plugin import: generic data import plugin:
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151 del options[opt_name]
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152
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153 try:
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154 importer = import_handler.importers[name]
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155 except KeyError:
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
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156 raise exceptions.NotFound(u"Importer [{}] not found".format(name))
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157 items_import_data, items_count = yield importer.callback(client, location, options)
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158 progress_id = unicode(uuid.uuid4())
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159 try:
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Goffi <goffi@goffi.org>
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160 _import = client._import
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161 except AttributeError:
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Goffi <goffi@goffi.org>
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162 _import = client._import = {}
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163 progress_data = _import.setdefault(import_handler.name, {})
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164 progress_data[progress_id] = {u'position': '0'}
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165 if items_count is not None:
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166 progress_data[progress_id]['size'] = unicode(items_count)
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167 metadata = {'name': u'{}: {}'.format(name, location),
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168 'direction': 'out',
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169 'type': import_handler.name.upper() + '_IMPORT'
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170 }
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
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171 self.host.registerProgressCb(progress_id, partial(self.getProgress, import_handler), metadata, profile=client.profile)
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172 self.host.bridge.progressStarted(progress_id, metadata, client.profile)
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173 session = { # session data, can be used by importers
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174 u'root_service': pubsub_service,
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175 u'root_node': pubsub_node
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176 }
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177 self.recursiveImport(client, import_handler, items_import_data, progress_id, session, options, None, pubsub_service, pubsub_node)
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178 defer.returnValue(progress_id)
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179
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180 @defer.inlineCallbacks
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181 def recursiveImport(self, client, import_handler, items_import_data, progress_id, session, options, return_data=None, service=None, node=None, depth=0):
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182 """Do the import recursively
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183
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184 @param import_handler(object): instance of the import handler
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185 @param items_import_data(iterable): iterable of data as specified in [register]
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186 @param progress_id(unicode): id of progression
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187 @param session(dict): data for this import session
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parents: 2369
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188 can be used by importer so store any useful data
2390
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189 "root_service" and "root_node" are set to the main pubsub service and node of the import
2369
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190 @param options(dict): import options
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191 @param return_data(dict): data to return on progressFinished
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192 @param service(jid.JID, None): PubSub service to use
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193 @param node(unicode, None): PubSub node to use
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194 @param depth(int): level of recursion
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195 """
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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196 if return_data is None:
cdaa58e14553 plugin import: generic data import plugin:
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197 return_data = {}
cdaa58e14553 plugin import: generic data import plugin:
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198 for idx, item_import_data in enumerate(items_import_data):
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199 item_data = yield import_handler.importItem(client, item_import_data, session, options, return_data, service, node)
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Goffi <goffi@goffi.org>
parents: 2369
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200 yield import_handler.itemFilters(client, item_data, session, options)
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parents: 2369
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201 recurse_kwargs = yield import_handler.importSubItems(client, item_import_data, item_data, session, options)
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Goffi <goffi@goffi.org>
parents: 2369
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202 yield import_handler.publishItem(client, item_data, service, node, session)
2369
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parents:
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203
cdaa58e14553 plugin import: generic data import plugin:
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204 if recurse_kwargs is not None:
cdaa58e14553 plugin import: generic data import plugin:
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parents:
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205 recurse_kwargs['client'] = client
cdaa58e14553 plugin import: generic data import plugin:
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206 recurse_kwargs['import_handler'] = import_handler
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207 recurse_kwargs['progress_id'] = progress_id
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208 recurse_kwargs['session'] = session
2369
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209 recurse_kwargs.setdefault('options', options)
cdaa58e14553 plugin import: generic data import plugin:
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210 recurse_kwargs['return_data'] = return_data
cdaa58e14553 plugin import: generic data import plugin:
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211 recurse_kwargs['depth'] = depth + 1
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
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212 log.debug(_(u"uploading subitems"))
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213 yield self.recursiveImport(**recurse_kwargs)
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214
cdaa58e14553 plugin import: generic data import plugin:
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215 if depth == 0:
cdaa58e14553 plugin import: generic data import plugin:
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216 client._import[import_handler.name][progress_id]['position'] = unicode(idx+1)
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217
cdaa58e14553 plugin import: generic data import plugin:
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218 if depth == 0:
cdaa58e14553 plugin import: generic data import plugin:
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219 self.host.bridge.progressFinished(progress_id,
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220 return_data,
cdaa58e14553 plugin import: generic data import plugin:
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221 client.profile)
cdaa58e14553 plugin import: generic data import plugin:
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222 self.host.removeProgressCb(progress_id, client.profile)
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223 del client._import[import_handler.name][progress_id]
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224
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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225 def register(self, import_handler, name, callback, short_desc='', long_desc=''):
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Goffi <goffi@goffi.org>
parents:
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226 """Register an Importer method
cdaa58e14553 plugin import: generic data import plugin:
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parents:
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227
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
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228 @param name(unicode): unique importer name, should indicate the software it can import and always lowercase
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229 @param callback(callable): method to call:
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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230 the signature must be (client, location, options) (cf. [doImport])
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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231 the importer must return a tuple with (items_import_data, items_count)
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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232 items_import_data(iterable[dict]) data specific to specialized importer
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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233 cf. importItem docstring of specialized importer for details
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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234 items_count (int, None) indicate the total number of items (without subitems)
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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235 useful to display a progress indicator when the iterator is a generator
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
diff changeset
236 use None if you can't guess the total number of items
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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237 @param short_desc(unicode): one line description of the importer
cdaa58e14553 plugin import: generic data import plugin:
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238 @param long_desc(unicode): long description of the importer, its options, etc.
cdaa58e14553 plugin import: generic data import plugin:
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parents:
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239 """
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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240 name = name.lower()
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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241 if name in import_handler.importers:
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
diff changeset
242 raise exceptions.ConflictError(_(u"An {handler_name} importer with the name {name} already exist").format(
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
diff changeset
243 handler_name = import_handler.name,
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
diff changeset
244 name = name))
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
diff changeset
245 import_handler.importers[name] = Importer(callback, short_desc, long_desc)
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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246
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
diff changeset
247 def unregister(self, import_handler, name):
cdaa58e14553 plugin import: generic data import plugin:
Goffi <goffi@goffi.org>
parents:
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248 del import_handler.importers[name]