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annotate libervia/backend/plugins/plugin_xep_0446.py @ 4165:81faa85c9cfa

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author Goffi <goffi@goffi.org>
date Tue, 28 Nov 2023 17:41:49 +0100
parents 4b842c1fb686
children 0d7bb4df2343
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dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
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1 #!/usr/bin/env python3
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2
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3 # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org)
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4
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5 # This program is free software: you can redistribute it and/or modify
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6 # it under the terms of the GNU Affero General Public License as published by
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7 # the Free Software Foundation, either version 3 of the License, or
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8 # (at your option) any later version.
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9
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU Affero General Public License for more details.
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14
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15 # You should have received a copy of the GNU Affero General Public License
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16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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17
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18 from logging import exception
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19 from typing import Optional, Union, Tuple, Dict, Any
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20 from pathlib import Path
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21
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22 from twisted.words.xish import domish
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23
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24 from libervia.backend.core.constants import Const as C
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25 from libervia.backend.core.i18n import _
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26 from libervia.backend.core.log import getLogger
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27 from libervia.backend.core import exceptions
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28 from libervia.backend.tools import utils
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29
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30 log = getLogger(__name__)
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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: "File Metadata Element",
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35 C.PI_IMPORT_NAME: "XEP-0446",
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36 C.PI_TYPE: "XEP",
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37 C.PI_MODES: C.PLUG_MODE_BOTH,
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38 C.PI_PROTOCOLS: ["XEP-0446"],
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39 C.PI_DEPENDENCIES: ["XEP-0300"],
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40 C.PI_MAIN: "XEP_0446",
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41 C.PI_HANDLER: "no",
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42 C.PI_DESCRIPTION: _("""Implementation of XEP-0446 (File Metadata Element)"""),
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43 }
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44
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45 NS_FILE_METADATA = "urn:xmpp:file:metadata:0"
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46
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47
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48 class XEP_0446:
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49
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50 def __init__(self, host):
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51 log.info(_("XEP-0446 (File Metadata Element) plugin initialization"))
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52 host.register_namespace("file-metadata", NS_FILE_METADATA)
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53 self._hash = host.plugins["XEP-0300"]
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54
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55 def get_file_metadata_elt(
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56 self,
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57 name: Optional[str] = None,
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58 media_type: Optional[str] = None,
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59 desc: Optional[str] = None,
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60 size: Optional[int] = None,
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61 file_hash: Optional[Tuple[str, str]] = None,
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62 date: Optional[Union[float, int]] = None,
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63 width: Optional[int] = None,
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64 height: Optional[int] = None,
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65 length: Optional[int] = None,
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66 thumbnail: Optional[str] = None,
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67 ) -> domish.Element:
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68 """Generate the element describing a file
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69
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70 @param name: name of the file
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71 @param media_type: media-type
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72 @param desc: description
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73 @param size: size in bytes
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74 @param file_hash: (algo, hash)
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75 @param date: timestamp of the last modification datetime
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76 @param width: image width in pixels
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77 @param height: image height in pixels
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78 @param length: video length in seconds
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79 @param thumbnail: URL to a thumbnail
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80 @return: ``<file/>`` element
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81 """
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82 if name:
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83 name = Path(name).name
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84 file_elt = domish.Element((NS_FILE_METADATA, "file"))
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85 for name, value in (
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86 ("name", name),
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87 ("media-type", media_type),
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88 ("desc", desc),
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89 ("size", size),
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90 ("width", width),
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91 ("height", height),
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92 ("length", length),
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93 ):
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94 if value is not None:
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95 file_elt.addElement(name, content=str(value))
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96 if file_hash is not None:
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97 hash_algo, hash_ = file_hash
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98 file_elt.addChild(self._hash.build_hash_elt(hash_, hash_algo))
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99 if date is not None:
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100 file_elt.addElement("date", utils.xmpp_date(date))
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101 if thumbnail is not None:
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102 # TODO: implement thumbnails
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103 log.warning("thumbnail is not implemented yet")
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104 return file_elt
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105
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106 def parse_file_metadata_elt(
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107 self,
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108 file_metadata_elt: domish.Element
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109 ) -> Dict[str, Any]:
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110 """Parse <file/> element
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111
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112 @param file_metadata_elt: <file/> element
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113 a parent element can also be used
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114 @return: file metadata. It's a dict whose keys correspond to
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115 [get_file_metadata_elt] parameters
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116 @raise exceptions.NotFound: no <file/> element has been found
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117 """
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118
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119 if file_metadata_elt.name != "file":
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120 try:
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121 file_metadata_elt = next(
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122 file_metadata_elt.elements(NS_FILE_METADATA, "file")
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123 )
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124 except StopIteration:
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125 raise exceptions.NotFound
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126 data: Dict[str, Any] = {}
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127
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128 for key, type_ in (
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129 ("name", str),
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130 ("media-type", str),
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131 ("desc", str),
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132 ("size", int),
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133 ("date", "timestamp"),
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134 ("width", int),
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135 ("height", int),
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parents:
diff changeset
136 ("length", int),
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
137 ):
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
138 elt = next(file_metadata_elt.elements(NS_FILE_METADATA, key), None)
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
139 if elt is not None:
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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140 if type_ in (str, int):
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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141 content = str(elt)
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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142 if key == "name":
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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143 # we avoid malformed names or names containing path elements
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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144 content = Path(content).name
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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145 elif key == "media-type":
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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146 key = "media_type"
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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147 data[key] = type_(content)
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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148 elif type == "timestamp":
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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149 data[key] = utils.parse_xmpp_date(str(elt))
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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150 else:
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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151 raise exceptions.InternalError
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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152
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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153 try:
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3922
diff changeset
154 algo, hash_ = self._hash.parse_hash_elt(file_metadata_elt)
3896
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
155 except exceptions.NotFound:
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
156 pass
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
157 except exceptions.DataError:
4071
4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend`
Goffi <goffi@goffi.org>
parents: 4037
diff changeset
158 from libervia.backend.tools.xml_tools import p_fmt_elt
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3922
diff changeset
159 log.warning("invalid <hash/> element:\n{p_fmt_elt(file_metadata_elt)}")
3896
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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160 else:
3922
0ff265725489 plugin XEP-0447: handle attachment and download:
Goffi <goffi@goffi.org>
parents: 3896
diff changeset
161 data["file_hash"] = (algo, hash_)
3896
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
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162
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
163 # TODO: thumbnails
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
164
dbf0c7faaf49 plugin XEP-0446: File Metadata implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
165 return data