root / snf-cyclades-app / synnefo / plankton / backend.py @ 8f53cfa3
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1 | c34de90f | Giorgos Verigakis | # Copyright 2011 GRNET S.A. All rights reserved.
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2 | c34de90f | Giorgos Verigakis | #
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3 | c34de90f | Giorgos Verigakis | # Redistribution and use in source and binary forms, with or
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4 | c34de90f | Giorgos Verigakis | # without modification, are permitted provided that the following
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5 | c34de90f | Giorgos Verigakis | # conditions are met:
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6 | c34de90f | Giorgos Verigakis | #
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7 | c34de90f | Giorgos Verigakis | # 1. Redistributions of source code must retain the above
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8 | c34de90f | Giorgos Verigakis | # copyright notice, this list of conditions and the following
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9 | c34de90f | Giorgos Verigakis | # disclaimer.
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10 | c34de90f | Giorgos Verigakis | #
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11 | c34de90f | Giorgos Verigakis | # 2. Redistributions in binary form must reproduce the above
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12 | c34de90f | Giorgos Verigakis | # copyright notice, this list of conditions and the following
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13 | c34de90f | Giorgos Verigakis | # disclaimer in the documentation and/or other materials
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14 | c34de90f | Giorgos Verigakis | # provided with the distribution.
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15 | c34de90f | Giorgos Verigakis | #
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16 | c34de90f | Giorgos Verigakis | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | c34de90f | Giorgos Verigakis | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | c34de90f | Giorgos Verigakis | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | c34de90f | Giorgos Verigakis | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | c34de90f | Giorgos Verigakis | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | c34de90f | Giorgos Verigakis | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | c34de90f | Giorgos Verigakis | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | c34de90f | Giorgos Verigakis | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | c34de90f | Giorgos Verigakis | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | c34de90f | Giorgos Verigakis | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | c34de90f | Giorgos Verigakis | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | c34de90f | Giorgos Verigakis | # POSSIBILITY OF SUCH DAMAGE.
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28 | c34de90f | Giorgos Verigakis | #
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29 | c34de90f | Giorgos Verigakis | # The views and conclusions contained in the software and
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30 | c34de90f | Giorgos Verigakis | # documentation are those of the authors and should not be
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31 | c34de90f | Giorgos Verigakis | # interpreted as representing official policies, either expressed
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32 | c34de90f | Giorgos Verigakis | # or implied, of GRNET S.A.
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33 | c34de90f | Giorgos Verigakis | |
34 | f5afd99b | Giorgos Verigakis | """
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35 | bfd9f988 | Giorgos Verigakis | The Plankton attributes are the following:
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36 | 0a72907b | Giorgos Verigakis | - checksum: the 'hash' meta
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37 | 7bd1d3b5 | Giorgos Verigakis | - container_format: stored as a user meta
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38 | 0a72907b | Giorgos Verigakis | - created_at: the 'modified' meta of the first version
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39 | 0a72907b | Giorgos Verigakis | - deleted_at: the timestamp of the last version
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40 | 7bd1d3b5 | Giorgos Verigakis | - disk_format: stored as a user meta
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41 | 0a72907b | Giorgos Verigakis | - id: the 'uuid' meta
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42 | f5afd99b | Giorgos Verigakis | - is_public: True if there is a * entry for the read permission
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43 | 0a72907b | Giorgos Verigakis | - location: generated based on the file's path
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44 | 7bd1d3b5 | Giorgos Verigakis | - name: stored as a user meta
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45 | 0a72907b | Giorgos Verigakis | - owner: the file's account
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46 | 7bd1d3b5 | Giorgos Verigakis | - properties: stored as user meta prefixed with PROPERTY_PREFIX
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47 | 0a72907b | Giorgos Verigakis | - size: the 'bytes' meta
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48 | 7bd1d3b5 | Giorgos Verigakis | - status: stored as a system meta
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49 | 7bd1d3b5 | Giorgos Verigakis | - store: is always 'pithos'
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50 | 0a72907b | Giorgos Verigakis | - updated_at: the 'modified' meta
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51 | f5afd99b | Giorgos Verigakis | """
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52 | f5afd99b | Giorgos Verigakis | |
53 | c34de90f | Giorgos Verigakis | import json |
54 | c23d211a | Giorgos Verigakis | import warnings |
55 | c34de90f | Giorgos Verigakis | |
56 | c34de90f | Giorgos Verigakis | from operator import itemgetter |
57 | 2db7d9df | Christos Stavrakakis | from time import gmtime, strftime |
58 | 469d0997 | Georgios D. Tsoukalas | from functools import wraps, partial |
59 | c34de90f | Giorgos Verigakis | |
60 | c34de90f | Giorgos Verigakis | from django.conf import settings |
61 | c34de90f | Giorgos Verigakis | |
62 | 2db7d9df | Christos Stavrakakis | from pithos.backends.base import NotAllowedError as PithosNotAllowedError |
63 | 469d0997 | Georgios D. Tsoukalas | import synnefo.lib.astakos as lib_astakos |
64 | 469d0997 | Georgios D. Tsoukalas | import logging |
65 | 469d0997 | Georgios D. Tsoukalas | |
66 | 469d0997 | Georgios D. Tsoukalas | logger = logging.getLogger(__name__) |
67 | c34de90f | Giorgos Verigakis | |
68 | c34de90f | Giorgos Verigakis | |
69 | 0a72907b | Giorgos Verigakis | PLANKTON_DOMAIN = 'plankton'
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70 | bfd9f988 | Giorgos Verigakis | PLANKTON_PREFIX = 'plankton:'
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71 | 7bd1d3b5 | Giorgos Verigakis | PROPERTY_PREFIX = 'property:'
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72 | 7bd1d3b5 | Giorgos Verigakis | |
73 | bfd9f988 | Giorgos Verigakis | PLANKTON_META = ('container_format', 'disk_format', 'name', 'properties', |
74 | bfd9f988 | Giorgos Verigakis | 'status')
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75 | c34de90f | Giorgos Verigakis | |
76 | 469d0997 | Georgios D. Tsoukalas | TRANSLATE_UUIDS = getattr(settings, 'TRANSLATE_UUIDS', False) |
77 | 469d0997 | Georgios D. Tsoukalas | |
78 | 469d0997 | Georgios D. Tsoukalas | def get_displaynames(names): |
79 | 469d0997 | Georgios D. Tsoukalas | try:
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80 | 469d0997 | Georgios D. Tsoukalas | auth_url = settings.ASTAKOS_URL |
81 | 469d0997 | Georgios D. Tsoukalas | url = auth_url.replace('im/authenticate', 'service/api/user_catalogs') |
82 | 469d0997 | Georgios D. Tsoukalas | token = settings.CYCLADES_ASTAKOS_SERVICE_TOKEN |
83 | 469d0997 | Georgios D. Tsoukalas | uuids = lib_astakos.get_displaynames(token, names, url=url) |
84 | 469d0997 | Georgios D. Tsoukalas | except Exception, e: |
85 | 469d0997 | Georgios D. Tsoukalas | logger.exception(e) |
86 | 469d0997 | Georgios D. Tsoukalas | return {}
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87 | 469d0997 | Georgios D. Tsoukalas | |
88 | 469d0997 | Georgios D. Tsoukalas | return uuids
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89 | 469d0997 | Georgios D. Tsoukalas | |
90 | c34de90f | Giorgos Verigakis | |
91 | 7bd1d3b5 | Giorgos Verigakis | def get_location(account, container, object): |
92 | 7bd1d3b5 | Giorgos Verigakis | assert '/' not in account, "Invalid account" |
93 | 7bd1d3b5 | Giorgos Verigakis | assert '/' not in container, "Invalid container" |
94 | 7bd1d3b5 | Giorgos Verigakis | return 'pithos://%s/%s/%s' % (account, container, object) |
95 | 7bd1d3b5 | Giorgos Verigakis | |
96 | 7784ab88 | Christos Stavrakakis | |
97 | 7bd1d3b5 | Giorgos Verigakis | def split_location(location): |
98 | 7bd1d3b5 | Giorgos Verigakis | """Returns (accout, container, object) from a location string"""
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99 | 7bd1d3b5 | Giorgos Verigakis | t = location.split('/', 4) |
100 | 7bd1d3b5 | Giorgos Verigakis | assert len(t) == 5, "Invalid location" |
101 | 7bd1d3b5 | Giorgos Verigakis | return t[2:5] |
102 | 7bd1d3b5 | Giorgos Verigakis | |
103 | 7bd1d3b5 | Giorgos Verigakis | |
104 | 0a72907b | Giorgos Verigakis | class BackendException(Exception): |
105 | 0a72907b | Giorgos Verigakis | pass
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106 | c34de90f | Giorgos Verigakis | |
107 | c34de90f | Giorgos Verigakis | |
108 | 2db7d9df | Christos Stavrakakis | class NotAllowedError(BackendException): |
109 | 2db7d9df | Christos Stavrakakis | pass
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110 | 2db7d9df | Christos Stavrakakis | |
111 | 2db7d9df | Christos Stavrakakis | |
112 | 7784ab88 | Christos Stavrakakis | from pithos.backends.util import PithosBackendPool |
113 | 7784ab88 | Christos Stavrakakis | POOL_SIZE = 8
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114 | 7784ab88 | Christos Stavrakakis | _pithos_backend_pool = \ |
115 | cc92b70f | Christos Stavrakakis | PithosBackendPool(POOL_SIZE, |
116 | cc92b70f | Christos Stavrakakis | db_connection=settings.BACKEND_DB_CONNECTION, |
117 | cc92b70f | Christos Stavrakakis | block_path=settings.BACKEND_BLOCK_PATH) |
118 | 7784ab88 | Christos Stavrakakis | |
119 | 7784ab88 | Christos Stavrakakis | |
120 | 7784ab88 | Christos Stavrakakis | def get_pithos_backend(): |
121 | 7784ab88 | Christos Stavrakakis | return _pithos_backend_pool.pool_get()
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122 | 7784ab88 | Christos Stavrakakis | |
123 | 7784ab88 | Christos Stavrakakis | |
124 | 2db7d9df | Christos Stavrakakis | def handle_backend_exceptions(func): |
125 | 2db7d9df | Christos Stavrakakis | @wraps(func)
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126 | 2db7d9df | Christos Stavrakakis | def wrapper(*args, **kwargs): |
127 | 2db7d9df | Christos Stavrakakis | try:
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128 | 2db7d9df | Christos Stavrakakis | return func(*args, **kwargs)
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129 | 2db7d9df | Christos Stavrakakis | except PithosNotAllowedError:
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130 | 2db7d9df | Christos Stavrakakis | raise NotAllowedError()
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131 | 2db7d9df | Christos Stavrakakis | return wrapper
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132 | 2db7d9df | Christos Stavrakakis | |
133 | 2db7d9df | Christos Stavrakakis | |
134 | ffab341c | Christos Stavrakakis | class ImageBackend(object): |
135 | f5afd99b | Giorgos Verigakis | """A wrapper arround the pithos backend to simplify image handling."""
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136 | 1e28ba40 | Christos Stavrakakis | |
137 | c34de90f | Giorgos Verigakis | def __init__(self, user): |
138 | c34de90f | Giorgos Verigakis | self.user = user
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139 | 7784ab88 | Christos Stavrakakis | |
140 | c23d211a | Giorgos Verigakis | original_filters = warnings.filters |
141 | c23d211a | Giorgos Verigakis | warnings.simplefilter('ignore') # Suppress SQLAlchemy warnings |
142 | 7784ab88 | Christos Stavrakakis | self.backend = get_pithos_backend()
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143 | c23d211a | Giorgos Verigakis | warnings.filters = original_filters # Restore warnings
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144 | 7784ab88 | Christos Stavrakakis | |
145 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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146 | 7bd1d3b5 | Giorgos Verigakis | def _get_image(self, location): |
147 | f5afd99b | Giorgos Verigakis | def format_timestamp(t): |
148 | f5afd99b | Giorgos Verigakis | return strftime('%Y-%m-%d %H:%M:%S', gmtime(t)) |
149 | 1e28ba40 | Christos Stavrakakis | |
150 | 7bd1d3b5 | Giorgos Verigakis | account, container, object = split_location(location) |
151 | 1e28ba40 | Christos Stavrakakis | |
152 | 7bd1d3b5 | Giorgos Verigakis | try:
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153 | 7bd1d3b5 | Giorgos Verigakis | versions = self.backend.list_versions(self.user, account, |
154 | cc92b70f | Christos Stavrakakis | container, object)
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155 | 7bd1d3b5 | Giorgos Verigakis | except NameError: |
156 | 7bd1d3b5 | Giorgos Verigakis | return None |
157 | 1e28ba40 | Christos Stavrakakis | |
158 | 7bd1d3b5 | Giorgos Verigakis | image = {} |
159 | 1e28ba40 | Christos Stavrakakis | |
160 | 7bd1d3b5 | Giorgos Verigakis | meta = self._get_meta(location)
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161 | 7bd1d3b5 | Giorgos Verigakis | if meta:
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162 | 7bd1d3b5 | Giorgos Verigakis | image['deleted_at'] = '' |
163 | 7bd1d3b5 | Giorgos Verigakis | else:
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164 | 7bd1d3b5 | Giorgos Verigakis | # Object was deleted, use the latest version
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165 | 7bd1d3b5 | Giorgos Verigakis | version, timestamp = versions[-1]
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166 | 7bd1d3b5 | Giorgos Verigakis | meta = self._get_meta(location, version)
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167 | 7bd1d3b5 | Giorgos Verigakis | image['deleted_at'] = format_timestamp(timestamp)
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168 | 1e28ba40 | Christos Stavrakakis | |
169 | 0a72907b | Giorgos Verigakis | if PLANKTON_PREFIX + 'name' not in meta: |
170 | 0a72907b | Giorgos Verigakis | return None # Not a Plankton image |
171 | 1e28ba40 | Christos Stavrakakis | |
172 | 7bd1d3b5 | Giorgos Verigakis | permissions = self._get_permissions(location)
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173 | 1e28ba40 | Christos Stavrakakis | |
174 | 0a72907b | Giorgos Verigakis | image['checksum'] = meta['hash'] |
175 | 7bd1d3b5 | Giorgos Verigakis | image['created_at'] = format_timestamp(versions[0][1]) |
176 | 0a72907b | Giorgos Verigakis | image['id'] = meta['uuid'] |
177 | f5afd99b | Giorgos Verigakis | image['is_public'] = '*' in permissions.get('read', []) |
178 | 7bd1d3b5 | Giorgos Verigakis | image['location'] = location
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179 | 469d0997 | Georgios D. Tsoukalas | if TRANSLATE_UUIDS:
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180 | 469d0997 | Georgios D. Tsoukalas | displaynames = get_displaynames([account]) |
181 | 469d0997 | Georgios D. Tsoukalas | if account in displaynames: |
182 | 469d0997 | Georgios D. Tsoukalas | display_account = displaynames[account] |
183 | 469d0997 | Georgios D. Tsoukalas | else:
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184 | 469d0997 | Georgios D. Tsoukalas | display_account = 'unknown'
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185 | 469d0997 | Georgios D. Tsoukalas | image['owner'] = display_account
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186 | 469d0997 | Georgios D. Tsoukalas | else:
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187 | 469d0997 | Georgios D. Tsoukalas | image['owner'] = account
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188 | 0a72907b | Giorgos Verigakis | image['size'] = meta['bytes'] |
189 | 7bd1d3b5 | Giorgos Verigakis | image['store'] = 'pithos' |
190 | 0a72907b | Giorgos Verigakis | image['updated_at'] = format_timestamp(meta['modified']) |
191 | 7bd1d3b5 | Giorgos Verigakis | image['properties'] = {}
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192 | 1e28ba40 | Christos Stavrakakis | |
193 | 7bd1d3b5 | Giorgos Verigakis | for key, val in meta.items(): |
194 | bfd9f988 | Giorgos Verigakis | if not key.startswith(PLANKTON_PREFIX): |
195 | bfd9f988 | Giorgos Verigakis | continue
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196 | bfd9f988 | Giorgos Verigakis | key = key[len(PLANKTON_PREFIX):]
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197 | bfd9f988 | Giorgos Verigakis | if key == 'properties': |
198 | bfd9f988 | Giorgos Verigakis | val = json.loads(val) |
199 | bfd9f988 | Giorgos Verigakis | if key in PLANKTON_META: |
200 | 7bd1d3b5 | Giorgos Verigakis | image[key] = val |
201 | 1e28ba40 | Christos Stavrakakis | |
202 | 0a72907b | Giorgos Verigakis | return image
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203 | 1e28ba40 | Christos Stavrakakis | |
204 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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205 | bfd9f988 | Giorgos Verigakis | def _get_meta(self, location, version=None): |
206 | 7bd1d3b5 | Giorgos Verigakis | account, container, object = split_location(location) |
207 | 7bd1d3b5 | Giorgos Verigakis | try:
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208 | bfd9f988 | Giorgos Verigakis | return self.backend.get_object_meta(self.user, account, container, |
209 | cc92b70f | Christos Stavrakakis | object, PLANKTON_DOMAIN,
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210 | cc92b70f | Christos Stavrakakis | version) |
211 | 7bd1d3b5 | Giorgos Verigakis | except NameError: |
212 | 7bd1d3b5 | Giorgos Verigakis | return None |
213 | 1e28ba40 | Christos Stavrakakis | |
214 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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215 | 7bd1d3b5 | Giorgos Verigakis | def _get_permissions(self, location): |
216 | 7bd1d3b5 | Giorgos Verigakis | account, container, object = split_location(location) |
217 | cc92b70f | Christos Stavrakakis | _a, _p, permissions = self.backend.get_object_permissions(self.user, |
218 | cc92b70f | Christos Stavrakakis | account, |
219 | cc92b70f | Christos Stavrakakis | container, |
220 | cc92b70f | Christos Stavrakakis | object)
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221 | f5afd99b | Giorgos Verigakis | return permissions
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222 | 1e28ba40 | Christos Stavrakakis | |
223 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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224 | c23d211a | Giorgos Verigakis | def _store(self, f, size=None): |
225 | 7bd1d3b5 | Giorgos Verigakis | """Breaks data into blocks and stores them in the backend"""
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226 | 1e28ba40 | Christos Stavrakakis | |
227 | c23d211a | Giorgos Verigakis | bytes = 0
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228 | f5afd99b | Giorgos Verigakis | hashmap = [] |
229 | 7bd1d3b5 | Giorgos Verigakis | backend = self.backend
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230 | c23d211a | Giorgos Verigakis | blocksize = backend.block_size |
231 | 1e28ba40 | Christos Stavrakakis | |
232 | c23d211a | Giorgos Verigakis | data = f.read(blocksize) |
233 | 7bd1d3b5 | Giorgos Verigakis | while data:
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234 | c23d211a | Giorgos Verigakis | hash = backend.put_block(data) |
235 | f5afd99b | Giorgos Verigakis | hashmap.append(hash)
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236 | c23d211a | Giorgos Verigakis | bytes += len(data) |
237 | c23d211a | Giorgos Verigakis | data = f.read(blocksize) |
238 | 1e28ba40 | Christos Stavrakakis | |
239 | c23d211a | Giorgos Verigakis | if size and size != bytes: |
240 | c23d211a | Giorgos Verigakis | raise BackendException("Invalid size") |
241 | 1e28ba40 | Christos Stavrakakis | |
242 | c23d211a | Giorgos Verigakis | return hashmap, bytes |
243 | 1e28ba40 | Christos Stavrakakis | |
244 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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245 | 7bd1d3b5 | Giorgos Verigakis | def _update(self, location, size, hashmap, meta, permissions): |
246 | 7bd1d3b5 | Giorgos Verigakis | account, container, object = split_location(location) |
247 | 7bd1d3b5 | Giorgos Verigakis | self.backend.update_object_hashmap(self.user, account, container, |
248 | cc92b70f | Christos Stavrakakis | object, size, hashmap, '', |
249 | cc92b70f | Christos Stavrakakis | PLANKTON_DOMAIN, |
250 | cc92b70f | Christos Stavrakakis | permissions=permissions) |
251 | 0a72907b | Giorgos Verigakis | self._update_meta(location, meta, replace=True) |
252 | 1e28ba40 | Christos Stavrakakis | |
253 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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254 | 0a72907b | Giorgos Verigakis | def _update_meta(self, location, meta, replace=False): |
255 | 7bd1d3b5 | Giorgos Verigakis | account, container, object = split_location(location) |
256 | 1e28ba40 | Christos Stavrakakis | |
257 | bfd9f988 | Giorgos Verigakis | prefixed = {} |
258 | 0a72907b | Giorgos Verigakis | for key, val in meta.items(): |
259 | bfd9f988 | Giorgos Verigakis | if key == 'properties': |
260 | bfd9f988 | Giorgos Verigakis | val = json.dumps(val) |
261 | bfd9f988 | Giorgos Verigakis | if key in PLANKTON_META: |
262 | bfd9f988 | Giorgos Verigakis | prefixed[PLANKTON_PREFIX + key] = val |
263 | 1e28ba40 | Christos Stavrakakis | |
264 | bfd9f988 | Giorgos Verigakis | self.backend.update_object_meta(self.user, account, container, object, |
265 | cc92b70f | Christos Stavrakakis | PLANKTON_DOMAIN, prefixed, replace) |
266 | 1e28ba40 | Christos Stavrakakis | |
267 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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268 | 7bd1d3b5 | Giorgos Verigakis | def _update_permissions(self, location, permissions): |
269 | 7bd1d3b5 | Giorgos Verigakis | account, container, object = split_location(location) |
270 | 7bd1d3b5 | Giorgos Verigakis | self.backend.update_object_permissions(self.user, account, container, |
271 | cc92b70f | Christos Stavrakakis | object, permissions)
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272 | 1e28ba40 | Christos Stavrakakis | |
273 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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274 | f5afd99b | Giorgos Verigakis | def add_user(self, image_id, user): |
275 | bfd9f988 | Giorgos Verigakis | image = self.get_image(image_id)
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276 | f5afd99b | Giorgos Verigakis | assert image, "Image not found" |
277 | 1e28ba40 | Christos Stavrakakis | |
278 | 7bd1d3b5 | Giorgos Verigakis | location = image['location']
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279 | 7bd1d3b5 | Giorgos Verigakis | permissions = self._get_permissions(location)
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280 | f5afd99b | Giorgos Verigakis | read = set(permissions.get('read', [])) |
281 | f5afd99b | Giorgos Verigakis | read.add(user) |
282 | f5afd99b | Giorgos Verigakis | permissions['read'] = list(read) |
283 | 7bd1d3b5 | Giorgos Verigakis | self._update_permissions(location, permissions)
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284 | 1e28ba40 | Christos Stavrakakis | |
285 | f5afd99b | Giorgos Verigakis | def close(self): |
286 | f5afd99b | Giorgos Verigakis | self.backend.close()
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287 | 1e28ba40 | Christos Stavrakakis | |
288 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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289 | 6ef51e9f | Giorgos Verigakis | def delete(self, image_id): |
290 | 6ef51e9f | Giorgos Verigakis | image = self.get_image(image_id)
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291 | 6ef51e9f | Giorgos Verigakis | account, container, object = split_location(image['location'])
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292 | 6ef51e9f | Giorgos Verigakis | self.backend.delete_object(self.user, account, container, object) |
293 | 1e28ba40 | Christos Stavrakakis | |
294 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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295 | 7bd1d3b5 | Giorgos Verigakis | def get_data(self, location): |
296 | 7bd1d3b5 | Giorgos Verigakis | account, container, object = split_location(location) |
297 | 7bd1d3b5 | Giorgos Verigakis | size, hashmap = self.backend.get_object_hashmap(self.user, account, |
298 | cc92b70f | Christos Stavrakakis | container, object)
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299 | f5afd99b | Giorgos Verigakis | data = ''.join(self.backend.get_block(hash) for hash in hashmap) |
300 | f5afd99b | Giorgos Verigakis | assert len(data) == size |
301 | f5afd99b | Giorgos Verigakis | return data
|
302 | 1e28ba40 | Christos Stavrakakis | |
303 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
|
304 | bfd9f988 | Giorgos Verigakis | def get_image(self, image_id): |
305 | 0a72907b | Giorgos Verigakis | try:
|
306 | 0a72907b | Giorgos Verigakis | account, container, object = self.backend.get_uuid(self.user, |
307 | cc92b70f | Christos Stavrakakis | image_id) |
308 | 0a72907b | Giorgos Verigakis | except NameError: |
309 | 0a72907b | Giorgos Verigakis | return None |
310 | 1e28ba40 | Christos Stavrakakis | |
311 | 0a72907b | Giorgos Verigakis | location = get_location(account, container, object)
|
312 | 0a72907b | Giorgos Verigakis | return self._get_image(location) |
313 | 1e28ba40 | Christos Stavrakakis | |
314 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
|
315 | aed77afe | Christos Stavrakakis | def _iter(self, public=False, filters=None, shared_from=None): |
316 | d19e8f77 | Giorgos Verigakis | filters = filters or {}
|
317 | 1e28ba40 | Christos Stavrakakis | |
318 | aed77afe | Christos Stavrakakis | # Fix keys
|
319 | bfd9f988 | Giorgos Verigakis | keys = [PLANKTON_PREFIX + 'name']
|
320 | 434d1e68 | Giorgos Verigakis | size_range = (None, None) |
321 | f5afd99b | Giorgos Verigakis | for key, val in filters.items(): |
322 | 0a72907b | Giorgos Verigakis | if key == 'size_min': |
323 | c3bcaeff | Stratos Psomadakis | size_range = (val, size_range[1])
|
324 | 0a72907b | Giorgos Verigakis | elif key == 'size_max': |
325 | c3bcaeff | Stratos Psomadakis | size_range = (size_range[0], val)
|
326 | f5afd99b | Giorgos Verigakis | else:
|
327 | 434d1e68 | Giorgos Verigakis | keys.append('%s = %s' % (PLANKTON_PREFIX + key, val))
|
328 | 1e28ba40 | Christos Stavrakakis | |
329 | aed77afe | Christos Stavrakakis | backend = self.backend
|
330 | aed77afe | Christos Stavrakakis | if shared_from:
|
331 | aed77afe | Christos Stavrakakis | # To get shared images, we connect as shared_from member and
|
332 | aed77afe | Christos Stavrakakis | # get the list shared by us
|
333 | aed77afe | Christos Stavrakakis | user = shared_from |
334 | aed77afe | Christos Stavrakakis | else:
|
335 | aed77afe | Christos Stavrakakis | user = None if public else self.user |
336 | aed77afe | Christos Stavrakakis | accounts = backend.list_accounts(user) |
337 | aed77afe | Christos Stavrakakis | |
338 | aed77afe | Christos Stavrakakis | for account in accounts: |
339 | aed77afe | Christos Stavrakakis | for container in backend.list_containers(user, account, |
340 | 0a72907b | Giorgos Verigakis | shared=True):
|
341 | aed77afe | Christos Stavrakakis | for path, _ in backend.list_objects(user, account, container, |
342 | aed77afe | Christos Stavrakakis | domain=PLANKTON_DOMAIN, |
343 | aed77afe | Christos Stavrakakis | keys=keys, shared=True,
|
344 | aed77afe | Christos Stavrakakis | size_range=size_range): |
345 | 0a72907b | Giorgos Verigakis | location = get_location(account, container, path) |
346 | 0a72907b | Giorgos Verigakis | image = self._get_image(location)
|
347 | 0a72907b | Giorgos Verigakis | if image:
|
348 | 0a72907b | Giorgos Verigakis | yield image
|
349 | 1e28ba40 | Christos Stavrakakis | |
350 | aed77afe | Christos Stavrakakis | def iter(self, filters=None): |
351 | aed77afe | Christos Stavrakakis | """Iter over all images available to the user"""
|
352 | aed77afe | Christos Stavrakakis | return self._iter(filters=filters) |
353 | 1e28ba40 | Christos Stavrakakis | |
354 | aed77afe | Christos Stavrakakis | def iter_public(self, filters=None): |
355 | aed77afe | Christos Stavrakakis | """Iter over public images"""
|
356 | aed77afe | Christos Stavrakakis | return self._iter(public=True, filters=filters) |
357 | 1e28ba40 | Christos Stavrakakis | |
358 | aed77afe | Christos Stavrakakis | def iter_shared(self, filters=None, member=None): |
359 | aed77afe | Christos Stavrakakis | """Iter over images shared to member"""
|
360 | d0e8984d | Christos Stavrakakis | return self._iter(filters=filters, shared_from=member) |
361 | 1e28ba40 | Christos Stavrakakis | |
362 | aed77afe | Christos Stavrakakis | def list(self, filters=None, params={}): |
363 | aed77afe | Christos Stavrakakis | """Return all images available to the user"""
|
364 | aed77afe | Christos Stavrakakis | images = list(self.iter(filters)) |
365 | aed77afe | Christos Stavrakakis | key = itemgetter(params.get('sort_key', 'created_at')) |
366 | aed77afe | Christos Stavrakakis | reverse = params.get('sort_dir', 'desc') == 'desc' |
367 | aed77afe | Christos Stavrakakis | images.sort(key=key, reverse=reverse) |
368 | aed77afe | Christos Stavrakakis | return images
|
369 | 1e28ba40 | Christos Stavrakakis | |
370 | aed77afe | Christos Stavrakakis | def list_public(self, filters, params={}): |
371 | aed77afe | Christos Stavrakakis | """Return public images"""
|
372 | f5afd99b | Giorgos Verigakis | images = list(self.iter_public(filters)) |
373 | 7bd1d3b5 | Giorgos Verigakis | key = itemgetter(params.get('sort_key', 'created_at')) |
374 | 7bd1d3b5 | Giorgos Verigakis | reverse = params.get('sort_dir', 'desc') == 'desc' |
375 | f5afd99b | Giorgos Verigakis | images.sort(key=key, reverse=reverse) |
376 | f5afd99b | Giorgos Verigakis | return images
|
377 | 1e28ba40 | Christos Stavrakakis | |
378 | f5afd99b | Giorgos Verigakis | def list_users(self, image_id): |
379 | bfd9f988 | Giorgos Verigakis | image = self.get_image(image_id)
|
380 | f5afd99b | Giorgos Verigakis | assert image, "Image not found" |
381 | 1e28ba40 | Christos Stavrakakis | |
382 | 7bd1d3b5 | Giorgos Verigakis | permissions = self._get_permissions(image['location']) |
383 | f5afd99b | Giorgos Verigakis | return [user for user in permissions.get('read', []) if user != '*'] |
384 | 1e28ba40 | Christos Stavrakakis | |
385 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
|
386 | c23d211a | Giorgos Verigakis | def put(self, name, f, params): |
387 | 7bd1d3b5 | Giorgos Verigakis | assert 'checksum' not in params, "Passing a checksum is not supported" |
388 | 7bd1d3b5 | Giorgos Verigakis | assert 'id' not in params, "Passing an ID is not supported" |
389 | 7bd1d3b5 | Giorgos Verigakis | assert params.pop('store', 'pithos') == 'pithos', "Invalid store" |
390 | cc92b70f | Christos Stavrakakis | disk_format = params.setdefault('disk_format',
|
391 | cc92b70f | Christos Stavrakakis | settings.DEFAULT_DISK_FORMAT) |
392 | cc92b70f | Christos Stavrakakis | assert disk_format in settings.ALLOWED_DISK_FORMATS,\ |
393 | cc92b70f | Christos Stavrakakis | "Invalid disk_format"
|
394 | 7bd1d3b5 | Giorgos Verigakis | assert params.setdefault('container_format', |
395 | 7bd1d3b5 | Giorgos Verigakis | settings.DEFAULT_CONTAINER_FORMAT) in \
|
396 | 7bd1d3b5 | Giorgos Verigakis | settings.ALLOWED_CONTAINER_FORMATS, "Invalid container_format"
|
397 | 1e28ba40 | Christos Stavrakakis | |
398 | bfd9f988 | Giorgos Verigakis | container = settings.DEFAULT_PLANKTON_CONTAINER |
399 | c23d211a | Giorgos Verigakis | filename = params.pop('filename', name)
|
400 | bfd9f988 | Giorgos Verigakis | location = 'pithos://%s/%s/%s' % (self.user, container, filename) |
401 | f5afd99b | Giorgos Verigakis | is_public = params.pop('is_public', False) |
402 | 921355f8 | Giorgos Verigakis | permissions = {'read': ['*']} if is_public else {} |
403 | c23d211a | Giorgos Verigakis | size = params.pop('size', None) |
404 | 1e28ba40 | Christos Stavrakakis | |
405 | c23d211a | Giorgos Verigakis | hashmap, size = self._store(f, size)
|
406 | 1e28ba40 | Christos Stavrakakis | |
407 | 7bd1d3b5 | Giorgos Verigakis | meta = {} |
408 | 7bd1d3b5 | Giorgos Verigakis | meta['properties'] = params.pop('properties', {}) |
409 | 0a72907b | Giorgos Verigakis | meta.update(name=name, status='available', **params)
|
410 | 1e28ba40 | Christos Stavrakakis | |
411 | 7bd1d3b5 | Giorgos Verigakis | self._update(location, size, hashmap, meta, permissions)
|
412 | 0a72907b | Giorgos Verigakis | return self._get_image(location) |
413 | 1e28ba40 | Christos Stavrakakis | |
414 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
|
415 | f5afd99b | Giorgos Verigakis | def register(self, name, location, params): |
416 | 7bd1d3b5 | Giorgos Verigakis | assert 'id' not in params, "Passing an ID is not supported" |
417 | 7bd1d3b5 | Giorgos Verigakis | assert location.startswith('pithos://'), "Invalid location" |
418 | 7bd1d3b5 | Giorgos Verigakis | assert params.pop('store', 'pithos') == 'pithos', "Invalid store" |
419 | 7bd1d3b5 | Giorgos Verigakis | assert params.setdefault('disk_format', |
420 | 7bd1d3b5 | Giorgos Verigakis | settings.DEFAULT_DISK_FORMAT) in \
|
421 | 7bd1d3b5 | Giorgos Verigakis | settings.ALLOWED_DISK_FORMATS, "Invalid disk_format"
|
422 | 7bd1d3b5 | Giorgos Verigakis | assert params.setdefault('container_format', |
423 | 7bd1d3b5 | Giorgos Verigakis | settings.DEFAULT_CONTAINER_FORMAT) in \
|
424 | 7bd1d3b5 | Giorgos Verigakis | settings.ALLOWED_CONTAINER_FORMATS, "Invalid container_format"
|
425 | 1e28ba40 | Christos Stavrakakis | |
426 | 1e28ba40 | Christos Stavrakakis | # user = self.user
|
427 | 7bd1d3b5 | Giorgos Verigakis | account, container, object = split_location(location) |
428 | 1e28ba40 | Christos Stavrakakis | |
429 | 7bd1d3b5 | Giorgos Verigakis | meta = self._get_meta(location)
|
430 | 06c8fb11 | Giorgos Verigakis | assert meta, "File not found" |
431 | 1e28ba40 | Christos Stavrakakis | |
432 | bfd9f988 | Giorgos Verigakis | size = int(params.pop('size', meta['bytes'])) |
433 | 0a72907b | Giorgos Verigakis | if size != meta['bytes']: |
434 | c34de90f | Giorgos Verigakis | raise BackendException("Invalid size") |
435 | 1e28ba40 | Christos Stavrakakis | |
436 | 0a72907b | Giorgos Verigakis | checksum = params.pop('checksum', meta['hash']) |
437 | 0a72907b | Giorgos Verigakis | if checksum != meta['hash']: |
438 | c34de90f | Giorgos Verigakis | raise BackendException("Invalid checksum") |
439 | 1e28ba40 | Christos Stavrakakis | |
440 | f5afd99b | Giorgos Verigakis | is_public = params.pop('is_public', False) |
441 | aed77afe | Christos Stavrakakis | if is_public:
|
442 | aed77afe | Christos Stavrakakis | permissions = {'read': ['*']} |
443 | aed77afe | Christos Stavrakakis | else:
|
444 | aed77afe | Christos Stavrakakis | permissions = {'read': [self.user]} |
445 | 1e28ba40 | Christos Stavrakakis | |
446 | f5afd99b | Giorgos Verigakis | meta = {} |
447 | 7bd1d3b5 | Giorgos Verigakis | meta['properties'] = params.pop('properties', {}) |
448 | 0a72907b | Giorgos Verigakis | meta.update(name=name, status='available', **params)
|
449 | 1e28ba40 | Christos Stavrakakis | |
450 | 7bd1d3b5 | Giorgos Verigakis | self._update_meta(location, meta)
|
451 | 7bd1d3b5 | Giorgos Verigakis | self._update_permissions(location, permissions)
|
452 | 0a72907b | Giorgos Verigakis | return self._get_image(location) |
453 | 1e28ba40 | Christos Stavrakakis | |
454 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
|
455 | f5afd99b | Giorgos Verigakis | def remove_user(self, image_id, user): |
456 | bfd9f988 | Giorgos Verigakis | image = self.get_image(image_id)
|
457 | f5afd99b | Giorgos Verigakis | assert image, "Image not found" |
458 | 1e28ba40 | Christos Stavrakakis | |
459 | 7bd1d3b5 | Giorgos Verigakis | location = image['location']
|
460 | 7bd1d3b5 | Giorgos Verigakis | permissions = self._get_permissions(location)
|
461 | f5afd99b | Giorgos Verigakis | try:
|
462 | f5afd99b | Giorgos Verigakis | permissions.get('read', []).remove(user)
|
463 | f5afd99b | Giorgos Verigakis | except ValueError: |
464 | f5afd99b | Giorgos Verigakis | return # User did not have access anyway |
465 | 7bd1d3b5 | Giorgos Verigakis | self._update_permissions(location, permissions)
|
466 | 1e28ba40 | Christos Stavrakakis | |
467 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
|
468 | f5afd99b | Giorgos Verigakis | def replace_users(self, image_id, users): |
469 | bfd9f988 | Giorgos Verigakis | image = self.get_image(image_id)
|
470 | f5afd99b | Giorgos Verigakis | assert image, "Image not found" |
471 | 1e28ba40 | Christos Stavrakakis | |
472 | 7bd1d3b5 | Giorgos Verigakis | location = image['location']
|
473 | 7bd1d3b5 | Giorgos Verigakis | permissions = self._get_permissions(location)
|
474 | f5afd99b | Giorgos Verigakis | permissions['read'] = users
|
475 | f5afd99b | Giorgos Verigakis | if image.get('is_public', False): |
476 | f5afd99b | Giorgos Verigakis | permissions['read'].append('*') |
477 | 7bd1d3b5 | Giorgos Verigakis | self._update_permissions(location, permissions)
|
478 | 1e28ba40 | Christos Stavrakakis | |
479 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
|
480 | 7bd1d3b5 | Giorgos Verigakis | def update(self, image_id, params): |
481 | bfd9f988 | Giorgos Verigakis | image = self.get_image(image_id)
|
482 | 15137c54 | Giorgos Verigakis | assert image, "Image not found" |
483 | 1e28ba40 | Christos Stavrakakis | |
484 | 7bd1d3b5 | Giorgos Verigakis | location = image['location']
|
485 | 7bd1d3b5 | Giorgos Verigakis | is_public = params.pop('is_public', None) |
486 | 7e00b33e | Giorgos Verigakis | if is_public is not None: |
487 | 7bd1d3b5 | Giorgos Verigakis | permissions = self._get_permissions(location)
|
488 | f5afd99b | Giorgos Verigakis | read = set(permissions.get('read', [])) |
489 | 7e00b33e | Giorgos Verigakis | if is_public:
|
490 | f5afd99b | Giorgos Verigakis | read.add('*')
|
491 | 7e00b33e | Giorgos Verigakis | else:
|
492 | f5afd99b | Giorgos Verigakis | read.discard('*')
|
493 | f5afd99b | Giorgos Verigakis | permissions['read'] = list(read) |
494 | 7bd1d3b5 | Giorgos Verigakis | self.backend._update_permissions(location, permissions)
|
495 | 1e28ba40 | Christos Stavrakakis | |
496 | 7bd1d3b5 | Giorgos Verigakis | meta = {} |
497 | 7bd1d3b5 | Giorgos Verigakis | meta['properties'] = params.pop('properties', {}) |
498 | 7bd1d3b5 | Giorgos Verigakis | meta.update(**params) |
499 | 1e28ba40 | Christos Stavrakakis | |
500 | 7bd1d3b5 | Giorgos Verigakis | self._update_meta(location, meta)
|
501 | bfd9f988 | Giorgos Verigakis | return self.get_image(image_id) |