root / snf-cyclades-app / synnefo / plankton / backend.py @ 62d3ea53
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1 | cda71050 | Christos Stavrakakis | # Copyright 2011-2013 GRNET S.A. All rights reserved.
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2 | cda71050 | Christos Stavrakakis | |
3 | c34de90f | Giorgos Verigakis | #
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4 | c34de90f | Giorgos Verigakis | # Redistribution and use in source and binary forms, with or
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5 | c34de90f | Giorgos Verigakis | # without modification, are permitted provided that the following
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6 | c34de90f | Giorgos Verigakis | # conditions are met:
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7 | c34de90f | Giorgos Verigakis | #
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8 | c34de90f | Giorgos Verigakis | # 1. Redistributions of source code must retain the above
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9 | c34de90f | Giorgos Verigakis | # copyright notice, this list of conditions and the following
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10 | c34de90f | Giorgos Verigakis | # disclaimer.
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11 | c34de90f | Giorgos Verigakis | #
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12 | c34de90f | Giorgos Verigakis | # 2. Redistributions in binary form must reproduce the above
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13 | c34de90f | Giorgos Verigakis | # copyright notice, this list of conditions and the following
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14 | c34de90f | Giorgos Verigakis | # disclaimer in the documentation and/or other materials
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15 | c34de90f | Giorgos Verigakis | # provided with the distribution.
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16 | c34de90f | Giorgos Verigakis | #
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17 | c34de90f | Giorgos Verigakis | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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18 | c34de90f | Giorgos Verigakis | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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19 | c34de90f | Giorgos Verigakis | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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20 | c34de90f | Giorgos Verigakis | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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21 | c34de90f | Giorgos Verigakis | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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22 | c34de90f | Giorgos Verigakis | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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23 | c34de90f | Giorgos Verigakis | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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24 | c34de90f | Giorgos Verigakis | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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25 | c34de90f | Giorgos Verigakis | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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26 | c34de90f | Giorgos Verigakis | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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27 | c34de90f | Giorgos Verigakis | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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28 | c34de90f | Giorgos Verigakis | # POSSIBILITY OF SUCH DAMAGE.
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29 | c34de90f | Giorgos Verigakis | #
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30 | c34de90f | Giorgos Verigakis | # The views and conclusions contained in the software and
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31 | c34de90f | Giorgos Verigakis | # documentation are those of the authors and should not be
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32 | c34de90f | Giorgos Verigakis | # interpreted as representing official policies, either expressed
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33 | c34de90f | Giorgos Verigakis | # or implied, of GRNET S.A.
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34 | c34de90f | Giorgos Verigakis | |
35 | f5afd99b | Giorgos Verigakis | """
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36 | bfd9f988 | Giorgos Verigakis | The Plankton attributes are the following:
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37 | 0a72907b | Giorgos Verigakis | - checksum: the 'hash' meta
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38 | 7bd1d3b5 | Giorgos Verigakis | - container_format: stored as a user meta
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39 | 0a72907b | Giorgos Verigakis | - created_at: the 'modified' meta of the first version
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40 | 0a72907b | Giorgos Verigakis | - deleted_at: the timestamp of the last version
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41 | 7bd1d3b5 | Giorgos Verigakis | - disk_format: stored as a user meta
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42 | 0a72907b | Giorgos Verigakis | - id: the 'uuid' meta
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43 | f5afd99b | Giorgos Verigakis | - is_public: True if there is a * entry for the read permission
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44 | 0a72907b | Giorgos Verigakis | - location: generated based on the file's path
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45 | 7bd1d3b5 | Giorgos Verigakis | - name: stored as a user meta
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46 | 0a72907b | Giorgos Verigakis | - owner: the file's account
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47 | 7bd1d3b5 | Giorgos Verigakis | - properties: stored as user meta prefixed with PROPERTY_PREFIX
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48 | 0a72907b | Giorgos Verigakis | - size: the 'bytes' meta
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49 | 7bd1d3b5 | Giorgos Verigakis | - status: stored as a system meta
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50 | 7bd1d3b5 | Giorgos Verigakis | - store: is always 'pithos'
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51 | 0a72907b | Giorgos Verigakis | - updated_at: the 'modified' meta
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52 | f5afd99b | Giorgos Verigakis | """
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53 | f5afd99b | Giorgos Verigakis | |
54 | c34de90f | Giorgos Verigakis | import json |
55 | c23d211a | Giorgos Verigakis | import warnings |
56 | cda71050 | Christos Stavrakakis | import logging |
57 | 2db7d9df | Christos Stavrakakis | from time import gmtime, strftime |
58 | cda71050 | Christos Stavrakakis | from functools import wraps |
59 | cda71050 | Christos Stavrakakis | from operator import itemgetter |
60 | c34de90f | Giorgos Verigakis | |
61 | cda71050 | Christos Stavrakakis | from django.conf import settings |
62 | cda71050 | Christos Stavrakakis | from pithos.backends.base import NotAllowedError, VersionNotExists |
63 | f4366b6c | Stratos Psomadakis | |
64 | 469d0997 | Georgios D. Tsoukalas | logger = logging.getLogger(__name__) |
65 | c34de90f | Giorgos Verigakis | |
66 | c34de90f | Giorgos Verigakis | |
67 | 0a72907b | Giorgos Verigakis | PLANKTON_DOMAIN = 'plankton'
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68 | bfd9f988 | Giorgos Verigakis | PLANKTON_PREFIX = 'plankton:'
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69 | 7bd1d3b5 | Giorgos Verigakis | PROPERTY_PREFIX = 'property:'
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70 | 7bd1d3b5 | Giorgos Verigakis | |
71 | bfd9f988 | Giorgos Verigakis | PLANKTON_META = ('container_format', 'disk_format', 'name', 'properties', |
72 | bfd9f988 | Giorgos Verigakis | 'status')
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73 | c34de90f | Giorgos Verigakis | |
74 | 7784ab88 | Christos Stavrakakis | from pithos.backends.util import PithosBackendPool |
75 | 7784ab88 | Christos Stavrakakis | POOL_SIZE = 8
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76 | 7784ab88 | Christos Stavrakakis | _pithos_backend_pool = \ |
77 | b336e6fa | Georgios D. Tsoukalas | PithosBackendPool( |
78 | b336e6fa | Georgios D. Tsoukalas | POOL_SIZE, |
79 | cda71050 | Christos Stavrakakis | quotaholder_enabled=settings.CYCLADES_USE_QUOTAHOLDER, |
80 | cda71050 | Christos Stavrakakis | quotaholder_url=settings.CYCLADES_QUOTAHOLDER_URL, |
81 | cda71050 | Christos Stavrakakis | quotaholder_token=settings.CYCLADES_QUOTAHOLDER_TOKEN, |
82 | cda71050 | Christos Stavrakakis | quotaholder_client_poolsize=settings.CYCLADES_QUOTAHOLDER_POOLSIZE, |
83 | b336e6fa | Georgios D. Tsoukalas | db_connection=settings.BACKEND_DB_CONNECTION, |
84 | b336e6fa | Georgios D. Tsoukalas | block_path=settings.BACKEND_BLOCK_PATH) |
85 | 7784ab88 | Christos Stavrakakis | |
86 | 7784ab88 | Christos Stavrakakis | |
87 | 7784ab88 | Christos Stavrakakis | def get_pithos_backend(): |
88 | 7784ab88 | Christos Stavrakakis | return _pithos_backend_pool.pool_get()
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89 | 7784ab88 | Christos Stavrakakis | |
90 | 7784ab88 | Christos Stavrakakis | |
91 | cda71050 | Christos Stavrakakis | def create_url(account, container, name): |
92 | cda71050 | Christos Stavrakakis | assert "/" not in account, "Invalid account" |
93 | cda71050 | Christos Stavrakakis | assert "/" not in container, "Invalid container" |
94 | cda71050 | Christos Stavrakakis | return "pithos://%s/%s/%s" % (account, container, name) |
95 | cda71050 | Christos Stavrakakis | |
96 | cda71050 | Christos Stavrakakis | |
97 | cda71050 | Christos Stavrakakis | def split_url(url): |
98 | cda71050 | Christos Stavrakakis | """Returns (accout, container, object) from a url string"""
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99 | cda71050 | Christos Stavrakakis | t = url.split('/', 4) |
100 | 59573532 | Christos Stavrakakis | assert t[0] == "pithos:", "Invalid url" |
101 | cda71050 | Christos Stavrakakis | assert len(t) == 5, "Invalid url" |
102 | cda71050 | Christos Stavrakakis | return t[2:5] |
103 | cda71050 | Christos Stavrakakis | |
104 | cda71050 | Christos Stavrakakis | |
105 | cda71050 | Christos Stavrakakis | def format_timestamp(t): |
106 | cda71050 | Christos Stavrakakis | return strftime('%Y-%m-%d %H:%M:%S', gmtime(t)) |
107 | cda71050 | Christos Stavrakakis | |
108 | cda71050 | Christos Stavrakakis | |
109 | 2db7d9df | Christos Stavrakakis | def handle_backend_exceptions(func): |
110 | 2db7d9df | Christos Stavrakakis | @wraps(func)
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111 | 2db7d9df | Christos Stavrakakis | def wrapper(*args, **kwargs): |
112 | 2db7d9df | Christos Stavrakakis | try:
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113 | 2db7d9df | Christos Stavrakakis | return func(*args, **kwargs)
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114 | f6ff4b40 | Christos Stavrakakis | except NotAllowedError:
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115 | cda71050 | Christos Stavrakakis | raise Forbidden
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116 | cda71050 | Christos Stavrakakis | except NameError: |
117 | cda71050 | Christos Stavrakakis | raise ImageNotFound
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118 | cda71050 | Christos Stavrakakis | except VersionNotExists:
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119 | cda71050 | Christos Stavrakakis | raise ImageNotFound
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120 | 2db7d9df | Christos Stavrakakis | return wrapper
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121 | 2db7d9df | Christos Stavrakakis | |
122 | 2db7d9df | Christos Stavrakakis | |
123 | ffab341c | Christos Stavrakakis | class ImageBackend(object): |
124 | f5afd99b | Giorgos Verigakis | """A wrapper arround the pithos backend to simplify image handling."""
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125 | 1e28ba40 | Christos Stavrakakis | |
126 | c34de90f | Giorgos Verigakis | def __init__(self, user): |
127 | c34de90f | Giorgos Verigakis | self.user = user
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128 | 7784ab88 | Christos Stavrakakis | |
129 | c23d211a | Giorgos Verigakis | original_filters = warnings.filters |
130 | c23d211a | Giorgos Verigakis | warnings.simplefilter('ignore') # Suppress SQLAlchemy warnings |
131 | 7784ab88 | Christos Stavrakakis | self.backend = get_pithos_backend()
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132 | c23d211a | Giorgos Verigakis | warnings.filters = original_filters # Restore warnings
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133 | 7784ab88 | Christos Stavrakakis | |
134 | cda71050 | Christos Stavrakakis | def close(self): |
135 | cda71050 | Christos Stavrakakis | """Close PithosBackend(return to pool)"""
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136 | cda71050 | Christos Stavrakakis | self.backend.close()
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137 | cda71050 | Christos Stavrakakis | |
138 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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139 | cda71050 | Christos Stavrakakis | def get_image(self, image_uuid): |
140 | cda71050 | Christos Stavrakakis | """Retrieve information about an image."""
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141 | cda71050 | Christos Stavrakakis | image_url = self._get_image_url(image_uuid)
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142 | cda71050 | Christos Stavrakakis | return self._get_image(image_url) |
143 | 1e28ba40 | Christos Stavrakakis | |
144 | cda71050 | Christos Stavrakakis | def _get_image_url(self, image_uuid): |
145 | cda71050 | Christos Stavrakakis | """Get the Pithos url that corresponds to an image UUID."""
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146 | cda71050 | Christos Stavrakakis | account, container, name = self.backend.get_uuid(self.user, image_uuid) |
147 | cda71050 | Christos Stavrakakis | return create_url(account, container, name)
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148 | 1e28ba40 | Christos Stavrakakis | |
149 | cda71050 | Christos Stavrakakis | def _get_image(self, image_url): |
150 | cda71050 | Christos Stavrakakis | """Get information about an Image.
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151 | cda71050 | Christos Stavrakakis |
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152 | cda71050 | Christos Stavrakakis | Get all available information about an Image.
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153 | cda71050 | Christos Stavrakakis | """
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154 | cda71050 | Christos Stavrakakis | account, container, name = split_url(image_url) |
155 | cda71050 | Christos Stavrakakis | versions = self.backend.list_versions(self.user, account, container, |
156 | cda71050 | Christos Stavrakakis | name) |
157 | cda71050 | Christos Stavrakakis | if not versions: |
158 | cda71050 | Christos Stavrakakis | raise Exception("Image without versions %s" % image_url) |
159 | cda71050 | Christos Stavrakakis | try:
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160 | cda71050 | Christos Stavrakakis | meta = self._get_meta(image_url)
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161 | 14c94c48 | Christos Stavrakakis | meta["deleted"] = "" |
162 | cda71050 | Christos Stavrakakis | except NameError: |
163 | 7bd1d3b5 | Giorgos Verigakis | # Object was deleted, use the latest version
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164 | 7bd1d3b5 | Giorgos Verigakis | version, timestamp = versions[-1]
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165 | cda71050 | Christos Stavrakakis | meta = self._get_meta(image_url, version)
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166 | 14c94c48 | Christos Stavrakakis | meta["deleted"] = timestamp
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167 | 14c94c48 | Christos Stavrakakis | |
168 | 14c94c48 | Christos Stavrakakis | meta["created"] = versions[0][1] |
169 | 1e28ba40 | Christos Stavrakakis | |
170 | 0a72907b | Giorgos Verigakis | if PLANKTON_PREFIX + 'name' not in meta: |
171 | cda71050 | Christos Stavrakakis | raise ImageNotFound("'%s' is not a Plankton image" % image_url) |
172 | 1e28ba40 | Christos Stavrakakis | |
173 | cda71050 | Christos Stavrakakis | permissions = self._get_permissions(image_url)
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174 | 14c94c48 | Christos Stavrakakis | return image_to_dict(image_url, meta, permissions)
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175 | 1e28ba40 | Christos Stavrakakis | |
176 | cda71050 | Christos Stavrakakis | def _get_meta(self, image_url, version=None): |
177 | cda71050 | Christos Stavrakakis | """Get object's metadata."""
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178 | cda71050 | Christos Stavrakakis | account, container, name = split_url(image_url) |
179 | cda71050 | Christos Stavrakakis | return self.backend.get_object_meta(self.user, account, container, |
180 | cda71050 | Christos Stavrakakis | name, PLANKTON_DOMAIN, version) |
181 | 1e28ba40 | Christos Stavrakakis | |
182 | cda71050 | Christos Stavrakakis | def _update_meta(self, image_url, meta, replace=False): |
183 | cda71050 | Christos Stavrakakis | """Update object's metadata."""
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184 | cda71050 | Christos Stavrakakis | account, container, name = split_url(image_url) |
185 | 1e28ba40 | Christos Stavrakakis | |
186 | cda71050 | Christos Stavrakakis | prefixed = {} |
187 | cda71050 | Christos Stavrakakis | for key, val in meta.items(): |
188 | cda71050 | Christos Stavrakakis | if key in PLANKTON_META: |
189 | cda71050 | Christos Stavrakakis | if key == "properties": |
190 | cda71050 | Christos Stavrakakis | val = json.dumps(val) |
191 | cda71050 | Christos Stavrakakis | prefixed[PLANKTON_PREFIX + key] = val |
192 | 1e28ba40 | Christos Stavrakakis | |
193 | cda71050 | Christos Stavrakakis | self.backend.update_object_meta(self.user, account, container, name, |
194 | cda71050 | Christos Stavrakakis | PLANKTON_DOMAIN, prefixed, replace) |
195 | 62d3ea53 | Christos Stavrakakis | logger.debug("User '%s' updated image '%s', meta: '%s'", self.user, |
196 | 62d3ea53 | Christos Stavrakakis | image_url, prefixed) |
197 | 1e28ba40 | Christos Stavrakakis | |
198 | cda71050 | Christos Stavrakakis | def _get_permissions(self, image_url): |
199 | cda71050 | Christos Stavrakakis | """Get object's permissions."""
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200 | cda71050 | Christos Stavrakakis | account, container, name = split_url(image_url) |
201 | cda71050 | Christos Stavrakakis | _a, path, permissions = \ |
202 | cda71050 | Christos Stavrakakis | self.backend.get_object_permissions(self.user, account, container, |
203 | cda71050 | Christos Stavrakakis | name) |
204 | 1e28ba40 | Christos Stavrakakis | |
205 | cda71050 | Christos Stavrakakis | if path is None: |
206 | cda71050 | Christos Stavrakakis | logger.warning("Image '%s' got permissions from None path",
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207 | cda71050 | Christos Stavrakakis | image_url) |
208 | 1e28ba40 | Christos Stavrakakis | |
209 | cda71050 | Christos Stavrakakis | return permissions
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210 | 1e28ba40 | Christos Stavrakakis | |
211 | cda71050 | Christos Stavrakakis | def _update_permissions(self, image_url, permissions): |
212 | cda71050 | Christos Stavrakakis | """Update object's permissions."""
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213 | cda71050 | Christos Stavrakakis | account, container, name = split_url(image_url) |
214 | cda71050 | Christos Stavrakakis | self.backend.update_object_permissions(self.user, account, container, |
215 | cda71050 | Christos Stavrakakis | name, permissions) |
216 | 62d3ea53 | Christos Stavrakakis | logger.debug("User '%s' updated image '%s', permissions: '%s'",
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217 | 62d3ea53 | Christos Stavrakakis | self.user, image_url, permissions)
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218 | 1e28ba40 | Christos Stavrakakis | |
219 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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220 | cda71050 | Christos Stavrakakis | def unregister(self, image_uuid): |
221 | cda71050 | Christos Stavrakakis | """Unregister an image.
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222 | 1e28ba40 | Christos Stavrakakis |
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223 | cda71050 | Christos Stavrakakis | Unregister an image, by removing all metadata from the Pithos
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224 | cda71050 | Christos Stavrakakis | file that exist in the PLANKTON_DOMAIN.
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225 | 1e28ba40 | Christos Stavrakakis |
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226 | cda71050 | Christos Stavrakakis | """
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227 | cda71050 | Christos Stavrakakis | image_url = self._get_image_url(image_uuid)
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228 | cda71050 | Christos Stavrakakis | self._get_image(image_url) # Assert that it is an image |
229 | cda71050 | Christos Stavrakakis | # Unregister the image by removing all metadata from domain
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230 | cda71050 | Christos Stavrakakis | # 'PLANKTON_DOMAIN'
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231 | 22b5ac0b | Christos Stavrakakis | meta = {} |
232 | 22b5ac0b | Christos Stavrakakis | self._update_meta(image_url, meta, True) |
233 | 62d3ea53 | Christos Stavrakakis | logger.debug("User '%s' deleted image '%s'", self.user, image_url) |
234 | 1e28ba40 | Christos Stavrakakis | |
235 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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236 | cda71050 | Christos Stavrakakis | def add_user(self, image_uuid, add_user): |
237 | cda71050 | Christos Stavrakakis | """Add a user as an image member.
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238 | cda71050 | Christos Stavrakakis |
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239 | cda71050 | Christos Stavrakakis | Update read permissions of Pithos file, to include the specified user.
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240 | cda71050 | Christos Stavrakakis |
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241 | cda71050 | Christos Stavrakakis | """
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242 | cda71050 | Christos Stavrakakis | image_url = self._get_image_url(image_uuid)
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243 | cda71050 | Christos Stavrakakis | self._get_image(image_url) # Assert that it is an image |
244 | cda71050 | Christos Stavrakakis | permissions = self._get_permissions(image_url)
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245 | cda71050 | Christos Stavrakakis | read = set(permissions.get("read", [])) |
246 | cda71050 | Christos Stavrakakis | assert(isinstance(add_user, (str, unicode))) |
247 | cda71050 | Christos Stavrakakis | read.add(add_user) |
248 | cda71050 | Christos Stavrakakis | permissions["read"] = list(read) |
249 | cda71050 | Christos Stavrakakis | self._update_permissions(image_url, permissions)
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250 | 1e28ba40 | Christos Stavrakakis | |
251 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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252 | cda71050 | Christos Stavrakakis | def remove_user(self, image_uuid, remove_user): |
253 | cda71050 | Christos Stavrakakis | """Remove the user from image members.
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254 | 1e28ba40 | Christos Stavrakakis |
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255 | cda71050 | Christos Stavrakakis | Remove the specified user from the read permissions of the Pithos file.
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256 | cda71050 | Christos Stavrakakis |
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257 | cda71050 | Christos Stavrakakis | """
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258 | cda71050 | Christos Stavrakakis | image_url = self._get_image_url(image_uuid)
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259 | cda71050 | Christos Stavrakakis | self._get_image(image_url) # Assert that it is an image |
260 | cda71050 | Christos Stavrakakis | permissions = self._get_permissions(image_url)
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261 | cda71050 | Christos Stavrakakis | read = set(permissions.get("read", [])) |
262 | cda71050 | Christos Stavrakakis | assert(isinstance(remove_user, (str, unicode))) |
263 | cda71050 | Christos Stavrakakis | try:
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264 | cda71050 | Christos Stavrakakis | read.remove(remove_user) |
265 | cda71050 | Christos Stavrakakis | except ValueError: |
266 | cda71050 | Christos Stavrakakis | return # TODO: User did not have access |
267 | cda71050 | Christos Stavrakakis | permissions["read"] = list(read) |
268 | cda71050 | Christos Stavrakakis | self._update_permissions(image_url, permissions)
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269 | 1e28ba40 | Christos Stavrakakis | |
270 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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271 | cda71050 | Christos Stavrakakis | def replace_users(self, image_uuid, replace_users): |
272 | cda71050 | Christos Stavrakakis | """Replace image members.
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273 | f13aab5d | Christos Stavrakakis |
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274 | cda71050 | Christos Stavrakakis | Replace the read permissions of the Pithos files with the specified
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275 | cda71050 | Christos Stavrakakis | users. If image is specified as public, we must preserve * permission.
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276 | f13aab5d | Christos Stavrakakis |
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277 | f13aab5d | Christos Stavrakakis | """
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278 | cda71050 | Christos Stavrakakis | image_url = self._get_image_url(image_uuid)
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279 | cda71050 | Christos Stavrakakis | image = self._get_image(image_url)
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280 | cda71050 | Christos Stavrakakis | permissions = self._get_permissions(image_url)
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281 | cda71050 | Christos Stavrakakis | assert(isinstance(replace_users, list)) |
282 | cda71050 | Christos Stavrakakis | permissions["read"] = replace_users
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283 | cda71050 | Christos Stavrakakis | if image.get("is_public", False): |
284 | cda71050 | Christos Stavrakakis | permissions["read"].append("*") |
285 | cda71050 | Christos Stavrakakis | self._update_permissions(image_url, permissions)
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286 | 1e28ba40 | Christos Stavrakakis | |
287 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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288 | cda71050 | Christos Stavrakakis | def list_users(self, image_uuid): |
289 | cda71050 | Christos Stavrakakis | """List the image members.
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290 | cda71050 | Christos Stavrakakis |
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291 | cda71050 | Christos Stavrakakis | List the image members, by listing all users that have read permission
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292 | cda71050 | Christos Stavrakakis | to the corresponding Pithos file.
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293 | cda71050 | Christos Stavrakakis |
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294 | cda71050 | Christos Stavrakakis | """
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295 | cda71050 | Christos Stavrakakis | image_url = self._get_image_url(image_uuid)
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296 | cda71050 | Christos Stavrakakis | self._get_image(image_url) # Assert that it is an image |
297 | cda71050 | Christos Stavrakakis | permissions = self._get_permissions(image_url)
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298 | cda71050 | Christos Stavrakakis | return [user for user in permissions.get('read', []) if user != '*'] |
299 | 1e28ba40 | Christos Stavrakakis | |
300 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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301 | cda71050 | Christos Stavrakakis | def update_metadata(self, image_uuid, metadata): |
302 | cda71050 | Christos Stavrakakis | """Update Image metadata."""
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303 | cda71050 | Christos Stavrakakis | image_url = self._get_image_url(image_uuid)
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304 | cda71050 | Christos Stavrakakis | self._get_image(image_url) # Assert that it is an image |
305 | 1e28ba40 | Christos Stavrakakis | |
306 | cda71050 | Christos Stavrakakis | is_public = metadata.pop("is_public", None) |
307 | cda71050 | Christos Stavrakakis | if is_public is not None: |
308 | cda71050 | Christos Stavrakakis | permissions = self._get_permissions(image_url)
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309 | cda71050 | Christos Stavrakakis | read = set(permissions.get("read", [])) |
310 | cda71050 | Christos Stavrakakis | if is_public:
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311 | cda71050 | Christos Stavrakakis | read.add("*")
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312 | cda71050 | Christos Stavrakakis | else:
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313 | cda71050 | Christos Stavrakakis | read.discard("*")
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314 | cda71050 | Christos Stavrakakis | permissions["read"] = list(read) |
315 | cda71050 | Christos Stavrakakis | self._update_permissions(image_url, permissions)
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316 | cda71050 | Christos Stavrakakis | meta = {} |
317 | cda71050 | Christos Stavrakakis | meta["properties"] = metadata.pop("properties", {}) |
318 | cda71050 | Christos Stavrakakis | meta.update(**metadata) |
319 | cda71050 | Christos Stavrakakis | |
320 | cda71050 | Christos Stavrakakis | self._update_meta(image_url, meta)
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321 | cda71050 | Christos Stavrakakis | return self.get_image(image_uuid) |
322 | 1e28ba40 | Christos Stavrakakis | |
323 | 2db7d9df | Christos Stavrakakis | @handle_backend_exceptions
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324 | cda71050 | Christos Stavrakakis | def register(self, name, image_url, metadata): |
325 | cda71050 | Christos Stavrakakis | # Validate that metadata are allowed
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326 | cda71050 | Christos Stavrakakis | if "id" in metadata: |
327 | cda71050 | Christos Stavrakakis | raise ValueError("Passing an ID is not supported") |
328 | cda71050 | Christos Stavrakakis | store = metadata.pop("store", "pithos") |
329 | cda71050 | Christos Stavrakakis | if store != "pithos": |
330 | cda71050 | Christos Stavrakakis | raise ValueError("Invalid store '%s'. Only 'pithos' store is" |
331 | cda71050 | Christos Stavrakakis | "supported" % store)
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332 | cda71050 | Christos Stavrakakis | disk_format = metadata.setdefault("disk_format",
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333 | cda71050 | Christos Stavrakakis | settings.DEFAULT_DISK_FORMAT) |
334 | cda71050 | Christos Stavrakakis | if disk_format not in settings.ALLOWED_DISK_FORMATS: |
335 | cda71050 | Christos Stavrakakis | raise ValueError("Invalid disk format '%s'" % disk_format) |
336 | cda71050 | Christos Stavrakakis | container_format =\ |
337 | cda71050 | Christos Stavrakakis | metadata.setdefault("container_format",
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338 | cda71050 | Christos Stavrakakis | settings.DEFAULT_CONTAINER_FORMAT) |
339 | cda71050 | Christos Stavrakakis | if container_format not in settings.ALLOWED_CONTAINER_FORMATS: |
340 | cda71050 | Christos Stavrakakis | raise ValueError("Invalid container format '%s'" % |
341 | cda71050 | Christos Stavrakakis | container_format) |
342 | cda71050 | Christos Stavrakakis | |
343 | cda71050 | Christos Stavrakakis | # Validate that 'size' and 'checksum' are valid
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344 | cda71050 | Christos Stavrakakis | account, container, object = split_url(image_url) |
345 | cda71050 | Christos Stavrakakis | |
346 | cda71050 | Christos Stavrakakis | meta = self._get_meta(image_url)
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347 | cda71050 | Christos Stavrakakis | |
348 | cda71050 | Christos Stavrakakis | size = int(metadata.pop('size', meta['bytes'])) |
349 | cda71050 | Christos Stavrakakis | if size != meta['bytes']: |
350 | cda71050 | Christos Stavrakakis | raise ValueError("Invalid size") |
351 | cda71050 | Christos Stavrakakis | |
352 | cda71050 | Christos Stavrakakis | checksum = metadata.pop('checksum', meta['hash']) |
353 | cda71050 | Christos Stavrakakis | if checksum != meta['hash']: |
354 | cda71050 | Christos Stavrakakis | raise ValueError("Invalid checksum") |
355 | cda71050 | Christos Stavrakakis | |
356 | cda71050 | Christos Stavrakakis | # Fix permissions
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357 | cda71050 | Christos Stavrakakis | is_public = metadata.pop('is_public', False) |
358 | cda71050 | Christos Stavrakakis | if is_public:
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359 | cda71050 | Christos Stavrakakis | permissions = {'read': ['*']} |
360 | cda71050 | Christos Stavrakakis | else:
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361 | cda71050 | Christos Stavrakakis | permissions = {'read': [self.user]} |
362 | cda71050 | Christos Stavrakakis | |
363 | cda71050 | Christos Stavrakakis | # Update rest metadata
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364 | cda71050 | Christos Stavrakakis | meta = {} |
365 | cda71050 | Christos Stavrakakis | meta['properties'] = metadata.pop('properties', {}) |
366 | cda71050 | Christos Stavrakakis | meta.update(name=name, status='available', **metadata)
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367 | cda71050 | Christos Stavrakakis | |
368 | cda71050 | Christos Stavrakakis | # Do the actualy update in the Pithos backend
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369 | cda71050 | Christos Stavrakakis | self._update_meta(image_url, meta)
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370 | cda71050 | Christos Stavrakakis | self._update_permissions(image_url, permissions)
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371 | 62d3ea53 | Christos Stavrakakis | logger.debug("User '%s' created image '%s'('%s')", self.user, |
372 | 62d3ea53 | Christos Stavrakakis | image_url, name) |
373 | cda71050 | Christos Stavrakakis | return self._get_image(image_url) |
374 | cda71050 | Christos Stavrakakis | |
375 | 14c94c48 | Christos Stavrakakis | def _list_images(self, user=None, filters=None, params=None): |
376 | d19e8f77 | Giorgos Verigakis | filters = filters or {}
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377 | 1e28ba40 | Christos Stavrakakis | |
378 | 14c94c48 | Christos Stavrakakis | # TODO: Use filters
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379 | 14c94c48 | Christos Stavrakakis | # # Fix keys
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380 | 14c94c48 | Christos Stavrakakis | # keys = [PLANKTON_PREFIX + 'name']
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381 | 14c94c48 | Christos Stavrakakis | # size_range = (None, None)
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382 | 14c94c48 | Christos Stavrakakis | # for key, val in filters.items():
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383 | 14c94c48 | Christos Stavrakakis | # if key == 'size_min':
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384 | 14c94c48 | Christos Stavrakakis | # size_range = (val, size_range[1])
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385 | 14c94c48 | Christos Stavrakakis | # elif key == 'size_max':
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386 | 14c94c48 | Christos Stavrakakis | # size_range = (size_range[0], val)
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387 | 14c94c48 | Christos Stavrakakis | # else:
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388 | 14c94c48 | Christos Stavrakakis | # keys.append('%s = %s' % (PLANKTON_PREFIX + key, val))
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389 | 14c94c48 | Christos Stavrakakis | _images = self.backend.get_domain_objects(domain=PLANKTON_DOMAIN,
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390 | 14c94c48 | Christos Stavrakakis | user=user) |
391 | 14c94c48 | Christos Stavrakakis | |
392 | 14c94c48 | Christos Stavrakakis | images = [] |
393 | 14c94c48 | Christos Stavrakakis | for (location, meta, permissions) in _images: |
394 | 14c94c48 | Christos Stavrakakis | image_url = "pithos://" + location
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395 | 14c94c48 | Christos Stavrakakis | meta["modified"] = meta["version_timestamp"] |
396 | 14c94c48 | Christos Stavrakakis | # TODO: Create metadata when registering an Image
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397 | 14c94c48 | Christos Stavrakakis | meta["created"] = meta["version_timestamp"] |
398 | 14c94c48 | Christos Stavrakakis | images.append(image_to_dict(image_url, meta, permissions)) |
399 | 14c94c48 | Christos Stavrakakis | |
400 | 14c94c48 | Christos Stavrakakis | if params is None: |
401 | 14c94c48 | Christos Stavrakakis | params = {} |
402 | aed77afe | Christos Stavrakakis | key = itemgetter(params.get('sort_key', 'created_at')) |
403 | aed77afe | Christos Stavrakakis | reverse = params.get('sort_dir', 'desc') == 'desc' |
404 | aed77afe | Christos Stavrakakis | images.sort(key=key, reverse=reverse) |
405 | aed77afe | Christos Stavrakakis | return images
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406 | 1e28ba40 | Christos Stavrakakis | |
407 | 14c94c48 | Christos Stavrakakis | def list_images(self, filters=None, params=None): |
408 | 14c94c48 | Christos Stavrakakis | return self._list_images(user=self.user, filters=filters, |
409 | 14c94c48 | Christos Stavrakakis | params=params) |
410 | 14c94c48 | Christos Stavrakakis | |
411 | 14c94c48 | Christos Stavrakakis | def list_shared_images(self, member, filters=None, params=None): |
412 | 14c94c48 | Christos Stavrakakis | images = self._list_images(user=self.user, filters=filters, |
413 | 14c94c48 | Christos Stavrakakis | params=params) |
414 | 14c94c48 | Christos Stavrakakis | is_shared = lambda img: not img["is_public"] and img["owner"] == member |
415 | 14c94c48 | Christos Stavrakakis | return filter(is_shared, images) |
416 | 14c94c48 | Christos Stavrakakis | |
417 | 14c94c48 | Christos Stavrakakis | def list_public_images(self, filters=None, params=None): |
418 | 14c94c48 | Christos Stavrakakis | images = self._list_images(user=None, filters=filters, params=params) |
419 | 14c94c48 | Christos Stavrakakis | return filter(lambda img: img["is_public"], images) |
420 | 1e28ba40 | Christos Stavrakakis | |
421 | 1e28ba40 | Christos Stavrakakis | |
422 | cda71050 | Christos Stavrakakis | class ImageBackendError(Exception): |
423 | cda71050 | Christos Stavrakakis | pass
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424 | 1e28ba40 | Christos Stavrakakis | |
425 | 1e28ba40 | Christos Stavrakakis | |
426 | cda71050 | Christos Stavrakakis | class ImageNotFound(ImageBackendError): |
427 | cda71050 | Christos Stavrakakis | pass
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428 | f13aab5d | Christos Stavrakakis | |
429 | f13aab5d | Christos Stavrakakis | |
430 | cda71050 | Christos Stavrakakis | class Forbidden(ImageBackendError): |
431 | cda71050 | Christos Stavrakakis | pass
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432 | 14c94c48 | Christos Stavrakakis | |
433 | 14c94c48 | Christos Stavrakakis | |
434 | 14c94c48 | Christos Stavrakakis | def image_to_dict(image_url, meta, permissions): |
435 | 14c94c48 | Christos Stavrakakis | """Render an image to a dictionary"""
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436 | 14c94c48 | Christos Stavrakakis | account, container, name = split_url(image_url) |
437 | 14c94c48 | Christos Stavrakakis | |
438 | 14c94c48 | Christos Stavrakakis | image = {} |
439 | 14c94c48 | Christos Stavrakakis | if PLANKTON_PREFIX + 'name' not in meta: |
440 | 14c94c48 | Christos Stavrakakis | raise ImageNotFound("'%s' is not a Plankton image" % image_url) |
441 | 14c94c48 | Christos Stavrakakis | |
442 | 14c94c48 | Christos Stavrakakis | image["id"] = meta["uuid"] |
443 | 14c94c48 | Christos Stavrakakis | image["location"] = image_url
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444 | 14c94c48 | Christos Stavrakakis | image["checksum"] = meta["hash"] |
445 | 14c94c48 | Christos Stavrakakis | image["created_at"] = format_timestamp(meta["created"]) |
446 | 14c94c48 | Christos Stavrakakis | deleted = meta.get("deleted", None) |
447 | 14c94c48 | Christos Stavrakakis | image["deleted_at"] = format_timestamp(deleted) if deleted else "" |
448 | 14c94c48 | Christos Stavrakakis | image["updated_at"] = format_timestamp(meta["modified"]) |
449 | 14c94c48 | Christos Stavrakakis | image["size"] = meta["bytes"] |
450 | 14c94c48 | Christos Stavrakakis | image["store"] = "pithos" |
451 | 14c94c48 | Christos Stavrakakis | image['owner'] = account
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452 | 14c94c48 | Christos Stavrakakis | |
453 | 14c94c48 | Christos Stavrakakis | # Permissions
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454 | 14c94c48 | Christos Stavrakakis | image["is_public"] = "*" in permissions.get('read', []) |
455 | 14c94c48 | Christos Stavrakakis | |
456 | 14c94c48 | Christos Stavrakakis | for key, val in meta.items(): |
457 | 14c94c48 | Christos Stavrakakis | # Get plankton properties
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458 | 14c94c48 | Christos Stavrakakis | if key.startswith(PLANKTON_PREFIX):
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459 | 14c94c48 | Christos Stavrakakis | # Remove plankton prefix
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460 | 14c94c48 | Christos Stavrakakis | key = key.replace(PLANKTON_PREFIX, "")
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461 | 14c94c48 | Christos Stavrakakis | # Keep only those in plankton meta
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462 | 14c94c48 | Christos Stavrakakis | if key in PLANKTON_META: |
463 | 14c94c48 | Christos Stavrakakis | if key == "properties": |
464 | 14c94c48 | Christos Stavrakakis | val = json.loads(val) |
465 | 14c94c48 | Christos Stavrakakis | image[key] = val |
466 | 14c94c48 | Christos Stavrakakis | |
467 | 14c94c48 | Christos Stavrakakis | return image |