root / snf-cyclades-app / synnefo / plankton / utils.py @ d0986bac
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1 | cda71050 | Christos Stavrakakis | # Copyright 2011-2013 GRNET S.A. All rights reserved.
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2 | d9d1763e | Christos Stavrakakis | #
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3 | d9d1763e | Christos Stavrakakis | # Redistribution and use in source and binary forms, with or
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4 | d9d1763e | Christos Stavrakakis | # without modification, are permitted provided that the following
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5 | d9d1763e | Christos Stavrakakis | # conditions are met:
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6 | d9d1763e | Christos Stavrakakis | #
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7 | d9d1763e | Christos Stavrakakis | # 1. Redistributions of source code must retain the above
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8 | d9d1763e | Christos Stavrakakis | # copyright notice, this list of conditions and the following
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9 | d9d1763e | Christos Stavrakakis | # disclaimer.
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10 | d9d1763e | Christos Stavrakakis | #
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11 | d9d1763e | Christos Stavrakakis | # 2. Redistributions in binary form must reproduce the above
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12 | d9d1763e | Christos Stavrakakis | # copyright notice, this list of conditions and the following
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13 | d9d1763e | Christos Stavrakakis | # disclaimer in the documentation and/or other materials
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14 | d9d1763e | Christos Stavrakakis | # provided with the distribution.
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15 | d9d1763e | Christos Stavrakakis | #
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16 | d9d1763e | Christos Stavrakakis | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | d9d1763e | Christos Stavrakakis | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | d9d1763e | Christos Stavrakakis | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | d9d1763e | Christos Stavrakakis | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | d9d1763e | Christos Stavrakakis | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | d9d1763e | Christos Stavrakakis | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | d9d1763e | Christos Stavrakakis | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | d9d1763e | Christos Stavrakakis | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | d9d1763e | Christos Stavrakakis | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | d9d1763e | Christos Stavrakakis | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | d9d1763e | Christos Stavrakakis | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | d9d1763e | Christos Stavrakakis | # POSSIBILITY OF SUCH DAMAGE.
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28 | d9d1763e | Christos Stavrakakis | #
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29 | d9d1763e | Christos Stavrakakis | # The views and conclusions contained in the software and
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30 | d9d1763e | Christos Stavrakakis | # documentation are those of the authors and should not be
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31 | d9d1763e | Christos Stavrakakis | # interpreted as representing official policies, either expressed
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32 | d9d1763e | Christos Stavrakakis | # or implied, of GRNET S.A.
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33 | d9d1763e | Christos Stavrakakis | |
34 | d9d1763e | Christos Stavrakakis | from contextlib import contextmanager |
35 | cda71050 | Christos Stavrakakis | from synnefo.plankton import backend |
36 | cda71050 | Christos Stavrakakis | from snf_django.lib.api import faults |
37 | d9d1763e | Christos Stavrakakis | |
38 | d9d1763e | Christos Stavrakakis | |
39 | d9d1763e | Christos Stavrakakis | @contextmanager
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40 | d9d1763e | Christos Stavrakakis | def image_backend(user_id): |
41 | cda71050 | Christos Stavrakakis | """Context manager for ImageBackend.
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42 | cda71050 | Christos Stavrakakis |
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43 | cda71050 | Christos Stavrakakis | Context manager for using ImageBackend in API methods. Handles
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44 | cda71050 | Christos Stavrakakis | opening and closing a connection to Pithos and converting backend
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45 | cda71050 | Christos Stavrakakis | erros to cloud faults.
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46 | cda71050 | Christos Stavrakakis |
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47 | cda71050 | Christos Stavrakakis | """
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48 | cda71050 | Christos Stavrakakis | image_backend = backend.ImageBackend(user_id) |
49 | d9d1763e | Christos Stavrakakis | try:
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50 | cda71050 | Christos Stavrakakis | yield image_backend
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51 | cda71050 | Christos Stavrakakis | except backend.Forbidden:
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52 | cda71050 | Christos Stavrakakis | raise faults.Forbidden
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53 | cda71050 | Christos Stavrakakis | except backend.ImageNotFound:
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54 | cda71050 | Christos Stavrakakis | raise faults.ItemNotFound
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55 | d9d1763e | Christos Stavrakakis | finally:
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56 | cda71050 | Christos Stavrakakis | image_backend.close() |