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annotate roundup/cgi/TAL/TranslationContext.py @ 5630:07abc8d36940

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Add etag support to rest interface to prevent multiple users from overwriting other users changes. All GET requests for an object (issue, user, keyword etc.) or a property of an object (e.g the title of an issue) return the etag for the object in the ETag header as well as the @etag field in the returned object. All requests that change existing objects (DELETE, PUT or PATCH) require: 1 A request include an ETag header with the etag value retrieved for the object. 2 A submits a form that includes the field @etag that must have the value retrieved for the object. If an etag is not supplied by one of these methods, or any supplied etag does not match the etag calculated at the time the DELETE, PUT or PATCH request is made, HTTP error 412 (Precondition Failed) is returned and no change is made. At that time the client code should retrieve the object again, reconcile the changes and can try to send a new update. The etag is the md5 hash of the representation (repr()) of the object retrieved from the database.
author John Rouillard <rouilj@ieee.org>
date Fri, 01 Mar 2019 22:57:07 -0500
parents 6e3e4f24c753
children
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1 ##############################################################################
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2 #
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3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors.
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4 # All Rights Reserved.
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5 #
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6 # This software is subject to the provisions of the Zope Public License,
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7 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
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8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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11 # FOR A PARTICULAR PURPOSE.
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12 #
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13 ##############################################################################
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14 """Translation context object for the TALInterpreter's I18N support.
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15
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16 The translation context provides a container for the information
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17 needed to perform translation of a marked string from a page template.
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18 """
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19
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20 DEFAULT_DOMAIN = "default"
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21
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22 class TranslationContext:
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23 """Information about the I18N settings of a TAL processor."""
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24
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25 def __init__(self, parent=None, domain=None, target=None, source=None):
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26 if parent:
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27 if not domain:
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28 domain = parent.domain
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29 if not target:
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30 target = parent.target
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31 if not source:
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32 source = parent.source
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33 elif domain is None:
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34 domain = DEFAULT_DOMAIN
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35
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36 self.parent = parent
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37 self.domain = domain
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38 self.target = target
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39 self.source = source
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