author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Tue, 15 May 2012 14:44:45 +0200 | |
changeset 8409 | 79534887943e |
parent 7877 | 662ad647306f |
child 8601 | 1a6000ff2080 |
permissions | -rw-r--r-- |
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# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr |
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# |
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# This file is part of CubicWeb. |
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# |
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# CubicWeb is free software: you can redistribute it and/or modify it under the |
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# terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 2.1 of the License, or (at your option) |
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# any later version. |
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# |
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License along |
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# with CubicWeb. If not, see <http://www.gnu.org/licenses/>. |
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"""json export views""" |
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from __future__ import with_statement |
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__docformat__ = "restructuredtext en" |
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_ = unicode |
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from cubicweb.utils import json_dumps |
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from cubicweb.view import EntityView, AnyRsetView |
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from cubicweb.web.application import anonymized_request |
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from cubicweb.web.views import basecontrollers |
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class JsonpController(basecontrollers.ViewController): |
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"""The jsonp controller is the same as a ViewController but : |
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- anonymize request (avoid CSRF attacks) |
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- if ``vid`` parameter is passed, make sure it's sensible (i.e. either |
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"jsonexport" or "ejsonexport") |
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- if ``callback`` request parameter is passed, it's used as json padding |
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Response's content-type will either be ``application/javascript`` or |
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``application/json`` depending on ``callback`` parameter presence or not. |
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""" |
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__regid__ = 'jsonp' |
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def publish(self, rset=None): |
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if 'vid' in self._cw.form: |
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vid = self._cw.form['vid'] |
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if vid not in ('jsonexport', 'ejsonexport'): |
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self.warning("vid %s can't be used with jsonp controller, " |
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"falling back to jsonexport", vid) |
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self._cw.form['vid'] = 'jsonexport' |
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else: # if no vid is specified, use jsonexport |
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self._cw.form['vid'] = 'jsonexport' |
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with anonymized_request(self._cw): |
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json_data = super(JsonpController, self).publish(rset) |
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if 'callback' in self._cw.form: # jsonp |
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json_padding = self._cw.form['callback'] |
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# use ``application/javascript`` is ``callback`` parameter is |
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# provided, let ``application/json`` otherwise |
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self._cw.set_content_type('application/javascript') |
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json_data = '%s(%s)' % (json_padding, json_data) |
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return json_data |
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class JsonMixIn(object): |
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"""mixin class for json views |
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Handles the following optional request parameters: |
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- ``_indent`` : must be an integer. If found, it is used to pretty print |
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json output |
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""" |
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templatable = False |
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content_type = 'application/json' |
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binary = True |
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def wdata(self, data): |
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if '_indent' in self._cw.form: |
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indent = int(self._cw.form['_indent']) |
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else: |
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indent = None |
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self.w(json_dumps(data, indent=indent)) |
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class JsonRsetView(JsonMixIn, AnyRsetView): |
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"""dumps raw result set in JSON format""" |
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__regid__ = 'jsonexport' |
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title = _('json-export-view') |
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def call(self): |
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# XXX mimic w3c recommandations to serialize SPARQL results in json ? |
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# http://www.w3.org/TR/rdf-sparql-json-res/ |
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self.wdata(self.cw_rset.rows) |
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class JsonEntityView(JsonMixIn, EntityView): |
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"""dumps rset entities in JSON |
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The following additional metadata is added to each row : |
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- ``__cwetype__`` : entity type |
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""" |
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__regid__ = 'ejsonexport' |
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title = _('json-entities-export-view') |
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104 |
|
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105 |
def call(self): |
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106 |
entities = [] |
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107 |
for entity in self.cw_rset.entities(): |
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108 |
entity.complete() # fetch all attributes |
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109 |
# hack to add extra metadata |
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110 |
entity.cw_attr_cache.update({ |
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111 |
'__cwetype__': entity.__regid__, |
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112 |
}) |
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entities.append(entity) |
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114 |
self.wdata(entities) |