[views] implement a custom json error view
If the client asked for ``(e)jsonexport`` view, answer
him with a json response rather than an error formatted
in a big HTML blob.
add a custom _requested_vid predicate. In cw 3.21, it will
be deprecated in favor of ``match_form_params(vid=('jsonexport', 'ejsonexport'))``
# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
from logilab.common.deprecation import class_renamed, class_moved
from cubicweb.server import hook
SystemHook = class_renamed('SystemHook', hook.Hook)
Hook = class_moved(hook.Hook)