ping_webinterface.py
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	## This file is part of Invenio.
	## Copyright (C) 2012 CERN.
	##
	## Invenio is free software; you can redistribute it and/or
	## modify it under the terms of the GNU General Public License as
	## published by the Free Software Foundation; either version 2 of the
	## License, or (at your option) any later version.
	##
	## Invenio 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
	## General Public License for more details.
	##
	## You should have received a copy of the GNU General Public License
	## along with Invenio; if not, write to the Free Software Foundation, Inc.,
	## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

	"""
	HTTP ping web interface. Useful to be called by load-balancer (e.g.
	HAProxy) to see whether Invenio WSGI app is up and running.
	"""

	from invenio.ext.legacy.handler import WebInterfaceDirectory

	class WebInterfacePingPages(WebInterfaceDirectory):
	_exports = [""]

	def __call__(self, req, form):
	return 'OK'

	index = __call__