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# IVLE - Informatics Virtual Learning Environment
# Copyright (C) 2007-2009 The University of Melbourne
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# Author: Matt Giuca, Will Grant
import cjson
class BaseView(object):
"""
Abstract base class for all view objects.
"""
def __init__(self, req, **kwargs):
pass
def render(self, req):
pass
class RESTView(BaseView):
"""
A view which provides a RESTful interface. The content type is
unspecified (see JSONRESTView for a specific content type).
"""
content_type = "application/octet-stream"
def __init__(self, req, *args, **kwargs):
pass
def render(self, req):
if req.method == 'GET':
outstr = self.GET(req)
# XXX PATCH hack
if req.method == 'PUT':
outstr = self.PATCH(req, req.read())
req.content_type = self.content_type
req.write(outstr)
class JSONRESTView(RESTView):
"""
A special case of RESTView which deals entirely in JSON.
"""
content_type = "application/json"
def render(self, req):
if req.method == 'GET':
outjson = self.GET(req)
# XXX PATCH hack
if req.method == 'PUT':
outjson = self.PATCH(req, cjson.decode(req.read()))
req.content_type = self.content_type
req.write(cjson.encode(outjson))
req.write("\n")
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