Synnefo

# vim: ts=4 sts=4 et ai sw=4 fileencoding=utf-8

#

# Copyright © 2010 Greek Research and Technology Network

#

from django.http import HttpResponse

from django.utils import simplejson

from piston.utils import HttpStatusCode

class Fault(HttpStatusCode):

    """Fault Exception"""

    pass

class _fault_factory(object):

    """

    Openstack API Faults factory

    """

    faults = {

        'serviceUnavailable': {

                'code': 503,

                'message': 'Service Unavailable',

            },

        'unauthorized': {

                'code': 401,

                'message': 'Unauthorized',

            },

        'badRequest': {

                'code': 400,

                'message': 'Bad request',

            },

        'overLimit': {

                'code': 413,

                'message': 'Overlimit',

            },

        'badMediaType': {

                'code': 415,

                'message': 'Bad media type',

            },

        'badMethod': {

                'code': 405,

                'message': 'Bad method',

            },

        'itemNotFound': {

                'code': 404,

                'message': 'Not Found',

            },

        'buildInProgress': {

                'code': 409,

                'message': 'Build in progress',

            },

        'serverCapacityUnavailable': {

                'code': 503,

                'message': 'Server capacity unavailable',

            },

        'backupOrResizeInProgress': {

                'code': 409,

                'message': 'Backup or resize in progress',

            },

        'resizeNotAllowed': {

                'code': 403,

                'message': 'Resize not allowed',

            },

        'notImplemented': {

                'code': 501,

                'message': 'Not Implemented',

            },

        }

    def __getattr__(self, attr):

        try:

            m = self.faults.get(attr)

        except TypeError:

            raise AttributeError(attr)

        # details are not supported for now

        m['details'] = ''

        # piston > 0.2.2 does the serialization for us, but be compatible

        # 'till the next version gets released. XXX: this doesn't do XML!

        message = simplejson.dumps({ attr: m }, ensure_ascii=False, indent=4)

        code = m['code']

        response = HttpResponse(message, status=code)

        return Fault(response)

fault = _fault_factory()

# these are in the 2xx range, hence not faults/exceptions

noContent = HttpResponse(status=204)

accepted = HttpResponse(status=202)

created = HttpResponse(status=201)