'Return a dictionary of query param filters from the request.
:param req: the Request object coming from the wsgi layer
:retval a dict of key/value filters'

def _get_filters(self, req):

    filters = {}
    for param in req.params:
        if ((param in SUPPORTED_FILTERS) or param.startswith('property-')):
            filter_name = SUPPORTED_FILTERS.get(param, param)
            filters[filter_name] = req.params.get(param)
    filter_name = 'property-instance_uuid'
    try:
        filters[filter_name] = filters[filter_name].rsplit('/', 1)[1]
    except (AttributeError, IndexError, KeyError):
        pass
    filter_name = 'status'
    if (filter_name in filters):
        filters[filter_name] = filters[filter_name].lower()
    return filters
