Django API Request Decorator

rest_utils.py

import json
import logging

from django.http import HttpResponse

logger = logging.getLogger(__name__)

ALLOWED_REQUEST_TYPES = ('GET', 'POST', 'PUT', 'DELETE')


def api_request_decorator(*request_types):
    """Sample usage in views.py:
    @api_request_decorator('POST')
    def sample_api_endpoint(request):
        return {'foo': 'bar'}
    """
    def _return_response(response_dict, status=200):
        response = json.dumps(response_dict)
        return HttpResponse(response, status=status, content_type="application/javascript")

    def _return_error_response(error):
        response_dict = {'error': error}
        return _return_response(response_dict, status=400)

    for request_type in request_types:
        if request_type not in ALLOWED_REQUEST_TYPES:
            return _return_error_response("Invalid request_type specified")

    def inner_decorator(func):
        def inner(request, *args, **kwargs):
            try:
                if request.method not in request_types:
                    raise Exception('request type %s required for this method' % request_type)
                return _return_response(func(request, *args, **kwargs))
            except Exception, e:
                logger.exception("Exception caught in API request: %s" % e)
            return _return_error_response(e.message)
        return inner
   
    return inner_decorator