from django.http import HttpResponseNotAllowed

def my_view(request):
    if request.method != 'POST':
        return HttpResponseNotAllowed('Only POST here')


# decorators
def post_only(func):
    def decorated(request, *args, **kwargs):
        if request.method != 'POST':
            return HttpResponseNotAllowed('Only POST here')
        return func(request, *args, **kwargs)
    return decorated

def get_only(func):
    def decorated(request, *args, **kwargs):
        if request.method != 'GET':
            return HttpResponseNotAllowed('Only GET here')
        return func(request, *args, **kwargs)
    return decorated