[Answered ]-Python django 1.4 how to set two WWW-Authenticate http headers

I guess a middleware would be best for this task, but in case you have something else in mind, here is the middleware code adjusted to work with your view(which you can very easily still turn into a middleware if you decide to do so):

from django.conf import settings
from django.http import HttpResponse

def basic_challenge(realm=None):
    if realm is None:
        realm = getattr(settings,
                        'WWW_AUTHENTICATION_REALM',
                        'Restricted Access')
    response = HttpResponse('Authorization Required',
                            mimetype="text/plain")
    response['WWW-Authenticate'] = 'Basic realm="%s"' % (realm)
    response.status_code = 401
    return response

def basic_authenticate(authentication):
    (authmeth, auth) = authentication.split(' ', 1)
    if 'basic' != authmeth.lower():
        return None

    auth = auth.strip().decode('base64')
    username, password = auth.split(':', 1)
    AUTHENTICATION_USERNAME = getattr(settings,
                                      'BASIC_WWW_AUTHENTICATION_USERNAME')
    AUTHENTICATION_PASSWORD = getattr(settings,
                                      'BASIC_WWW_AUTHENTICATION_PASSWORD')
    return (username == AUTHENTICATION_USERNAME and
            password == AUTHENTICATION_PASSWORD)

def auth_view(request):
    auth = request.META.get('HTTP_AUTHORIZATION', '')

    if auth.startswith('Negotiate YII'):
        pass
    elif auth:
        if basic_authenticate(auth):
            #successfully authenticated
            pass
        else:
            return basic_challenge()

    # nothing matched, still return basic challange
    return basic_challenge()