from django.views.decorators.csrf import csrf_view_exempt
from django.middleware.csrf import CsrfViewMiddleware
 
# Function to check CSRF on demand (use {% csrf_token %} in your forms as usual)
def facebook_csrf_check(request):
    return CsrfViewMiddleware().process_view(request, facebook_csrf_check, None, None) == None

# Your canvas view
@csrf_view_exempt
def facebook_canvas(request):
 
    if is_valid_access_token(request): # check whether a correct access_token presents
        # do something
 
    print 'CSRF ' + str(facebook_csrf_check(request)) # facebook_csrf_check == True means CSRF is OK