Django middleware: Isn't a middleware module error

Question

I am using the middleware provided in https://gist.github.com/426829 to do cross site scripting.

However, when I add the middleware to MIDDLEWARE_CLASSES, I get the error:

ImproperlyConfigured: isn't a middleware module.

My MIDDLEWARE_CLASSES looks like this:

MIDDLEWARE_CLASSES = ('django.middleware.common.CommonMiddleware',
                      'django.contrib.sessions.middleware.SessionMiddleware',
                      'django.middleware.csrf.CsrfViewMiddleware',
                      'django.contrib.auth.middleware.AuthenticationMiddleware',
                      'django.contrib.messages.middleware.MessageMiddleware',
                      'TempMiddleware',)

I have not changed any code in the gist. process_request and process_response methods are there. I am on Ubuntu running the latest versions of Python and Django.

Answer 1

What's TempMiddleware? The name of the module, or the name of the class? As you can see with the other entries, you need the fully-qualified Python path of the actual class. If TempMiddleware is the name of the module, you need TempMiddleware.MyMiddlewareClass (and you should really follow PEP8 naming conventions) - and if it's the name of the class, you need my_module.TempMiddleware.

Answer 2

Edit:

TempMiddleware is not importable. It's the name of the class, you must put the entire import path.

E.g:

'django.contrib.auth.middleware.AuthenticationMiddleware'

and not

'AuthenticationMiddleware'

So if your class is in app_name/middleware.py, it should be

app_name.middlaware.TempMiddleware

---

It just mean that in your settings file, the variable MIDDLEWARE_CLASSES contains a list of modules in which one of the listed module is not a middleware.

Possible causes:

• you added a middleware that doesn't declare middleware methods: fix that by removing the last middleware you added
• you added a correct middleware but forget to put a coma at the end of the name, so strings are concatenated and it make django thinks 2 middlewares are in fact one: fix that by adding the missing coma