Mastering Django: Core

Available middleware

Cache middleware

django.middleware.cache.UpdateCacheMiddleware; and django.middleware.cache.FetchFromCacheMiddleware

Enable the site-wide cache. If these are enabled, each Django-powered page will be cached for as long as the CACHE_MIDDLEWARE_SECONDS setting defines. See the cache documentation.

Common middleware

django.middleware.common.CommonMiddleware

Adds a few conveniences for perfectionists:

• Forbids access to user agents in the DISALLOWED_USER_AGENTS setting, which should be a list of compiled regular expression objects.
• Performs URL rewriting based on the APPEND_SLASH and PREPEND_WWW settings.
• If APPEND_SLASH is True and the initial URL doesn't end with a slash, and it is not found in the URLconf, then a new URL is formed ...