The biggest missing piece is simple, well-tested middleware.

My focus has been on very general middleware; a kind of 'meta-middleware' that actually spec out a common behavior to minimize surprises and boilerplate. For example, my Renderer & RenderEngine classes[0] don't do anything on their own, but are intended to be used by other, more specific renderers (eg MakoRenderer, JinjaRenderer). I think some common functionality really need to be standardized and not done ad-hoc, as conflicts could arise. (more description on how Renderers work below)

The next one of these I'd like to solve is authentication: a standard interface for passwords/oauth/etc. I've kinda used http://passportjs.org before, might be a starting point; I don't know what a pythonic version would look like.

## Non-Middleware

- Figure out equivalent of JS EventEmitter interface. Currently I have no good way to do something like res.on('send-headers', cb) ~ (thinking res.events['send-headers'].add(cb)) with events as EventManager object. Maybe decorators here?

- ETAGs

- HTTP/2

- pytest-growler for automated fixtures

- I don't think an admin panel is necessary (can't beat django) but would like some CLI tools for site creation, testing, and deployment.

Renderer Explaination: (too many 'render' words)

The author creates a RenderEngine as the actual middleware: app.use(MakoRenderer("/path/to/view")). All this middleware does is attach a callable Renderer object to res at res.render if it doesn't exist, then add itself to res.render - this allows multiple RenderEngines in the same app (if the author desires) - and none of them will clobber one another. Upon calling the Renderer: res.render('foo', data_obj), the callable scans through the engines until one with 'foo' is found, then the rendered text is sent. It's non-(obvious|trivial) situations like these I want in Growler proper (some batteries included) - the rest can be extensions.

[0] https://github.com/pyGrowler/Growler/blob/dev/growler/middle...

/foo/{bar} or /foo/:bar => re.compile(r'/foo/(?P<bar>[^/]+)')

https://github.com/pyGrowler/Growler/blob/dev/growler/router...