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= Watts == Intro Watts is a minimalist, Rack-based, resource-oriented web framework. It has fewer than 400 lines of code (including comments), no dependencies, and only does one thing: it maps resources. == Goals Dead-simple web development. I don't want a framework to take up so much of my brain that there's no space left for my application. == Resource Orientation If you think of resources as first-class objects, and then think of HTTP methods as operations on those objects, then this should probably make sense. Most of the web frameworks I have seen seem to be HTTP-method-oriented rather than resource-oriented. It seems odd to me (not to mention repetitive) that you would type "A GET on /foo does this, a POST on /foo does that, ..." rather than "There's a resource at /foo. That resource's GET does this, and its POST does that, ...". And because the second one made more sense to me, that's how I wrote Watts. Let me clarify if that was a bit vague, by showing how a Watts app comes into being: * You make a resource by sub-classing Watts::Resource. * On this resource, you define some basic operations, in terms of HTTP methods. * You create an app by sub-classing Watts::App. * You use the resource() method to tell Watts the path under which the resource can be found. There are a few easy-to-read examples in doc/examples. == Pattern-matching That resource() method mentioned above? It does some pattern-matching on the different components of the path. They all arrive as strings, of course. The priority for matches is that Watts will attempt to match a string literally if possible. Next it tries to match any regex patterns that have been specified, and failing that, symbols are used as a catch-all. Here are a few patterns and the things they match: * '' matches '/' * 'foo' matches '/foo'. * 'foo/bar' matches '/foo/bar'. *  matches '/'. * ['foo'] matches '/foo'. * ['foo', 'bar'] matches '/foo/bar'. * ['foo', /^[0-9+]$/] matches '/foo/', followed by a string of digits. The matching part of the path will be passed as an argument to the method on the resource when it is called. * ['foo', :arg] matches '/foo/' followed by anything. Like with the regex, the argument is passed in. The symbol's actual value doesn't really matter to Watts; it is intended for documentation. == REST, RFC 2616, TL;DR There's a lot of talk on the internets about what exactly REST is, why it's important, why we're doing it wrong, content-negotiation, discoverability, avoiding out-of-band communication, and all of that stuff. Watts makes it a little easier to comply with the spec than Rails or Sinatra if you know what the spec says, but it doesn't get all in your face about that stuff if you don't care. (You should definitely care, but Watts won't make you.) == Design Lots of web frameworks move very quickly, have a large number of features, a large number of bugs resulting from the large number of features, and an onerous upgrade process when updating to a new version. Watts has a much more strict policy: do not add a feature unless it is obviously correct. Except for the earliest versions, every new feature that made it into Watts has been implemented in two or three Watts applications, and looks very different than it would look if it had been implemented based on speculation. (I've been hacking for a long time; this may seem obvious to older hackers, but you have to build something a few times before you understand it well enough to put it into a framework.) If you feel that Watts sorely misses some features, the codebase is very small, and as a result very amenable to extension. == Bugs I'm sure they're present. You can email me about them, or ping me on GitHub, or send a patch. == About the Name I named it after a character in a video game that I liked as a kid (and still like). It's also the name of a city not far from where I live. Also: joules per second. == Author Pete Elmore. Feel free to email me using pete at debu dot gs. I'm on GitHub at http://github.com/pete . Also there's http://debu.gs/ , which runs Watts. === Acknowledgements The commits coming just from me is a bit misleading! Suggestions and tweaks have been provided by friends and coworkers: * John Dewey ( http://bitbucket.org/retr0h ) * Jim Radford ( http://github.com/radford ) * Johnathon Britz ( http://github.com/johnathonbritz ) * Justin George ( http://github.com/jaggederest ) And, as with Hoshi ( http://github.com/pete/hoshi ), I think I'll continue the tradition of crediting the music I was blasting while writing out the first draft: Softball and Dance☆Man. == Licensing See doc/LICENSE for the specifics.