rustless 0.3.0

Rustless is a REST-like API micro-framework for Rust.
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use serialize::json::{ToJson, as_pretty_json};

use errors::{self, Error};
use framework;
use framework::media;
use backend;
use server::status;


pub fn create_default_error_formatter() -> framework::ErrorFormatter  {
    let closure = |&: err: &Box<errors::Error>, media: &media::Media| -> Option<backend::Response> {
        match err.downcast::<errors::Validation>() {
            Some(err) => {
                match media.format {
                    media::Format::JsonFormat => Some(backend::Response::from_json(
                        status::StatusCode::BadRequest, 
                        &err.reason.to_json()
                    )),
                    // TODO: Make formatter for a mere mortals
                    _ => Some(
                        backend::Response::from_string(
                            status::StatusCode::BadRequest, 
                            as_pretty_json(&err.reason.to_json()).indent(4u32).to_string()
                        )
                    )  
                }
            },
            None => None
        }
    };

    Box::new(closure)
}