Persistent storage as middleware for the Iron web framework.
use iron::Plugin; // Request::get is provided through this trait.
pub struct HitCounter;
impl Assoc<uint> for HitCounter {}
fn serve_hits(req: &mut Request) -> IronResult<Response> {
let mutex = req.get::<Write<HitCounter, uint>>().unwrap();
let mut count = mutex.lock();
*count += 1;
Ok(Response::with(status::Ok, format!("Hits: {}", *count)))
}
fn main() {
let mut chain = ChainBuilder::new(serve_hits);
chain.link(Write::<HitCounter, uint>::both(0u));
Iron::new(chain).listen(Ipv4Addr(127, 0, 0, 1), 3000);
}persistent is a part of Iron's core bundle.
- Share persistent data across requests
- Read or modify locally stored data
If you're using a Cargo.toml to manage dependencies, just add persistent to the toml:
[dependencies.persistent]
git = "https://github.com/iron/persistent.git"Otherwise, cargo build, and the rlib will be in your target directory.
Along with the online documentation,
you can build a local copy with make doc.
One of us (@reem, @zzmp,
@theptrk, @mcreinhard)
is usually on #iron on the mozilla irc. Come say hi and ask any questions you might have.
We are also usually on #rust and #rust-webdev.