persistent [](https://travis-ci.org/iron/persistent)
====
> Persistent storage as middleware for the [Iron](https://github.com/iron/iron) web framework.
## Example
```rust
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);
}
```
## Overview
persistent is a part of Iron's [core bundle](https://github.com/iron/core).
- Share persistent data across requests
- Read or modify locally stored data
## Installation
If you're using a `Cargo.toml` to manage dependencies, just add persistent to the toml:
```toml
[dependencies.persistent]
git = "https://github.com/iron/persistent.git"
```
Otherwise, `cargo build`, and the rlib will be in your `target` directory.
## [Documentation](http://ironframework.io/doc/persistent)
Along with the [online documentation](http://ironframework.io/doc/persistent),
you can build a local copy with `make doc`.
## [Examples](/examples)
## Get Help
One of us ([@reem](https://github.com/reem/), [@zzmp](https://github.com/zzmp/),
[@theptrk](https://github.com/theptrk/), [@mcreinhard](https://github.com/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`.