chainmail 0.2.0

Strategy based authentication middleware for Iron framework
Documentation 
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use iron::prelude::*;
use std::error::Error;
use std::fmt;

#[derive(Debug)]
pub struct AuthError {
    msg: String
}

impl AuthError {
    pub fn new(msg: &str) -> AuthError {
        AuthError { msg: msg.to_owned() }
    }
}

impl fmt::Display for AuthError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "Authentication failed: {}", self.msg)
    }
}

impl Error for AuthError {
    fn description(&self) -> &str {
        &self.msg
    }

    fn cause(&self) -> Option<&Error> {
        None
    }
}

pub trait Strategy<U> {
    fn is_valid(&self, req: &mut Request) -> bool;
    fn authenticate(&self, req: &mut Request) -> Result<U, AuthError>;
}