How to get current route in react-router 2.0.0-rc5

I have a router like below:

<Router history={hashHistory}>
    <Route path="/" component={App}>
        <IndexRoute component={Index}/>
        <Route path="login" component={Login}/>
    </Route>
</Router>

Here's what I want to achieve :

1. Redirect user to /login if not logged in
2. If user tried to access /login when they are already logged in, redirect them to root /

so now I'm trying to check user's state in App's componentDidMount, then do something like:

if (!user.isLoggedIn) {
    this.context.router.push('login')
} else if(currentRoute == 'login') {
    this.context.router.push('/')
}

The problem here is I can't find the API to get current route.

I found this closed issue suggested using Router.ActiveState mixin and route handlers, but it looks like these two solutions are now deprecated.

After reading some more document, I found the solution:

https://github.com/ReactTraining/react-router/blob/master/packages/react-router/docs/api/location.md

I just need to access the injected property location of the instance of the component like:

var currentLocation = this.props.location.pathname

You can get the current route using

const currentRoute = this.props.routes[this.props.routes.length - 1];

...which gives you access to the props from the lowest-level active <Route ...> component.

Given...

<Route path="childpath" component={ChildComponent} />

currentRoute.path returns 'childpath' and currentRoute.component returns function _class() { ... }.

If you use the history,then Router put everything into the location from the history,such as:

this.props.location.pathname;
this.props.location.query;

get it?

As of version 3.0.0, you can get the current route by calling:

this.context.router.location.pathname

Sample code is below:

var NavLink = React.createClass({
    contextTypes: {
        router: React.PropTypes.object
    },

    render() {   
        return (
            <Link {...this.props}></Link>
        );
    }
});