从通过React Router设置的路由访问Redux Store

Question

我想利用react-router的onEnter处理程序来提示用户在进入受限路由时进行身份验证.

到目前为止,我的routes.js文件看起来像这样:

import React from 'react';
import { Route, IndexRoute } from 'react-router';

export default (
    <Route   path="/"         component={App}>
      <IndexRoute             component={Landing} />
      <Route path="learn"     component={Learn} />
      <Route path="about"     component={About} />
      <Route path="downloads" component={Downloads} onEnter={requireAuth} />
    </Route>
)

理想情况下,我希望我的requireAuth函数是一个可以访问商店和当前状态的redux动作,就像这样:store.dispatch(requireAuth()).

不幸的是,我无法访问此文件中的商店.connect在这种情况下,我认为我不能真正使用它来访问我想要的相关操作.我也不能只import store从创建商店的文件中获取,因为在应用程序首次加载时这是未定义的.

Answer 1

实现此目的的最简单方法是将商店传递给返回路线的功能(而不是直接返回路线).这样您就可以访问商店onEnter和其他反应路由器方法.

所以对于你的路线:

import React from 'react';
import { Route, IndexRoute } from 'react-router';

export const getRoutes = (store) => (
  const authRequired = (nextState, replaceState) => {
    // Now you can access the store object here.
    const state = store.getState();

    if (!state.user.isAuthenticated) {
      // Not authenticated, redirect to login.
      replaceState({ nextPathname: nextState.location.pathname }, '/login');
    }
  };

  return (
    <Route   path="/"         component={App}>
      <IndexRoute             component={Landing} />
      <Route path="learn"     component={Learn} />
      <Route path="about"     component={About} />
      <Route path="downloads" component={Downloads} onEnter={authRequired} />
    </Route>
  );
)

然后更新你的主要组件来调用该getRoutes函数,传入商店:

<Provider store={ store }>
  <Router history={ history }>
    { getRoutes(store) }
  </Router>
</Provider>

至于调度动作requireAuth,您可以像这样编写函数:

const authRequired = (nextState, replaceState, callback) => {
  store.dispatch(requireAuth())  // Assume this action returns a promise
    .then(() => {
      const state = store.getState();

      if (!state.user.isAuthenticated) {
        // Not authenticated, redirect to login.
        replaceState({ nextPathname: nextState.location.pathname }, '/login');
      }

      // All ok
      callback();
    });
};

希望这可以帮助.

Answer 2

如果你想要,你可以像这样写route.js:

var requireAuth = (store, nextState, replace) => {
  console.log("store: ", store);
  //now you have access to the store in the onEnter hook!
}

export default (store) => {
  return (
      <Route path="/"           component={App}>
        <IndexRoute             component={Landing} />
        <Route path="learn"     component={Learn} />
        <Route path="about"     component={About} />
        <Route path="downloads" component={Downloads} onEnter={requireAuth.bind(this, store)} />
      </Route>
    );
);

我已经设置了一个你可以在这个codepen中玩的例子.

不确定是否触发动作以处理身份验证是一个好主意.我个人更喜欢以不同的方式处理auth :

而不是使用的onEnter钩,我用一个包装功能部件.我希望我的博客的管理部分受到保护,因此我AdminContainer使用函数将组件包装在路由中requireAuthentication,如下所示.

export default (store, history) => {
        return (
            <Router history={history}>
                <Route path="/" component={App}>
                    { /* Home (main) route */ }
                    <IndexRoute component={HomeContainer}/>
                    <Route path="post/:slug" component={PostPage}/>
                    { /* <Route path="*" component={NotFound} status={404} /> */ }
                </Route>

                <Route path="/admin" component={requireAuthentication(AdminContainer)}>
                    <IndexRoute component={PostList}/>
                    <Route path=":slug/edit" component={PostEditor}/>
                    <Route path="add" component={PostEditor}/>
                </Route>
                <Route path="/login" component={Login}/>
            </Router>
        );
    };

requireAuthentication 是一个功能

• 如果用户通过身份验证,则呈现包装的组件,
• 否则重定向到 Login

你可以在下面看到它:

export default function requireAuthentication(Component) {
    class AuthenticatedComponent extends React.Component {

        componentWillMount () {
            this.checkAuth();
        }

        componentWillReceiveProps (nextProps) {
            this.checkAuth();
        }

        checkAuth () {
            if (!this.props.isAuthenticated) {
                let redirectAfterLogin = this.props.location.pathname;
                this.context.router.replace({pathname: '/login', state: {redirectAfterLogin: redirectAfterLogin}});
            }
        }

        render () {
            return (
                <div>
                    {this.props.isAuthenticated === true
                        ? <Component {...this.props}/>
                        : null
                    }
                </div>
            )

        }
    }

    const mapStateToProps = (state) => ({
        isAuthenticated: state.blog.get('isAuthenticated')
    });

    AuthenticatedComponent.contextTypes = {
        router: React.PropTypes.object.isRequired
    };

    return connect(mapStateToProps)(AuthenticatedComponent);
}

此外,requireAuthentication将保护所有路线/admin.您可以随时随地重复使用它.