Redirect using react-router in redux middleware

问题:

I've created a middleware that checks if a request returns an invalid access response. If the status is a 401, I want to redirect the user to the login page

Here's the middleware code

import React from 'react';
import { push, replace } from 'react-router-redux';

const auth_check = ({ getState }) =>  {
  return (next) => (action) => {
    if(action.payload != undefined && action.payload.status==401){
        push('login');
        console.log('session expired'); 
    }
    // Call the next dispatch method in the middleware chain.
    let returnValue = next(action);

    return returnValue
  }
}

export default auth_check;

Including it in index.js

...

const store = createStore(reducers, undefined, 
            compose(
                applyMiddleware(promise,auth_check)
                )
            );
const history = syncHistoryWithStore(browserHistory, store);

ReactDOM.render(
  <Provider store={store}>
    <Router history={history} routes={routes} />
  </Provider>
  , document.querySelector('.app'));

The push method does not redirect the page. I am sure that the code goes through that section since the log is showing

回答1:

if you prefer Redux style actions, the library also provides a set of action creators and a middleware to capture them and redirect them to your history instance.

for: push(location), replace(location), go(number), goBack(), goForward()

You must install routerMiddleware for these action creators to work.

import { routerMiddleware, push } from 'react-router-redux'

// Apply the middleware to the store
const middleware = routerMiddleware(browserHistory)
const store = createStore(
  reducers,
  applyMiddleware(middleware)
)

// Dispatch from anywhere like normal.
store.dispatch(push('/foo'))

Also React Router provides singleton versions of history (browserHistory and hashHistory) that you can import and use from anywhere in your application.

import { browserHistory } from 'react-router'

if(action.payload != undefined && action.payload.status==401){
        browserHistory.push('login');
        console.log('session expired'); 
}

btw for check auth you may use onEnter or redux-auth-wrapper

回答2:

use onEnter method of react-router. call a function which will check for the access. Example:

function checkAccess() {
   //some logic to check 
    if(notAuthorized){ window.location.href= "/login"; }
  }