Detailed explanation of the steps to control routing permissions with react router4+redux-JS Tutorial-php.cn

This time I will bring you a detailed explanation of the steps to control routing permissions in react router4 redux. What are the precautions for controlling routing permissions in react router4 redux. The following is a practical case, let's take a look.

Overview

A complete routing system should look like this. When the component linked to is required to be logged in before it can be viewed, it must be able to jump to the login page. , and then after successful login, it will jump back to the page you wanted to visit before. Here we mainly use a permission control class to define routingrouting information, and at the same time use redux to save the routing address to be accessed after successful login. When the login is successful, check whether there is any in redux Save the address. If no address is saved, jump to the default routing address.

Routing permission control class

In this method, use sessionStorage to determine whether you are logged in. If you are not logged in, save the current route you want to jump to redux. in. Then jump to our login page.

import React from 'react'
import { Route, Redirect } from 'react-router-dom'
import { setLoginRedirectUrl } from '../actions/loginAction'
class AuthorizedRoute extends React.Component {
  render() {
    const { component: Component, ...rest } = this.props
    const isLogged = sessionStorage.getItem("userName") != null ? true : false;
    if(!isLogged) {
      setLoginRedirectUrl(this.props.location.pathname);
    }
    return (
        <Route {...rest} render={props => {
          return isLogged
              ? <Component {...props} />
              : <Redirect to="/login" />
        }} />
    )
  }
}
export default AuthorizedRoute

Copy after login

Routing definitionInformation

Routing information is also very simple. Only use AuthorizedRoute to define routes that need to be logged in to view.

import React from 'react'
import { BrowserRouter, Switch, Route, Redirect } from 'react-router-dom'
import Layout from '../pages/layout/Layout'
import Login from '../pages/login/Login'
import AuthorizedRoute from './AuthorizedRoute'
import NoFound from '../pages/noFound/NoFound'
import Home from '../pages/home/Home'
import Order from '../pages/Order/Order'
import WorkOrder from '../pages/Order/WorkOrder'
export const Router = () => (
    <BrowserRouter>
      <p>
        <Switch>
          <Route path="/login" component={Login} />
          <Redirect from="/" exact to="/login"/>{/*注意redirect转向的地址要先定义好路由*/}
          <AuthorizedRoute path="/layout" component={Layout} />
          <Route component={NoFound}/>
        </Switch>
      </p>
    </BrowserRouter>
)

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Login page

is to take out the address stored in redux. After successful login, jump to it. If not, jump to the default page. I This is the default to jump to the home page. Because the antd form is used, the code is a bit long. You only need to look at the two sentences connecting redux and the content in handleSubmit.

import React from 'react'
import './Login.css'
import { login } from '../../mock/mock'
import { Form, Icon, Input, Button, Checkbox } from 'antd';
import { withRouter } from 'react-router-dom';
import { connect } from 'react-redux'
const FormItem = Form.Item;
class NormalLoginForm extends React.Component {
  constructor(props) {
    super(props);
    this.isLogging = false;
  }
  handleSubmit = (e) => {
    e.preventDefault();
    this.props.form.validateFields((err, values) => {
      if (!err) {
        this.isLogging = true;
        login(values).then(() => {
          this.isLogging = false;
          let toPath = this.props.toPath === '' ? '/layout/home' : this.props.toPath
          this.props.history.push(toPath);
        })
      }
    });
  }
  render() {
    const { getFieldDecorator } = this.props.form;
    return (
        <Form onSubmit={this.handleSubmit.bind(this)} className="login-form">
          <FormItem>
            {getFieldDecorator('userName', {
              rules: [{ required: true, message: 'Please input your username!' }],
            })(
                <Input prefix={<Icon type="user" style={{ color: &#39;rgba(0,0,0,.25)&#39; }} />} placeholder="Username" />
            )}
          </FormItem>
          <FormItem>
            {getFieldDecorator('password', {
              rules: [{ required: true, message: 'Please input your Password!' }],
            })(
                <Input prefix={<Icon type="lock" style={{ color: &#39;rgba(0,0,0,.25)&#39; }} />} type="password" placeholder="Password" />
            )}
          </FormItem>
          <FormItem>
            {getFieldDecorator('remember', {
              valuePropName: 'checked',
              initialValue: true,
            })(
                <Checkbox>Remember me</Checkbox>
            )}
            <a className="login-form-forgot" href="">Forgot password</a>
            <Button type="primary" htmlType="submit" className="login-form-button"
                loading={this.isLogging ? true : false}>
              {this.isLogging ? 'Loging' : 'Login'}
            </Button>
            Or <a href="">register now!</a>
          </FormItem>
        </Form>
    );
  }
}
const WrappedNormalLoginForm = Form.create()(NormalLoginForm);
const loginState = ({ loginState }) => ({
  toPath: loginState.toPath
})
export default withRouter(connect(
    loginState
)(WrappedNormalLoginForm))

Copy after login

By the way, let’s talk about the use of redux here. For the time being, I will only basically use the method: define reducer, define actions, create store, and then connect redux when I need to use redux variables. When I need to dispatch to change the variables, I will directly introduce the methods in actions. , just call it directly. In order to match the event names in actions and reducer, I created an actionsEvent.js to store the event names for fear of typos and easy modification later.
reducer:

import * as ActionEvent from '../constants/actionsEvent'
const initialState = {
  toPath: ''
}
const loginRedirectPath = (state = initialState, action) => {
  if(action.type === ActionEvent.Login_Redirect_Event) {
    return Object.assign({}, state, {
      toPath: action.toPath
    })
  }
  return state;
}
export default loginRedirectPath

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actions:

import store from '../store'
import * as ActionEvent from '../constants/actionsEvent'
export const setLoginRedirectUrl = (toPath) => {
  return store.dispatch({
         type: ActionEvent.Login_Redirect_Event,
        toPath: toPath
       })
}

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Create store

import { createStore, combineReducers } from 'redux'
import loginReducer from './reducer/loginReducer'
const reducers = combineReducers({
  loginState: loginReducer //这里的属性名loginState对应于connect取出来的属性名
})
const store = createStore(reducers)
export default store

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I almost forgot to mention it, refer to the routing control class AuthorizedRoutehttps://codepen.io/bradwestfall/project/editor/XWNWge?preview_height=50&open_file=src/app.js Code here. I feel that this code is pretty good. I didn’t know how to do it at first, but I only had some ideas after I understood it.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!