How to implement login in React? Detailed explanation of react login module

This article mainly introduces the login module of react, and introduces the login situation of react in detail. Now let us take a look at the text of the article

React-based login

The first login

• Login page submission login handleSubmit(), medium Make API requests directly. After successful login request, jump to history.push(nextPathname, null);

• For the implementation method, please refer to http://blog.csdn.net/qq_27384769/article/details/78775835

Second login

• After the Login page submits login handleSubmit(), an asynchronous request is initiated through saga.

• After the request is successful, initiate an action and call the reducer. Reload the Login page.

• In the Login page life cycle componentWillReceiveProps verifies the login information request to jump.

The following is an explanation of the second login method

reducer Data structure in

auth:{
	type: "COMPLOGIN/RECEIVE_DATA", 
	isFetching: false, 
	data: {uid: 1, permissions: Array(5), role: "系统管理员", roleType: 1, userName: "系统管理员"}
}

Code

login.jsx

• componentWillReceiveProps login Adjust after success

• handleSubmit handles submission login

import React from 'react';import {Form, Icon, Input, Button, Checkbox} from 'antd';import {connect} from 'react-redux';import {bindActionCreators} from 'redux';import {findData, receiveData} from '../actions';import {selectVisibleMenuResourceTreeTable} from '../selector';const FormItem = Form.Item;class Login extends React.Component {    componentWillMount() {        const {receiveData} = this.props;        receiveData(null, 'auth');
    }    componentWillReceiveProps(nextProps) {        const {auth: nextAuth = {}} = nextProps;        if (nextAuth.data && nextAuth.data.uid) {   // 判断是否登陆
            localStorage.setItem('user', JSON.stringify(nextAuth.data));            this.props.history.push('/', null);
        }
    }    handleSubmit = (e) => {        e.preventDefault();        this.props.form.validateFields((err, values) => {            if (!err) {                console.log('Received values of form: ', values);                const {findData} = this.props;                if (values.userName === 'admin' && values.password === 'admin') findData({
                    funcName: 'admin',
                    stateName: 'auth'
                });                if (values.userName === 'guest' && values.password === 'guest') findData({
                    funcName: 'guest',
                    stateName: 'auth'
                });
            }
        });
    };    gitHub = () => {        console.log("gitHub");
    };    render() {        const {getFieldDecorator} = this.props.form;        return (            434e1358c9378ac3fd33b911e780149e
                b2394c444f081e0017d1642dfc84f1f8
                    c92ea6d2badfaeb250216ed853bbdbb2
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                    94b3e26ee717c64999d7867364b1b4a3
                    184b34f4f105d6516fe712766a9e325a
                        b991a1338e3038b10035bb6940ac6193
                            {getFieldDecorator('userName', {
                                rules: [{required: true, message: '请输入用户名!'}],
                            })(                                501c34e1e18ea140ee629fc657f756aa}
                                       placeholder="管理员输入admin, 游客输入guest"/>
                            )}                        ef807bb895304b2f6a1f66b2641ea569
                        b991a1338e3038b10035bb6940ac6193
                            {getFieldDecorator('password', {
                                rules: [{required: true, message: '请输入密码!'}],
                            })(                                a702425267d3239dc21f20d5c644eaaf} type="password"
                                       placeholder="管理员输入admin, 游客输入guest"/>
                            )}                        ef807bb895304b2f6a1f66b2641ea569
                        b991a1338e3038b10035bb6940ac6193
                            {getFieldDecorator('remember', {
                                valuePropName: 'checked',
                                initialValue: true,
                            })(                                69393f9a46ae20607b893bed10218172记住我fc4d79e34ad347b99c684660ce4ccba3
                            )}                            cca3a973c05f7502e090180a02c32514忘记密码5db79b134e9f6b82c0b36e0489ee08ed
                            95b3f5ad236f0c0143abd915a9cd3964
                                登录                            a1cb88e6789f399807801ea3799938af
                            或 6170e8999ab19ec641e0422470b16d5c现在就去注册!5db79b134e9f6b82c0b36e0489ee08ed
                            e388a4556c0f65e1904146cc1a846bee
                                7baa8ae66257a5658535c02e56eb333a(第三方登录)                            94b3e26ee717c64999d7867364b1b4a3
                        ef807bb895304b2f6a1f66b2641ea569
                    70a2c5d410e290aa58cb7e59d41eaf55
                94b3e26ee717c64999d7867364b1b4a3
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        );
    }
}const mapStateToPorps = state => {    return {
        auth: selectVisibleMenuResourceTreeTable(state)
    }
};const mapDispatchToProps = dispatch => ({
    findData: bindActionCreators(findData, dispatch),
    receiveData: bindActionCreators(receiveData, dispatch)
});export default Form.create()(connect(mapStateToPorps, mapDispatchToProps)(Login));

actions

• findData Click the button to initiate a request

• requestData Before calling the API

• requestData Call the API to obtain To data

import * as type from './actionTypes';export const findData = (data) => {    let {funcName, stateName} = data;    return {
        type: type.COMP_LOGIN_FIND_DATA,
        funcName,
        stateName
    }
}export const requestData = category => ({
    type: type.COMP_LOGIN_REQUEST_DATA,
    category
});export const receiveData = (data, category) => ({
    type: type.COMP_LOGIN_RECEIVE_DATA,
    data,
    category
});

actionTypes

export const COMP_LOGIN_FIND_DATA = 'COMPLOGIN/FIND_DATA';export const COMP_LOGIN_REQUEST_DATA = 'COMPLOGIN/REQUEST_DATA';export const COMP_LOGIN_RECEIVE_DATA = 'COMPLOGIN/RECEIVE_DATA';

index

import React from 'react';import Bundle from '../../../bundle/views/bundle';import * as actions from './actions';const view = (props) => {    return (        42c9814113858c7668de4a776bc31ec5 import("./lazy")}>
            {(View) => {                return 2fb732b7199e4f5e49a9d32783267755
            }}        2075647a73e9b735dd611345836fffdd
    );
};export {actions, view};

lazy Asynchronous loading

• #Load the data structure in the corresponding sagas\reducer\view

• #reducer according to the component: [compLoginName]: compLoginReducer

import compLoginSagas from './sagas';import compLoginReducer from './reducer';import view from './views/Login';import {UumsCompsReducerNames} from '../../constants';const compLoginName = UumsCompsReducerNames.compLogin;const reducer = {
    [compLoginName]: compLoginReducer
};const sagas = {
    [compLoginName]: compLoginSagas
};export {sagas, reducer, view};

reducer

• Pure function

export default (state = {}, action) => {    const {type} = action;    switch (type) {        case types.COMP_LOGIN_REQUEST_DATA: {            return {                ...state, type: type, isFetching: true
            }
        }        case types.COMP_LOGIN_RECEIVE_DATA:            return {...state, type: type,isFetching: false, data: action.data};        default:            return {...state};
    }
}

sagas

Asynchronous call

import * as http from '../axios/index';import {call, put, takeLatest} from 'redux-saga/effects';import {requestData, receiveData} from './actions';import {COMP_LOGIN_FIND_DATA} from './actionTypes';export const fetchData = ({funcName, params}) => {    return http[funcName](params).then(res => {        return res;
    });
};function* fetchLoginInfo(data) {    try {        let {stateName} = data;        yield put(requestData());        const result = yield call(fetchData, data);        yield put(receiveData(result, stateName));
    } catch (e) {        console.log(e);
    }
}function* sagas() {    yield takeLatest(COMP_LOGIN_FIND_DATA, fetchLoginInfo);
}export default sagas;

selector

Memory component selector

import {createSelector} from 'reselect';const getCompLoginData = (state) => state.compLoginData;export const 
selectVisibleMenuResourceTreeTable = createSelector(
    [getCompLoginData],
    (compLoginData) => compLoginData
);

This article ends here (if you want to see more, go to the PHP Chinese websiteReact User Manual column), if you have any questions, you can leave a message below.

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