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Table of Contents
React-based login
The first login
Second login
Code
login.jsx
actions
actionTypes
index
reducer
sagas
selector
Home Web Front-end JS Tutorial How to implement login in React? Detailed explanation of react login module

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

Sep 11, 2018 pm 04:29 PM
react

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:?"系統(tǒng)管理員",?roleType:?1,?userName:?"系統(tǒng)管理員"}
}

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)?{???//?判斷是否登陸
????????????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?(????????????<p className="login">
????????????????<p className="login-form">
????????????????????<p className="login-logo">
????????????????????????<span>React?Admin</span>
????????????????????</p>
????????????????????<Form onSubmit={this.handleSubmit} style={{maxWidth: &#39;300px&#39;}}>
????????????????????????<FormItem>
????????????????????????????{getFieldDecorator('userName',?{
????????????????????????????????rules:?[{required:?true,?message:?'請輸入用戶名!'}],
????????????????????????????})(????????????????????????????????<Input prefix={<Icon type="user" style={{fontSize: 13}}/>}
???????????????????????????????????????placeholder="管理員輸入admin,?游客輸入guest"/>
????????????????????????????)}????????????????????????</FormItem>
????????????????????????<FormItem>
????????????????????????????{getFieldDecorator('password',?{
????????????????????????????????rules:?[{required:?true,?message:?'請輸入密碼!'}],
????????????????????????????})(????????????????????????????????<Input prefix={<Icon type="lock" style={{fontSize: 13}}/>}?type="password"
???????????????????????????????????????placeholder="管理員輸入admin,?游客輸入guest"/>
????????????????????????????)}????????????????????????</FormItem>
????????????????????????<FormItem>
????????????????????????????{getFieldDecorator('remember',?{
????????????????????????????????valuePropName:?'checked',
????????????????????????????????initialValue:?true,
????????????????????????????})(????????????????????????????????<Checkbox>記住我</Checkbox>
????????????????????????????)}????????????????????????????<a className="login-form-forgot" href="" style={{float: &#39;right&#39;}}>忘記密碼</a>
????????????????????????????<Button type="primary" htmlType="submit" className="login-form-button"
                                    style={{width: &#39;100%&#39;}}>
????????????????????????????????登錄????????????????????????????</Button>
????????????????????????????或?<a href="">現(xiàn)在就去注冊!</a>
????????????????????????????<p>
????????????????????????????????<Icon type="github" onClick={this.gitHub}/>(第三方登錄)????????????????????????????</p>
????????????????????????</FormItem>
????????????????????</Form>
????????????????</p>
????????????</p>
????????);
????}
}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?(????????<Bundle load={() =>?import("./lazy")}>
????????????{(View)?=>?{????????????????return?<View {...props}/>
????????????}}????????</Bundle>
????);
};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 &#39;reselect&#39;;const getCompLoginData = (state) => state.compLoginData;export const 
selectVisibleMenuResourceTreeTable = createSelector(
    [getCompLoginData],
    (compLoginData) => compLoginData
);

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