如何将Promise与redux和socket.io一起使用

// 安装redux和socket.io相关依赖
// npm install redux socket.io-client redux-thunk

import { createStore, applyMiddleware } from 'redux';
import thunk from 'redux-thunk';
import io from 'socket.io-client';

// 创建socket连接
const socket = io('http://localhost:3000');

// 定义action类型
const FETCH_DATA = 'FETCH_DATA';
const RECEIVE_DATA = 'RECEIVE_DATA';

// 定义action创建函数
const fetchData = () => ({
  type: FETCH_DATA
});

const receiveData = (data) => ({
  type: RECEIVE_DATA,
  payload: data
});

// 定义异步action
const fetchDataAsync = () => {
  return (dispatch) => {
    dispatch(fetchData());

    // 发送socket.io请求
    socket.emit('fetchData');

    // 监听socket.io响应
    socket.on('receiveData', (data) => {
      dispatch(receiveData(data));
    });
  };
};

// 定义reducer
const initialState = {
  loading: false,
  data: null
};

const reducer = (state = initialState, action) => {
  switch (action.type) {
    case FETCH_DATA:
      return {
        ...state,
        loading: true
      };
    case RECEIVE_DATA:
      return {
        ...state,
        loading: false,
        data: action.payload
      };
    default:
      return state;
  }
};

// 创建store并应用中间件
const store = createStore(reducer, applyMiddleware(thunk));

// 在组件中使用
store.dispatch(fetchDataAsync());