Question

我正在尝试制作一些中间件，如果它已经过期，它会刷新我的JWT。我目前有这个中间件：

events.js:160
      throw er; // Unhandled 'error' event
      ^

TypeError: Cannot convert undefined or null to object
    at C:\Users\S\Desktop\insta\back\server.js:43:24
    at Query.<anonymous> (C:\Users\S\Desktop\insta\back\node_modules\mongoose\li
b\model.js:3800:16)
    at C:\Users\S\Desktop\insta\back\node_modules\kareem\index.js:277:21
    at C:\Users\S\Desktop\insta\back\node_modules\kareem\index.js:131:16
    at _combinedTickCallback (internal/process/next_tick.js:73:7)
    at process._tickCallback (internal/process/next_tick.js:104:9)

我希望调用refreshToken（）函数来启动进程，但到目前为止，即使是refreshToken中的console.log（）也没有调用：

import { isTokenExpired, refreshToken } from '../modules/auth/auth.service'
export const jwt = store => next => action => {
    if (typeof action === 'function') {
      console.log("Middleware triggered:", action);
      var theState = store.getState();
      if (theState.auth && theState.auth.authToken && isTokenExpired(theState.auth.authToken)) {
        console.log('This is logging')
        //this function is not being called
        refreshToken(theState.auth.refreshToken);
      }
    }
    return next(action)
}

此外，在刷新令牌时，refreshToken函数内部将是异步的。我想在reducer中设置一个“REFRESH_TOKEN_PENDING”类型，一旦收到响应，就将“REFRESH_TOKEN_SUCCESS”发送给reducer。中间件可以实现吗？

由于

Answer 1

您必须发送 refreshToken()。如果您有权访问dispatch() jwt功能，则应将其称为dispatch(refreshToken())。

考虑到我不确定您是如何触发jwt操作的，我认为这是一个有效解决方案，可以轻松触发操作中的中间件功能：

// ================
//  Container file
// ================
import {connect} from "react-redux";
import { bindActionCreators } from "redux";
// ... other 

function mapActionsToProps(dispatch) {
  return bindActionCreators({
    jwt: path_to_actions_file.jwt
}, dispatch)}

const mapStateToProps = (state) => ({
  // ... your state properties
});

export default connect(mapStateToProps, mapActionsToProps)(YourComponent); // <== YourComponent has to be a React Component

// ==============
//  Actions file
// ==============
export const setConvertTypeActive = store => dispatch => {
  console.log('This is logging.');
  dispatch(refreshToken("md5Token"));
}

export const refreshToken = refreshToken => dispatch => {
  console.log('Should log now.');
}

关于你的上一个问题，是的，你可以创建类似于refreshToken动作的中间件来设置减速器的一些状态。检查以下代码：

// ============== 
//  Actions file
// ==============
export const refreshToken= {
  pending: () => ({
    // "REFRESH_TOKEN_PENDING"
  }),
  success: (data) => ({
    // "REFRESH_TOKEN_SUCCESS"
  })  
};

Redux中间件内部的功能无法正常工作

1 个答案: