如何在axios中处理401（Authentication Error）并做出反应？

问题描述

我有一个文件request.js，其中包含axios ajax请求的包装器。我从多个反应组件调用请求函数，当其中一个请求失败时，我想刷新令牌并再次重试所有失败的请求。我可以使用拦截器，但我不知道如何实现它。请帮忙。

I have one file request.js which contains wrapper for axios ajax request. I am calling request function from multiple react components and when one of the request fails I want to refresh the token and retry all the failed requests again. I can use intercepters, but I don't know how to implement it. Please help.

request.js

request.js

 var client = axios.create({
   baseURL: 'http://192.168.1.3:3000',
     headers: {
     appID: 8,
     version: "1.1.0",
     empID: localStorage.getItem('empID'),
     token: localStorage.getItem('accessToken')
    }
 });

 const request = function(options) {
 const onSuccess = function(response) {
 console.debug('Request Successful!', response);
 return response.data;
 }
 const onError = function(error) {
    console.error('Request Failed:', error.config);
    if (error.response) {
     console.error('Status:',  error.response.status);
     console.error('Data:',    error.response.data);
     console.error('Headers:', error.response.headers);
    } else {
   console.error('Error Message:', error.message);
 }

  return Promise.reject(error.response || error.message);
 }

 return client(options)
         .then(onSuccess)
         .catch(onError);
         options
 }

 export default request;

推荐答案

我使用以下代码

import axios from 'axios';
import config from '../../configuration.json';
import qs from 'qs';

const baseURL = config['baseUrl_local'];
let authTokenRequest;

/**
  * @description axios instance for ajax requests
*/

var client = axios.create({
baseURL: baseURL,
headers: {
    appID: 8,
    version: "1.1.0",
    empID: localStorage.getItem('empID'),
    token: localStorage.getItem('accessToken')
}
});

/**
 * @description this method calls a requestNewToken method to issue a
 new token to the client
*/

 function getAuthToken() {
   if (!authTokenRequest) {
   authTokenRequest = requestNewToken();
   authTokenRequest.then(resetAuthTokenRequest, resetAuthTokenRequest);
 }
 return authTokenRequest;
 }

/**
  * @description this method requests the server to issue a new token,
  the server response is updated in local storage accessToken
*/

function requestNewToken() {
  var newToken = request({
  method: "post",
  url: '/sign-in',
  data:  qs.stringify({
         "userName":localStorage.getItem('userName'),
         "password":localStorage.getItem('password')
         })
  }).then((res)=>{
  if(res.status == "success"){
    localStorage.setItem('accessToken',res.data.accessToken);
    //if featureArray is present in response object, update the
    featureArray in local storage
    if(res.data.features){
      localStorage.setItem(
      'featureArray',
     JSON.stringify(res.data.features));
    }
    client = axios.create({
     baseURL: baseURL,
     headers: {
          appID: 8,
          version: "1.1.0",
          empID: localStorage.getItem('empID'),
          token: localStorage.getItem('accessToken')
      }
   });
 } else {
  window.location = "/logout";
 }
});
 return newToken;
}

function resetAuthTokenRequest() {
  authTokenRequest = null;
 }

/**
  * @description if any of the API gets 401 status code, this method
   calls getAuthToken method to renew accessToken
  * updates the error configuration and retries all failed requests
  again
*/

client.interceptors.response.use(undefined, err => {
  const error = err.response;
  // if error is 401
  if (error.status===401 && error.config &&
  !error.config.__isRetryRequest) {
  // request for a new token
  return getAuthToken().then(response => {
   // update the error config with new token
   error.config.__isRetryRequest = true;
   error.config.headers.token= localStorage.getItem("accessToken");
   return client(error.config);
  });
 }
});

/**
 * @description wrapper for making ajax requests
 * @param {object} object with method,url,data etc.
*/

const request = function(options) {
  const onSuccess = function(response) {
    return response.data;
  }
 const onError = function(error) {
  //console.error('Request Failed:', error.config);
   if (error.response) {
  //console.error('Status:',  error.response.status);
  //console.error('Data:',    error.response.data);
  //console.error('Headers:', error.response.headers);
  } else {
  console.error('Error Message:', error.message);
  }
 return Promise.reject(error.response || error.message);
 }

return client(options)
        .then(onSuccess)
        .catch(onError);
        options
}

export default request;

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