问题
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
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;
回答1:
If you want to use interceptors to handle 401 error here is code snippet.
axios.interceptors.response.use(response => {
return response;
}, error => {
if (error.response.status === 401) {
//place your reentry code
}
return error;
});
回答2:
I got it working with following code
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;
[EDIT] Its 2019, Here is yet another implementation for the same. The above solution is great but does not work well with multiple failed request, in turn it calls getToken with the updated token as well.
import axios from "axios";
/* @internal */
import config from "../config";
import TokenService from "./token_service";
class Request {
constructor() {
this.baseURL = config.baseUrl;
this.isRefreshing = false;
this.failedRequests = [];
this.tokenService = new TokenService();
this.client = axios.create({
baseURL: config.apiServerBaseUrl,
headers: {
clientSecret: this.clientSecret,
},
});
this.beforeRequest = this.beforeRequest.bind(this);
this.onRequestFailure = this.onRequestFailure.bind(this);
this.processQueue = this.processQueue.bind(this);
this.client.interceptors.request.use(this.beforeRequest);
this.client.interceptors.response.use(this.onRequestSuccess,
this.onRequestFailure);
}
beforeRequest(request) {
const token = TokenService.getAccessToken();
request.headers.Authorization = `Token ${token}`;
return request;
}
static onRequestSuccess(response) {
return response.data;
}
async onRequestFailure(err) {
const { response } = err;
if (response.status === 401 && err && err.config && !err.config.__isRetryRequest) {
if (this.isRefreshing) {
try {
const token = await new Promise((resolve, reject) => {
this.failedRequests.push({ resolve, reject });
});
err.config.headers.Authorization = `Bearer ${token}`;
return this.client(err.config);
}
catch (e) {
return e;
}
}
this.isRefreshing = true;
err.config.__isRetryRequest = true;
return new Promise((resolve, reject) => {
this.tokenService.refreshAccessToken().then((token) => {
this.tokenService.setAccessToken(token);
err.config.headers.Authorization = `Bearer ${token}`;
this.isRefreshing = false;
this.processQueue(null, token);
resolve(this.client(err.config));
}).catch((e) => {
this.processQueue(e, null);
reject(err.response);
});
});
}
throw response;
}
processQueue(error, token = null) {
this.failedRequests.forEach((prom) => {
if (error) {
prom.reject(error);
} else {
prom.resolve(token);
}
});
this.failedRequests = [];
}
}
const request = new Request();
export default request.client;
来源：https://stackoverflow.com/questions/47216452/how-to-handle-401-authentication-error-in-axios-and-react