import axios from 'axios'
import { BASE_URL } from './http'
import router from '../router'
?
// create an axios instance
const service = axios.create({
? baseURL: BASE_URL, // url = base url + request url
? // withCredentials: true, // send cookies when cross-domain requests
? timeout: 5000 // request timeout
})
?
?
// 設(shè)置請求次數(shù)，請求的間隙
service.defaults.retry = 4;
service.defaults.retryDelay = 1000;
?
// request interceptor
service.interceptors.request.use(
? config => {
? ? // do something before request is sent
? ? return config
? },
? error => {
? ? // do something with request error
? ? // console.log(error) // for debug
? ? return Promise.reject(error)
? }
)
?
// response interceptor
service.interceptors.response.use(
? response => {
? ? const res = response.data
? ? return res
? },
? error => {
? ? if (error.response) {
? ? ? // console.log('err' + error) // for debug
? ? ? switch (error.response.status) {
? ? ? ? case 401:
? ? ? ? ? // console.log('err status' + error.response.status)
? ? ? ? ? router.push('/login')
? ? ? ? ? break
? ? ? ? case 404:
? ? ? ? ? break
? ? ? ? case 500:
? ? ? ? ? break
? ? ? }
? ? ? return Promise.reject(error)
? ? } else {
? ? ? // 處理超時的情況
? ? ? let config = error.config
? ? ? // If config does not exist or the retry option is not set, reject
? ? ? if(!config || !config.retry) return Promise.reject(error)
??
? ? ? // Set the variable for keeping track of the retry count
? ? ? config.__retryCount = config.__retryCount || 0
??
? ? ? // Check if we've maxed out the total number of retries
? ? ? if(config.__retryCount >= config.retry) {
? ? ? ? // Reject with the error
? ? ? ? return Promise.reject(error)
? ? ? }
??
? ? ? // Increase the retry count
? ? ? config.__retryCount += 1
??
? ? ? // Create new promise to handle exponential backoff
? ? ? let backoff = new Promise(function(resolve) {
? ? ? ? setTimeout(function() {
? ? ? ? ? resolve()
? ? ? ? }, config.retryDelay || 1)
? ? ? })
??
? ? ? // Return the promise in which recalls axios to retry the request
? ? ? return backoff.then(function() {
? ? ? ? return service(config)
? ? ? })
? ? }
?
? }
)
?
export default service

//在main.js設(shè)置全局的請求次數(shù)，請求的間隙
axios.defaults.retry = 4;
axios.defaults.retryDelay = 1000;
?
axios.interceptors.response.use(undefined, function axiosRetryInterceptor(err) {
? ? var config = err.config;
? ? // If config does not exist or the retry option is not set, reject
? ? if(!config || !config.retry) return Promise.reject(err);
?
? ? // Set the variable for keeping track of the retry count
? ? config.__retryCount = config.__retryCount || 0;
?
? ? // Check if we've maxed out the total number of retries
? ? if(config.__retryCount >= config.retry) {
? ? ? ? // Reject with the error
? ? ? ? return Promise.reject(err);
? ? }
?
? ? // Increase the retry count
? ? config.__retryCount += 1;
?
? ? // Create new promise to handle exponential backoff
? ? var backoff = new Promise(function(resolve) {
? ? ? ? setTimeout(function() {
? ? ? ? ? ? resolve();
? ? ? ? }, config.retryDelay || 1);
? ? });
?
? ? // Return the promise in which recalls axios to retry the request
? ? return backoff.then(function() {
? ? ? ? return axios(config);
? ? });
});