axios重试机制解决方案

//在main.js设置全局的请求次数，请求的间隙

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);

 });

});