mzabriskie/axios

httpClient.interceptors.response.use(
  response => response,
  error => {
    const isTokenRefreshing = 'isTokenRefreshing';
    const { response: { status, data: { key } }, config } = error;
    const isValidRefreshToken = !localStorage.getItem(isTokenRefreshing) && 
                                  status === UNAUTHORIZED_CODE &&
                                  key === REFRESH_KEY
    console.log("isTokenRefreshing", localStorage.getItem(isTokenRefreshing))
    console.log("status: ", status, " key: ", key)
    if (isValidRefreshToken) {
      localStorage.setItem(isTokenRefreshing, true);
      return  httpClient.post('fresh_token').then(() => {
        localStorage.removeItem(isTokenRefreshing)
        return httpClient(config);
      }).catch( error => {
        localStorage.removeItem(isTokenRefreshing)
        localStorage.removeItem('login');
        window.location.replace('/login');
        return Promise.resolve(error);
      });
    }

    // while(localStorage.getItem(isTokenRefreshing)) {
    //   console.log('refreshing')
    // }

    if(status === UNAUTHORIZED_CODE && key === REFRESH_KEY){
      localStorage.removeItem(isTokenRefreshing)
      return httpClient(config);
    }

    return Promise.reject(error);
  }
);