Json Web Token Interceptor for VueJS

JwtInterceptor.js

import Auth from '../../modules/Auth';

const LOGIN_NAMED_ROUTE = 'login';
const EXPIRED_ERROR = 'token_expired';

export default function () {
  return {
    request: (request) => {
      let token = Auth.token();

      if(!token) {
        this.$router.go(LOGIN_NAMED_ROUTE);
      } else {
        request.headers['Authorization'] = 'Bearer ' + Auth.token();
      }

      return request;
    },
    response: (response) => {
      let request = response.request;

      switch(response.status) {
        case 401:
          if(response.data.error === EXPIRED_ERROR) {
            return Auth.refresh(this, () => {
              return this.$http.get(request.root).then((response) => {
                return response;
              });
            });
          }
        case 400:
          this.$router.go(LOGIN_NAMED_ROUTE);
      }

      return response;
    },
  }
};