tryFullStack/web/src/lib/api.ts

import axios from 'axios';
import { getToken, setToken } from './token';

export const api = axios.create({
  baseURL: process.env.NEXT_PUBLIC_API_BASE_URL,
});

api.interceptors.request.use((config) => {
  const t = getToken();
  if (t) {
    config.headers = config.headers ?? {};
    config.headers.Authorization = `Bearer ${t}`;

    return config;
  }

  if (config.headers && 'Authorization' in config.headers) {
    delete config.headers.Authorization;
  }

  return config;
});

api.interceptors.response.use(
  (res) => res,
  (error) => {
    const url: string | undefined = error?.config?.url;
    const isAuthRoute = url?.includes('/auth/login') || url?.includes('/auth/signup');
    if (error?.response?.status === 401 && typeof window !== 'undefined' && !isAuthRoute) {
      setToken(null); // 토큰 파기
      window.location.href = '/login'; // 전역 리다이렉트
    }

    return Promise.reject(error);
  },
);