md/src/api/fetch.js

import axios from "axios";

// 创建axios实例
const service = axios.create({
  baseURL: "",
  timeout: 30 * 1000, // 请求超时时间
});

service.interceptors.request.use(
  (config) => {
    if (/^(post)|(put)|(delete)$/i.test(config.method)) {
      if (config.data && config.data.upload) {
        config.headers["Content-Type"] = "multipart/form-data";
      }
    }
    return config;
  },
  (error) => {
    Promise.reject(error);
  }
);

service.interceptors.response.use(
  (res) => {
    return res.data ? res.data : Promise.reject(res);
  },
  (error) => Promise.reject(error)
);

export default service;