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