RESTful 标准的axios封装（vue2.x）

export function ajax(url, params, type) {

  let config = { method: type || 'post' }

  if (type === 'get') {

    config.params = params

  } else if (type === 'put' || type === 'patch' || type === 'delete') {

    config.data = type ? {} : params

    config.headers = { 'Content-Type': 'application/x-www-form-urlencoded' }

    config.transformRequest = [

      () => {

        let ret = new URLSearchParams()

        for (let key in params) {

          ret.append(key, params[key])

        }

        return ret

      }

    ]

  } else {

    config.data = type ? {} : params

  }

  return instance(url, config).then(response => {

    return response.data

  })

}

instance.interceptors.response.use(

  res => {

    if (res.data.code) {

      switch (res.data.code) {

        case 401:

          Lockr.rm('token')

          window.location.href = '/#/admin/login/'

          break

      }

    } else {

    }

    return res

  },

  err => {

    if (err && err.response) {

      switch (err.response.status) {

        case 400:

          err.message = '请求错误'

          break

        case 401:

          err.message = '授权失败，请检查token'

          break

        case 403:

          err.message = '拒绝访问'

          break

        case 404:

          err.message = `请求${err.response.config.url

            .split('/')

            .pop()

            .replace(/\.html/, '')}接口出错`

          break

        case 408:

          err.message = '请求超时'

          break

        case 500:

          err.message = '服务器内部错误'

          break

        case 501:

          err.message = '服务未实现'

          break

        case 502:

          err.message = '网关错误'

          break

        case 503:

          err.message = '服务不可用'

          break

        case 504:

          err.message = '网关超时'

          break

        case 505:

          err.message = 'HTTP版本不受支持'

          break

        default:

      }

    }

    store.commit('setModal', err.message)

    return Promise.reject(err)

  }

)