1. buf := new(bytes.Buffer)
    2. writer := multipart.NewWriter(buf)
    3. formFile, err := writer.CreateFormFile("file", "profile.yml")
    4. _, err = formFile.Write([]byte(file))
    5. if err != nil {
    6. return err
    7. }
    8. //一定要立即关闭，否则数据不会写进去
    9. writer.Close()
    11. req, err := http.NewRequest(transpond.Post, URL, buf)
    12. if err != nil {
    13. return err
    14. }
    15. req.Header.Set("Content-Type", writer.FormDataContentType()) //不能省略,并且一定要先执行writer.Close()
    16. req.Header.Add("X-Session-Token", common.Token)
    17. res, err := http.DefaultClient.Do(req)