本文例項講述了golang實現的檔案上傳與檔案下載功能。分享給大家供大家參考，具體如下：

upload.go

複製程式碼 程式碼如下:package common
import (
"io/ioutil"
"os"
"path"
"github.com/gin-gonic/gin"
"googo.co/goo"
"googo.co/utils"
)
const (
UPLOAD_DIR = "static/"
)
type Upload struct {
}
func (this Upload) DoHandle(c *gin.Context) *goo.Result {
fh,err := c.FormFile("file")

if err != nil {
return goo.Err(700,"上傳失敗："+err.Error(),err.Error())
}
f,err := fh.Open()
if err != nil {
return goo.Err(701,err.Error())
}
defer f.Close()
bytes,err := ioutil.ReadAll(f)
if err != nil {
return goo.Err(702,err.Error())
}
md5File := utils.MD5(bytes)
fpath := md5File[0:2] + "/" + md5File[2:4] + "/"
if err := os.MkdirAll(UPLOAD_DIR+fpath,0755); err != nil {
return goo.Err(703,err.Error())
}
fname := fpath + md5File[8:24] + path.Ext(fh.Filename)
fw,err := os.Create(UPLOAD_DIR + fname)
if err != nil {
return goo.Err(704,err.Error())
}
defer fw.Close()
if _,err := fw.Write(bytes); err != nil {
return goo.Err(705,err.Error())
}
return goo.Succ(gin.H{
"url": "/file/" + fname,
})
}

複製程式碼 程式碼如下:// 上傳檔案
r.POST("/upload",goo.Handler(common.Upload{}))
// 下載檔案
r.StaticFS("/file",http.Dir("./static"))
// 訪問
http://localhost:18000/file/ab/cd/efghijk.png

希望本文所述對大家Go語言程式設計有所幫助。