func uploadBufWithoutKeyDemo(r gio.Reader, key, uptoken string) {
// @gist uploadBufWithoutKey
var err error
var ret io.PutRet
var extra = &io.PutExtra{
// Params: params,
// MimeType: mieType,
// Crc32: crc32,
// CheckCrc: CheckCrc,
}
// ret 变量用于存取返回的信息，详情见 io.PutRet
// uptoken 为业务服务器端生成的上传口令
// r 为io.Reader类型，用于从其读取数据
// extra 为上传文件的额外信息,可为空， 详情见 io.PutExtra, 可选
err = io.PutWithoutKey(nil, &ret, uptoken, r, extra)
if err != nil {
//上传产生错误
log.Print("io.Put failed:", err)
return
}
//上传成功，处理返回值
log.Print(ret.Hash, ret.Key)
// @endgist
}
//upload user avatar
func UploadUserAvatarToQiniu(r io.ReadSeeker, filename string, mime string, bucketName string, user *models.User) error {
var ext string
// test image mime type
switch mime {
case "image/jpeg":
ext = ".jpg"
case "image/png":
ext = ".png"
case "image/gif":
ext = ".gif"
default:
ext = filepath.Ext(filename)
switch ext {
case ".jpg", ".png", ".gif":
default:
return fmt.Errorf("unsupport image format `%s`", filename)
}
}
// decode image
var err error
switch ext {
case ".jpg":
_, err = jpeg.Decode(r)
case ".png":
_, err = png.Decode(r)
case ".gif":
_, err = gif.Decode(r)
}
if err != nil {
return err
}
//reset reader pointer
if _, err := r.Seek(0, 0); err != nil {
return err
}
var data []byte
if data, err = ioutil.ReadAll(r); err != nil {
return err
}
if len(data) > setting.AvatarImageMaxLength {
return fmt.Errorf("avatar image size too large", filename)
}
//reset reader pointer again
if _, err := r.Seek(0, 0); err != nil {
return err
}
//save to qiniu
var uptoken = utils.GetQiniuUptoken(bucketName)
var putRet qio.PutRet
var putExtra = &qio.PutExtra{
MimeType: mime,
}
err = qio.PutWithoutKey(nil, &putRet, uptoken, r, putExtra)
if err != nil {
return err
}
//update user
user.AvatarKey = putRet.Key
if err := user.Update("AvatarKey", "Updated"); err != nil {
return err
}
return nil
}