golang七牛云上传demo

封装

package qiniu

import (
	"context"
	"io"

	"github.com/qiniu/api.v7/v7/auth/qbox"
	"github.com/qiniu/api.v7/v7/storage"
)

const (
	accessKey = ""
	secretKey = ""
	bucket    = ""
)

func config() (cfg storage.Config) {

	cfg = storage.Config{}
	// 设置机房
	cfg.Zone = &storage.ZoneHuanan
	// 是否使用https
	cfg.UseHTTPS = false
	// 是否使用CDN上传加速
	cfg.UseCdnDomains = false

	return
}

func Upload(file io.Reader, filename string, size int64) (string, error) {

	putPolicy := storage.PutPolicy{
		Scope: bucket,
	}

	mac := qbox.NewMac(accessKey, secretKey)
	upToken := putPolicy.UploadToken(mac)

	cig := config()
	formUploader := storage.NewFormUploader(&cig)

	ret := storage.PutRet{}
	putExtra := storage.PutExtra{}
	err := formUploader.Put(context.Background(), &ret, upToken, filename, file, size, &putExtra)

	if err != nil {
		return "", err
	}

	return ret.Key, nil
}

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使用

		f, h, err := this.GetFile("audio")
		if err != nil {
			this.renderUnknownErrorJSON("上传失败", nil)
			return
		}
		defer f.Close()

		file, _ := h.Open() // 返回值一个接口类型，内部包含了io.Reader接口

		// 通过时间戳作为文件名
		unix := time.Now().Unix()
		m := md5.New()
		io.WriteString(m, strconv.FormatInt(unix, 10))
		filename := fmt.Sprintf("%x", md5.Sum(nil))

		if filename, err = qiniu.Upload(file, filename+".mp3", h.Size); err != nil { // 通过h.size 即可获得文件大小
			log.Printf("controllers:work  ----》 err：%v", err)
			this.renderJSON(UPLOAD_FAILED, "上传失败", nil)
			return
		}
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