feat(thumb): enhance native thumbnail generater with encoding format and quality

pkg/filemanager/driver/cos/cos.go

@@ -352,6 +352,14 @@ func (handler Driver) Thumb(ctx context.Context, expire *time.Time, ext string,
 	w, h := handler.settings.ThumbSize(ctx)
 	thumbParam := fmt.Sprintf("imageMogr2/thumbnail/%dx%d", w, h)
 
+	enco := handler.settings.ThumbEncode(ctx)
+	switch enco.Format {
+	case "jpg", "webp":
+		thumbParam += fmt.Sprintf("/format/%s/rquality/%d", enco.Format, enco.Quality)
+	case "png":
+		thumbParam += fmt.Sprintf("/format/%s", enco.Format)
+	}
+
 	source, err := handler.signSourceURL(
 		ctx,
 		e.Source(),

pkg/filemanager/driver/ks3/ks3.go

@@ -298,7 +298,48 @@ func (handler *Driver) Delete(ctx context.Context, files ...string) ([]string, e
 
 // Thumb 获取缩略图URL
 func (handler *Driver) Thumb(ctx context.Context, expire *time.Time, ext string, e fs.Entity) (string, error) {
-	return "", errors.New("not implemented")
+	w, h := handler.settings.ThumbSize(ctx)
+	thumbParam := fmt.Sprintf("@base@tag=imgScale&m=0&w=%d&h=%d", w, h)
+
+	enco := handler.settings.ThumbEncode(ctx)
+	switch enco.Format {
+	case "jpg", "webp":
+		thumbParam += fmt.Sprintf("&q=%d&F=%s", enco.Quality, enco.Format)
+	case "png":
+	    thumbParam += fmt.Sprintf("&F=%s", enco.Format)
+	}
+
+	// 确保过期时间不小于 0 ，如果小于则设置为 7 天
+	var ttl int64
+	if expire != nil {
+		ttl = int64(time.Until(*expire).Seconds())
+	} else {
+		ttl = 604800
+	}
+
+	thumbUrl, err := handler.svc.GeneratePresignedUrl(&s3.GeneratePresignedUrlInput{
+		HTTPMethod: s3.GET,                            // 请求方法
+		Bucket:     &handler.policy.BucketName,        // 存储空间名称
+		Key:        aws.String(e.Source()+thumbParam), // 对象的key
+		Expires:    ttl,                               // 过期时间，转换为秒数
+	})
+
+	if err != nil {
+		return "", err
+	}
+
+	// 将最终生成的签名URL域名换成用户自定义的加速域名（如果有）
+	finalThumbURL, err := url.Parse(thumbUrl)
+	if err != nil {
+		return "", err
+	}
+
+	// 公有空间替换掉Key及不支持的头
+	if !handler.policy.IsPrivate {
+		finalThumbURL.RawQuery = ""
+	}
+
+	return finalThumbURL.String(), nil
 }
 
 // Source 获取文件外链

pkg/filemanager/driver/obs/obs.go

@@ -335,13 +335,24 @@ func (d *Driver) LocalPath(ctx context.Context, path string) string {
 
 func (d *Driver) Thumb(ctx context.Context, expire *time.Time, ext string, e fs.Entity) (string, error) {
 	w, h := d.settings.ThumbSize(ctx)
+	thumbParam := fmt.Sprintf("image/resize,m_lfit,w_%d,h_%d", w, h)
+
+	enco := d.settings.ThumbEncode(ctx)
+	switch enco.Format {
+	case "jpg", "webp":
+		thumbParam += fmt.Sprintf("/format,%s/quality,q_%d", enco.Format, enco.Quality)
+		thumbParam += fmt.Sprintf("/format,%s/quality,q_%d", enco.Format, enco.Quality)
+	case "png":
+		thumbParam += fmt.Sprintf("/format,%s", enco.Format)
+	}
+
 	thumbURL, err := d.signSourceURL(&obs.CreateSignedUrlInput{
 		Method:  obs.HttpMethodGet,
 		Bucket:  d.policy.BucketName,
 		Key:     e.Source(),
 		Expires: int(time.Until(*expire).Seconds()),
 		QueryParams: map[string]string{
-			imageProcessHeader: fmt.Sprintf("image/resize,m_lfit,w_%d,h_%d", w, h),
+			imageProcessHeader: thumbParam,
 		},
 	})
 

pkg/filemanager/driver/oss/oss.go

@@ -334,6 +334,15 @@ func (handler *Driver) Thumb(ctx context.Context, expire *time.Time, ext string,
 
 	w, h := handler.settings.ThumbSize(ctx)
 	thumbParam := fmt.Sprintf("image/resize,m_lfit,h_%d,w_%d", h, w)
+
+	enco := handler.settings.ThumbEncode(ctx)
+	switch enco.Format {
+	case "jpg", "webp":
+		thumbParam += fmt.Sprintf("/format,%s/quality,q_%d", enco.Format, enco.Quality)
+	case "png":
+		thumbParam += fmt.Sprintf("/format,%s", enco.Format)
+	}
+
 	thumbOption := []oss.Option{oss.Process(thumbParam)}
 	thumbURL, err := handler.signSourceURL(
 		ctx,

pkg/filemanager/driver/qiniu/qiniu.go

@@ -277,10 +277,20 @@ func (handler *Driver) Delete(ctx context.Context, files ...string) ([]string, e
 // Thumb 获取文件缩略图
 func (handler *Driver) Thumb(ctx context.Context, expire *time.Time, ext string, e fs.Entity) (string, error) {
 	w, h := handler.settings.ThumbSize(ctx)
+	thumbParam := fmt.Sprintf("imageView2/1/w/%d/h/%d", w, h)
+
+	enco := handler.settings.ThumbEncode(ctx)
+	switch enco.Format {
+	case "jpg", "webp":
+		thumbParam += fmt.Sprintf("/format/%s/q/%d", enco.Format, enco.Quality)
+	case "png":
+		thumbParam += fmt.Sprintf("/format/%s", enco.Format)
+	}
+
 	return handler.signSourceURL(
 		e.Source(),
 		url.Values{
-			fmt.Sprintf("imageView2/1/w/%d/h/%d", w, h): []string{},
+			thumbParam: []string{},
 		},
 		expire,
 	), nil

pkg/filemanager/driver/upyun/upyun.go

@@ -203,8 +203,16 @@ func (handler *Driver) Delete(ctx context.Context, files ...string) ([]string, e
 // Thumb 获取文件缩略图
 func (handler *Driver) Thumb(ctx context.Context, expire *time.Time, ext string, e fs.Entity) (string, error) {
 	w, h := handler.settings.ThumbSize(ctx)
-
 	thumbParam := fmt.Sprintf("!/fwfh/%dx%d", w, h)
+
+	enco := handler.settings.ThumbEncode(ctx)
+	switch enco.Format {
+	case "jpg", "webp":
+		thumbParam += fmt.Sprintf("/format/%s/quality/%d", enco.Format, enco.Quality)
+	case "png":
+		thumbParam += fmt.Sprintf("/format/%s", enco.Format)
+	}
+
 	thumbURL, err := handler.signURL(ctx, e.Source()+thumbParam, nil, expire)
 	if err != nil {
 		return "", err