Function ShowImg

utils/util.go:597–614

操作图片显示 如果用的是oss存储，这style是avatar、cover可选项

(img string, style ...string)

// 操作图片显示
// 如果用的是oss存储，这style是avatar、cover可选项
func ShowImg(img string, style ...string) (url string) {
	img = strings.ReplaceAll(img, "\\", "/")
	if strings.HasPrefix(img, "https://") || strings.HasPrefix(img, "http://") {
		return img
	}
	img = "/" + strings.TrimLeft(img, "./")
	switch StoreType {
	case StoreOss:
		s := ""
		if len(style) > 0 && strings.TrimSpace(style[0]) != "" {
			s = "/" + style[0]
		}
		url = strings.TrimRight(beego.AppConfig.String("oss::Domain"), "/ ") + img + s
	case StoreLocal:
		url = img
	}
	return
}

// Substr returns the substr from start to length.
func Substr(s string, length int) string {