Update douyin.go

douyin.go

@@ -2,24 +2,42 @@ package douyin
 
 import "log"
 
-func WatermarkRemover(url string)  (string, error) {
+func WatermarkRemover(url string) (string, error) {
 	id, err := getVideoId(url)
 	if err != nil {
 		log.Fatal(err)
 		return "", err
 	}
+
+	if len(id) == 0 {
+		return "", nil
+	}
+
 	videoLink, err := getVideoLink(id)
 
 	if err != nil {
 		log.Fatal(err)
 		return "", err
 	}
 
+	if len(videoLink) == 0 {
+		return "", nil
+	}
+
+
+
 	finalLink, err := getFinalVideoLink(videoLink)
+
 	if err != nil {
 		log.Fatal(err)
 		return "", err
 	}
+
+	if len(finalLink) == 0 {
+		return "", nil
+	}
+
+
+
 	return finalLink, nil
 }
-