test.go

func PostArticle(c *gin.Context) {
	var input Article

	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	decodedImage, err := base64.StdEncoding.DecodeString(input.ImageB64)
	if err != nil {
		panic(err)
	}

	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		fmt.Println(err.Error())
	}
	defer client.Close()

	buf := bytes.NewBuffer(decodedImage)
	ctx, cancel := context.WithTimeout(ctx, time.Second*50)
	defer cancel()

	wc := client.Bucket("original-images-4646").Object(input.Title).NewWriter(ctx)

	if _, err = io.Copy(wc, buf); err != nil {
		fmt.Println(err.Error())
	}
	// Data can continue to be added to the file until the writer is closed.
	if err := wc.Close(); err != nil {
		fmt.Println(err.Error())
	}