Dev cape not working

I'm trying to make my mod show my optifine cape to people who don't have optifine. However I have this problem:

Heres my code:

CapeHandler:

public class CapeHandler {

private static ResourceLocation location = new ResourceLocation("DimCore:cape/Cape");

public static void registerCapeTexture() {
	URL url = null;

	try {
		url = new URL("https://optifine.net/capes/_RadiusOfRift_.png");
	} catch (MalformedURLException e) {
		e.printStackTrace();
	}

	Minecraft.getMinecraft().renderEngine.loadTexture(location, new ThreadDownloadImageData(null, url.toString(), null, new CapeBuffer()));
}

@SubscribeEvent
public void handlerCape(RenderPlayerEvent.Specials.Pre event) {
	if (event.entityPlayer.getUniqueID().equals(new UUID(you don't need to know my UUID))) {
		registerCapeTexture();
		((AbstractClientPlayer)event.entityPlayer).func_152121_a(MinecraftProfileTexture.Type.CAPE, location);
	}
}

}

CapeBuffer:

@SideOnly(Side.CLIENT)
public class CapeBuffer implements IImageBuffer {
    
@Override
    public BufferedImage parseUserSkin(BufferedImage texture) {
        if (texture == null)
            return null;
        int imageWidth = texture.getWidth(null) <= 64 ? 64 : texture.getWidth(null);
        int imageHeight = texture.getHeight(null) <= 32 ? 32 : texture.getHeight(null);

        BufferedImage capeImage = new BufferedImage(imageWidth, imageHeight, 2);

        Graphics graphics = capeImage.getGraphics();
        graphics.drawImage(texture, 0, 0, null);
        graphics.dispose();

        return capeImage;
    }

    @Override
    public void func_152634_a() {}
}

Why is my cape white?