WebSocketRemoteServerFrameHandler.java 文件源码

@Override
protected void channelRead0(ChannelHandlerContext ctx, WebSocketFrame frame) throws Exception {
    if (frame instanceof TextWebSocketFrame) {
        // Echos the same text
        String text = ((TextWebSocketFrame) frame).text();
        if (PING.equals(text)) {
            ctx.writeAndFlush(new PingWebSocketFrame(Unpooled.wrappedBuffer(new byte[]{1, 2, 3, 4})));
            return;
        }
        ctx.channel().writeAndFlush(new TextWebSocketFrame(text));
    } else if (frame instanceof BinaryWebSocketFrame) {
        ctx.channel().writeAndFlush(frame.retain());
    } else if (frame instanceof CloseWebSocketFrame) {
        ctx.close();
    } else {
        String message = "unsupported frame type: " + frame.getClass().getName();
        throw new UnsupportedOperationException(message);
    }
}