MessageCodec.java 文件源码

private Message decodeWebSocketFrame(ChannelHandlerContext ctx, WebSocketFrame frame) {
    // Check for closing frame
    if (frame instanceof CloseWebSocketFrame) {
        handshaker.close(ctx.channel(), (CloseWebSocketFrame) frame.retain());
        return null;
    }

    if (frame instanceof PingWebSocketFrame) {
        ctx.write(new PongWebSocketFrame(frame.content().retain()));
        return null;
    }

    if (frame instanceof TextWebSocketFrame) {
        TextWebSocketFrame textFrame = (TextWebSocketFrame) frame;
        return parseMessage(textFrame.content());
    }

    if (frame instanceof BinaryWebSocketFrame) {
        BinaryWebSocketFrame binFrame = (BinaryWebSocketFrame) frame;
        return parseMessage(binFrame.content());
    }

    log.warn("Message format error: " + frame); 
    return null;
}