vertx socket 定长数据

    /**
     * 处理前端每一次完整请求的数据
     * @param socket
     * @param buf
     */
    private void dealContent(NetSocket socket,Buffer buf){
        contents.computeIfAbsent(socket.toString(),key->Buffer.buffer());

        contents.get(socket.toString()).appendBuffer(buf.copy());
        Buffer full_content = contents.get(socket.toString());
        if(full_content.length() > 4 ){
            int content_length = Integer.valueOf(full_content.getBuffer(0, 4).toString());
            Buffer last = full_content.getBuffer(4,full_content.length());
            /**
             * 开始处理某次请求的完整数据
             */
            if(last.length() >= content_length){
                //当前要处理的完整请求数据
                String mes = last.slice(0,content_length).copy().toString("utf-8");
                System.out.println("客户端数据 : "+mes);

                JsonObject json = new JsonObject(mes);
                System.out.println(json.getString("role"));
                System.out.println(json.getString("action"));
                System.out.println(json.getJsonObject("msg").toString());
                /**
                 * 添加刚进入的socket到相应的corridor 并通知此socket此corridor的情况
                 */
                if(json.getString("role").equals("corridor") && json.getString("action").equals("connect")){
                    JsonObject msg = json.getJsonObject("msg");
                    System.out.println("进入的socket : "+msg.toString());
                    //通知 各个游戏不同
                    dealFirstNotify(msg.getString("game"),socket);
                }
                /**
                 * 消息处理
                 */
                else {
                    Buffer buffer = Buffer.buffer().appendString("你好呀","utf-8");

                    socket.write(buffer);
                }

                /**
                 * 消息广播
                 */

                contents.put(socket.toString(),full_content.slice(content_length+4,full_content.length()).copy());
            }

        }
    }