websocket-shap 函数Broadcast的使用方法

Broadcast：在websocket-shap函数的定义是：向WebSocket服务中的每个客户端发送数据，类似于广播的效果

如果要使用异步发送，可使用BroadcastAsync函数。

在源码中的代码片段如下：

//向WebSocket服务中的每个客户端发送string数据
 public void Broadcast (string data)
    {
      if (_state != ServerState.Start) {
        var msg = "管理器的当前状态为“未启动”|The current state of the manager is not Start.";
        throw new InvalidOperationException (msg);
      }

      if (data == null)
        throw new ArgumentNullException ("data");

      byte[] bytes;
      if (!data.TryGetUTF8EncodedBytes (out bytes)) {
        var msg = "无法进行utf-8编码|It could not be UTF-8-encoded.";
        throw new ArgumentException (msg, "data");
      }

      if (bytes.LongLength <= WebSocket.FragmentLength)
        broadcast (Opcode.Text, bytes, null);
      else
        broadcast (Opcode.Text, new MemoryStream (bytes), null);
    }

//向WebSocket服务中的每个客户端发送stream数据
public void Broadcast (Stream stream, int length)
    {
      if (_state != ServerState.Start) {
        var msg = "The current state of the manager is not Start.";
        throw new InvalidOperationException (msg);
      }

      if (stream == null)
        throw new ArgumentNullException ("stream");

      if (!stream.CanRead) {
        var msg = "It cannot be read.";
        throw new ArgumentException (msg, "stream");
      }

      if (length < ) {
        var msg = "Less than 1.";
        throw new ArgumentException (msg, "length");
      }

      var bytes = stream.ReadBytes (length);

      var len = bytes.Length;
      if (len == ) {
        var msg = "No data could be read from it.";
        throw new ArgumentException (msg, "stream");
      }

      if (len < length) {
        _log.Warn (
          String.Format (
            "Only {0} byte(s) of data could be read from the stream.",
            len
          )
        );
      }

      if (len <= WebSocket.FragmentLength)
        broadcast (Opcode.Binary, bytes, null);
      else
        broadcast (Opcode.Binary, new MemoryStream (bytes), null);
    }

//c# 调用方式：
private void Broadcast(string msg, string type = "")
        {
            var data = new JsonDto() { content = msg, type = type, name = "" };
            //发送广播数据，每个在线的客户端都可以收到信息
            Sessions.Broadcast(Newtonsoft.Json.JsonConvert.SerializeObject(data));
        }