private async Task WatchForMessagesFromServer()
{
var buffer = new byte[ReceiveChunkSize];
try
{
while (_ws.State == WebSocketState.Open)
{
var stringResult = new StringBuilder();
WebSocketReceiveResult result;
do
{
result = await _ws.ReceiveAsync(new ArraySegment <byte>(buffer), _cancellationToken);
if (result.MessageType == WebSocketMessageType.Close)
{
await _ws.CloseAsync(WebSocketCloseStatus.NormalClosure, string.Empty, CancellationToken.None);
CallOnDisconnected();
}
else
{
var str = Encoding.UTF8.GetString(buffer, 0, result.Count);
stringResult.Append(str);
}
} while (!result.EndOfMessage);
CallOnMessage(stringResult);
}
}
catch (Exception)
{
CallOnDisconnected();
}
finally
{
_ws.Dispose();
}
}
static async Task TestConnection(string server)
{
using (var ws = new System.Net.WebSockets.Managed.ClientWebSocket())
{
await ws.ConnectAsync(new Uri(server), CancellationToken.None);
var buffer = new ArraySegment <byte>(new byte[1024]);
var readTask = ws.ReceiveAsync(buffer, CancellationToken.None);
const string msg = "hello";
var testMsg = new ArraySegment <byte>(Encoding.UTF8.GetBytes(msg));
await ws.SendAsync(testMsg, WebSocketMessageType.Text, true, CancellationToken.None);
var read = await readTask;
var reply = Encoding.UTF8.GetString(buffer.Array, 0, read.Count);
if (reply != msg)
{
throw new Exception($"Expected to read back '{msg}' but got '{reply}' for server {server}");
}
Console.WriteLine("Success connecting to server " + server);
}
}
private async void StartReceiving(ClientWebSocket client)
{
if (_result != null)
{
_result.Clear();
}
//单次完整数据
string msg = "";
while (true)
{
try
{
if (client.CloseStatus == WebSocketCloseStatus.EndpointUnavailable ||
client.CloseStatus == WebSocketCloseStatus.InternalServerError ||
client.CloseStatus == WebSocketCloseStatus.EndpointUnavailable)
{
Status = ServiceStatus.Stopped;
return;
}
//唔，足够大的缓冲区
var array = new byte[100000];
var receive = await client.ReceiveAsync(new ArraySegment <byte>(array), CancellationToken.None);
if (receive.MessageType == WebSocketMessageType.Text)
{
if (receive.Count <= 0)
{
continue;
}
//string msg = Encoding.UTF8.GetString(array, 0, receive.Count);
//在Winform中无法把json一次完整接收，需要判断EndOfMessage的状态。
//临时不完整数据
string tempMsg = Encoding.UTF8.GetString(array, 0, receive.Count);
msg += tempMsg;
if (receive.EndOfMessage == false)
{
continue;
}
TTSResult result = JsonSerializer.Deserialize <TTSResult>(msg, new JsonSerializerOptions()
{
PropertyNameCaseInsensitive = true
});
//清空数据
msg = "";
if (result.Code != 0)
{
throw new Exception($"Result error: {result.Message}");
}
if (result.Data == null)
{
//空帧，不用管
continue;
}
byte[] audiaBuffer = System.Convert.FromBase64String(result.Data.Audio);
_result.AddRange(audiaBuffer);
OnMessage?.Invoke(this, result.Data.Audio);
if (result.Data.Status == 2)
{
Status = ServiceStatus.Stopped;
}
}
}
catch (WebSocketException)
{
Status = ServiceStatus.Stopped;
return;
}
catch (Exception ex)
{
Status = ServiceStatus.Stopped;
if (!ex.Message.ToLower().Contains("unable to read data from the transport connection"))
{
OnError?.Invoke(this, new ErrorEventArgs()
{
Code = ResultCode.Error,
Message = ex.Message,
Exception = ex,
});
}
}
}
}