Client server socket C#

Question

I am working on socket C#. I\'ve implemented a client server application using socket, but the problem is that the client doesn\'t receive all data sent by the server.

Answer 1

You're limiting the size of received messages by 2KB as you're using new byte[2000]. I think you could either:

• Size up you buffer to meet you message's size needs; and/or
• Split you message into more than one socket messages.

Given that 4-8K is a good size for buffering socket messages and assuming RAM size is not a issue I would start with that, say, new byte[8000].

Also, you can send socket messages splitted in chunks. Maybe this is a good idea for the case. For example, if you have msg as the message (or object) you want to send:

private static async Task SendAnswer(Message msg, WebSocket socket)
{
    var answer = System.Text.Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(msg).ToCharArray());

    var bufferSize = 8000;
    var endOfMessage = false;
    for (var offset = 0; offset < answer.Length; offset += bufferSize)
    {
        if (offset + bufferSize >= answer.Length)
        {
            bufferSize = answer.Length - offset;
            endOfMessage = true;
        }
        await socket.SendAsync(new ArraySegment(answer, offset, bufferSize),
            WebSocketMessageType.Text, endOfMessage, CancellationToken.None);
    }
}

And when receiving, you can also split the reception in chunks, so you can control you buffer (and therefore you memory consumption). After hanlding the whole message, you should wait for another message from the client to do more stuff. Source

private async Task ReceiveMessage(WebSocket webSocket)
{
    var buffer = new byte[8000];
    var result = await webSocket.ReceiveAsync(buffer, CancellationToken.None);
    while (!result.CloseStatus.HasValue)
    {
        string msg = Encoding.UTF8.GetString(new ArraySegment(buffer, 0, result.Count).ToArray());
        while (!result.EndOfMessage)
        {
            result = await webSocket.ReceiveAsync(buffer, CancellationToken.None);
            msg += Encoding.UTF8.GetString(new ArraySegment(buffer, 0, result.Count).ToArray());
        }

        //At this point, `msg` has the whole message you sent, you can do whatever you want with it.
        // [...]
        //After you handle the message, wait for another message from the client
        result = await webSocket.ReceiveAsync(buffer, CancellationToken.None);
    }
    await webSocket.CloseAsync(result.CloseStatus.Value, result.CloseStatusDescription, CancellationToken.None);
}