Using Async-Await in Socket

Question

In Stefen Toub's code Awaiting Socket Operations : it doesn't mention about the usage of its async methods. I mean how the Server program will be calling the async methods using await? Ther isn't any main() also. Please elaborate over this. I tried creating a main() and calling the SocketExtensions.ReceiveAsync(sock,awaitable);

public static void Main(string[] str)
{
    Console.WriteLine("\n\n<<<<<<<<<<<  Server is starting...  >>>>>>>>>>>>>>>>>");

    IPEndPoint remoteEP = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 10100);
    Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    var args = new SocketAsyncEventArgs();
    args.SetBuffer(new byte[0x100000], 0, 0x100000);
    var awaitable = new SocketAwaitable(args);
    while(true)
        SocketExtensions.ReceiveAsync(sock,awaitable);
}

But it didn't work for me.

What exactly 'didn't work'?

Sam Leach
– Sam Leach

2013-10-28 10:32:46 +00:00
Commented Oct 28, 2013 at 10:32 — Sam Leach
– Sam Leach, Commented Oct 28, 2013 at 10:32

Stephen Cleary · Accepted Answer · 2013-10-28 12:36:15Z

4

Stephen Toub's blog post is not a sockets tutorial; it's showing how to use custom awaitables to support extremely high-performance socket applications.

I recommend that you start with something like WebAPI or WCF and only use bare sockets if you have to. If you absolutely do need to use sockets, then I recommend that you first use TaskFactory.FromAsync to wrap the Begin/End methods; this is slightly less efficient but an easier programming model. If performance tests indicate that your server isn't fast enough at this point, then you should use the custom awaiter approach from Stephen Toub's blog post.

The reason your server isn't working is because you're not listening nor accepting. I recommend you use WebAPI or WCF instead.

answered Oct 28, 2013 at 12:36

Stephen Cleary

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