public static async Task <EchoClient_Rfc_862.EchoResult> RunTcpAsync()
{
// Hint: the using here means that the server is automatically closed
// after the code is done. If you don't do that, the server stays open.
using (var server = new EchoServer_Rfc_862())
{
await server.StartAsync();
var client = new EchoClient_Rfc_862();
// You only get the echo'd result from TCP with the final CloseAsync()
// But for UDP you get the returned packet.
var partialResult = await client.WriteAsync(
new Windows.Networking.HostName("localhost"),
server.Options.Service,
EchoClient_Rfc_862.ProtocolType.Tcp,
"Hello, echo server!");
// TODO: remove magic value?
// Wait for the echo to have worked. The server is right here, so the
// echo should be almost instantaneous.
await Task.Delay(100);
var completeResult = await client.CloseAsync(); // Close is essential for TCP.
return(completeResult);
}
}
private async void OnClose(object sender, RoutedEventArgs e)
{
if (client != null)
{
await client.CloseAsync();
}
client = null;
}
public static async Task <EchoClient_Rfc_862.EchoResult> RunUdpAsync()
{
// Hint: the using here means that the server is automatically closed
// after the code is done. If you don't do that, the server stays open.
using (var server = new EchoServer_Rfc_862())
{
await server.StartAsync();
var client = new EchoClient_Rfc_862();
var result = await client.WriteAsync(
new Windows.Networking.HostName("localhost"),
server.Options.Service,
EchoClient_Rfc_862.ProtocolType.Udp,
"Hello, echo server!");
await client.CloseAsync(); // Close is really needed for TCP.
return(result);
}
}
public async Task Test_Echo_Good_Path_Tcp()
{
using (var server = new EchoServer_Rfc_862())
{
var client = new EchoClient_Rfc_862();
await server.StartAsync();
var result1 = await client.WriteAsync(new HostName("localhost"), server.Options.Service, EchoClient_Rfc_862.ProtocolType.Tcp, "ABCdef");
Infrastructure.IfTrueError(result1.Succeeded != EchoClient_Rfc_862.EchoResult.State.InProgress, "TCP status should be in progress");
var result2 = await client.WriteAsync(new HostName("localhost"), server.Options.Service, EchoClient_Rfc_862.ProtocolType.Tcp, "123456");
Infrastructure.IfTrueError(result2.Succeeded != EchoClient_Rfc_862.EchoResult.State.InProgress, "TCP status should be in progress");
await Task.Delay(100); //TODO: artificial delay to get the results.
var result3 = await client.CloseAsync();
Infrastructure.IfTrueError(result3.Succeeded != EchoClient_Rfc_862.EchoResult.State.Succeeded, "Close TCP status should be succeeded");
Infrastructure.IfTrueError(result3.Value != "ABCdef123456", $"Should have gotten back abcDEF123456, not {result3.Value}");
}
}