Interact with websocket using PowerShell

websocket.ps1

# based on https://learn.microsoft.com/en-us/dotnet/fundamentals/networking/websockets
# Very minimal setup without good error handling or careful consideration - for quick and dirty tests
$c = [System.Net.WebSockets.ClientWebSocket]::new()

$c.Options.KeepAliveInterval = [TimeSpan]::FromSeconds(10)
$c.Options.KeepAliveTimeout = [TimeSpan]::FromSeconds(10)
$c.connectasync("ws://localhost:8000/ws", [Activator]::CreateInstance([System.Threading.CancellationToken])).GetAwaiter().GetResult()

$b = [byte[]]::new(1024)
$result = $c.receiveAsync([System.ArraySegment[byte]]$b, [System.Threading.CancellationToken]::None).GetAwaiter().GetResult()
$text = [System.Text.Encoding]::UTF8.GetString($b, 0, $result.Count)

$c.CloseAsync([System.Net.WebSockets.WebSocketCloseStatus]::NormalClosure, "Client closed", [System.Threading.CancellationToken]::None).GetAwaiter().GetResult()