public virtual Stream Connect(Uri uri, bool requireAuthentication) {
// IIS starts python.exe processes lazily on the first incoming request, and will terminate them after a period
// of inactivity, making it impossible to attach. So before trying to connect to the debugger, "ping" the website
// via HTTP to ensure that we have something to connect to.
try {
var httpRequest = WebRequest.Create(new UriBuilder(uri) { Scheme = "http", Port = -1, Path = "/" }.Uri);
httpRequest.Method = WebRequestMethods.Http.Head;
httpRequest.Timeout = 5000;
httpRequest.GetResponse().Dispose();
} catch (WebException) {
// If it fails or times out, just go ahead and try to connect anyway, and rely on normal error reporting path.
}
var webSocket = new ClientWebSocket();
try {
webSocket.ConnectAsync(uri, CancellationToken.None).GetAwaiter().GetResult();
var stream = new WebSocketStream(webSocket, ownsSocket: true);
webSocket = null;
return stream;
} catch (WebSocketException ex) {
throw new ConnectionException(ConnErrorMessages.RemoteNetworkError, ex);
} catch (IOException ex) {
throw new ConnectionException(ConnErrorMessages.RemoteNetworkError, ex);
} catch (PlatformNotSupportedException ex) {
throw new ConnectionException(ConnErrorMessages.RemoteUnsupportedTransport, ex);
} finally {
if (webSocket != null) {
webSocket.Dispose();
}
}
}
public WebSocketNetworkClient(Uri uri) {
// iisnode starts node.exe processes lazily on the first incoming request, and will terminate them after a period
// of inactivity, making it impossible to attach. So before trying to connect to the debugger, "ping" the website
// via HTTP to ensure that we have something to connect to.
try {
var httpRequest = WebRequest.Create(new UriBuilder(uri) { Scheme = "http", Port = -1, Path = "/" }.Uri);
httpRequest.Method = WebRequestMethods.Http.Head;
httpRequest.Timeout = 5000;
httpRequest.GetResponse().Dispose();
} catch (WebException) {
// If it fails or times out, just go ahead and try to connect anyway, and rely on normal error reporting path.
}
_webSocket = new ClientWebSocket();
_webSocket.ConnectAsync(uri, CancellationToken.None).GetAwaiter().GetResult();
_stream = new WebSocketStream(_webSocket);
}