Autodetect proxy - JavaFX - webview - webview

Question

My browser (webview) starts with an HTML page
FILEJAVA.class.getResource ("FILEHTML.html"). ToExternalForm ()
Whenever I access the google, I want to know whether the browser check, if the network has proxy (proxy'm working manual)
So that the browser shows a dialog to enter User name and password.

Answer 1

You can use ProxySelector to check proxy. See next example:
public class DetectProxy extends Application {
private Pane root;
#Override
public void start(final Stage stage) throws URISyntaxException {
root = new VBox();
List<Proxy> proxies = ProxySelector.getDefault().select(new URI("http://google.com"));
final Proxy proxy = proxies.get(0); // ignoring multiple proxies to simplify code snippet
if (proxy.type() != Proxy.Type.DIRECT) {
// you can change that to dialog using separate Stage
final TextField login = new TextField("login");
final PasswordField pwd = new PasswordField();
Button btn = new Button("Submit");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent t) {
System.setProperty("http.proxyUser", login.getText());
System.setProperty("http.proxyPassword", pwd.getText());
showWebView();
}
});
root.getChildren().addAll(login, pwd, btn);
} else {
showWebView();
}
stage.setScene(new Scene(root, 600, 600));
stage.show();
}
private void showWebView() {
root.getChildren().clear();
WebView webView = new WebView();
final WebEngine webEngine = webView.getEngine();
root.getChildren().addAll(webView);
webEngine.load("http://google.com");
}
public static void main(String[] args) {
launch();
}
}
authentification may require additional code in some cases, see Authenticated HTTP proxy with Java for details.