Try HTTP Request

src/application.vala

@@ -60,5 +60,15 @@ public class Allesapp.Application : Adw.Application {
 
     private void on_preferences_action () {
         message ("app.preferences action activated");
+
+        var session = new Soup.Session ();
+        var msg = new Soup.Message ("GET", "http://ip4.clerie.de");
+
+        var input_stream = session.send (msg);
+        var data_input_stream = new DataInputStream (input_stream);
+
+        message (data_input_stream.read_line_utf8());
+
     }
+
 }