ajustado APIService e fixação Ntrip na base

AgroBase/AgroBase/Services/APIService.cs

@@ -5,6 +5,7 @@ using System.IO;
 using System.Net;
 using System.Net.Http;
 using System.Net.Http.Headers;
+using System.Threading;
 using System.Threading.Tasks;
 
 namespace AgroBase.Services
@@ -26,28 +27,7 @@ namespace AgroBase.Services
                 return "https://zendioninc.com.br/agrobase/downloads";
             }
         }
-        private static bool _hasInternet
-        {
-            get
-            {
-                try
-                {
-                    using (var client = new WebClient())
-                    {
-                        using (client.OpenRead("https://zendioninc.com.br/"))
-                        {
-                            return true;
-                        }
-                    }
-                }
-                catch
-                {
-                    return false;
-                }
-            }
-        }
         public static bool HasInternet { get; set; }
-        public static bool HasInternetNow() => _hasInternet;
 
         public static async Task IniciarRotinasAsync()
         {
@@ -64,9 +44,42 @@ namespace AgroBase.Services
             tmrMonitoramento.Start();
         }
 
+        private static readonly HttpClient _internetClient = new HttpClient { Timeout = TimeSpan.FromSeconds(3) };
+
+        public static async Task<bool> HasInternetNowAsync(CancellationToken ct = default)
+        {
+            try
+            {
+                var request =
+                    new HttpRequestMessage(
+                        HttpMethod.Get,
+                        "https://zendioninc.com.br/"
+                    );
+
+                var response =
+                    await _internetClient.SendAsync(
+                        request,
+                        HttpCompletionOption.ResponseHeadersRead,
+                        ct
+                    ).ConfigureAwait(false);
+
+                /*
+                 * Qualquer resposta HTTP significa que DNS,
+                 * TCP e HTTPS chegaram ao servidor.
+                 */
+                return true;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
         private static async Task tmrMonitoramento_Tick()
         {
-            HasInternet = HasInternetNow();
+            HasInternet =
+                await HasInternetNowAsync()
+                    .ConfigureAwait(false);
         }
 
         // Método para GET

AgroBase/OperationControl/Services/GpsService.cs

@@ -2062,21 +2062,13 @@ namespace OperationControl.Services
 
         private async Task AplicarCorrecaoRTK_NtripAsync(CancellationToken ct)
         {
-            if (!IsConnected || !APIService.HasInternet)
+            if (!IsConnected)
                 return;
 
             double backoffSeconds = 1.0;
 
             while (!ct.IsCancellationRequested && CorrecaoRTK_Ntrip)
             {
-                if (!APIService.HasInternet)
-                {
-                    Ntrip_Conectado = false;
-                    LimparNtripAtivo();
-                    await Task.Delay(TimeSpan.FromSeconds(2), ct).ConfigureAwait(false);
-                    continue;
-                }
-
                 List<NtripProviderConfig> providers = ObterSequenciaProvedoresNtrip();
 
                 if (providers.Count == 0)
@@ -3796,9 +3788,6 @@ namespace OperationControl.Services
             Func<Task> stopNtrip = null,
             CancellationToken ct = default)
         {
-            if (!APIService.HasInternetNow())
-                return false;
-
             await ConfigurarComoRoverParadoAsync(portaUsb, portaEntrada, ct)
                 .ConfigureAwait(false);