EonaCat.DnsTester/EonaCat.DnsTester.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net7.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWindowsForms>true</UseWindowsForms>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
 
@@ -28,8 +28,5 @@
       <Generator>SettingsSingleFileGenerator</Generator>
       <LastGenOutput>Settings.Designer.cs</LastGenOutput>
     </None>
-    <None Update="Servers.xml">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
   </ItemGroup>
 </Project>

EonaCat.DnsTester/Helpers/DnsHelper.cs

@@ -21,7 +21,6 @@ namespace EonaCat.DnsTester.Helpers
             {
                 client.DontFragment = true;
                 client.EnableBroadcast = false;
-                client.Client.SendTimeout = DnsSendTimeout;
                 client.Client.ReceiveTimeout = DnsReceiveTimeout;
                 byte[] responseBytes = null;
                 if (FakeResponse)
@@ -43,7 +42,6 @@ namespace EonaCat.DnsTester.Helpers
         // For testing purposes
         public static bool FakeResponse { get; set; }
 
-        public static int DnsSendTimeout { get; set; } = 5;
         public static int DnsReceiveTimeout { get; set; } = 5;
 
 

EonaCat.DnsTester/Helpers/UrlHelper.cs

@@ -39,23 +39,11 @@ namespace EonaCat.DnsTester.Helpers
 
                 string url = searchEngine.Value + letters;
 
-                using (var client = new WebClient())
-                {
-                    string responseString = null;
                 try
                 {
-                        responseString = client.DownloadString(url);
+                    using (var client = new WebClient())
-                    }
-                    catch (Exception ex)
                     {
-                        searchEngineUrls.Remove(searchEngine.Key);
+                        string responseString = client.DownloadString(url);
-                        SetStatus($"{searchEngine.Key}: {ex.Message}");
-                    }
-
-                    if (responseString == null)
-                    {
-                        continue;
-                    }
 
                         // find all .xxx.com addresses
                         MatchCollection hostNames = Regex.Matches(responseString, @"[.](\w+[.]com)");
@@ -86,9 +74,18 @@ namespace EonaCat.DnsTester.Helpers
                         }
                     }
 
-                letters = GetRandomLetters();
                     await Task.Delay(100);
                 }
+                catch (Exception ex)
+                {
+                    searchEngineUrls.Remove(searchEngine.Key);
+                    SetStatus($"{searchEngine.Key}: {ex.Message}");
+                }
+                finally
+                {
+                    letters = GetRandomLetters();
+                }
+            }
 
             var urlText = "url" + (urls.Count > 1 ? "'s" : string.Empty);
             SetStatus($"{urls.Count} random {urlText} found");

EonaCat.DnsTester/MainForm.cs

@@ -55,6 +55,12 @@ namespace EonaCat.DnsTester
             urls = await UrlHelper.RetrieveUrls(numThreads, numUrlsPerThread);
             AddUrlToView(urls);
 
+
+            if (IsRunning)
+            {
+                return;
+            }
+
             IsRunning = true;
             await Process(_recordType, urls.ToArray(), _dnsServer1, _dnsServer2);
             IsRunning = false;
@@ -192,11 +198,15 @@ namespace EonaCat.DnsTester
             DnsHelper.OnLog += DnsHelper_OnLog;
 
             for (int i = 0; i < urlsTotal; i++)
+            {
+                await Task.Run(async () =>
                 {
                     var currentUrl = urls[i];
+
                     await ExecuteDns1(recordType, dnsAddress1, currentUrl, dnsId1, i);
                     if (!chkDns2.Checked) return;
                     await ExecuteDns2(recordType, dnsAddress2, currentUrl, dnsId2, i);
+                });
                 await Task.Delay(100);
             }
         }

README.md

@@ -5,5 +5,3 @@ EonaCat.DnsTester
 Dns Testing tool for Blocky
 
 https://blocky.EonaCat.com
-
-[![EonaCat DnsTester](https://github.com/EonaCat/EonaCat.DnsTester/blob/main/Screenshots/1.png?raw=true "EonaCat DnsTester")](https://github.com/EonaCat/EonaCat.DnsTester/blob/main/Screenshots/1.png?raw=true "EonaCat DnsTester")