refactor: reintroduce the .NET Framework 4.8 target framework (#740)

* refactor: reintroduce the .NET Framework 4.8 target framework into the project

* Update if condition so .NET 6+ would be the primary platform

Co-authored-by: MartyIX <[email protected]>

* chore: Use if condition for all .NET versions not just 6.0

* chore: Use latest LangVersion on Appium.Net.cspoj

* chore: update if statements to ignore NET48 and include more .NET versions

* Apply suggestions from code review

Co-authored-by: MartyIX <[email protected]>

* Update method name

Co-authored-by: MartyIX <[email protected]>

* fix: update method name where we call it

* chore: add ConfigureAwait(false) for NET48

---------

Co-authored-by: MartyIX <[email protected]>

Author: Dor-bl

src/Appium.Net/Appium.Net.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net6.0</TargetFrameworks>
+    <TargetFrameworks>net48;net6.0</TargetFrameworks>
     <PackageLicenseFile>LICENSE.txt</PackageLicenseFile>
     <RootNamespace>OpenQA.Selenium</RootNamespace>
     <Company>Appium Commiters</Company>
@@ -27,7 +27,7 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>
   <PropertyGroup>
-    <LangVersion>8.0</LangVersion>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|netstandard2.0|AnyCPU'">
     <NoWarn>1701;1702;1591</NoWarn>

src/Appium.Net/Appium/Service/AppiumLocalService.cs

@@ -20,7 +20,9 @@
 using System.IO;
 using System.Linq;
 using System.Net;
+#if NET
 using System.Net.Http;
+#endif
 using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
 
@@ -37,7 +39,9 @@ public class AppiumLocalService : ICommandServer
         private readonly int Port;
         private readonly TimeSpan InitializationTimeout;
         private readonly IDictionary<string, string> EnvironmentForProcess;
+#if !NET48
         private readonly HttpClient SharedHttpClient;
+#endif
         private Process Service;
         private List<string> ArgsList;
 
@@ -61,9 +65,12 @@ internal AppiumLocalService(
             Port = port;
             InitializationTimeout = initializationTimeout;
             EnvironmentForProcess = environmentForProcess;
+#if !NET48
             SharedHttpClient = CreateHttpClientInstance;
+#endif
         }
 
+#if !NET48
         private HttpClient CreateHttpClientInstance
         {
             get
@@ -75,7 +82,7 @@ private HttpClient CreateHttpClientInstance
                 return new HttpClient(handler);
             }
         }
-
+#endif
         /// <summary>
         /// The base URL for the managed appium server.
         /// </summary>
@@ -168,8 +175,9 @@ private void DestroyProcess()
             finally
             {
                 Service?.Close();
-
+#if !NET48
                 SharedHttpClient.Dispose();
+#endif
             }
         }
 
@@ -288,12 +296,20 @@ private async Task<bool> PingAsync(TimeSpan span)
             {
                 try
                 {
+#if NET48
+                    HttpWebResponse response = await GetHttpResponseAsync(status).ConfigureAwait(false);
+                    if (response.StatusCode == HttpStatusCode.OK)
+                    {
+                        return true;
+                    }
+#elif NET
                     HttpResponseMessage response = await GetHttpResponseAsync(status).ConfigureAwait(false);
 
                     if (response.IsSuccessStatusCode)
                     {
                         return true;
                     }
+#endif
                 }
                 catch
                 {
@@ -302,11 +318,21 @@ private async Task<bool> PingAsync(TimeSpan span)
             }
             return pinged;
         }
-
-        private async Task<HttpResponseMessage> GetHttpResponseAsync(Uri status)
+#if NET48
+        private async Task<HttpWebResponse> GetHttpResponseAsync(Uri status)
         {
-            HttpResponseMessage response = await SharedHttpClient.GetAsync(status).ConfigureAwait(false);
-            return response;
+            return await Task.Run(() =>
+            {
+                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(status);
+                return (HttpWebResponse)request.GetResponse();
+            }).ConfigureAwait(false);
         }
+#else
+        private async Task<HttpResponseMessage> GetHttpResponseAsync(Uri status)
+            {
+                HttpResponseMessage response = await SharedHttpClient.GetAsync(status).ConfigureAwait(false);
+                return response;
+            }
+#endif
     }
 }

test/integration/Android/ClipboardTest.cs

@@ -83,7 +83,9 @@ public void WhenSetClipboardContentTypeIsImageSetClipboardShouldReturnNotImpleme
         }
 
         [Test]
+#if !NET48
         [SupportedOSPlatform("windows")]
+#endif
         public void WhenGetClipboardImageGetClipboardShouldReturnNotImplementedException()
         {
             Assert.That(() => _driver.GetClipboardImage(),

test/integration/Appium.Net.Integration.Tests.csproj

@@ -1,6 +1,7 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net6.0</TargetFrameworks>
+    <TargetFrameworks>net48;net6.0</TargetFrameworks>
+	<LangVersion>latest</LangVersion>
   </PropertyGroup>
   <ItemGroup>
     <Compile Remove="apps\**" />