- Fix HTTPS proxies some issues (issue #44)

- Changed target NET Framework to 4.5 now supported (4.5+ now supported)
- ProxyClient.AbsoluteUriInStartingLine by default is false now

Author: grandsilence

Leaf.xNet.Tests/Leaf.xNet.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;netcoreapp3.0</TargetFrameworks>
+    <TargetFrameworks>net45;netcoreapp3.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
 

Leaf.xNet/Leaf.xNet.csproj

@@ -11,7 +11,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>Leaf.xNet</RootNamespace>
     <AssemblyName>Leaf.xNet</AssemblyName>
-    <TargetFrameworks>net452;net462;net472;net48;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>net45;netstandard2.0</TargetFrameworks>
     <FileAlignment>512</FileAlignment>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Authors>Grand Silence</Authors>
@@ -49,7 +49,7 @@
     <PackageTags>net,http,socks,proxy,cloudflare,xnet,https,stormwall,useragent,parsing,bot,web,crowling</PackageTags>
     <PackageIcon>icon.png</PackageIcon>
     <NoWarn>1591,1573</NoWarn>
-    <Description>Improved xNet for .NET Framework 4.5.2+ &amp; .NET Core 2+</Description> <!-- Ignore warinings abound undocumented code -->
+    <Description>Improved xNet for .NET Framework 4.5+ / .NET Standard 2.0</Description> <!-- Ignore warinings abound undocumented code -->
   </PropertyGroup>
 
   <ItemGroup>

Leaf.xNet/~Http/HttpRequest.cs

@@ -735,6 +735,18 @@ public HttpRequest()
         {
             Init();
         }
+        
+        static HttpRequest()
+        {
+            // It's a fix of HTTPs Proxies SSL issue
+            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
+            ServicePointManager.ServerCertificateValidationCallback += ServerCertificateValidationCallback;
+        }
+        
+        private static bool ServerCertificateValidationCallback(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslpolicyerrors)
+        {
+            return true;
+        }
 
         /// <summary>
         /// Инициализирует новый экземпляр класса <see cref="HttpRequest"/>.
@@ -3528,7 +3540,12 @@ private void CreateConnection(Uri address)
         private string GenerateStartingLine(HttpMethod method)
         {
             // Fix by Igor Vacil'ev: sometimes proxies returns 404 when used full path.
-            string query = _currentProxy != null && _currentProxy.Type == ProxyType.HTTP && _currentProxy.AbsoluteUriInStartingLine
+            bool hasHttpProxyWithAbsoluteUriInStartingLine = 
+                _currentProxy != null &&
+                _currentProxy.Type == ProxyType.HTTP &&
+                _currentProxy.AbsoluteUriInStartingLine;
+
+            string query = hasHttpProxyWithAbsoluteUriInStartingLine
                 ? Address.AbsoluteUri
                 : Address.PathAndQuery;
 

Leaf.xNet/~Proxy/HttpProxyClient.cs

@@ -194,14 +194,14 @@ private string GenerateAuthorizationHeader()
 
         private void SendConnectionCommand(Stream nStream, string destinationHost, int destinationPort)
         {
-            var commandBuilder = new StringBuilder();
-
-            commandBuilder.AppendFormat("CONNECT {0}:{1} HTTP/{2}\r\n", destinationHost, destinationPort, ProtocolVersion);
-            commandBuilder.AppendFormat(GenerateAuthorizationHeader());
-            commandBuilder.AppendLine();
-
-            var buffer = Encoding.ASCII.GetBytes(commandBuilder.ToString());
-
+            var sb = new StringBuilder();
+            sb.AppendFormat("CONNECT {0}:{1} HTTP/{2}\r\n", destinationHost, destinationPort, ProtocolVersion);
+            sb.AppendFormat(GenerateAuthorizationHeader());
+            sb.Append("Host: "); sb.AppendLine(destinationHost);
+            sb.AppendLine("Proxy-Connection: Keep-Alive");
+            sb.AppendLine();
+
+            var buffer = Encoding.ASCII.GetBytes(sb.ToString());
             nStream.Write(buffer, 0, buffer.Length);
         }
 

Leaf.xNet/~Proxy/ProxyClient.cs

@@ -152,7 +152,7 @@ public int ReadWriteTimeout
         /// Если задано <see langword="false"/> - всегда будет использован относительный адрес в заголовке запроса.
         /// </summary>
         // ReSharper disable once MemberCanBePrivate.Global
-        public bool AbsoluteUriInStartingLine { get; set; } = true;
+        public bool AbsoluteUriInStartingLine { get; set; }
 
         #endregion
 
@@ -215,8 +215,6 @@ public static HttpProxyClient DebugHttpProxy {
                     return _debugHttpProxy;
 
                 _debugHttpProxy = HttpProxyClient.Parse("127.0.0.1:8888");
-                _debugHttpProxy.AbsoluteUriInStartingLine = false; // Fix tree Charles bug 
-
                 return _debugHttpProxy;
             }
         }

appveyor.yml

@@ -28,14 +28,8 @@ build:
   publish_nuget: true
   verbosity: minimal
 artifacts:
-- path: Leaf.xNet\bin\Release\net452
-  name: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.5.2
-- path: Leaf.xNet\bin\Release\net462
-  name: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.6.2
-- path: Leaf.xNet\bin\Release\net472
-  name: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.7.2
-- path: Leaf.xNet\bin\Release\net48
-  name: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.8
+- path: Leaf.xNet\bin\Release\net45
+  name: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.5
 - path: Leaf.xNet\bin\Release\netstandard2.0
   name: Leaf.xNet_v$(appveyor_build_version)__NET_Standard_2.0
 deploy:
@@ -50,7 +44,7 @@ deploy:
   release: Leaf.xNet v$(appveyor_build_version)
   auth_token:
     secure: NQtMOO3yB309cDK/pFWRiQ==
-  artifact: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.5.2;Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.6.2;Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.7.2;Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.8;Leaf.xNet_v$(appveyor_build_version)__NET_Standard_2.0
+  artifact: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.5;Leaf.xNet_v$(appveyor_build_version)__NET_Standard_2.0
   on:
     branch: master
 only_commits: