beta

examples/Titanium.Web.Proxy.Examples.Basic/ProxyTestController.cs

@@ -90,8 +90,12 @@ public void StartProxy()
             //};
 
             //proxyServer.AddEndPoint(transparentEndPoint);
-            //proxyServer.UpStreamHttpProxy = new ExternalProxy() { HostName = "localhost", Port = 8888 };
-            //proxyServer.UpStreamHttpsProxy = new ExternalProxy() { HostName = "localhost", Port = 8888 };
+            //proxyServer.UpStreamHttpProxy = new ExternalProxy("localhost", 8888);
+            //proxyServer.UpStreamHttpsProxy = new ExternalProxy("localhost", 8888);
+
+            // SOCKS proxy
+            //proxyServer.UpStreamHttpProxy = new ExternalProxy("46.63.0.17", 4145) { ProxyType = ExternalProxyType.Socks4 };
+            //proxyServer.UpStreamHttpsProxy = new ExternalProxy("46.63.0.17", 4145) { ProxyType = ExternalProxyType.Socks4 };
 
             foreach (var endPoint in proxyServer.ProxyEndPoints)
             {

src/Titanium.Web.Proxy/Extensions/TcpExtensions.cs

@@ -5,38 +5,18 @@ namespace Titanium.Web.Proxy.Extensions
 {
     internal static class TcpExtensions
     {
-        internal static void CloseSocket(this TcpClient tcpClient)
-        {
-            if (tcpClient == null)
-            {
-                return;
-            }
-
-            try
-            {
-                tcpClient.Close();
-            }
-            catch
-            {
-                // ignored
-            }
-        }
-
-
         /// <summary>
         ///     Check if a TcpClient is good to be used.
         ///     This only checks if send is working so local socket is still connected.
         ///     Receive can only be verified by doing a valid read from server without exceptions.
         ///     So in our case we should retry with new connection from pool if first read after getting the connection fails.
         ///     https://msdn.microsoft.com/en-us/library/system.net.sockets.socket.connected(v=vs.110).aspx
         /// </summary>
-        /// <param name="client"></param>
+        /// <param name="socket"></param>
         /// <returns></returns>
-        internal static bool IsGoodConnection(this TcpClient client)
+        internal static bool IsGoodConnection(this Socket socket)
         {
-            var socket = client.Client;
-
-            if (!client.Connected || !socket.Connected)
+            if (!socket.Connected)
             {
                 return false;
             }

src/Titanium.Web.Proxy/Http/HttpWebClient.cs

@@ -2,6 +2,7 @@
 using System.Net;
 using System.Threading;
 using System.Threading.Tasks;
+using Titanium.Web.Proxy.Models;
 using Titanium.Web.Proxy.Network.Tcp;
 
 namespace Titanium.Web.Proxy.Http
@@ -103,10 +104,14 @@ internal async Task SendRequest(bool enable100ContinueBehaviour, bool isTranspar
         {
             var upstreamProxy = Connection.UpStreamProxy;
 
-            bool useUpstreamProxy = upstreamProxy != null && Connection.IsHttps == false;
+            bool useUpstreamProxy = upstreamProxy != null && upstreamProxy.ProxyType == ExternalProxyType.Http &&
+                                    !Connection.IsHttps;
 
             var serverStream = Connection.Stream;
 
+            string? upstreamProxyUserName = null;
+            string? upstreamProxyPassword = null;
+
             string url;
             if (!useUpstreamProxy || isTransparent)
             {
@@ -115,19 +120,13 @@ internal async Task SendRequest(bool enable100ContinueBehaviour, bool isTranspar
             else
             {
                 url = Request.RequestUri.ToString();
-            }
-
-            string? upstreamProxyUserName = null;
-            string? upstreamProxyPassword = null;
 
-            // Send Authentication to Upstream proxy if needed
-            if (!isTransparent && upstreamProxy != null
-                               && Connection.IsHttps == false
-                               && !string.IsNullOrEmpty(upstreamProxy.UserName)
-                               && upstreamProxy.Password != null)
-            {
-                upstreamProxyUserName = upstreamProxy.UserName;
-                upstreamProxyPassword = upstreamProxy.Password;
+                // Send Authentication to Upstream proxy if needed
+                if (!string.IsNullOrEmpty(upstreamProxy!.UserName) && upstreamProxy.Password != null)
+                {
+                    upstreamProxyUserName = upstreamProxy.UserName;
+                    upstreamProxyPassword = upstreamProxy.Password;
+                }
             }
 
             // prepare the request & headers

src/Titanium.Web.Proxy/Models/ExternalProxy.cs

@@ -25,6 +25,8 @@ public class ExternalProxy : IExternalProxy
         /// </summary>
         public bool BypassLocalhost { get; set; }
 
+        public ExternalProxyType ProxyType { get; set; }
+
         /// <summary>
         ///     Username.
         /// </summary>
@@ -111,4 +113,16 @@ public override string ToString()
             return $"{HostName}:{Port}";
         }
     }
+
+    public enum ExternalProxyType
+    {        
+        /// <summary>A HTTP/HTTPS proxy server.</summary>
+        Http,
+
+        /// <summary>A SOCKS4[A] proxy server.</summary>
+        Socks4,
+
+        /// <summary>A SOCKS5 proxy server.</summary>
+        Socks5
+    }
 }

src/Titanium.Web.Proxy/Models/IExternalProxy.cs

@@ -12,6 +12,8 @@ public interface IExternalProxy
         /// </summary>
         bool BypassLocalhost { get; set; }
 
+        ExternalProxyType ProxyType { get; set; }
+
         /// <summary>
         ///     Username.
         /// </summary>

src/Titanium.Web.Proxy/Network/Tcp/TcpClientConnection.cs

@@ -18,9 +18,9 @@ internal class TcpClientConnection : IDisposable
     {
         public object ClientUserData { get; set; }
 
-        internal TcpClientConnection(ProxyServer proxyServer, TcpClient tcpClient)
+        internal TcpClientConnection(ProxyServer proxyServer, Socket tcpClientSocket)
         {
-            this.tcpClient = tcpClient;
+            this.tcpClientSocket = tcpClientSocket;
             this.proxyServer = proxyServer;
             this.proxyServer.UpdateClientConnectionCount(true);
         }
@@ -29,21 +29,21 @@ internal TcpClientConnection(ProxyServer proxyServer, TcpClient tcpClient)
 
         public Guid Id { get; } = Guid.NewGuid();
 
-        public EndPoint LocalEndPoint => tcpClient.Client.LocalEndPoint;
+        public EndPoint LocalEndPoint => tcpClientSocket.LocalEndPoint;
 
-        public EndPoint RemoteEndPoint => tcpClient.Client.RemoteEndPoint;
+        public EndPoint RemoteEndPoint => tcpClientSocket.RemoteEndPoint;
 
         internal SslProtocols SslProtocol { get; set; }
 
         internal SslApplicationProtocol NegotiatedApplicationProtocol { get; set; }
 
-        private readonly TcpClient tcpClient;
+        private readonly Socket tcpClientSocket;
 
         private int? processId;
 
         public Stream GetStream()
         {
-            return tcpClient.GetStream();
+            return new NetworkStream(tcpClientSocket, true);
         }
 
         public int GetProcessId(ProxyEndPoint endPoint)
@@ -86,7 +86,15 @@ public void Dispose()
                 // This way we can push tcp Time_Wait to client side when possible.
                 await Task.Delay(1000);
                 proxyServer.UpdateClientConnectionCount(false);
-                tcpClient.CloseSocket();
+
+                try
+                {
+                    tcpClientSocket.Close();
+                }
+                catch
+                {
+                    // ignore
+                }
             });
         }
     }