Fix for #593 and #596

Author: honfika

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

@@ -0,0 +1,16 @@
+using System;
+
+namespace Titanium.Web.Proxy.Extensions
+{
+    internal static class UriExtensions
+    {
+        internal static string GetOriginalPathAndQuery(this Uri uri)
+        {
+            string leftPart = uri.GetLeftPart(UriPartial.Authority);
+            if (uri.OriginalString.StartsWith(leftPart))
+                return uri.OriginalString.Substring(leftPart.Length);
+
+            return uri.IsWellFormedOriginalString() ? uri.PathAndQuery : uri.GetComponents(UriComponents.PathAndQuery, UriFormat.Unescaped);
+        }
+    }
+}

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

@@ -104,8 +104,7 @@ internal async Task SendRequest(bool enable100ContinueBehaviour, bool isTranspar
             }
             else
             {
-                var uri = Request.RequestUri;
-                url = uri.IsWellFormedOriginalString() ? uri.PathAndQuery : uri.GetComponents(UriComponents.PathAndQuery, UriFormat.Unescaped);
+                url = Request.RequestUri.GetOriginalPathAndQuery();
             }
 
             // prepare the request & headers

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

@@ -327,6 +327,9 @@ private async Task<TcpServerConnection> createServerConnection(string remoteHost
                         {
                             throw new Exception($"Could not establish connection to {hostname}", e);
                         }
+
+                        // dispose the current TcpClient and try the next address
+                        tcpClient?.Dispose();
                     }
                 }