Merge pull request #343 from justcoding121/develop

Include exception data when listener faield to start

Author: honfika

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

@@ -89,7 +89,6 @@ public void StartProxy()
             proxyServer.AddEndPoint(explicitEndPoint);
             proxyServer.Start();
 
-
             //Transparent endpoint is useful for reverse proxy (client is not aware of the existence of proxy)
             //A transparent endpoint usually requires a network router port forwarding HTTP(S) packets or DNS
             //to send data to this endPoint

Titanium.Web.Proxy/Models/EndPoint.cs

@@ -25,8 +25,7 @@ protected ProxyEndPoint(IPAddress ipAddress, int port, bool enableSsl)
             Port = port;
             EnableSsl = enableSsl;
         }
-
-
+        
         /// <summary>
         /// underlying TCP Listener object
         /// </summary>
@@ -53,7 +52,6 @@ protected ProxyEndPoint(IPAddress ipAddress, int port, bool enableSsl)
         public bool IpV6Enabled => Equals(IpAddress, IPAddress.IPv6Any)
                                    || Equals(IpAddress, IPAddress.IPv6Loopback)
                                    || Equals(IpAddress, IPAddress.IPv6None);
-
     }
 
     /// <summary>

Titanium.Web.Proxy/ProxyServer.cs

@@ -646,11 +646,22 @@ public void Dispose()
         private void Listen(ProxyEndPoint endPoint)
         {
             endPoint.Listener = new TcpListener(endPoint.IpAddress, endPoint.Port);
-            endPoint.Listener.Start();
+            try
+            {
+                endPoint.Listener.Start();
 
-            endPoint.Port = ((IPEndPoint)endPoint.Listener.LocalEndpoint).Port;
-            // accept clients asynchronously
-            endPoint.Listener.BeginAcceptTcpClient(OnAcceptConnection, endPoint);
+                endPoint.Port = ((IPEndPoint)endPoint.Listener.LocalEndpoint).Port;
+
+                // accept clients asynchronously
+                endPoint.Listener.BeginAcceptTcpClient(OnAcceptConnection, endPoint);
+            }
+            catch (SocketException ex)
+            {
+                var pex = new Exception($"Endpoint {endPoint} failed to start. Check inner exception and exception data for details.", ex);
+                pex.Data.Add("ipAddress", endPoint.IpAddress);
+                pex.Data.Add("port", endPoint.Port);
+                throw pex;
+            }
         }
 
         /// <summary>