Windows WCF client with internet proxy server showing error The server committed a protocol violation. Section=ResponseStatusLine

Question

Our team trying to create a windows application(c#) to call a WCF service using internet proxy server

Showing exception "The server committed a protocol violation. Section=ResponseStatusLine" while calling WCF service

Please give suggestion to solve this problem/any other alternative solution

//Code for creating proxy
public static DevicesServiceClient CreateProxy()
{
  var proxy = new DevicesServiceClient("BasicHttpBinding_IDevicesService");

  BasicHttpBinding binding = new BasicHttpBinding();
  binding.Security.Mode = BasicHttpSecurityMode.None;
  binding.Security.Transport.ProxyCredentialType = HttpProxyCredentialType.None;
  binding.UseDefaultWebProxy = false;
  binding.ProxyAddress = new Uri(string.Format("http://{0}:{1}", "192.168.0.20","808"));
  proxy.Endpoint.Binding = binding;

  proxy.ClientCredentials.UserName.UserName = "Username";
  proxy.ClientCredentials.UserName.Password = "Password";
}

Server stack trace:

at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWebRequest request, HttpAbortReason abortReason)
at ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at DevicesService.IDevicesService.CheckNetworkConnection(String ipAddress)

My client side code in app.config

My server side code in web.config

Answer 1

I haven't seen this exception before but I already had big problems to make proxy work this way. I don't know why but setting proxy address and use default proxy to false in BasicHttpBinding never worked for me. I always had to use default web proxy and set the URL there or create whole new custom binding and set proxy URL in http transport binding element.

Answer 2

Try checking the headers returned by your proxy server. It looks like malformed/non standard headers cause this exception.

http://www.velocityreviews.com/forums/t302174-why-do-i-get-the-server-committed-a-protocol-violation.html