Log Web Service Soap Request and Response

using System;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.IO;
using System.Net;
 
public class TraceExtension : SoapExtension
{
	Stream oldStream;
	Stream newStream;
	string filename;
 
	public override Stream ChainStream( Stream stream )
    {
        // Save the Stream representing the SOAP request or SOAP response into
        // a local memory buffer.
		oldStream = stream;
		newStream = new MemoryStream();
        return newStream;
	}
	public override object GetInitializer(LogicalMethodInfo methodInfo, SoapExtensionAttribute attribute)
    {
        return ((TraceExtensionAttribute)attribute).Filename;
	}
	public override object GetInitializer(Type WebServiceType)
    {
        return "C:\\" + WebServiceType.FullName + ".log";    
	}
	public override void Initialize(object initializer) 
	{
        filename = (string)initializer;
	}
	public override void ProcessMessage(SoapMessage message) 
	{
        //  If the SoapMessageStage is such that the SoapRequest or
        //  SoapResponse is still in the SOAP format to be sent or received,
        //  save it out to a file.
        WriteOutput(message);
		switch (message.Stage) 
		{
			case SoapMessageStage.BeforeSerialize:
				break;
			case SoapMessageStage.AfterSerialize:
				//WriteOutput(message);
				break;
			case SoapMessageStage.BeforeDeserialize:
				//WriteInput(message);
				break;
			case SoapMessageStage.AfterDeserialize:
				break;
			default:
				throw new Exception("invalid stage");
		}
	}
 
	public void WriteOutput(SoapMessage message)
    {
 
        // create a writer and open the file
        TextWriter tw = new StreamWriter("C:\\Danny.txt");
 
        // write a line of text to the file
        tw.WriteLine(DateTime.Now);
 
        // close the stream
        tw.Close();
        //newStream.Position = 0;
        //FileStream fs = new FileStream(filename, FileMode.Append, FileAccess.Write);
        //StreamWriter w = new StreamWriter(fs);
 
        //string soapString = (message is SoapServerMessage) ? "SoapResponse" : "SoapRequest";
        //w.WriteLine("-----" + soapString + " at " + DateTime.Now);
        //w.Flush();
        //Copy(newStream, fs);
        //w.Close();
        //newStream.Position = 0;
        //Copy(newStream, oldStream);
	}
	public void WriteInput(SoapMessage message)
    {
 
        // create a writer and open the file
        TextWriter tw = new StreamWriter("Danny.txt");
 
        // write a line of text to the file
        tw.WriteLine(DateTime.Now);
 
        // close the stream
        tw.Close();
        //Copy(oldStream, newStream);
        //FileStream fs = new FileStream(filename, FileMode.Append, FileAccess.Write);
        //StreamWriter w = new StreamWriter(fs);
 
        //string soapString = (message is SoapServerMessage) ? "SoapRequest" : "SoapResponse";
        //w.WriteLine("-----" + soapString + " at " + DateTime.Now);
        //w.Flush();
        //newStream.Position = 0;
        //Copy(newStream, fs);
        //w.Close();
        //newStream.Position = 0;
	}
	void Copy(Stream from, Stream to) 
	{
		TextReader reader = new StreamReader(from);
		TextWriter writer = new StreamWriter(to);
		writer.WriteLine(reader.ReadToEnd());
		writer.Flush();
	}
 
// Create a SoapExtensionAttribute for the SOAP Extension that can be applied to a Web service method.
[AttributeUsage(AttributeTargets.Method)]
public class TraceExtensionAttribute : SoapExtensionAttribute 
{
    private string filename = "c:\\log.txt";
	private int priority;
 
	public override Type ExtensionType 
	{
		get { return typeof(TraceExtension); }
	}
	public override int Priority 
	{
		get { return priority; }
		set { priority = value; }
	}
    public string Filename
    {
        get
        {
            return filename;
        }
        set
        {
            filename = value;
        }
    }
}
 
}
                                              

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