我的解决方案基于mikebridge的解决方案，但我不得不做一些改动。必须包含初始化程序，如果您尝试在不可用的阶段访问soap 消息信息，则会引发异常。
public class SoapLoggingExtension : SoapExtension
{
private Stream _originalStream;
private Stream _workingStream;
private static String _initialMethodName;
private static string _methodName;
private static String _xmlResponse;
/// <summary>
/// Side effects: saves the incoming stream to
/// _originalStream, creates a new MemoryStream
/// in _workingStream and returns it.
/// Later, _workingStream will have to be created
/// </summary>
/// <param name="stream"></param>
/// <returns></returns>
public override Stream ChainStream(Stream stream)
{
_originalStream = stream;
_workingStream = new MemoryStream();
return _workingStream;
}
/// <summary>
/// Process soap message
/// </summary>
/// <param name="message"></param>
public override void ProcessMessage(SoapMessage message)
{
switch (message.Stage)
{
case SoapMessageStage.BeforeSerialize:
break;
case SoapMessageStage.AfterSerialize:
//Get soap call as a xml string
var xmlRequest = GetSoapEnvelope(_workingStream);
//Save the inbound method name
_methodName = message.MethodInfo.Name;
CopyStream(_workingStream, _originalStream);
//Log call
LogSoapRequest(xmlRequest, _methodName, LogObject.Direction.OutPut);
break;
case SoapMessageStage.BeforeDeserialize:
CopyStream(_originalStream, _workingStream);
//Get xml string from stream before it is used
_xmlResponse = GetSoapEnvelope(_workingStream);
break;
case SoapMessageStage.AfterDeserialize:
//Method name is only available after deserialize
_methodName = message.MethodInfo.Name;
LogSoapRequest(_xmlResponse, _methodName, LogObject.Direction.InPut);
break;
}
}
/// <summary>
/// Returns the XML representation of the Soap Envelope in the supplied stream.
/// Resets the position of stream to zero.
/// </summary>
private String GetSoapEnvelope(Stream stream)
{
stream.Position = 0;
StreamReader reader = new StreamReader(stream);
String data = reader.ReadToEnd();
stream.Position = 0;
return data;
}
private void CopyStream(Stream from, Stream to)
{
TextReader reader = new StreamReader(from);
TextWriter writer = new StreamWriter(to);
writer.WriteLine(reader.ReadToEnd());
writer.Flush();
}
public override object GetInitializer(Type serviceType)
{
return serviceType.FullName;
}
//Never needed to use this initializer, but it has to be implemented
public override object GetInitializer(LogicalMethodInfo methodInfo, SoapExtensionAttribute attribute)
{
throw new NotImplementedException();
//return ((TraceExtensionAttribute)attribute).Filename;
}
public override void Initialize(object initializer)
{
if (String.IsNullOrEmpty(_methodName))
{
_initialMethodName = _methodName;
_waitForResponse = false;
}
}
private void LogSoapRequest(String xml, String methodName, LogObject.Direction direction)
{
String connectionString = String.Empty;
String callerIpAddress = String.Empty;
String ipAddress = String.Empty;
try
{
//Only log outbound for the response to the original call
if (_waitForResponse && xml.IndexOf("<" + _initialMethodName + "Response") < 0)
{
return;
}
if (direction == LogObject.Direction.InPut) {
_waitForResponse = true;
_initialMethodName = methodName;
}
connectionString = GetSqlConnectionString();
callerIpAddress = GetClientIp();
ipAddress = GetClientIp(HttpContext.Current.Request.UserHostAddress);
//Log call here
if (!String.IsNullOrEmpty(_methodName) && xml.IndexOf("<" + _initialMethodName + "Response") > 0)
{
//Reset static values to initial
_methodName = String.Empty;
_initialMethodName = String.Empty;
_waitForResponse = false;
}
}
catch (Exception ex)
{
//Error handling here
}
}
private static string GetClientIp(string ip = null)
{
if (String.IsNullOrEmpty(ip))
{
ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
}
if (String.IsNullOrEmpty(ip) || ip.Equals("unknown", StringComparison.OrdinalIgnoreCase))
{
ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}
if (ip == "::1")
ip = "127.0.0.1";
return ip;
}
}
methodName 变量用于确定我们正在等待响应的入站呼叫。这当然是可选的，但在我的解决方案中，我对其他 Web 服务进行了几次调用，但我只想记录对第一次调用的响应。
第二部分是您需要在 web.config 中添加正确的行。显然它对不包括整个类类型定义很敏感（在这个例子中，只定义了类名，这不起作用。该类从未初始化。）：
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.web>
<webServices>
<soapExtensionTypes>
<add group="High" priority="1" type="WsNs.SoapLoggingExtension, WsNs, Version=1.0.0.0, Culture=neutral" />
</soapExtensionTypes>
</webServices>
</system.web>
</configuration>