Web Service中在 SOAP扩展类 中处理Request/Response

Question

(C#/.net 新手)在做一Web Service, 过程是用SOAP协议，我要做的是解析 Client 端发过来的 POST/GET的 XML流, 完了产生一个XML流返回给Client

查了下，需要用到SOAP扩展重写SoapExtension和SoapExtensionAttribute去做，但是有个问题是目前不太了解重新建立的XML流如何交给返回的数据流

public override void ProcessMessage(SoapMessage message)
{
switch (message.Stage)
{
case SoapMessageStage.BeforeSerialize:
break;
case SoapMessageStage.AfterSerialize:
Output(message);
break;
case SoapMessageStage.BeforeDeserialize:
Input(message);
break;
case SoapMessageStage.AfterDeserialize:
break;
default:
throw new Exception("invalid stage");
}
}

Answer 1

方法:
在序列化之后进行xml的改写

 public void WriteOutput(SoapMessage message)// AfterSerialize后,服务器返回xml数据,_oldStream为空,改写_newStream
        {
            FileStream fs;
            StreamWriter w = null; 

            try
            {
                if (_logTypeMode.Equals(LogType.RequestOnly) || _logTypeMode.Equals(LogType.RequestReponse))
                {
                    _newStream.Position = 0;
                    // 改掉_newStream的内容
                    fs = new FileStream(_reqFilename, FileMode.Append, FileAccess.Write);
                    w = new StreamWriter(fs);
                    try { 
                        StringBuilder sb = new StringBuilder();
                        sb.Append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
                        sb.Append("<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">");
                        sb.Append("<soap:Body>");
                        sb.Append("<HelloWorldResponse xmlns=\"http://tempuri.org/\">");
                        sb.Append("<HelloWorldResult>Hello World Service 1234567 - ````````222222222</HelloWorldResult>");
                        sb.Append("</HelloWorldResponse>");
                        sb.Append("</soap:Body>");
                        sb.Append("</soap:Envelope>");

                        byte[] strBytes = Encoding.ASCII.GetBytes(sb.ToString());

                        Copy(new MemoryStream(strBytes), _newStream);
                    }catch(Exception ex){
                        w.WriteLine("Error Writting");
                        w.Flush();
                    }


                    _newStream.Position = 0;
                    string soapString = "Server-SoapResponse";
                    w.WriteLine("-----" + soapString + " at 11111xOutput _newStream" + DateTime.Now);
                    w.Flush();
                    Copy(_newStream, fs);

                    w.Close();

                }
            }
            catch (Exception ex)
            {
            }
            finally
            {
                if (w != null) w.Close();
                _newStream.Position = 0;
                Copy(_newStream, _oldStream);

            }
        }