动态方法调用 为什么不安全 关于C#调用WebServices的方法(4)

以上Soap1.2示例相应代码如下

        public static string SoapV1_2WebService(String URL, String MethodName, Hashtable Pars, string XmlNs)
        {
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);
            request.Method = "POST";
            request.ContentType = "application/soap+xml; charset=utf-8";

            // 凭证
            request.Credentials = CredentialCache.DefaultCredentials;
            //超时时间
            request.Timeout = 10000;
            byte[] data = HashtableToSoap12(Pars, XmlNs, MethodName);
            request.ContentLength = data.Length;
            Stream writer = request.GetRequestStream();
            writer.Write(data, 0, data.Length);
            writer.Close();
            var response = request.GetResponse();
            XmlDocument doc = new XmlDocument();
            StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            String retXml = sr.ReadToEnd();
            sr.Close();
            doc.LoadXml(retXml);
            XmlNamespaceManager mgr = new XmlNamespaceManager(doc.NameTable);
            mgr.AddNamespace("soap12", "http://www.w3.org/2003/05/soap-envelope");
            String xmlStr = doc.SelectSingleNode("//soap12:Body/*/*", mgr).InnerXml;

            return xmlStr;
        }

        private static byte[] HashtableToSoap12(Hashtable ht, String XmlNs, String MethodName)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml("<soap12:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap12=\"http://www.w3.org/2003/05/soap-envelope\"></soap12:Envelope>");
            XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null);
            doc.InsertBefore(decl, doc.DocumentElement);
            XmlElement soapBody = doc.CreateElement("soap12", "Body", "http://www.w3.org/2003/05/soap-envelope");

            XmlElement soapMethod = doc.CreateElement(MethodName);
            soapMethod.SetAttribute("xmlns", XmlNs);
            foreach (string k in ht.Keys)
            {

                XmlElement soapPar = doc.CreateElement(k);
                soapPar.InnerXml = ObjectToSoapXml(ht[k]);
                soapMethod.AppendChild(soapPar);
            }
            soapBody.AppendChild(soapMethod);
            doc.DocumentElement.AppendChild(soapBody);
            return Encoding.UTF8.GetBytes(doc.OuterXml);
        }
        private static string ObjectToSoapXml(object o)
        {
            XmlSerializer mySerializer = new XmlSerializer(o.GetType());
            MemoryStream ms = new MemoryStream();
            mySerializer.Serialize(ms, o);
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(Encoding.UTF8.GetString(ms.ToArray()));
            if (doc.DocumentElement != null)
            {
                return doc.DocumentElement.InnerXml;
            }
            else
            {
                return o.ToString();
            }
        }

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