WebService

手动写webservice，代码代码如下：

using System;
using System.Web;
using System.Xml;
using System.Collections;
using System.Net;
using System.Text;
using System.IO;




/// <summary>
/// 利用WebRequest/WebResponse进行WebService调用的类
/// </summary>
namespace HuaSpace
{
    public class WebSvcCaller
    {
        //<webServices>
        //  <protocols>
        //    <add name="HttpGet"/>
        //    <add name="HttpPost"/>
        //  </protocols>
        //</webServices>


        private static Hashtable _xmlNamespaces = new Hashtable();//缓存xmlNamespace，避免重复调用GetNamespace


        
        /// <summary>
        /// 需要WebService支持Post调用
        /// </summary>
        public static XmlDocument QueryPostWebService(String URL,String MethodName,Hashtable Pars)
        {
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName);
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            SetWebRequest(request);
            byte[] data = EncodePars(Pars);
            WriteRequestData(request,data);


            return ReadXmlResponse(request.GetResponse());
        }
        
        /// <summary>
        /// 需要WebService支持Get调用
        /// </summary>
        public static XmlDocument QueryGetWebService(String URL,Hashtable Pars)
        {
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName + "?" + ParsToString(Pars));
            request.Method = "GET";
            request.ContentType = "application/x-www-form-urlencoded";
            SetWebRequest(request);
            return ReadXmlResponse(request.GetResponse());
        }


        /// <summary>
        /// 通用WebService调用(Soap),参数Pars为String类型的参数名、参数值
        /// </summary>
        public static XmlDocument QuerySoapWebService(String URL,Hashtable Pars)
        {
            //
            if (_xmlNamespaces.ContainsKey(URL))
            {
                return QuerySoapWebService(URL,MethodName,Pars,_xmlNamespaces[URL].ToString());
            }
            else
            {
                return QuerySoapWebService(URL,GetNamespace(URL));
            }
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="URL"></param>
        /// <param name="MethodName"></param>
        /// <param name="Pars"></param>
        /// <param name="XmlNs"></param>
        /// <returns></returns>
        private static XmlDocument QuerySoapWebService(String URL,Hashtable Pars,string XmlNs)
        {
            _xmlNamespaces[URL] = XmlNs;//加入缓存，提高效率
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);
            request.Method = "POST";
            request.ContentType = "text/xml; charset=utf-8";
            request.Headers.Add("SOAPAction",""" + XmlNs + (XmlNs.EndsWith("/") ? "" : "/") + MethodName + """);
            SetWebRequest(request);
            byte[] data = EncodeParsToSoap(Pars,XmlNs,MethodName);
            WriteRequestData(request,data);
            XmlDocument doc = new XmlDocument(),doc2 = new XmlDocument();
            doc = ReadXmlResponse(request.GetResponse());


            XmlNamespaceManager mgr = new XmlNamespaceManager(doc.NameTable);
            mgr.AddNamespace("soap","http://schemas.xmlsoap.org/soap/envelope/");
            String RetXml = doc.SelectSingleNode("//soap:Body/*",mgr).InnerXml;
            doc2.LoadXml("<root>" + RetXml + "</root>");
            AddDelaration(doc2);
            return doc2;
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="URL"></param>
        /// <returns></returns>
        private static string GetNamespace(String URL)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL + "?WSDL");
            SetWebRequest(request);
            WebResponse response = request.GetResponse();
            StreamReader sr = new StreamReader(response.GetResponseStream(),Encoding.UTF8);
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(sr.ReadToEnd());
            return doc.SelectSingleNode("//@targetNamespace").Value;
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="Pars"></param>
        /// <param name="XmlNs"></param>
        /// <param name="MethodName"></param>
        /// <returns></returns>
        private static byte[] EncodeParsToSoap(Hashtable Pars,String XmlNs,String MethodName)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml("<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"></soap:Envelope>");
            AddDelaration(doc);
            XmlElement soapBody = doc.CreateElement("soap","Body","http://schemas.xmlsoap.org/soap/envelope/");
            XmlElement soapMethod = doc.CreateElement(MethodName);
            soapMethod.SetAttribute("xmlns",XmlNs);
            foreach (string k in Pars.Keys)
            {
                XmlElement soapPar = doc.CreateElement(k);
                soapPar.InnerText = Pars[k].ToString();
                soapMethod.AppendChild(soapPar);
            }
            soapBody.AppendChild(soapMethod);
            doc.DocumentElement.AppendChild(soapBody);
            return Encoding.UTF8.GetBytes(doc.OuterXml);
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="request"></param>
        private static void SetWebRequest(HttpWebRequest request)
        {
            request.Credentials = CredentialCache.DefaultCredentials;
            request.Timeout = 10000;
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="request"></param>
        /// <param name="data"></param>
        private static void WriteRequestData(HttpWebRequest request,byte[] data)
        {
            request.ContentLength = data.Length;
            Stream writer = request.GetRequestStream();
            writer.Write(data,data.Length);
            writer.Close();
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="Pars"></param>
        /// <returns></returns>
        private static byte[] EncodePars(Hashtable Pars)
        {
            return Encoding.UTF8.GetBytes(ParsToString(Pars));
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="Pars"></param>
        /// <returns></returns>
        private static String ParsToString(Hashtable Pars)
        {
            StringBuilder sb = new StringBuilder();
            foreach (string k in Pars.Keys)
            {
                if (sb.Length > 0)
                {
                    sb.Append("&");
                }
                sb.Append(HttpUtility.UrlEncode(k) + "=" + HttpUtility.UrlEncode(Pars[k].ToString()));
            }
            return sb.ToString();
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="response"></param>
        /// <returns></returns>
        private static XmlDocument ReadXmlResponse(WebResponse response)
        {
            StreamReader sr = new StreamReader(response.GetResponseStream(),Encoding.UTF8);
            String retXml = sr.ReadToEnd();
            sr.Close();
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(retXml);
            return doc;
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="doc"></param>
        private static void AddDelaration(XmlDocument doc)
        {
            XmlDeclaration decl = doc.CreateXmlDeclaration("1.0","utf-8",null);
            doc.InsertBefore(decl,doc.DocumentElement);
        }
    }


}