using System;

using System.Collections;

using System.IO;

using System.Net;

using System.Text;

using System.Xml;

using System.Xml.Serialization;

namespace Hishop.Plugins

{

  /// <summary>

  /// 利用WebRequest/WebResponse进行WebService调用的类

  /// </summary>

  public class WebServiceCaller

  {

    #region Tip:使用说明

    //webServices 应该支持Get和Post调用，在web.config应该增加以下代码

    //<webServices>

    // <protocols>

    //  <add name="HttpGet"/>

    //  <add name="HttpPost"/>

    // </protocols>

    //</webServices>

    //调用示例：

    //Hashtable ht = new Hashtable(); //Hashtable 为webservice所需要的参数集

    //ht.Add("str", "test");

    //ht.Add("b", "true");

    //XmlDocument xx = WebSvcCaller.QuerySoapWebService("http://localhost:81/service.asmx", "HelloWorld", ht);

    //MessageBox.Show(xx.OuterXml);

    #endregion

    /// <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, String MethodName, 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, String MethodName, Hashtable Pars)

    {

      if (_xmlNamespaces.ContainsKey(URL))

      {

        return QuerySoapWebService(URL, MethodName, Pars, _xmlNamespaces[URL].ToString());

      }

      else

      {

        return QuerySoapWebService(URL, MethodName, Pars, GetNamespace(URL));

      }

    }

    private static XmlDocument QuerySoapWebService(String URL, String MethodName, 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;

    }

    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());

      sr.Close();

      return doc.SelectSingleNode("//@targetNamespace").Value;

    }

    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_x_x("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");

      XmlElement soapBody = doc.CreateElement("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");

      //XmlElement soapMethod = doc.createElement_x_x(MethodName);

      XmlElement soapMethod = doc.CreateElement(MethodName);

      soapMethod.SetAttribute("xmlns", XmlNs);

      foreach (string k in Pars.Keys)

      {

        //XmlElement soapPar = doc.createElement_x_x(k);

        XmlElement soapPar = doc.CreateElement(k);

        soapPar.InnerXml = ObjectToSoapXml(Pars[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();

      }

    }

    /// <summary>

    /// 设置凭证与超时时间

    /// </summary>

    /// <param name="request"></param>

    private static void SetWebRequest(HttpWebRequest request)

    {

      request.Credentials = CredentialCache.DefaultCredentials;

      request.Timeout = 10000;

    }

    private static void WriteRequestData(HttpWebRequest request, byte[] data)

    {

      request.ContentLength = data.Length;

      Stream writer = request.GetRequestStream();

      writer.Write(data, 0, data.Length);

      writer.Close();

    }

    private static byte[] EncodePars(Hashtable Pars)

    {

      return Encoding.UTF8.GetBytes(ParsToString(Pars));

    }

    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();

    }

    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;

    }

    private static void AddDelaration(XmlDocument doc)

    {

      XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null);

      doc.InsertBefore(decl, doc.DocumentElement);

    }

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

  }

}

//调用并读取解析返回结果

 DataSet ds = new DataSet();

    XmlNode xmlNode1;

    XmlDataDocument xd = new XmlDataDocument();

    StringBuilder sb;

    Hashtable ht = new Hashtable();

    ht.Add("xmlIn", "<Request><MemCode>001</MemCode></Request>");

    xmlNode1 = Hishop.Plugins.WebServiceCaller.QuerySoapWebService("http://xxx.xxxx.com/Service.asmx", "SinPointQuery", ht);

    if (xmlNode1 == null)

    {

      return;

    }

    string xmlstr= HttpUtility.HtmlDecode(xmlNode1.OuterXml);

    sb = new StringBuilder(xmlstr);

    if (sb.ToString().Equals(""))

    {

      return;

    }

    xd.LoadXml(sb.ToString());

    ds.ReadXml(new XmlNodeReader(xd));

    //ds可以返回出结果集