using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;
using System.Xml;
using System.Xml.Serialization;
using Newtonsoft.Json;
using HZQR.Common;

namespace Personnel.WebSite.Shanxi
{
    /// <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, false));
            }
        }

        private static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars, string XmlNs)
        {
            LogUtil.WriteLog(null, "JSPSoap接口命名空间：" + XmlNs + "，MethodName:" + MethodName,
                "同步用户信息" + DateTime.Now.ToString("yyyy-MM-dd"));
            _xmlNamespaces[URL] = XmlNs;//加入缓存，提高效率

            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);
            request.ServicePoint.Expect100Continue = false;
            request.Method = "POST";
            request.ContentType = "application/soap+xml;charset=UTF-8";
            request.Credentials = CredentialCache.DefaultCredentials;
            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();

            LogUtil.WriteLog(null, "RequestData：" + JsonConvert.SerializeObject(request),
                "同步用户信息" + DateTime.Now.ToString("yyyy-MM-dd"));

            doc = ReadXmlResponse(request.GetResponse());

            LogUtil.WriteLog(null, "JSPSoap接口返回值：" + doc.OuterXml,
                "同步用户信息" + DateTime.Now.ToString("yyyy-MM-dd"));

            return doc;
        }
        private static string GetNamespace(String URL)
        {
            return GetNamespace(URL, true);
        }
        private static string GetNamespace(String URL, bool expect100Continue)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(
                URL.ToLower().Contains("?wsdl") ? URL : URL + "?WSDL");
            request.ServicePoint.Expect100Continue = expect100Continue;
            request.Method = "GET";
            request.ContentType = "application/x-www-form-urlencoded";
            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("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.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 = System.Security.SecurityElement.Escape(sr.ReadToEnd());

            LogUtil.WriteLog(null, "retXml转译前：" + retXml, "同步用户信息" + DateTime.Now.ToString("yyyy-MM-dd"));

            retXml = HTMLDeCode(retXml);
            retXml = HTMLDeCode(retXml);

            LogUtil.WriteLog(null, "retXml转译后：" + retXml, "同步用户信息" + DateTime.Now.ToString("yyyy-MM-dd"));

            sr.Close();
            XmlDocument doc = new XmlDocument();

            int startIndex = retXml.IndexOf("<ns1:out>") + 9;
            int endIndex = retXml.IndexOf("</ns1:out>");
            retXml = retXml.Substring(startIndex, endIndex - startIndex);
            LogUtil.WriteLog(null, "retXml：" + retXml, "同步用户信息" + DateTime.Now.ToString("yyyy-MM-dd"));
            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);
        }
        //缓存xmlNamespace，避免重复调用GetNamespace
        private static Hashtable _xmlNamespaces = new Hashtable();

        /// <summary>
        /// HTMLs the de code.
        /// </summary>
        /// <param name="sHTML">The HTML.</param>
        /// <returns></returns>
        public static string HTMLDeCode(string sHTML)
        {
            string sTemp = "";
            if (sHTML.Length == 0)
            {
                return "";
            }
            sTemp = sHTML.Replace("&lt;", "<");
            sTemp = sTemp.Replace("&gt;", ">");
            sTemp = sTemp.Replace("&#39;", "'");
            sTemp = sTemp.Replace("&nbsp;", " ");
            sTemp = sTemp.Replace("&quot;", "\"");
            sTemp = sTemp.Replace("&amp;", "&");
            sTemp = sTemp.Replace("<br />", "\n");
            return sTemp;
        }
    }
}