CF.NET 2.0 通过cmwap访问外部webService

这个帖子本16号放在首页，不知道为何不见了，也许是我误删除了吧，重新补上，放在我自己的首页。

最近在做手机上一程序，需要通过移动cmwap访问外部的webservice,但使用wsdl生成的代理类通过cmwap网关访问会出现"Client found response content type of 'text/vnd.wap.wml',but expected 'text/xml' ".的异常信息，换用cmnet网络则正常。
应该是通过cmwap网关请求返回的数据被转化为wml类型了，wsdl代理类只认xml；
把google翻了也找不到解决方案，只好自己用最笨的办法，用HttpWebRequest和HttpWebResponse实现访问soap协议。

代码如下：

SoapClient
/**//*
code by Aijoe(原 Ivan Chin) 
http://www.lostway.net/
http://www.cnblogs.com/drw/
aijoe@lostway.net
转载请保留此信息。
*/

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Threading;
using System.Xml;

namespace IvanCF.Soap
{
    internal class SoapClient 
    {
        属性#region 属性

        private string nameSpace = "http://tempurl.org/";
        private Uri serviceUrl;
        private IWebProxy webProxy = null;
        private ICredentials credentials = null;
        private int timeOut = 30000;
        private Encoding encoding = Encoding.GetEncoding("UTF-8");

        //设置请求的webservice命名空间
        public string Namespace
        {
            get { return nameSpace; }
            set { nameSpace = value; }
        }

        //webservice地址
        public Uri ServiceUrl
        {
            get { return serviceUrl; }
            set { serviceUrl = value; }
        }

        //客户端使用代理
        public IWebProxy Proxy
        {
            get { return webProxy; }
            set { webProxy = value; }
        }

        //客户端验证
        public ICredentials Credentials
        {
            get { return credentials; }
            set { credentials = value; }
        }

        //webservice请求编码格式
        public Encoding ContentEncoding
        {
            get { return encoding; }
            set { encoding = value; }
        }

        //超时时间
        public int TimeOut
        {
            get { return timeOut; }
            set { timeOut = value; }
        }

        #endregion
        
        private const int BUFFER_SIZE = 512;

        异步方法#region 异步方法

        //用于操作等待线程。
        public static ManualResetEvent allDone = new ManualResetEvent(false);

        实现事件完成通知#region 实现事件完成通知

        //异步调用完成的事件
        public event SoapInvokeCompletedEventHandler SoapInvokeCompleted;
        protected virtual void OnSoapInvokeCompleted(SoapInvokeCompleteArgs args)
        {
            if (SoapInvokeCompleted != null)
                SoapInvokeCompleted(this, args);
        }

        #endregion

        /**//// <summary>
        /// 异步调用webService的方法
        /// </summary>
        /// <param name="methodName">调用的webService的方法名称</param>
        /// <param name="parameters">发送的数据</param>
        public void InvokeAsync(string methodName, PostDataArray parameters)
        {
            RequestState state = new RequestState();
            state.MethodName = methodName;
            state.Parameters = parameters;
            try
            {
                state.Request = (HttpWebRequest) WebRequest.Create(ServiceUrl);
                if (TimeOut > 0) state.Request.Timeout = TimeOut;
                if (Proxy != null) state.Request.Proxy = Proxy;
                if (Credentials != null) state.Request.Credentials = Credentials;
                state.DataSend.Append(ResloveSendData(methodName, parameters));
                state.Request.ContentLength = ContentEncoding.GetByteCount(state.DataSend.ToString());
                state.Request.Method = "POST";
                state.Request.ContentType = "application/soap+xml; charset=" + ContentEncoding.WebName.ToLower();

                //开始获取请求流
                state.Request.BeginGetRequestStream(new AsyncCallback(ReqCall), state);

                //阻塞当前进程，直到收到完成的通知。
                allDone.WaitOne();
            }
            catch (Exception ex)
            {
                state.Error = ex;
                allDone.Set();
            }
            finally
            {
                allDone.Reset();
            }

            string rData = null;
            if (state.Error == null)
            {
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(state.DataRecived.ToString());
                rData = ResloveRecivedData(methodName, doc);
            }
            string sData = state.DataSend.ToString();
            SoapInvokeCompleteArgs args = new SoapInvokeCompleteArgs(methodName,
                                                                     sData,
                                                                     rData,
                                                                     state.Error);
            //访问完成通知Soap完成事件。
            OnSoapInvokeCompleted(args);
            state.Close();
            GC.WaitForPendingFinalizers();
            GC.Collect();
        }

        private void ReqCall(IAsyncResult ar)
        {
            RequestState state = (RequestState) ar.AsyncState;
            try
            {
                //写入请求
                StreamWriter streamWriter = new StreamWriter(state.Request.EndGetRequestStream(ar));
                streamWriter.Write(state.DataSend.ToString());
                streamWriter.Flush();
                streamWriter.Close();

                //开始取得响应。
                state.Request.BeginGetResponse(new AsyncCallback(ResCall), state);
            }
            catch (Exception ex)
            {
                state.Error = ex;
                allDone.Set();
            }
        }

        private void ResCall(IAsyncResult ar)
        {
            RequestState state = (RequestState) ar.AsyncState;
            try
            {
                //取响应完毕。
                state.Response = (HttpWebResponse) state.Request.EndGetResponse(ar);
                state.ResponseStream = state.Response.GetResponseStream();
                //开始读取流。
                state.ResponseStream.BeginRead(state.BufferRead, 0, BUFFER_SIZE,
                                               new AsyncCallback(ReadCall), state);
            }
            catch (Exception ex)
            {
                state.Error = ex;
                allDone.Set();
            }
        }

        private void ReadCall(IAsyncResult ar)
        {
            RequestState state = (RequestState) ar.AsyncState;
            try
            {
                //分段读取流。
                int read = state.ResponseStream.EndRead(ar);
                if (read > 0)
                {
                    string strRes = ContentEncoding.GetString(state.BufferRead, 0, read);
                    state.DataRecived.Append(strRes);
                    state.ResponseStream.BeginRead(state.BufferRead, 0, BUFFER_SIZE,
                                                   new AsyncCallback(ReadCall), state);
                }
                else
                {
                    allDone.Set();
                }
            }
            catch (Exception ex)
            {
                state.Error = ex;
                allDone.Set();
            }
        }

        #endregion

        同步方法#region 同步方法 

        /**//// <summary>
        /// 同步调用webService的方法
        /// </summary>
        /// <param name="methodName">方法名称</param>
        /// <param name="data">发送的xml数据</param>
        /// <returns>返回的xml数据</returns>
        public InvokeResult Invoke(string methodName, PostDataArray data)
        {
            InvokeResult result = new InvokeResult();
            result.MethodName = methodName;
            HttpWebRequest request = (HttpWebRequest) WebRequest.Create(ServiceUrl);

            if (TimeOut > 0) request.Timeout = TimeOut;
            if (Proxy != null) request.Proxy = Proxy;
            if (Credentials != null) request.Credentials = Credentials;

            result.DataSend = ResloveSendData(methodName, data);
            request.ContentLength = ContentEncoding.GetByteCount(result.DataSend);
            request.Method = "POST";
            request.ContentType = "application/soap+xml; charset=" + ContentEncoding.WebName.ToLower();

            StreamWriter streamWriter = new StreamWriter(request.GetRequestStream());
            streamWriter.Write(result.DataSend);
            streamWriter.Flush();
            streamWriter.Close();

            HttpWebResponse response = null;
            Stream responseStream = null;
            try
            {
                response = (HttpWebResponse) request.GetResponse();
                responseStream = response.GetResponseStream();
                XmlDocument doc = new XmlDocument();
                doc.Load(responseStream);
                result.DataRecived = ResloveRecivedData(methodName, doc);
            }
            catch (Exception ex)
            {
                result.Error = ex;
                //AppNet.GetLog().wLog(ex.ToString(), "Exception at " + invokeMethod + " Invoke");
            }
            finally
            {
                if (response != null) response.Close();
                if (responseStream != null) responseStream.Close();
                GC.WaitForPendingFinalizers();
                GC.Collect();
            }
            return result;
        }

        #endregion

        helper Method#region helper Method 

        //将发送的数据从PostDataArray转化成soap1.2的xml数据格式。
        private string ResloveSendData(string invokeMethod, PostDataArray data)
        {
            string soapNs = "http://www.w3.org/2003/05/soap-envelope";
            string strSoapData;
            using (MemoryStream stream = new MemoryStream())
            {
                using (XmlTextWriter writer = new XmlTextWriter(stream, ContentEncoding))
                {
                    writer.WriteStartDocument();
                    writer.WriteStartElement("soap12", "Envelope", soapNs);
                    writer.WriteStartElement("soap12", "Body", soapNs);
                    writer.WriteStartElement(invokeMethod, Namespace);
                    AddData2XmlWriter(writer, data);
                    writer.WriteEndElement();
                    writer.WriteEndElement();
                    writer.WriteEndElement();
                    writer.Flush();
                    stream.Seek(0, SeekOrigin.Begin);
                    using (StreamReader reader = new StreamReader(stream))
                    {
                        strSoapData = reader.ReadToEnd();
                    }
                }
            }
            return strSoapData;
        }

        //我对返回的xml数据进行了简单的处理，仅留下了<方法名Result></方法名Result>这一节，以便后续处理。
        private string ResloveRecivedData(string invokeMethod, XmlDocument doc)
        {
            bool IsSoap12 = false;
            if (doc.OuterXml.IndexOf("soap12:Envelope") != -1) IsSoap12 = true;
            XmlNamespaceManager nsmanager = new XmlNamespaceManager(doc.NameTable);
            if (IsSoap12)
                nsmanager.AddNamespace("soap12", "http://www.w3.org/2003/05/soap-envelope");
            else
                nsmanager.AddNamespace("soap", "http://www.w3.org/2003/05/soap-envelope");
            string xpath = "//soap:Envelope/soap:Body";
            if (IsSoap12) xpath = "//soap12:Envelope/soap12:Body";
            XmlNode node = doc.SelectSingleNode(xpath, nsmanager);
            string strDoc = node.InnerXml;
            strDoc =
                strDoc.Replace("<" + invokeMethod + "Response xmlns=\"" + Namespace + "\"",
                               "<" + invokeMethod + "Response");
            doc = new XmlDocument();
            doc.LoadXml(strDoc);
            XmlNode rNode = doc.SelectSingleNode(invokeMethod + "Response");
            strDoc = rNode.InnerXml;
            return strDoc;
        }

        //添加PostDataArray到XmlWriter（这个方法为ResloveSendData服务）
        private void AddData2XmlWriter(XmlWriter writer, PostDataArray datas)
        {
            if (datas.ColName.Length > 0) writer.WriteStartElement(datas.ColName);
            foreach (PostData d in datas)
            {
                writer.WriteStartElement(d.Key);
                if (d.Value.GetType() == typeof (byte[]))
                {
                    byte[] bt = (byte[]) d.Value;
                    writer.WriteBase64(bt, 0, bt.Length);
                }
                else
                    writer.WriteValue(d.Value);
                writer.WriteEndElement();
            }

            if (datas.ColName.Length > 0) writer.WriteEndElement();

            if (datas.Childs.Count > 0)
                foreach (PostDataArray col in datas.Childs)
                    AddData2XmlWriter(writer, col);
        }

        #endregion
    }

    这里是几个辅助类，自己去看看吧#region 这里是几个辅助类，自己去看看吧

    //存储同步调用后的结果
    internal struct InvokeResult
    {
        public Exception Error;
        public string DataRecived;
        public string DataSend;
        public string MethodName;
    }

    internal struct PostData
    {
        public PostData(string key, object value)
        {
            Key = key;
            Value = value;
        }

        public string Key;
        public object Value;
    }

    internal class PostDataArray : CollectionBase
    {
        public PostDataArray()
        {
            dataCols = new List<PostDataArray>();
        }

        private List<PostDataArray> dataCols;
        private string colN = "";

        public string ColName
        {
            get { return colN; }
            set { colN = value; }
        }

        public PostData this[int index]
        {
            get { return (PostData) List[index]; }
        }

        public List<PostDataArray> Childs
        {
            get { return dataCols; }
        }

        public void Add(PostData obj)
        {
            List.Add(obj);
        }

        public void Add(string key, object value)
        {
            List.Add(new PostData(key, value));
        }

        public void Add(PostDataArray obj)
        {
            dataCols.Add(obj);
        }

        public new void Clear()
        {
            base.Clear();
            dataCols.Clear();
        }
    }

    internal class RequestState
    {
        public const int BUFFER_SIZE = 512;
        public byte[] BufferRead;
        public HttpWebRequest Request;
        public HttpWebResponse Response;
        public Stream ResponseStream;
        public Stream RequestStream;
        public string MethodName;
        public PostDataArray Parameters;
        public StringBuilder DataSend;
        public StringBuilder DataRecived;
        public Exception Error;

        public RequestState()
        {
            BufferRead = new byte[BUFFER_SIZE];
            DataRecived = new StringBuilder();
            DataSend = new StringBuilder();
            Request = null;
            ResponseStream = null;
            RequestStream = null;
        }

        public void Close()
        {
            if (ResponseStream != null) ResponseStream.Close();
            if (Response != null) Response.Close();
            if (Request != null) Request.Abort();
            Response = null;
            Request = null;
            ResponseStream = null;
            RequestStream = null;
            DataRecived = null;
            DataSend = null;
            MethodName = null;
            Parameters = null;
        }
    }

    #endregion

    //储存事件通知结果
    internal struct SoapInvokeCompleteArgs
    {
        public SoapInvokeCompleteArgs(Exception ex)
        {
            MethodName = null;
            Error = ex;
            DataSend = null;
            DataRecived = null;
            IsCompleted = true;
        }

        public SoapInvokeCompleteArgs(string data, string methodname)
        {
            MethodName = methodname;
            Error = null;
            DataSend = null;
            DataRecived = data;
            IsCompleted = true;
        }

        public SoapInvokeCompleteArgs(string methodname, string sendData, string recivedData, Exception error)
        {
            MethodName = methodname;
            DataSend = sendData;
            DataRecived = recivedData;
            Error = error;
            IsCompleted = true;
        }

        //调用的方法名称
        public string MethodName;
        //返回的xml数据
        public string DataRecived;
        //发送给weService的xml数据
        public string DataSend;
        //调用过程的错误信息
        public Exception Error;
        //是否已完成
        public bool IsCompleted;
    }

    //委托完成事件
    internal delegate void SoapInvokeCompletedEventHandler(object sender, SoapInvokeCompleteArgs e);

}

代码说明：
代码原理比较简单，主要是了解Soap1.2的格式和xml操作。
已经在代码中加入了部分注释。下面是一个调用例子

void getwebservice(){PostDataArray data = new PostDataArray();data.Add("参数1", "参数值1");PostDataArray indata = new PostDataArray();indata.Add("嵌套参数1","嵌套参数值1");indata.ColName = "嵌套节点名称";data.Add(indata);SoapClient soap = new SoapClient();soap.ContentEncoding = Encoding.GetEncoding(65001);soap.Proxy = new WebProxy("代理");soap.ServiceUrl = new Uri("webService地址");soap.TimeOut = 180000;//超时时间(毫秒)//用同步方法调用ws，直接返回InvokeResult结果;soap.Invoke("webService方法名称", data);//用异步方法调用ws，在SoapInvokeCompleted事件中处理结果。soap.SoapInvokeCompleted += new SoapInvokeCompletedEventHandler(soap_SoapInvokeCompleted);soap.InvokeAsync("webService方法名称", data);
}