using System;using System.IO;using System.Net;using System.Text;using System.Web;using System.Collections.Generic;using System.CodeDom.Compiler;using System.Web.Services.Description;using System.CodeDom;using Microsoft.CSharp;/********************** 描述：提供http、POST和GET、Webservices动态访问远程接口 * *******************/namespace Demo{    public static class HttpHelper    {        ///          /// 有关HTTP请求的辅助类        ///         private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";//浏览器         private static Encoding requestEncoding = System.Text.Encoding.UTF8;//字符集   #region 创建GET方式的HTTP请求        ///        /// 创建GET方式的HTTP请求           ///        /// 接口URL        /// 接口URL的参数        /// 调用接口返回的信息        ///        public static bool HttpGet(string url, Dictionary dctParam, out string HttpWebResponseString)        {            if (string.IsNullOrEmpty(url))            {                throw new ArgumentNullException("url");            }            HttpWebResponseString = "";             HttpWebRequest request = null;            Stream stream = null;//用于传参数的流             HttpWebResponse httpWebResponse = null;  try            {                int i = 0;                StringBuilder buffer = new StringBuilder();                if (!(dctParam == null))                {                    foreach (string key in dctParam.Keys)                    {                        if (i > 0)                        {                            buffer.AppendFormat("&{0}={1}", key, (dctParam[key]));                        }                        else                        {                            buffer.AppendFormat("{0}={1}", key, (dctParam[key]));                        }                        i++;                    }                    url = url + "?" + buffer.ToString();                }                request = WebRequest.Create(url) as HttpWebRequest;                request.Method = "GET";//传输方式                  request.ContentType = "application/x-www-form-urlencoded";//协议                request.UserAgent = DefaultUserAgent;//请求的客户端浏览器信息,默认IE                 request.Timeout = 6000;//超时时间，写死6秒                request.KeepAlive = false;                //DefaultConnectionLimit是默认的2，而当前的Http的connection用完了，导致后续的GetResponse或GetRequestStream超时死掉                System.Net.ServicePointManager.DefaultConnectionLimit = 50;                request.ServicePoint.Expect100Continue = false;                httpWebResponse = request.GetResponse() as HttpWebResponse;                HttpWebResponseString = ReadHttpWebResponse(httpWebResponse);                return true;            }            catch (Exception ee)            {                HttpWebResponseString = ee.ToString();                return false;            }  finally            {                if (stream != null)                {                    stream.Close();                }                if (request != null)                {
                    request.Abort();                    request = null;                }                if (httpWebResponse != null)                {                    httpWebResponse.Close();                    httpWebResponse = null;                }            }        }              #endregion   #region 创建POST方式的HTTP请求        ///        /// 创建POST方式的HTTP请求           ///        /// 接口URL        /// 接口URL的参数        /// 调用接口返回的信息        ///        public static bool HttpPost(string url, Dictionary dctParam, out string HttpWebResponseString)        {            if (string.IsNullOrEmpty(url))            {                throw new ArgumentNullException("url");            }            HttpWebResponseString = "";            HttpWebRequest request = null;            Stream stream = null;//用于传参数的流 try            {                url = EncodePostData(url);                request = WebRequest.Create(url) as HttpWebRequest;                request.Method = "POST";//传输方式                 request.ContentType = "application/x-www-form-urlencoded";//协议                request.UserAgent = DefaultUserAgent;//请求的客户端浏览器信息,默认IE                  request.Timeout = 6000;//超时时间，写死6秒                //DefaultConnectionLimit是默认的2，而当前的Http的connection用完了，导致后续的GetResponse或GetRequestStream超时死掉                System.Net.ServicePointManager.DefaultConnectionLimit = 50;                request.ServicePoint.Expect100Continue = false;                //如果需求POST传数据，转换成utf-8编码                byte[] Data = http://www.mamicode.com/ParamDataConvert(dctParam);"Demo";//本页的命名空间            try            {                //获取WSDL                WebClient wc = new WebClient();                Stream stream = wc.OpenRead(url);                ServiceDescription sd = ServiceDescription.Read(stream);                ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();                sdi.AddServiceDescription(sd, "", "");                CodeNamespace cn = new CodeNamespace(@namespace);                //生成客户端代理类代码                CodeCompileUnit ccu = new CodeCompileUnit();                ccu.Namespaces.Add(cn);                sdi.Import(cn, ccu);                CSharpCodeProvider csc = new CSharpCodeProvider();                CSharpCodeProvider icc = new CSharpCodeProvider();                //设定编译参数                CompilerParameters cplist = new CompilerParameters();                cplist.GenerateExecutable = false;                cplist.GenerateInMemory = true;                cplist.ReferencedAssemblies.Add("System.dll");                cplist.ReferencedAssemblies.Add("System.XML.dll");                cplist.ReferencedAssemblies.Add("System.Web.Services.dll");                cplist.ReferencedAssemblies.Add("System.Data.dll");//编译代理类                CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);                if (true == cr.Errors.HasErrors)                {                    System.Text.StringBuilder sb = new System.Text.StringBuilder();                    foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)                    {                        sb.Append(ce.ToString());                        sb.Append(System.Environment.NewLine);                    }                    throw new Exception(sb.ToString());                }                //生成代理实例，并调用方法                System.Reflection.Assembly assembly = cr.CompiledAssembly;                Type[] types = assembly.GetTypes();                Type t = types[0];                object obj = Activator.CreateInstance(t);                System.Reflection.MethodInfo mi = t.GetMethod(methodname);                return mi.Invoke(obj, args);            }            catch (Exception ex)            {              }            return null;        }        #endregion    ///        /// 接口参数转换        ///        /// 接口参数集合包        ///        private static byte[] ParamDataConvert(Dictionary dctParam)        {            if (dctParam == null) return null;            try            {                Encoding requestEncoding = System.Text.Encoding.UTF8;//字符集                StringBuilder buffer = new StringBuilder();                int i = 0;                foreach (string key in dctParam.Keys)                {                    if (i > 0)                    {                        buffer.AppendFormat("&{0}={1}", key, (dctParam[key]));                    }                    else                    {                        buffer.AppendFormat("{0}={1}", key, (dctParam[key]));                    }                    i++;                }                string PostData = http://www.mamicode.com/buffer.ToString();"utf-8"字符集)                 sReader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));                // 开始读取数据                 value = http://www.mamicode.com/sReader.ReadToEnd();>