C#的HTTP请求客户端实现。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;

namespace Simulator
{
    class Simulator
    {
        public static string PostDataSSL(string purl, string str)
        {
            return PostData(purl, str, true);
        }

        public static string PostData(string url,string str){
            return PostData(url, str, false);
        }

        public static string PostData(string purl,string str,bool sslAuth)
          {
              //System.Net.WebRequest req = System.Net.WebRequest.Create("your url");


              //req.ContentType = "text/xml";

              //req.Method = "POST";


              //byte[] bytes = System.Text.Encoding.ASCII.GetBytes("Your Data");

              //req.ContentLength = bytes.Length;

              //os = req.GetRequestStream();

              //os.Write(bytes, 0, bytes.Length);



              //System.Net.WebResponse resp = req.GetResponse();

              //if (resp == null) return;

              //System.IO.StreamReader sr = new System.IO.StreamReader(resp.GetResponseStream());


              //str responsecontent = sr.ReadToEnd().Trim();



              //if (isCer)

              //{


              // //需要Https验证

              // System.Security.Cryptography.X509Certificates.X509Certificate cer;

              // //System.Security.Cryptography.X509Certificates.X509Certificate cer = System.Security.Cryptography.X509Certificates.X509Certificate.CreateFromCertFile(pfxPath);

              // if (String.IsNullOrEmpty(pfxPassword)) //是否证书加载是否需要密码

              // cer = new X509Certificate(pfxPath);

              // else

              // cer = new X509Certificate(pfxPath, pfxPassword);

              // webReq.ClientCertificates.Add(cer);


              //}




              try
             {
                 byte[] data = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(str);
                 // 准备请求

                 HttpWebRequest req = (HttpWebRequest)WebRequest.Create(purl);
                 if (sslAuth)
                 {
                     ServicePointManager.ServerCertificateValidationCallback = delegate(object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) { return true; };
                 }
                 //设置超时

                 req.Timeout = 30000;
                 req.Method = "POST";
                 req.ContentType = "text/xml";
                 req.ContentLength = data.Length;
                 Stream stream = req.GetRequestStream();

                 //req.ClientCertificates.Add(xCert);

                 // 发送数据

                 stream.Write(data, 0, data.Length);
                 stream.Close();

                 HttpWebResponse rep = (HttpWebResponse)req.GetResponse();
                 Stream receiveStream = rep.GetResponseStream();
                 Encoding encode = System.Text.Encoding.GetEncoding("UTF-8");
                 // Pipes the stream to a higher level stream reader with the required encoding format.

                 StreamReader readStream = new StreamReader(receiveStream, encode);

                 Char[] read = new Char[256];
                 int count = readStream.Read(read, 0, 256);
                 StringBuilder sb = new StringBuilder("");
                 while (count > 0)
                 {
                     String readstr = new String(read, 0, count);
                     sb.Append(readstr);
                     count = readStream.Read(read, 0, 256);
                 }

                 rep.Close();
                 readStream.Close();

                 return sb.ToString();

             }
             catch (Exception ex)
             {
                 return ex.Message;
                // ForumExceptions.Log(ex);

             }
         }

    }
}

http和https的区分也有。