HttpWebRequest 发送请求及开启监听

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Threading;
using System.IO;
using System.Security.Cryptography;
using System.Collections.Specialized;
using System.Text;
using System.Web;

namespace HttpListenerTest
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main ()
        {
            Application.EnableVisualStyles ();
            Application.SetCompatibleTextRenderingDefault (false);
            string sendMsg = "hello word";

           sendToRetUrl ("http://127.0.0.1:12345/aa.aspx?",sendMsg);

            start ();
         }
        private static Thread threads = null;
        private static System.Net.HttpListener listener = null;
        public static void start ()
        {
            try
            {
                //开启一个处理Socket客户端通信的线程
                threads = new Thread (new ThreadStart (startListener));
                threads.Start ();
            }
            catch (Exception se)
            {
                Console.WriteLine (se.ToString ());
            }
        }

        //开启http监听

        public static void startListener ()
        {
            Console.WriteLine ("-----------------");
            try
            {
               bool flag = true;
                if (listener == null)
                {
                    listener = new System.Net.HttpListener ();
                    listener.Prefixes.Add ("http://127.0.0.1:55555/");//监听所有ip地址为127.0.0.1，端口为55555的地址
                   
                }
                listener.Start ();
                while (flag)
                {
                    try
                    {
                        IAsyncResult result = listener.BeginGetContext (EndGetRequest,listener);
                        result.AsyncWaitHandle.WaitOne ();

                    }
                    catch (Exception e)
                    {
                        break;
                    }
                }
            }
            catch (Exception e1)
            {
                Console.WriteLine ("服务器Http方式监听报错:最终错误:" + e1.Message + "\r\n错误原因:" + e1.StackTrace);
            }
        }

        public static System.Net.HttpListenerContext context = null;
        public static void EndGetRequest (IAsyncResult result)
        {
            Console.WriteLine ("--------返回来了-------");
            byte[] sendData = null;
          
            System.Net.HttpListener listener = null;
            try
            {
                listener = (System.Net.HttpListener)result.AsyncState;

                //          System.Net.HttpListenerContext context = (System.Net.HttpListenerContext)param;
                if (listener != null && listener.IsListening)
                {
                    context = listener.EndGetContext (result);
                   // context.Response.ContentEncoding = System.Text.Encoding.UTF8;
                    string requestOrder = context.Request.Url.AbsolutePath;
                    string paramQuery = context.Request.Url.Query;
                    paramQuery = HttpUtility.UrlDecode (paramQuery,Encoding.UTF8);
                    Console.WriteLine ("requestOrder=" + requestOrder + "------paramQuery=" + paramQuery);
                    if (requestOrder.Contains ("OrderMsg.aspx") && paramQuery.Contains ("&SignMsg="))
                    {
                        string realQuery = paramQuery.Substring (1);
                        Console.WriteLine ("------" + realQuery);
                        string orgParam = realQuery.Substring (0,realQuery.IndexOf ("&SignMsg"));
                        Console.WriteLine ("参数：" + orgParam);
                        string orgMsg = "Airepay2012" + orgParam;
                        string SignMsg = realQuery.Substring (realQuery.IndexOf ("&SignMsg=")+9);
                        Console.WriteLine ("SignMsg===" + SignMsg);
                        //context.Request.QueryString["SignMsg"]
                        if (checkSign (orgMsg,SignMsg))
                        {
                            NameValueCollection paramValue = context.Request.QueryString;
                            Console.WriteLine ("获取到信息为:" + orgParam);
                            //string retMsg = receiveAndSend (paramValue);
                           // sendData = context.Request.ContentEncoding.GetBytes (retMsg);
                            sendData = context.Request.ContentEncoding.GetBytes ("发送数据成功接收");
                        }
                        else
                        {
                            sendData = context.Request.ContentEncoding.GetBytes ("请求验证签名失败");
                            Console.WriteLine ("请求验证签名失败");
                        }
                    }
                    else
                    {
                        Console.WriteLine ("非法请求");
                        sendData = context.Request.ContentEncoding.GetBytes ("非法请求");
                    }
                }
            }
            catch (Exception ex)
            {
                Console.Write ("Exception in listener: {0}{1}",Environment.NewLine,ex);
                if (context != null)
                    sendData = context.Request.ContentEncoding.GetBytes ("系统错误");
            }
            finally
            {
                if (context != null)
                {
                    context.Response.ContentEncoding = System.Text.Encoding.UTF8;
                    context.Response.Close (sendData,true);
                }
                //             if (listener.IsListening)
                //                 listener.BeginGetContext(EndGetRequest, listener);
            }
        }

        //验证签名
        public static bool checkSign (string orgMsg,string signedMsg)
        {
            bool flag = false;
            if (orgMsg != null && signedMsg != null)
            {
                string newSignedMsg = MD5ToString (orgMsg);
                flag = newSignedMsg.Equals (signedMsg.ToLower (),StringComparison.CurrentCulture);
            }
            return flag;
        }
        //MD5加密验证
        private static string MD5ToString (String argString)
        {
            MD5 md5 = new MD5CryptoServiceProvider ();
            byte[] data = System.Text.Encoding.UTF8.GetBytes (argString);
            byte[] result = md5.ComputeHash (data);
            String strReturn = String.Empty;
            for (int i = 0; i < result.Length; i++)
                strReturn += result[i].ToString ("x").PadLeft (2,'0');
            return strReturn;
        }

        //发送请求 url 是发送的地址，sendMsg为发送数据的内容
        public static void sendToRetUrl (string url,string sendMsg)
        {
            //签名串
            MD5 md5 = new MD5CryptoServiceProvider ();
            byte[] data = System.Text.Encoding.UTF8.GetBytes ("cen" + sendMsg);
            byte[] result = md5.ComputeHash (data);
            String strReturn = String.Empty;
            for (int i = 0; i < result.Length; i++)
                strReturn += result[i].ToString ("x").PadLeft (2,'0');
          //  sendMsg = HttpUtility.UrlEncode (sendMsg + "&SignMsg=" + strReturn,Encoding.GetEncoding ("utf-8"));
            url = url + sendMsg + "&SignMsg=" + strReturn;

            Console.WriteLine ("-------"+url);
            System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create (url);
            request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
            request.Method = "GET";
            request.CachePolicy = new System.Net.Cache.RequestCachePolicy (System.Net.Cache.RequestCacheLevel.NoCacheNoStore);
            request.Headers.Add ("Pragma","No-cache");
            request.Accept = "*/*";
            request.KeepAlive = true;
            request.ServicePoint.Expect100Continue = false;
            request.Timeout = 120000;
            request.ContentLength = 0;
            System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse ();
            Stream resStream = response.GetResponseStream ();
            byte[] byteResponse = new byte[response.ContentLength];
            resStream.Read (byteResponse,0,(int)response.ContentLength);
            string strResponse = Encoding.Default.GetString (byteResponse);
            Console.WriteLine ("-------strResponse-----" + strResponse);
            response.Close ();
            resStream.Close ();

 

        }
    }
}