(转)C#自制Web 服务器开发：用C#开发自己的Web服务器

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace WindowsFormsApplication1
{
    class MyWebServer
    {
        private TcpListener myListener;
        private int port = 8899; // 选者任何闲置端口
        //开始兼听端口
        //同时启动一个兼听进程
        public MyWebServer()
        {
            try
            {
                //开始兼听端口
                myListener = new TcpListener(port);
                myListener.Start();
                Console.WriteLine("Web Server Running... Press ^C to Stop...");
                //同时启动一个兼听进程 ''StartListen''
                Thread th = new Thread(new ThreadStart(StartListen));
                th.Start();
            }
            catch (Exception e)
            {
                Console.WriteLine("兼听端口时发生错误 :" + e.ToString());
            }
        }
        public void SendHeader(string sHttpVersion, string sMIMEHeader, int iTotBytes, string sStatusCode, ref Socket mySocket)
        {

            String sBuffer = "";
            if (sMIMEHeader.Length == 0)
            {
                sMIMEHeader = "text/html"; // 默认 text/html
            }
            sBuffer = sBuffer + sHttpVersion + sStatusCode + "
";
            sBuffer = sBuffer + "Server: cx1193719-b
";
            sBuffer = sBuffer + "Content-Type: " + sMIMEHeader + "
";
            sBuffer = sBuffer + "Accept-Ranges: bytes
";
            sBuffer = sBuffer + "Content-Length: " + iTotBytes + "

";
            Byte[] bSendData = Encoding.ASCII.GetBytes(sBuffer);
            SendToBrowser(bSendData, ref mySocket);
            Console.WriteLine("Total Bytes : " + iTotBytes.ToString());
        }
        public void SendToBrowser(String sData, ref Socket mySocket)
        {
            SendToBrowser(Encoding.ASCII.GetBytes(sData), ref mySocket);
        }

        public void SendToBrowser(Byte[] bSendData, ref Socket mySocket)
        {
            int numBytes = 0;

            try
            {
                if (mySocket.Connected)
                {
                    if ((numBytes = mySocket.Send(bSendData, bSendData.Length, 0)) == -1)
                        Console.WriteLine("Socket Error cannot Send Packet");
                    else
                    {
                        Console.WriteLine("No. of bytes send {0}", numBytes);
                    }
                }
                else
                    Console.WriteLine("连接失败....");
            }
            catch (Exception e)
            {
                Console.WriteLine("发生错误 : {0} ", e);

            }
        }
        public void StartListen()
        {

            int iStartPos = 0;
            String sRequest;
            String sDirName;
            String sRequestedFile;
            String sErrorMessage;
            String sLocalDir;
            /////////////////////////////////////注意设定你自己的虚拟目录/////////////////////////////////////
            String sMyWebServerRoot = "C:\Cassini"; //设置你的虚拟目录
            //////////////////////////
            String sFormattedMessage = "";
            String sResponse = "";


            while (true)
            {
                //接受新连接
                Socket mySocket = myListener.AcceptSocket();

                Console.WriteLine("Socket Type " + mySocket.SocketType);
                if (mySocket.Connected)
                {
                    Console.WriteLine("
Client Connected!!
==================
CLient IP {0}
", mySocket.RemoteEndPoint);

                    Byte[] bReceive = new Byte[1024];
                    int i = mySocket.Receive(bReceive, bReceive.Length, 0);


                    //转换成字符串类型
                    string sBuffer = Encoding.ASCII.GetString(bReceive);


                    //只处理"get"请求类型
                    if (sBuffer.Substring(0, 3) != "GET")
                    {
                        Console.WriteLine("只处理get请求类型..");
                        mySocket.Close();
                        return;
                    }

                    // 查找 "HTTP" 的位置
                    iStartPos = sBuffer.IndexOf("HTTP", 1);


                    string sHttpVersion = sBuffer.Substring(iStartPos, 8);


                    // 得到请求类型和文件目录文件名
                    sRequest = sBuffer.Substring(0, iStartPos - 1);

                    sRequest.Replace("", "/");


                    //如果结尾不是文件名也不是以"/"结尾则加"/"
                    if ((sRequest.IndexOf(".") < 1) && (!sRequest.EndsWith("/")))
                    {
                        sRequest = sRequest + "/";
                    }


                    //得带请求文件名
                    iStartPos = sRequest.LastIndexOf("