C#建立最简单的web服务，无需IIS

软件架构师何志丹
 本程序只是入门级程序，所以不考虑

 1，多线程。

 2，安全性。

 3，不考虑端点下载文件。

 4，Keep-Alive。

 5，不考虑head。

 6,为了简洁，删掉了catch的内容。


 exe的祖父目录必须有wwwroot文件夹，且文件夹有index.htm，内容不限。　

 开发环境： WinXP+VS2010C#


 一，新建一个项目TestWeb，项目类型：Windows窗口应用程序。

 二，新建类RequestProcessor。

  using System;

 using System.IO;

 using System.Net;

 using System.Net.Sockets;

 using System.Text;

 using System.Threading;

 using System.Diagnostics;


 namespace TestWeb

 {

     class RequestProcessor

     {

         public bool ParseRequestAndProcess(string[] RequestLines)//解析内容

         {

             for (int i = 0; i < RequestLines.Length; i++)

                 System.Diagnostics.Trace.Write(RequestLines[i]);


             char[] sp = new Char[1] { ' ' };

             string[] strs = RequestLines[0].Split(sp);

             if (strs[0] == "GET")

             {

                 Send(strs[1], 0, 0);

             }


             return false;

         }


         void Send(string filename, long start, long length)//发送文件（文件头和文件）

         {

             string strFileName = GetPathFileName(filename);

             FileStream fs = null;

             try

             {

                 fs = new FileStream(strFileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);


             }

             catch (IOException)// FileNotFoundException)

             {//不能将 e.Message,发给浏览器，否则会有安全隐患的

                 SendHeadrAndStr("打开文件" + filename + "失败。");

                 return;

             }


             if (length == 0)

                 length = fs.Length - start;


             SendHeader("text/html", (fs.Length == length), start, length);

             sendContent(fs, start, length);

         }


         public void SendHeadrAndStr(String str)//直接将str的内容发给html

         {

             byte[] sendchars = Encoding.Default.GetBytes((str).ToCharArray());

             SendHeader("text/html", true, 0, sendchars.Length);

             SendStr(Encoding.Default, str);

         }


         private void SendHeader(string fileType, bool bAll, long start, long length)//发送文件头

         {

             try

             {

                 Encoding coding = Encoding.Default;

                 string strSend;

                 string strState = (bAll) ? "HTTP/1.1 200 OK" : "HTTP/1.1 206 Partial Content";

                 SendStr(coding, strState + "\r\n");

                 SendStr(coding, "Date: \r\n");

                 SendStr(coding, "Server: httpsrv/1.0\r\n");

                 SendStr(coding, "MIME-Version: 1.0\r\n");

                 SendStr(coding, "Content-Type: " + fileType + "\r\n");



                 strSend = "Content-Length: " + length.ToString();

                 SendStr(coding, strSend + "\r\n");


                 //发送一个空行

                 SendStr(coding, "\r\n");

             }

             catch (ArgumentException)//the request is WRONG

             {



             }


         }


         private void sendContent(FileStream fs, long start, long length)//发生文件内容

         {

             try

             {


                 //报文头发送完毕，开始发送正文

                 const int SOCKETWINDOWSIZE = 8192;

                 long r = SOCKETWINDOWSIZE;

                 int rd = 0;

                 Byte[] senddatas = new Byte[SOCKETWINDOWSIZE];

                 fs.Seek(start, SeekOrigin.Begin);

                 do

                 {

                     r = start + length - fs.Position;

                     //fs.BeginRead(s,s,s,s,d) 以后使用的版本，用以提高读取的效率                

                     if (r >= SOCKETWINDOWSIZE)

                         rd = fs.Read(senddatas, 0, SOCKETWINDOWSIZE);

                     else

                         rd = fs.Read(senddatas, 0, (int)r);

                     mSockSendData.Send(senddatas, 0, rd, SocketFlags.None);

                 } while (fs.Position != start + length);


             }

             catch (SocketException e)

             {

                 throw e;

             }

             catch (IOException e)

             {

                 throw e;

             }

         }




         public Socket mSockSendData;//Notice: get from ClientSocketThread.s






         private string GetPathFileName(string filename)

         {

             const string strDefaultPage = "index.htm";

             const string strWWWRoot = "..\\..\\wwwroot\\";

             string strFileName = String.Copy(filename);

             if ("/" == strFileName)

                 strFileName = strDefaultPage;

             return System.AppDomain.CurrentDomain.BaseDirectory + strWWWRoot + strFileName;

         }


         private void SendStr(Encoding coding, string strSend)//发送一个字符串

         {

             Byte[] sendchars = new Byte[512];

             sendchars = coding.GetBytes((strSend).ToCharArray());

             mSockSendData.Send(sendchars, 0, sendchars.Length, SocketFlags.None);

         }

     }

 }


 三，新建类ClientSocketThread。

 using System;

 using System.Net;

 using System.Net.Sockets;

 using System.Text;

 using System.Threading;


 namespace TestWeb

 {

     class ClientSocketThread

     {

         public TcpListener tcpl;//Notice: get from SrvMain.tcpl

         private static Encoding ASCII = Encoding.ASCII;


         public void HandleThread()

         {

             Thread currentThread = Thread.CurrentThread;

             try

             {


                 Socket s = tcpl.AcceptSocket();



                 RequestProcessor aRequestProcessor = new RequestProcessor(); //Notice:

                 aRequestProcessor.mSockSendData = s;//Notice: so that the processor can work



                 const int BUFFERSIZE = 4096;//that's enough???

                 Byte[] readclientchar = new Byte[BUFFERSIZE];

                 char[] sps = new Char[2] { '\r', '\n' };

                 string[] RequestLines = new string[32];


                 do

                 {

                     //use BUFFERSIZE contral the receive data size to avoid the BufferOverflow attack

                     int rc = s.Receive(readclientchar, 0, BUFFERSIZE, SocketFlags.None);


                     string strReceive = ASCII.GetString(readclientchar, 0, rc);


                     RequestLines = strReceive.Split(sps);



                 } while (aRequestProcessor.ParseRequestAndProcess(RequestLines));


                 s.Close();

             }

             catch (SocketException)

             {


             }

         }



     }

 } 



 四，主对话框中增加按钮，按键的相应函数加如下代码。

 using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Linq;

 using System.Text;

 using System.Windows.Forms;


 using System.IO;

 using System.Net;

 using System.Net.Sockets;

 using System.Threading;


 namespace TestWeb

 {

     public partial class Form1 : Form

     {

         public Form1()

         {

             InitializeComponent();

         }


         private void button1_Click(object sender, EventArgs e)

         {

               try

             {

                 //启动监听程序                

                 TcpListener tcpl;

                 IPAddress LocalIP = Dns.Resolve("localhost").AddressList[0];

                 tcpl = new TcpListener(LocalIP, 80); // listen on port 80

                 tcpl.Start();

                          


                // int ThreadID = 0;

                 while (true)

                 {

                     while (!tcpl.Pending())

                     {

                         Thread.Sleep(100);

                     }


                     //启动接受线程

                     ClientSocketThread myThreadHandler = new ClientSocketThread();

                     myThreadHandler.tcpl = tcpl;//Notice: dont forget do this

                     ThreadStart myThreadStart = new ThreadStart(myThreadHandler.HandleThread);

                     Thread myWorkerThread = new Thread(myThreadStart);      

                     myWorkerThread.Start();

                 }

             }

             catch (SocketException )

             {

            

             }

             catch (FormatException)

             {

                

             }

             catch (Exception )

             {

                

             }

             //  Console.Read();

        

         }

     }

 }


五，启动TestWeb.exe，并单击主对话框上的按钮。在浏览器中输入：http://127.0.0.1/ 或http://127.0.0.1:80。