C#建立自己的Web服務器

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webserver.cs

namespace cnnbsun.webserver

{

using System;

using System.IO;

using System.Net;

using System.Net.Sockets;

using System.Text;

using System.Threading ;

class MyWebServer

{

private TcpListener myListener ;

private int port = 8080 ; // 選者任何閑置端口

//開始兼聽端口

//同時啟動一個兼聽進程

public MyWebServer()

{

try

{

//開始兼聽端口

myListener = new TcpListener(port) ;

myListener.Start();

Console.WriteLine("Web Server Running... Press ^C to Stop...");

//同時啟動一個兼聽進程 'StartListen'

Thread th = new Thread(new ThreadStart(StartListen));

th.Start() ;

}

catch(Exception e)

{

Console.WriteLine("兼聽端口時發生錯誤 :" +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"; // 默認 text/HTML

}

sBuffer = sBuffer + sHttpVersion + sStatusCode + "\r\n";

sBuffer = sBuffer + "Server: cx1193719-b\r\n";

sBuffer = sBuffer + "Content-Type: " + sMIMEHeader + "\r\n";

sBuffer = sBuffer + "Accept-Ranges: bytes\r\n";

sBuffer = sBuffer + "Content-Length: " + iTotBytes + "\r\n\r\n";

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("連接失敗....");

}

catch (Exception e)

{

Console.WriteLine("發生錯誤 : {0} ", e );

}

}

public static void Main()

{

MyWebServer MWS = new MyWebServer();

}

public void StartListen()

{

int iStartPos = 0;

String sRequest;

String sDirName;

String sRequestedFile;

String sErrorMessage;

String sLocalDir;

/注意設定你自己的虛擬目錄/

String sMyWebServerRoot = "E:\\MyWebServerRoot\\"; //設置你的虛擬目錄

//

String sPhysicalFilePath = "";

String sFormattedMessage = "";

String sResponse = "";

while(true)

{

//接受新連接

Socket mySocket = myListener.AcceptSocket() ;

Console.WriteLine ("Socket Type " +mySocket.SocketType );

if(mySocket.Connected)

{

Console.WriteLine("\nClient Connected!!\n==================\nCLient IP {0}\n",mySocket.RemoteEndPoint) ;

Byte[] bReceive = new Byte[1024] ;

int i = mySocket.Receive(bReceive,bReceive.Length,0) ;

//轉換成字符串類型

string sBuffer = Encoding.ASCII.GetString(bReceive);

//只處理"get"請求類型

if (sBuffer.Substring(0,3) != "GET" )

{

Console.WriteLine("只處理get請求類型..");

mySocket.Close();

return;

}

// 查找 "HTTP" 的位置

iStartPos = sBuffer.IndexOf("HTTP",1);

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

// 得到請求類型和文件目錄文件名

sRequest = sBuffer.Substring(0,iStartPos - 1);

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

//如果結尾不是文件名也不是以"/"結尾則加"/"

if ((sRequest.IndexOf(".") <1) && (!sRequest.EndsWith("/")))

{

sRequest = sRequest + "/";

}

//得帶請求文件名

iStartPos = sRequest.LastIndexOf("/") + 1;

sRequestedFile = sRequest.Substring(iStartPos);

//得到請求文件目錄

sDirName = sRequest.Substring(sRequest.IndexOf("/"), sRequest.LastIndexOf("/")-3);

//獲取虛擬目錄物理路徑

sLocalDir = sMyWebServerRoot;

Console.WriteLine("請求文件目錄 : " + sLocalDir);

if (sLocalDir.Length == 0 )

{

sErrorMessage = "

Error!! Requested Directory does not exists

";

SendHeader(sHttpVersion, "", sErrorMessage.Length, " 404 Not Found", ref mySocket);

SendToBrowser(sErrorMessage, ref mySocket);

mySocket.Close();

continue;

}

if (sRequestedFile.Length == 0 )

{

// 取得請求文件名

sRequestedFile = "index.HTML";

}

/

// 取得請求文件類型(設定為text/HTML)

/

String sMimeType = "text/HTML";

sPhysicalFilePath = sLocalDir + sRequestedFile;

Console.WriteLine("請求文件: " + sPhysicalFilePath);

if (File.Exists(sPhysicalFilePath) == false)

{

sErrorMessage = "

404 Error! File Does Not Exists...

";

SendHeader(sHttpVersion, "", sErrorMessage.Length, " 404 Not Found", ref mySocket);

SendToBrowser( sErrorMessage, ref mySocket);

Console.WriteLine(sFormattedMessage);

}

else

{

int iTotBytes=0;

sResponse ="";

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

BinaryReader reader = new BinaryReader(fs);

byte[] bytes = new byte[fs.Length];

int read;

while((read = reader.Read(bytes, 0, bytes.Length)) != 0)

{

sResponse = sResponse + Encoding.ASCII.GetString(bytes,0,read);

iTotBytes = iTotBytes + read;

}

reader.Close();

fs.Close();

SendHeader(sHttpVersion, sMimeType, iTotBytes, " 200 OK", ref mySocket);

SendToBrowser(bytes, ref mySocket);

//mySocket.Send(bytes, bytes.Length,0);

}

mySocket.Close();

}

}

}

}

}

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