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2008-09-09 15:25:14


  webserver.cs
  
  namespace cnnbsun.webserver
  {
  using System;
  using System.IO;
  using System;
  using System.Sockets;
  using System.Text;
  using System.Threading ;
  
  class MyWebServer
  {
  
  private TcpListener myListener ;
  private int port = 8080 ; // 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 + "\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("连接失败....");
  }
  catch (Exception e)
  {
  Console.WriteLine("发生错误 : {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;
  /////////////////////////////////////注意设定你自己的虚拟目录/////////////////////////////////////
  String sMyWebServerRoot = "E:\\MyWebServerRoot\\"; //设置你的虚拟目录
  //////////////////////////////////////////////////////////////////////////////////////////////////
  String sPhysicalFilePath = "";
  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("\nClient_Connected!!\n========\nCLientIP {0}\n",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("/") + 1;
  sRequestedFile = sRequest.Substring(iStartPos);
  
  //得到请求文件目录
  sDirName = sRequest.Substring(sRequest.IndexOf("/"), sRequest.LastIndexOf("/")-3);
  
  //获取虚拟目录物理路径
  sLocalDir = sMyWebServerRoot;
  
  Console.WriteLine("请求文件目录 : " + 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 )
  {
  // 取得请求文件名
  sRequestedFile = "index.html";
  }
  
  /////////////////////////////////////////////////////////////////////
  // 取得请求文件类型(设定为text/html)
  /////////////////////////////////////////////////////////////////////
  
  String sMimeType = "text/html";
  
  sPhysicalFilePath = sLocalDir + sRequestedFile;
  Console.WriteLine("请求文件: " + 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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