I have a problem with a new C# DHTML chat server I am making. First I'll
describe the problem and then ill post the code.
When I open 3 new instances of IE and connect the first client to
localhost:9999 the first client status bas only displays:
"opening page http://localhost:9999"
It does not display "1" as expected. But when the 2nd client connects the
1st client displays "2" and the 2nd client displays "opening page......"
Only when the 3rd client connects the 2nd client displays "2" in the status
bar the first client displays "3" in the status bar and the 3rd client
displays "1" in the status bar ( because the server now stoped listening and
the program terminated. )
But when I restart the server and reuse the same 3 clients ( without closing
them and opening new instances of IE ) the first client after connecting
displays "1" in the status bar imediately ( as should be ).
when connecting the 2nd client it imediatly displays "1" in the status bar
and the 1st client dispays "2" in the status bar and when i connect the 3rd
client the first client displays "3", the 2nd "2" and the 3rd "1" in the
status bar.
Why is this behavior. On Netscape the behaviour is somewhat similar.
this is the C# code.
// console application
using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Collections;
using System.IO;
using System.Text;
namespace AtomHTTPresponse
{
class AtomHTTPresponse
{
private const int MAX_CONNECTIONS = 3;
private ArrayList prArrayListHTTPpipes = new ArrayList();
private TcpListener prTcpListener = new TcpListener(
IPAddress.Parse( "127.0.0.1" ), 9999 );
static void Main(string[] args)
{
AtomHTTPresponse lAtomHTTPresponse = new AtomHTTPresponse();
Thread lThreadListener = new Thread( new ThreadStart(
lAtomHTTPresponse.ListenerHandler ) );
lThreadListener.Start();
}
private void ListenerHandler()
{
prTcpListener.Start();
for ( int lCntOuter = 0; lCntOuter < MAX_CONNECTIONS;
lCntOuter++ )
{
//lock ( this )
//{
Thread lThreadListener = new Thread( new
ThreadStart( ConnectionHandler ) );
lThreadListener.Start();
//}
}
}
private void ConnectionHandler()
{
TcpClient lTcpClient =
prTcpListener.AcceptTcpClient();
NetworkStream lNetworkStream = lTcpClient.GetStream();
StreamReader lStreamReader = new StreamReader(
lNetworkStream );
StreamWriter lStreamWriter = new StreamWriter(
lNetworkStream );
HTTPpipe lHTTPpipe = new HTTPpipe( lTcpClient,
lNetworkStream, lStreamReader, lStreamWriter );
prArrayListHTTPpipes.Add( lHTTPpipe );
lHTTPpipe.WriteToCLient( "<script
language=\"javascript\">window.status = 0</script>" );
for ( int lCntInner = 0; lCntInner <
prArrayListHTTPpipes.Count; lCntInner++ )
{
( prArrayListHTTPpipes[ lCntInner ] as HTTPpipe
).WriteToCLient( "<script language=\"javascript\">window.status = parseInt(
window.status ) + 1</script>" );
}
}
}
class HTTPpipe
{
public TcpClient puTcpClient;
public NetworkStream puNetworkStream;
public StreamReader puStreamReader;
public StreamWriter puStreamWriter;
public char[] puArrCharRequest = new char[256];
static string cStrResponse = "<script
language=\"javascript\">window.status = 0</script>";
static string cStrHTTPheader = "HTTP/1.1 200 OK\r\n"
+ "Server: Microsoft-IIS/5.0\r\n"
+ "Date: Wed, 9 jan 2004 19:59:09 GMT\r\n"
+ "X-Powered-By: ASP.NET\r\n"
+ "Content-Type: text/html\r\n"
+ "Set-Cookie: ASPSESSIONIDASQSSARR=CCOBBLCBOLKOECFIANBGOBAI;
path=/\r\n" // let it be for now. redundancy will be removed at a later time
+ "Cache-control: private\r\n\r\n";
public HTTPpipe( TcpClient iTcpClient, NetworkStream
iNetworkStream, StreamReader iStreamReader, StreamWriter iStreamWriter )
{
puTcpClient = iTcpClient;
puNetworkStream = iNetworkStream;
puStreamReader = iStreamReader;
puStreamWriter = iStreamWriter;
puStreamReader.Read( puArrCharRequest, 0,
puArrCharRequest.Length ); // do nothing with the request but now we know we
dont send a response before the request has been fully received.
WriteToCLient( cStrHTTPheader );
WriteToCLient( cStrResponse );
}
public void WriteToCLient( string iStrResponse )
{
puStreamWriter.Write( iStrResponse );
puStreamWriter.Flush();
}
public void Close()
{
puTcpClient.Close();
}
}
}