// HTTP SERVER
import java.io.*;
import java.net.*;
import java.util.*;
import java.lang.*;
public class HttpServer
{
public static void main(String [] args)
{
int i=1;
System.out.println("********************************************************************************");
System.out.println("****************************** HTTP
SERVER***********************************");
System.out.println("********************************************************************************");
System.out.println("Server Started...");
System.out.println("Waiting for connections...");
try
{
ServerSocket s = new ServerSocket(100);
for(;;)
{
Socket incoming = s.accept();
System.out.println("New Client Connected with id "
+ i
+" from "+incoming.getInetAddress().getHostName() );
System.out.println("
");
System.out.println("
REQUEST HEADER ");
Thread t = new ThreadedServer(incoming,i);
i++;
t.start();
}
}
catch(Exception e)
{
System.out.println("Error: " + e);
}
}
}
class ThreadedServer extends Thread
{
final static String CRLF = "";
Socket incoming;
int counter;
public ThreadedServer(Socket i,int c)
{
incoming=i;
counter=c;
}
public void run()
{
try
{
String statusline=null;
String contenttypeline=null;
String contentlength=null;
String venderline="Server: EXECUTER 1.1";
String entitybody=null;
BufferedReader in =new BufferedReader(new
InputStreamReader(incoming.getInputStream()));
PrintWriter out = new
PrintWriter(incoming.getOutputStream(), true);
OutputStream output=incoming.getOutputStream();
String headerline;
headerline=in.readLine();
System.out.println(headerline);
StringTokenizer s = new StringTokenizer(headerline);
String meth = s.nextToken();
if(meth.equals("GET")||meth.equals("POST"))
{
int dot1,dot2,fslash;
String fname,ext,FileName;
String url = s.nextToken();
dot1=url.indexOf('.');
dot2=url.lastIndexOf('.');
fslash=url.lastIndexOf('/');
fname=url.substring(dot1+1,dot2);
ext=url.substring(dot2,fslash);
FileName=fname+ext;
if(ext.equals(".html")||ext.equals(".htm"))
{
FileInputStream fis=null;
boolean filexists=true;
try
{
fis=new FileInputStream(FileName);
}
catch(FileNotFoundException e)
{
System.out.println("Exception: "+e.getMessage());
filexists=false;
}
if(filexists)
{
statusline=" HTTP/1.1 200 Ok"+CRLF;
contenttypeline="Content-Type: text/html "+CRLF;
contentlength="Content-Length:"+(new
Integer(fis.available())).toString() + CRLF;
}
else
{
statusline = "HTTP/1.0 404 Not Found" + CRLF ;
contenttypeline = "Content-Type: text/html"+CRLF;
entitybody = "<HTML>" +
"<HEAD><TITLE>404 Not Found</TITLE></HEAD>" +
"<BODY><H1>404 File Not Found</H1></BODY></HTML>" ;
}
output.write(statusline.getBytes());
output.write(venderline.getBytes());
output.write(contentlength.getBytes());
output.write(contenttypeline.getBytes());
output.write(CRLF.getBytes());
if (filexists)
{
sendBytes(fis, output) ;
fis.close();
}
else
{
output.write(entitybody.getBytes());
}
}
else
{
statusline = "HTTP/1.0 400 Not Found" + CRLF ;
contenttypeline = "Content-Type: text/html"+CRLF;
entitybody = "<HTML>" +
"<HEAD><TITLE>400</TITLE></HEAD>" +
"<BODY><H1>400 A malformed HTTP request is
reived</H1></BODY></HTML>";
}
}
else
{
statusline = "HTTP/1.0 400 Not Found" + CRLF ;
contenttypeline = "Content-Type: text/html"+CRLF ;
entitybody = "<HTML>" +
"<HEAD><TITLE>400</TITLE></HEAD>" +
"<BODY><H1>400 A malformed HTTP request is
reived</H1></BODY></HTML>";
}
boolean done=false;
while(!done)
{
headerline=in.readLine();
if(headerline == null)
done = true;
else
{
System.out.println(headerline);
}
}
incoming.close();
in.close();
out.close();
}
catch(Exception e)
{
System.out.println("Error: " + e);
}
}
private static void sendBytes(FileInputStream fis, OutputStream os)
throws Exception
{
byte[] buffer = new byte[1024] ;
int bytes = 0 ;
while ((bytes = fis.read(buffer)) != -1 )
{
os.write(buffer, 0, bytes);
}
}
}