import java.io.*;
import java.net.*;
import java.util.*;

public class webserver
{

  static final short WPORT = 8008;  
    
  public static void main(String[] args)
    {
	ServerSocket sfd;  // listening socket
	Socket cfd;        // communication socket
	try
	    {
		sfd = new ServerSocket(WPORT,16);
		sfd.setReuseAddress(true);
	      while (true)
	       {
		cfd = sfd.accept();  // wait for client connection
		service(cfd);
		cfd.close();
	       } // while
	    }  
	catch (IOException e) {e.printStackTrace();}
    } // main

  private static void service(Socket cfd) throws IOException
    {   String oneline = "";  String word = "";
	InetAddress clientaddr = cfd.getInetAddress();
	System.out.println("connection from "+clientaddr);
	BufferedReader scin = 
          new BufferedReader(new InputStreamReader(cfd.getInputStream()));
	PrintWriter scout = 
	  new PrintWriter(new OutputStreamWriter(cfd.getOutputStream()));
	StringTokenizer st;  // for parsing
	BufferedReader fin;  // for reading local file
	
	// read 'GET' from client
	oneline = scin.readLine();
	st = new StringTokenizer(oneline);  
	while (!word.equals("GET")) word = st.nextToken(" :/");
	// read address of homepage:
	word = st.nextToken();  
	if (word.equals("HTTP")) word = "index.html";
	else if (!word.substring(0,6).equals("/home/")) 
  	    word = word.substring(7,word.length());
  	  else word = word.substring(1,word.length());
	// at this point, word is the file name we need to load.

	// open stream to local file:
	try  // in case file doesn't exist
	 {
  	  fin = new BufferedReader(new FileReader(word));
	 } 
        catch (IOException ee)   // default
	    {  	  
		  fin = new BufferedReader(new FileReader("index.html"));
	          word = "index.html";
	    } // catch

	System.out.println("file "+word+" opened");

	// send OK to client
	scout.print("HTTP/1.1 200 OK\n\0");  scout.flush();

	// serve file to client
	while (oneline != null)
	    {
		oneline = fin.readLine();
		System.out.println(oneline);
		if (oneline != null) scout.print(oneline+"\n");
	    }
	scout.flush();
	fin.close();
	scin.close();
	scout.close();
    }// service

} // class webserver