/*
 * This is an example servlet that echoes to the browser the servlet
 * request information as well as information about the request
 * protocol, requester host name and address, and the receiving 
 * server name and port number. Request parameters are assumed to
 * to be in an invocation query string following the servlet name.
 */

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;

/**
  * Example ReqInfoServlet -- Demonstrates various methods for obtaining
  * information about the request, scheme, protocol, receiving server,
  * and remote server and echoing that information to the browser page.
  */

public class ReqInfoServlet extends HttpServlet
{

    /**
      * @param req Instance of class HttpServletRequest.
      * @param res Instance of class HttpServletResponse.
      * @exception IOException When writing the servlet info to the
      * browser page or getting the query string.
      */
        public void service(HttpServletRequest req, HttpServletResponse res)
                throws IOException
        {
	  //	  log("in it, boy!!");
	  String cookieSheet = this.getInitParameter("cookiePage");

                ServletOutputStream os;
                Enumeration paramNames;
                String paramName, paramValue;
                Enumeration hdrNames;
                String hdrDate, hdrName, hdrValue;      
		Enumeration initParamNames;
		String initParamName, initParamValue;
                /* set the output content type and get 
                   an output stream for the response */
                res.setContentType("text/html");
                PrintWriter pw = new PrintWriter(res.getOutputStream());
		pw.println("<pre>");

                /* get and print request protocol and scheme information */
                pw.println("Request protocol is " + 
                   req.getProtocol());
               pw.println("Request scheme is " + req.getScheme());
                
                /* get and print requester information */
                pw.println("Remote host is " + req.getRemoteHost());
                pw.println("Server name is " + req.getServerName());
                pw.println("Remote address is " + req.getRemoteAddr());
                
                /* get and print receiver server information */
                pw.println("Receiving server is " + req.getServerName() + 
                        " on port number " + req.getServerPort());

		pw.println("Servlet path is " + req.getServletPath());

		//		log("finished first paragraph");

                /* put the request header names
                   into an Enumeration of strings */
                hdrNames = req.getHeaderNames();

                /* loop through name Enumeration, get matching
                   value, and print name/value pair */
                pw.println();
                pw.println("Header data is:"); 
                while(hdrNames.hasMoreElements())
                {
                        /* get the next name from the 
                           Enumeration of parameters */
                        hdrName = (String)hdrNames.nextElement();

                        /* get the value of the parameter */
                        hdrValue = (String)req.getHeader(hdrName);
                        
                        /* print the name/value pair to the browser */
                        pw.println("name = " + hdrName + "; value = " + hdrValue);
                }
                pw.println();

		//		log("finished headers");

                /* put the request parameters
                   into an Enumeration of strings */
                paramNames = req.getParameterNames();

                /* loop through name Enumeration,get matching
                   value, and print name/value pair */
                pw.println("Request parameters are:");
                while(paramNames.hasMoreElements())
                {
                        /* get the next name from the 
                           Enumeration of parameters */
                        paramName = (String)paramNames.nextElement();

                        /* get the value of the parameter */
                        paramValue = (String)req.getParameter(paramName);
                        
                        /* print the name/value pair to the browser */
                        pw.println("name = " + paramName + "; value = " + paramValue);
                }
		pw.println();
		
		//		log("finished parameters");

		pw.println("Query string: " + req.getQueryString());
		pw.println("Path info: " + req.getPathInfo());
		pw.println("Translated path info: " + req.getPathTranslated());
		pw.println("Mime guess: " + getServletContext().getMimeType(req.getPathInfo()));
		pw.println();

		initParamNames = this.getInitParameterNames();
		pw.println("Init parameters are:");
		while(initParamNames.hasMoreElements()) {
		  initParamName = (String)initParamNames.nextElement();
		  initParamValue = (String)this.getInitParameter(initParamName);
		  pw.println("name = " + initParamName + "; value = " + initParamValue);
		}
		pw.println();

		//		log("finished extras");

		Date exp = new Date();
		exp.setYear(exp.getYear() + 5);
		//		log("exp: " + exp.toString());
		Util.setCookie(res, "cnum", "043667897", exp, "/", null, false);

		/*
		c = new Cookie("name", "Christopher Fry");
		c.setDomain(req.getServerName());
		c.setPath("/");
		c.setMaxAge(1000000000);
		res.addCookie(c);
		*/

		/*
		Cookie[] cooks;
//		log("finished init");
		cooks = req.getCookies();
//		log("finished call");

		pw.println("Cookies:");
		if(cooks != null)
		  for(int i = 0; i < cooks.length; i++)
		    pw.println(cooks[i].getDomain() + " " + cooks[i].getPath() + " " + cooks[i].getMaxAge() + " " + cooks[i].getName() + "=" + cooks[i].getValue());

		pw.println("</pre>");

//		log("finished cookie display");
		*/

		pw.println("Cookies:");
		String cook = req.getHeader("Cookie");
		if(cook != null) {
		  StringTokenizer t = new StringTokenizer(cook, ";\n");
		  String nvp, name, value;
		  while(t.hasMoreTokens()) {
		    nvp = t.nextToken();
		    if(nvp.charAt(0) == ' ')
		      nvp = new String(nvp.substring(1));
		    int l = nvp.indexOf('=');
		    if(l != -1) {
		      name = new String(nvp.substring(0, l));
		      value = new String(nvp.substring(l+1));
		      pw.println(name + " = " + value);
		    }
		  }
		}

		/* open and display javascript cookie stuff */
		if(cookieSheet != null) {
		  //		  log("attempting to open cookie file: " + cookieSheet);
		  File f = new File(cookieSheet);
		  FileInputStream fin = new FileInputStream(f);
		  DataInputStream din = new DataInputStream(fin);
		  String line;

		  while((line = din.readLine()) != null)
		    pw.println(line);

		  //		  log("finished cookie form printing");
		}

                /* flush and close the PrintWriter */
                pw.flush();
                pw.close();

        } // end of service()
} // end of class ReqInfoServlet