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

public class Environment extends HttpServlet{

	//Skriver ut ett antal miljšvariabler
	public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException{
		res.setContentType("text/plain");
		PrintWriter out = res.getWriter();
		Enumeration iter = null;
		String[] values = null;
		Cookie[] cookies = null;
		String tmp = null;
		out.println("SERVER-SIDE INFORMATION:\n¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤\n\n");
		out.println("SERVLET INFORMATION:\n\tServlet name: " + getServletName() + "\n");
		out.println("SERVLET INIT PARAMETERS:");
		iter = getInitParameterNames();
		while (iter.hasMoreElements()){
			tmp = (String)iter.nextElement();
			out.println("\t" + tmp + ": " + getInitParameter(tmp));
		}
		out.println("\nCONTEXT INIT PARAMETERS:");
		iter = getServletContext().getInitParameterNames();
		while (iter.hasMoreElements()){
			tmp = (String)iter.nextElement();
			out.println("\t" + tmp + ": " + getServletContext().getInitParameter(tmp));
		}
		out.println("\nSERVER INFORMATION:");
		out.println("\tServer name: " + req.getServerName());
		out.println("\tServer port: " + req.getServerPort());
		out.println("\tServer info: " + getServletContext().getServerInfo() + "\n\nSERVER ATTRIBUTES:");
		iter = getServletContext().getAttributeNames();
		while (iter.hasMoreElements()){
			tmp = (String)iter.nextElement();
			out.println("\t" + tmp + ": " + getServletContext().getAttribute(tmp));
		}
		out.println("\nRUNTIME VERSIONS:\n\tMajor webserver version: " + getServletContext().getMajorVersion());
		out.println("\tMinor webserver version: " + getServletContext().getMinorVersion());
		out.println("\tJDK version: " + System.getProperty("java.version") + "\n\n");
		out.println("CLIENT-SIDE INFORMATION:\n¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤\n\n");
		out.println("CLIENT INFORMATION:");
		out.println("\tRemote address: " + req.getRemoteAddr());
		out.println("\tRemote host: " + req.getRemoteHost());
		out.println("\tRemote user: " + req.getRemoteUser());
		out.println("\tAuthentication type: " + req.getAuthType());
		out.println("\nHEADERS:");
		iter = req.getHeaderNames();
		while (iter.hasMoreElements()){
			tmp = (String)iter.nextElement();
			out.println("\t" + tmp + ": " + req.getHeader(tmp));
		}
		out.println("\nREQUEST PARAMETERS:");
		out.println("\tQuery string: " + req.getQueryString());
		out.println("\tCharacter encoding: " + req.getCharacterEncoding());
		out.println("\tContent length: " + Integer.toString(req.getContentLength()));
		out.println("\tContent type: " + req.getContentType() + "\n");
		out.println("REQUEST PARAMETERS, ONE BY ONE:");
		iter = req.getParameterNames();
		while (iter.hasMoreElements()){
			tmp = (String)iter.nextElement();
			out.println("\t" + tmp + ": ");
			values = req.getParameterValues(tmp);
			for(int i = 0; i < values.length; i++)
				out.println("\t\tValue nr " + i + ": " + values[i]);
		}
		out.println("\nCOOKIES, ONE BY ONE:");
		cookies = req.getCookies();
		if (cookies != null){
			for(int i = 0; i < cookies.length; i++)
				out.println("\t" + cookies[i].getName() + ": " + cookies[i].getValue());
		}
		out.println("\nPATH AND CONNECTION INFORMATION:");
		out.println("\tPath info: " + req.getPathInfo());
		out.println("\tTranslated path: " + req.getPathTranslated());
		out.println("\tRequest URI: " + req.getRequestURI());
		out.println("\tRequest URL: " + req.getRequestURL());
		out.println("\tRequest scheeme: " + req.getScheme());
		out.println("\tContext path: " + req.getContextPath());
		out.println("\tServlet path: " + req.getServletPath());
		out.println("\tRequest protocol: " + req.getProtocol());
		out.println("\tRequest method: " + req.getMethod() + "\n");
		out.println("REQUEST ATTRIBUTES:");
		iter = req.getAttributeNames();
		while (iter.hasMoreElements()){
			tmp = (String)iter.nextElement();
			out.println("\t" + tmp + ": " + req.getAttribute(tmp));
		}
	}
}