/**Servlet generating it's environment variables and sends them marked up with HTML.
* Internet Programming 2 - Course
* @author Martin Carlsson
*/
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import mixer.*;

public class EnvironmentVariablesHTML extends HttpServlet {
    
    private String htmlFileName ="enviroment-variables-html.htm";
    private static String htmlFile = null;    
    private static String servletRoot = "/enviroment-variables-html";
    
    public void init() {
         if(htmlFile == null) {
            htmlFile = Mixer.getContent(new File(getServletContext().getRealPath(servletRoot+"\\"+htmlFileName)));
         }
    }
     
    public void doGet(HttpServletRequest req, HttpServletResponse res) 
                                throws IOException, ServletException {
       
        Mixer m = new Mixer(htmlFile);                            
        res.setContentType("text/html");
        PrintWriter out = res.getWriter();
        m.add("<!--===xxx===-->","_m_",req.getServerName() + " on port " + req.getServerPort() );
        m.add("<!--===xxx===-->","_m_","_________________________Enviroment Variables_________________________");                           
        
        Map<String,String> environmentVariables = System.getenv();
        for (Iterator<Map.Entry<String,String>> iter = environmentVariables.entrySet().iterator(); iter.hasNext(); ) {            
            Map.Entry<String,String> entry = iter.next();
            m.add("<!--===xxx===-->","_m_",entry.getKey() + " = " + entry.getValue());
        }
        out.println(m.getMix());
    }
} // End class EnvironmentVariablesHTML