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

public class Test extends HttpServlet {

  /*ServletContext context1, context2;

  public Test() {
    try {
     context1 = getServletContext();
    } catch (Exception exc) {
    }
  }

  public void init() {
    context2 = getServletContext();
  }
  */

  public void doGet(HttpServletRequest request,
                       HttpServletResponse response)
                 throws ServletException, IOException
  {
    /*  PrintWriter out = response.getWriter();
      out.println("context1 (w konstruktorze) = " + context1);
      out.println("context2 (w init)          = " + context2);
      out.println("context3 (w doGet)         = " + getServletContext());
      out.close();
      */
      doPost(request, response);
  }

  public void doPost(HttpServletRequest request,
                       HttpServletResponse response)
                 throws ServletException, IOException
  {
    int len = request.getContentLength();

    String charset = request.getHeader("content-encoding");
    if (charset == null) charset = "UTF-8";
    BufferedReader br = new BufferedReader (
                              new InputStreamReader(
                                 request.getInputStream(), charset)
                        );

    response.setCharacterEncoding(charset);
    /*PrintWriter out = new PrintWriter(
        new OutputStreamWriter(response.getOutputStream(), charset),
        true);
     */
    PrintWriter out = response.getWriter();
    out.println(URLEncoder.encode("Długość danych: " + len, charset));
    out.println("Headers");
    Enumeration e = request.getHeaderNames();
    while (e.hasMoreElements()) {
        String headerName = (String)e.nextElement();
        String headerValue = request.getHeader(headerName);
        out.println(headerName + ":   " + headerValue);
    }


    String line;
    while((line = br.readLine()) != null) {
      out.println(line);
    }
    br.close();
    out.close();
  }

}