/*
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* To change this license header, choose License Headers in Project Properties.
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* To change this template file, choose Tools | Templates
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* and open the template in the editor.
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*/
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package de.uhilger.wbx.web;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import javax.naming.Context;
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import javax.naming.InitialContext;
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import javax.naming.NamingException;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/**
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*
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*/
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public class TestServlet extends HttpServlet {
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private static final Logger logger = Logger.getLogger(TestServlet.class.getName());
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public static final String JNDI_CTX_NAME = "java:comp/env";
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public static final String PARAM_NAME = "wbxFileBase";
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public static final String NOT_FOUND = " nicht gefunden";
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public static final String NO_STRING = " ist kein String";
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/**
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* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
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* methods.
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*
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* @param request servlet request
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* @param response servlet response
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* @throws ServletException if a servlet-specific error occurs
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* @throws IOException if an I/O error occurs
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*/
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protected void processRequest(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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response.setContentType("text/html;charset=UTF-8");
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try (PrintWriter out = response.getWriter()) {
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out.println("<!DOCTYPE html>");
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out.println("<html>");
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out.println("<head>");
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out.println("<title>Servlet TestServlet</title>");
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out.println("</head>");
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out.println("<body>");
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out.println("<h1>Servlet TestServlet at " + request.getContextPath() + "</h1>");
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// hier kommt veraenderlicher Inhalt
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ServletContext ctx = request.getSession().getServletContext();
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Object o = ctx.getAttribute("filebase");
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String base;
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if(o instanceof String) {
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base = o.toString();
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} else {
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base = "unbekannt";
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}
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out.print("<p>filebase: ");
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out.print(base);
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out.print("</p>\n");
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out.print("<p>");
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out.print(PARAM_NAME);
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out.print(": ");
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out.print(getJNDIParameter(PARAM_NAME));
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out.print("</p>\n");
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out.print("<p>");
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out.print("Request URL: ");
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out.print(request.getRequestURL());
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out.print("</p>\n");
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// Ende des veraenderlichen Inhalts
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out.println("</body>");
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out.println("</html>");
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}
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}
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private String getJNDIParameter(String pname) {
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try {
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// unseren environment naming context ermitteln
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Context initCtx = new InitialContext();
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Context envCtx = (Context) initCtx.lookup(JNDI_CTX_NAME);
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// unseren Parameter lesen
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Object o = envCtx.lookup(pname);
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if(o instanceof String) {
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return o.toString();
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} else {
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return NO_STRING;
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}
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} catch (NamingException ex) {
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logger.log(Level.SEVERE, ex.getMessage());
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return NOT_FOUND;
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}
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}
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// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
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/**
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* Handles the HTTP <code>GET</code> method.
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*
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* @param request servlet request
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* @param response servlet response
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* @throws ServletException if a servlet-specific error occurs
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* @throws IOException if an I/O error occurs
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*/
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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processRequest(request, response);
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}
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/**
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* Handles the HTTP <code>POST</code> method.
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*
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* @param request servlet request
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* @param response servlet response
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* @throws ServletException if a servlet-specific error occurs
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* @throws IOException if an I/O error occurs
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*/
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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processRequest(request, response);
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}
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/**
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* Returns a short description of the servlet.
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*
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* @return a String containing servlet description
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*/
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@Override
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public String getServletInfo() {
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return "Short description";
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}// </editor-fold>
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}
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