package de.uhilger.wbx.web;
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import java.io.IOException;
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import java.security.Principal;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import javax.servlet.ServletException;
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import javax.servlet.ServletOutputStream;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.catalina.servlets.DefaultServlet;
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/**
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*
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*/
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public class ViewServlet extends DefaultServlet {
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private static final Logger logger = Logger.getLogger(ViewServlet.class.getName());
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private static final String HOME_CTX = "/home";
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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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String contextPath = request.getContextPath();
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if(HOME_CTX.equals(contextPath)) {
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String userName = getUserName(request);
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if (userName != null) {
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String urlUser = getUrlUser(request, userName);
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if(userName.equals(urlUser)) {
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seiteAusgeben(request, response);
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} else {
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logger.fine("Wrong user.");
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}
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} else {
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logger.fine("Missing login.");
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}
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} else {
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seiteAusgeben(request, response);
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}
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}
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private void seiteAusgeben(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
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ServletOutputStream out = response.getOutputStream();
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printHeader(out);
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super.doGet(request, response);
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printFooter(out);
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}
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private void printHeader(ServletOutputStream out) throws IOException {
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out.print("<!DOCTYPE html><html><head>");
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out.print("<link rel=\"stylesheet\" type=\"text/css\" href=\"/jslib/bootstrap/css/bootstrap.min.css\">");
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out.print("<link rel=\"stylesheet\" type=\"text/css\" href=\"stile.css\">");
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out.print("</head><body class=\"p-3\">");
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}
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private void printFooter(ServletOutputStream out) throws IOException {
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out.print("</body></html>");
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}
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private String getUrlUser(HttpServletRequest request, String userName) throws IOException {
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String result = "";
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String requestUrlStr = request.getRequestURL().toString();
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String contextPath = request.getContextPath();
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if(contextPath != null && requestUrlStr != null && userName != null) {
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int start = requestUrlStr.indexOf(contextPath);
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start += contextPath.length();
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start++;
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int end = start + userName.length();
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try {
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result = requestUrlStr.substring(start, end);
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} catch(Exception ex) {
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logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
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}
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}
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return result;
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}
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private String getUserName(HttpServletRequest hr) {
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String userName = null;
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Object p = hr.getUserPrincipal();
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if (p instanceof Principal) {
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userName = ((Principal) p).getName();
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}
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return userName;
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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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}
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}
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