package de.uhilger.wbx.web;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.security.Principal;
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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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/**
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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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/*
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ServletOutputStream out = response.getOutputStream();
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out.print("<!DOCTYPE html><html><head><title>Testausgabe</title></head><body>");
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super.doGet(request, response);
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out.print("</body></html>");
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*/
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String userName = getUserName(request);
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String requestURLStr = request.getRequestURL().toString();
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String contextPath = request.getContextPath();
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ServletOutputStream out = response.getOutputStream();
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out.print("<!DOCTYPE html><html><head><title>Testausgabe</title></head><body>");
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out.print(getHtml("userName", userName));
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out.print(getHtml("contextPath", contextPath));
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out.print(getHtml("requestURL", requestURLStr));
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out.print(getHtml("urlUser", getUrlUser(out, requestURLStr, contextPath, userName)));
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out.print("</body></html>");
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}
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private String getUrlUser(ServletOutputStream out, String requestUrlStr, String contextPath, String userName) throws IOException {
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String result = "urlUser nicht ermittelbar";
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if(contextPath != null && requestUrlStr != null && userName != null) {
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int start = requestUrlStr.indexOf(contextPath);
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out.print("<p>start: " + start + "</p>");
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out.print("<p>userName.length: " + userName.length() + "</p>");
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out.print("<p>contextPath.length(): " + contextPath.length() + "</p>");
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out.print("<p>requestUrlStr.length(): " + requestUrlStr.length() + "</p>");
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start += contextPath.length();
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start++;
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out.print("<p>start: " + start + "</p>");
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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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result = ex.getMessage();
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}
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}
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return result;
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}
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private String getHtml(String label, String theVal) {
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StringBuffer buf = new StringBuffer();
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buf.append("<p>");
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buf.append(label);
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buf.append(": ");
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if(theVal == null) {
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buf.append("null");
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} else {
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buf.append(theVal);
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}
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buf.append("</p>");
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return buf.toString();
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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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}// </editor-fold>
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}
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