wbx-lib.git - Ulrich Hilger Code Repository

			@@ -1,9 +1,29 @@
			/*
			WebBox - Dein Server.
			Copyright (C) 2017 Ulrich Hilger, http://uhilger.de

			This program is free software: you can redistribute it and/or modify
			it under the terms of the GNU Affero General Public License as
			published by the Free Software Foundation, either version 3 of the
			License, or (at your option) any later version.

			This program is distributed in the hope that it will be useful,
			but WITHOUT ANY WARRANTY; without even the implied warranty of
			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
			GNU Affero General Public License for more details.

			You should have received a copy of the GNU Affero General Public License
			along with this program. If not, see <http://www.gnu.org/licenses/>.
			*/
			package de.uhilger.wbx.web;

			import java.io.IOException;
			import java.io.OutputStream;
			import java.security.Principal;
			import java.util.logging.Level;
			import java.util.logging.Logger;
			import javax.naming.Context;
			import javax.naming.InitialContext;
			import javax.naming.NamingException;
			import javax.servlet.ServletException;
			import javax.servlet.ServletOutputStream;
			import javax.servlet.http.HttpServletRequest;
			@@ -11,12 +31,63 @@
			import org.apache.catalina.servlets.DefaultServlet;

			/**
			*
			* Das ViewServlet fügt dem DefaultServlet von Tomcat
			* Methoden hinzu, mit denen HTML-Inhalte wie sie z.B. mit
			* TinyMCE erzeugt werden zu ganzen HTML-Seiten
			* mit head und body tags sowie Stylesheet-Verweisen
			* ergänzt werden
			*
			* TODO: Stylesheets dynamisch einbinden
			*/
			public class ViewServlet extends DefaultServlet {

			private static final Logger logger = Logger.getLogger(ViewServlet.class.getName());
			private static final String HOME_CTX = "/home";

			private String getTitle() {
			String title = null;
			try {
			Object object = ((Context) new InitialContext().lookup("java:comp/env")).lookup("webBoxViewTitle");
			if(object != null) {
			title = object.toString();
			logger.finer("WebBox View Titel: " + title);
			}
			} catch (NamingException ex) {
			logger.log(Level.SEVERE, null, ex);
			}
			return title;
			}

			private void seiteAusgeben(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
			ServletOutputStream out = response.getOutputStream();
			printHeader(out, request);
			super.doGet(request, response);
			printFooter(out);
			}

			private void printHeader(ServletOutputStream out, HttpServletRequest request) throws IOException {
			out.print("<!DOCTYPE html><html><head>\r\n");
			out.print("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"/>\r\n");
			out.print("<link rel=\"stylesheet\" type=\"text/css\" href=\"/jslib/bootstrap/css/bootstrap.min.css\">\r\n");
			out.print("<link rel=\"stylesheet\" type=\"text/css\" href=\"/jslib/lightbox/lightbox.css\">\r\n");
			out.print("<link rel=\"stylesheet\" type=\"text/css\" href=\"stile.css\">\r\n");
			String title = getTitle();
			if(title != null) {
			out.print("<title>");
			out.print(title);
			out.print(" ");
			out.print(request.getRequestURI());
			out.print("</title>\r\n");
			}
			out.print("</head><body class=\"p-3\">\r\n");
			}

			private void printFooter(ServletOutputStream out) throws IOException {
			out.print("<script src=\"/jslib/jquery/jquery.min.js\"></script>\r\n");
			out.print("<script src=\"/jslib/lightbox/lightbox.min.js\"></script>\r\n");
			out.print("</body></html>");
			}

			/**
			* Handles the HTTP <code>GET</code> method.
			*
			@@ -26,64 +97,44 @@
			* @throws IOException if an I/O error occurs
			*/
			@Override
			protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
			/*
			ServletOutputStream out = response.getOutputStream();
			out.print("<!DOCTYPE html><html><head><title>Testausgabe</title></head><body>");
			super.doGet(request, response);
			out.print("</body></html>");
			*/

			protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
			String contextPath = request.getContextPath();
			if(HOME_CTX.equals(contextPath)) {
			String userName = getUserName(request);
			String requestURLStr = request.getRequestURL().toString();
			String contextPath = request.getContextPath();

			ServletOutputStream out = response.getOutputStream();
			out.print("<!DOCTYPE html><html><head><title>Testausgabe</title></head><body>");
			out.print(getHtml("userName", userName));
			out.print(getHtml("contextPath", contextPath));
			out.print(getHtml("requestURL", requestURLStr));
			out.print(getHtml("urlUser", getUrlUser(out, requestURLStr, contextPath, userName)));
			out.print("</body></html>");
			if (userName != null) {
			String urlUser = getUrlUser(request, userName);
			if(userName.equals(urlUser)) {
			seiteAusgeben(request, response);
			} else {
			logger.fine("Wrong user.");
			}
			} else {
			logger.fine("Missing login.");
			}
			} else {
			seiteAusgeben(request, response);
			}
			}

			private String getUrlUser(ServletOutputStream out, String requestUrlStr, String contextPath, String userName) throws IOException {
			String result = "urlUser nicht ermittelbar";
			protected String getUrlUser(HttpServletRequest request, String userName) {
			String result = "";
			String requestUrlStr = request.getRequestURL().toString();
			String contextPath = request.getContextPath();
			if(contextPath != null && requestUrlStr != null && userName != null) {
			int start = requestUrlStr.indexOf(contextPath);
			out.print("<p>start: " + start + "</p>");
			out.print("<p>userName.length: " + userName.length() + "</p>");
			out.print("<p>contextPath.length(): " + contextPath.length() + "</p>");
			out.print("<p>requestUrlStr.length(): " + requestUrlStr.length() + "</p>");
			start += contextPath.length();
			start++;
			out.print("<p>start: " + start + "</p>");
			int end = start + userName.length();
			try {
			result = requestUrlStr.substring(start, end);
			} catch(Exception ex) {
			result = ex.getMessage();
			logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
			}
			}
			return result;
			}

			private String getHtml(String label, String theVal) {
			StringBuffer buf = new StringBuffer();
			buf.append("<p>");
			buf.append(label);
			buf.append(": ");
			if(theVal == null) {
			buf.append("null");
			} else {
			buf.append(theVal);
			}
			buf.append("</p>");
			return buf.toString();
			}

			private String getUserName(HttpServletRequest hr) {
			protected String getUserName(HttpServletRequest hr) {
			String userName = null;
			Object p = hr.getUserPrincipal();
			if (p instanceof Principal) {
			@@ -91,7 +142,7 @@
			}
			return userName;
			}


			/**
			* Returns a short description of the servlet.
			*
			@@ -100,6 +151,6 @@
			@Override
			public String getServletInfo() {
			return "Short description";
			}// </editor-fold>
			}

			}