From fe6b5c7ea016222a71b7fabaaf9e17a9c6074669 Mon Sep 17 00:00:00 2001
From: ulrich <undisclosed>
Date: Wed, 04 Dec 2019 17:06:52 +0000
Subject: [PATCH] Markdown-Unterstuetzung hinzugefuegt
---
src/de/uhilger/wbx/web/MdServlet.java | 152 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 152 insertions(+), 0 deletions(-)
diff --git a/src/de/uhilger/wbx/web/MdServlet.java b/src/de/uhilger/wbx/web/MdServlet.java
new file mode 100644
index 0000000..919dc63
--- /dev/null
+++ b/src/de/uhilger/wbx/web/MdServlet.java
@@ -0,0 +1,152 @@
+package de.uhilger.wbx.web;
+
+/*
+ WebBox - Dein Server.
+ Copyright (C) 2019 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/>.
+ */
+
+
+import java.io.IOException;
+import java.security.Principal;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.servlet.ServletException;
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.apache.catalina.servlets.DefaultServlet;
+
+/**
+ * Das MdServlet fügt dem DefaultServlet von Tomcat
+ * Methoden hinzu, mit denen Markdown-Inhalte (*.md)
+ * zu ganzen HTML-Seiten
+ * mit head und body tags sowie Stylesheet-Verweisen
+ * ergänzt werden
+ *
+ * Die hier hinzugefuegten Inhalte verweisen lediglich auf
+ * die Javscript-Biliothek strapdown.js
+ * (http://strapdownjs.com), das Rendern
+ * des Markdown zu HTML geschieht dann auf dem Client.
+ *
+ * TODO: Stylesheets dynamisch einbinden
+ */
+public class MdServlet extends DefaultServlet {
+
+ private static final Logger logger = Logger.getLogger(MdServlet.class.getName());
+ private static final String HOME_CTX = "/home";
+
+ private String getTitle() {
+ String title = null;
+ 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>\r\n");
+ out.print("<html><head>\r\n");
+ out.print("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"/>\r\n");
+ out.print("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\r\n");
+ out.print("<link rel=\"stylesheet\" type=\"text/css\" href=\"/jslib/sd/strapdown.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>\r\n");
+ out.print("<xmp theme=\"united\" style=\"display:none;\">\r\n");
+ }
+
+ private void printFooter(ServletOutputStream out) throws IOException {
+ out.print("\r\n</xmp>\r\n");
+ out.print("<script src=\"/jslib/sd/strapdown.js\"></script>\r\n");
+ out.print("</body></html>");
+ }
+
+ /**
+ * Handles the HTTP <code>GET</code> method.
+ *
+ * @param request servlet request
+ * @param response servlet response
+ * @throws ServletException if a servlet-specific error occurs
+ * @throws IOException if an I/O error occurs
+ */
+ @Override
+ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+ String contextPath = request.getContextPath();
+ if(HOME_CTX.equals(contextPath)) {
+ String userName = getUserName(request);
+ 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);
+ }
+ }
+
+ 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);
+ start += contextPath.length();
+ start++;
+ int end = start + userName.length();
+ try {
+ result = requestUrlStr.substring(start, end);
+ } catch(Exception ex) {
+ logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
+ }
+ }
+ return result;
+ }
+
+ protected String getUserName(HttpServletRequest hr) {
+ String userName = null;
+ Object p = hr.getUserPrincipal();
+ if (p instanceof Principal) {
+ userName = ((Principal) p).getName();
+ }
+ return userName;
+ }
+
+ /**
+ * Returns a short description of the servlet.
+ *
+ * @return a String containing servlet description
+ */
+ @Override
+ public String getServletInfo() {
+ return "MarkdownWrapper Servlet";
+ }
+
+}
--
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