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/* |
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WebBox - Dein Server. |
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Copyright (C) 2020 Ulrich Hilger, http://uhilger.de |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Affero General Public License as |
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published by the Free Software Foundation, either version 3 of the |
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License, or (at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Affero General Public License for more details. |
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You should have received a copy of the GNU Affero General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package de.uhilger.wbx.web; |
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import java.io.BufferedReader; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.IOException; |
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import java.io.InputStreamReader; |
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import java.io.PrintWriter; |
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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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import java.util.Map; |
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import static org.asciidoctor.AttributesBuilder.attributes; |
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import static org.asciidoctor.OptionsBuilder.options; |
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import static org.asciidoctor.Asciidoctor.Factory.create; |
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import org.asciidoctor.Asciidoctor; |
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/** |
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* Das AdocServlet wandelt AsciiDoc-Inhalte (*.adoc) |
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* zu HTML-Seiten |
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* |
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*/ |
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public class AdocServlet extends HttpServlet { |
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private static final String DOT = "."; |
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private static final String HTMLEXT = ".html"; |
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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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{ |
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response.setContentType("text/html;charset=UTF-8"); |
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try (PrintWriter out = response.getWriter()) { |
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// Asciidoc-Quelldatei aus HTTP-Request ermitteln |
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String vPath = request.getServletPath(); |
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String absname = getServletContext().getRealPath(vPath); |
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File adocfile = new File(absname); |
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// HTML-Datei ermitteln |
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String nameext = adocfile.getName(); |
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String fname = nameext.substring(0, nameext.lastIndexOf(DOT)); |
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File htmlfile = new File(adocfile.getParentFile(), fname + HTMLEXT); |
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/* |
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transformieren, wenn die Quelle sich geandert hat oder |
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die HTML-Datei noch nicht existiert |
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*/ |
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if(!htmlfile.exists() || adocfile.lastModified() > htmlfile.lastModified()) { |
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transform(absname); |
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} |
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FileInputStream in = new FileInputStream(htmlfile); |
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BufferedReader reader = new BufferedReader(new InputStreamReader(in)); |
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String line; |
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while ((line = reader.readLine()) != null) { |
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out.println(line); |
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} |
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} |
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} |
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private void transform(String absoluteFileName) { |
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Asciidoctor asciidoctor = create(); |
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Map<String, Object> attributes = attributes() |
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.noFooter(false) |
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//.tableOfContents(true) |
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//.sectionNumbers(true) |
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.asMap(); |
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Map<String, Object> options = options().inPlace(false) |
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.attributes(attributes) |
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.asMap(); |
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asciidoctor.convertFile(new File(absoluteFileName), options); |
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} |
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private void test(HttpServletRequest request, HttpServletResponse response) |
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throws IOException |
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{ |
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response.setContentType("text/html;charset=UTF-8"); |
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try (PrintWriter out = response.getWriter()) { |
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/* TODO output your page here. You may use following sample code. */ |
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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 AdocServlet</title>"); |
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out.println("</head>"); |
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out.println("<body>"); |
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out.println("<h1>Servlet AdocServlet at " + request.getContextPath() + "</h1>"); |
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out.println("<p>request.getRequestURI(): " + request.getRequestURI() + "</p>"); |
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out.println("<p>request.getRequestURL(): " + request.getRequestURL() + "</p>"); |
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out.println("<p>request.getServletPath(): " + request.getServletPath() + "</p>"); |
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out.println("<p>request.getPathInfo(): " + request.getPathInfo() + "</p>"); |
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String vPath = request.getServletPath(); |
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out.println("<p>vPath: " + vPath); |
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out.println("<p>getServletContext().getRealPath(vPath): " + |
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getServletContext().getRealPath(vPath) + "</p>"); |
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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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// <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 "AdocServlet"; |
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}// </editor-fold> |
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} |