191 lines
6.9 KiB
Java
191 lines
6.9 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* Project Info: https://plantuml.com
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*/
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package net.sourceforge.plantuml.servlet;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import javax.net.ssl.HttpsURLConnection;
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import javax.servlet.RequestDispatcher;
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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 net.sourceforge.plantuml.OptionFlags;
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import net.sourceforge.plantuml.api.PlantumlUtils;
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import net.sourceforge.plantuml.code.Transcoder;
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import net.sourceforge.plantuml.code.TranscoderUtil;
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import net.sourceforge.plantuml.png.MetadataTag;
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/**
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* Original idea from Achim Abeling for Confluence macro
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*
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* This class is the old all-in-one historic implementation of the PlantUml server.
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* See package.html for the new design. It's a work in progress.
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*
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* Modified by Arnaud Roques
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* Modified by Pablo Lalloni
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* Modified by Maxime Sinclair
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*/
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@SuppressWarnings("SERIAL")
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public class PlantUmlServlet extends HttpServlet {
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private static final String DEFAULT_ENCODED_TEXT = "SyfFKj2rKt3CoKnELR1Io4ZDoSa70000";
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// Last part of the URL
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public static final Pattern URL_PATTERN = Pattern.compile("^.*[^a-zA-Z0-9\\-\\_]([a-zA-Z0-9\\-\\_]+)");
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private static final Pattern RECOVER_UML_PATTERN = Pattern.compile("/uml/(.*)");
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static {
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OptionFlags.ALLOW_INCLUDE = false;
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if ("true".equalsIgnoreCase(System.getenv("ALLOW_PLANTUML_INCLUDE"))) {
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OptionFlags.ALLOW_INCLUDE = true;
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}
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}
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@Override
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public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
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request.setCharacterEncoding("UTF-8");
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String text = request.getParameter("text");
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String metadata = request.getParameter("metadata");
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if (metadata != null) {
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InputStream img = null;
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try {
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img = getImage(new URL(metadata));
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MetadataTag metadataTag = new MetadataTag(img, "plantuml");
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String data = metadataTag.getData();
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if (data != null) {
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text = data;
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}
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} finally {
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if (img != null) {
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img.close();
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}
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}
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}
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try {
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text = getTextFromUrl(request, text);
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} catch (Exception e) {
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e.printStackTrace();
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}
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// no Text form has been submitted
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if (text == null || text.trim().isEmpty()) {
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redirectNow(request, response, DEFAULT_ENCODED_TEXT);
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return;
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}
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final String encoded = getTranscoder().encode(text);
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request.setAttribute("decoded", text);
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request.setAttribute("encoded", encoded);
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// check if an image map is necessary
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if (text != null && PlantumlUtils.hasCMapData(text)) {
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request.setAttribute("mapneeded", Boolean.TRUE);
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}
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// forward to index.jsp
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final RequestDispatcher dispatcher = request.getRequestDispatcher("/index.jsp");
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dispatcher.forward(request, response);
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}
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
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IOException {
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request.setCharacterEncoding("UTF-8");
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String text = request.getParameter("text");
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String encoded = DEFAULT_ENCODED_TEXT;
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try {
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text = getTextFromUrl(request, text);
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encoded = getTranscoder().encode(text);
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} catch (Exception e) {
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e.printStackTrace();
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}
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redirectNow(request, response, encoded);
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}
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private String getTextFromUrl(HttpServletRequest request, String text) throws IOException {
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String url = request.getParameter("url");
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final Matcher recoverUml = RECOVER_UML_PATTERN.matcher(request.getRequestURI().substring(
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request.getContextPath().length()));
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// the URL form has been submitted
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if (recoverUml.matches()) {
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final String data = recoverUml.group(1);
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text = getTranscoder().decode(data);
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} else if (url != null && !url.trim().isEmpty()) {
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// Catch the last part of the URL if necessary
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final Matcher m1 = URL_PATTERN.matcher(url);
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if (m1.find()) {
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url = m1.group(1);
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}
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text = getTranscoder().decode(url);
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}
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return text;
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}
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private void redirectNow(HttpServletRequest request, HttpServletResponse response, String encoded)
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throws IOException {
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final String result = request.getContextPath() + "/uml/" + encoded;
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response.sendRedirect(result);
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}
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private Transcoder getTranscoder() {
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return TranscoderUtil.getDefaultTranscoder();
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}
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static private HttpURLConnection getConnection(URL url) throws IOException {
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if (url.getProtocol().startsWith("https")) {
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HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
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con.setRequestMethod("GET");
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con.setReadTimeout(10000); // 10 seconds
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// printHttpsCert(con);
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con.connect();
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return con;
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} else {
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HttpURLConnection con = (HttpURLConnection) url.openConnection();
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con.setRequestMethod("GET");
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con.setReadTimeout(10000); // 10 seconds
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con.connect();
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return con;
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}
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}
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static public InputStream getImage(URL url) throws IOException {
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InputStream is = null;
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HttpURLConnection con = getConnection(url);
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is = con.getInputStream();
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return is;
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}
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}
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