mirror of
https://github.com/octoleo/plantuml-server.git
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HTTP redirect after POST
This commit is contained in:
Arnaud Roques
parent
e7ed068417
commit
94fb4cd383
@ -24,25 +24,24 @@
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package net.sourceforge.plantuml.servlet;
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import java.io.IOException;
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import java.net.URLDecoder;
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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.StringTokenizer;
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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.FileFormat;
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import net.sourceforge.plantuml.FileFormatOption;
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import net.sourceforge.plantuml.SourceStringReader;
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import net.sourceforge.plantuml.StringUtils;
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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.servlet.utility.Configuration;
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import net.sourceforge.plantuml.api.PlantumlUtils;
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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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@ -50,7 +49,7 @@ import net.sourceforge.plantuml.api.PlantumlUtils;
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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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*
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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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@ -59,120 +58,133 @@ import net.sourceforge.plantuml.api.PlantumlUtils;
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@SuppressWarnings("serial")
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public class PlantUmlServlet extends HttpServlet {
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private static final Pattern URL_PATTERN = Pattern.compile(".*/(.*)"); // Last part of the URL
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private static final Pattern ENCODED_PATTERN = Pattern.compile("^[a-zA-Z0-9\\-\\_]+$"); // Format of a compressed
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// diagram
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private static final Pattern START_PATTERN = Pattern.compile("/\\w+/start/(.*)");
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private static final String DEFAULT_ENCODED_TEXT = "SyfFKj2rKt3CoKnELR1Io4ZDoSa70000";
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@Override
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public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
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// Last part of the URL
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public static final Pattern urlPattern = Pattern.compile("^.*[^a-zA-Z0-9\\-\\_]([a-zA-Z0-9\\-\\_]+)");
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final String uri = request.getRequestURI();
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Matcher startumlMatcher = START_PATTERN.matcher(uri);
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if (startumlMatcher.matches()) {
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System.out.println("PlantUML WARNING This syntax is deprecated.");
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String source = startumlMatcher.group(1);
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handleImage(response, source, uri);
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} else {
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doPost(request, response);
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}
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}
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// Format of a compressed diagram
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public static final Pattern encodedPattern = Pattern.compile("^[a-zA-Z0-9\\-\\_]+$");
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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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private static final Pattern recoverUmlPattern = Pattern.compile("/\\w+/uml/(.*)");
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request.setCharacterEncoding("UTF-8");
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String text = request.getParameter("text");
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String url = request.getParameter("url");
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String encoded = "";
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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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Transcoder transcoder = getTranscoder();
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// the URL form has been submitted
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if (url != null && !url.trim().isEmpty()) {
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// Catch the last part of the URL if necessary
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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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// Check it's a valid compressed text
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Matcher m2 = ENCODED_PATTERN.matcher(url);
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if (m2.find()) {
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url = m2.group(0);
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text = transcoder.decode(url);
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} else {
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System.out.println("PlantUML ERROR Not a valid compressed string : " + url);
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}
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}
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// the Text form has been submitted
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if (text != null && !text.trim().isEmpty()) {
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encoded = transcoder.encode(text);
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}
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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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request.setAttribute("decoded", text);
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request.setAttribute("encoded", encoded);
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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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// 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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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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// forward to index.jsp
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RequestDispatcher dispatcher = request.getRequestDispatcher("/index.jsp");
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dispatcher.forward(request, response);
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return;
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}
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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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public void init() throws ServletException {
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getServletConfig().getServletContext().setAttribute("cfg", Configuration.get());
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}
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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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@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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// This method will be removed in a near future, please don't use it.
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private void handleImage(HttpServletResponse response, String source, String uri) throws IOException {
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source = URLDecoder.decode(source, "UTF-8");
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StringBuilder plantUmlSource = new StringBuilder();
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String text = request.getParameter("text");
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String encoded = DEFAULT_ENCODED_TEXT;
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StringTokenizer tokenizer = new StringTokenizer(source, "/@");
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while (tokenizer.hasMoreTokens()) {
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String token = tokenizer.nextToken();
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plantUmlSource.append(token).append("\n");
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}
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sendImage(response, plantUmlSource.toString(), uri);
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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 = recoverUmlPattern.matcher(request.getRequestURI());
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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 = urlPattern.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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// This method will be removed in a near future, please don't use it.
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private void sendImage(HttpServletResponse response, String text, String uri) throws IOException {
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final String uml;
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if (text.startsWith("@startuml")) {
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uml = text;
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} else {
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StringBuilder plantUmlSource = new StringBuilder();
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plantUmlSource.append("@startuml\n");
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plantUmlSource.append(text);
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if (text.endsWith("\n") == false) {
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plantUmlSource.append("\n");
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}
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plantUmlSource.append("@enduml");
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uml = plantUmlSource.toString();
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}
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// Write the first image to "os"
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long today = System.currentTimeMillis();
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if (StringUtils.isDiagramCacheable(uml)) {
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// Add http headers to force the browser to cache the image
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response.addDateHeader("Expires", today + 31536000000L);
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// today + 1 year
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response.addDateHeader("Last-Modified", 1261440000000L);
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// 2009 dec 22 constant date in the past
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response.addHeader("Cache-Control", "public");
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}
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response.setContentType("image/png");
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SourceStringReader reader = new SourceStringReader(uml);
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reader.generateImage(response.getOutputStream(), new FileFormatOption(FileFormat.PNG, false));
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}
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}
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@ -45,7 +45,7 @@
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</servlet>
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<!-- Patterns of the servlet -->
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<servlet-mapping>
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<servlet-name>welcome</servlet-name>
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<servlet-name>plantumlservlet</servlet-name>
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<url-pattern>/welcome</url-pattern>
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</servlet-mapping>
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<servlet-mapping>
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