--- /dev/null
+package org.argeo.app.servlet.publish;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URLDecoder;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.jcr.Node;
+import javax.jcr.Repository;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+import javax.jcr.nodetype.NodeType;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.transform.Result;
+import javax.xml.transform.Source;
+import javax.xml.transform.Templates;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.xalan.processor.TransformerFactoryImpl;
+import org.argeo.api.cms.CmsTheme;
+import org.argeo.app.docbook.DbkType;
+import org.argeo.app.docbook.DbkUtils;
+import org.argeo.cms.auth.RemoteAuthUtils;
+import org.argeo.cms.servlet.ServletHttpRequest;
+import org.argeo.jcr.Jcr;
+import org.argeo.jcr.JcrException;
+import org.argeo.jcr.JcrUtils;
+import org.w3c.dom.Document;
+
+/**
+ * A servlet transforming a dbk:* JCR node into HTML, using the DocBook XSL.
+ */
+public class DbkServlet extends HttpServlet {
+ private static final long serialVersionUID = 6906020513498289335L;
+
+ private Repository repository;
+
+ private DocumentBuilderFactory documentBuilderFactory;
+ private TransformerFactory transformerFactory;
+ private Templates docBoookTemplates;
+
+ private Map<String, CmsTheme> themes = Collections.synchronizedMap(new HashMap<>());
+
+ @Override
+ protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+
+ String pathInfo = req.getPathInfo();
+ if (pathInfo.startsWith("//"))
+ pathInfo = pathInfo.substring(1);
+ String path = URLDecoder.decode(pathInfo, StandardCharsets.UTF_8);
+
+ if (path.toLowerCase().endsWith(".css")) {
+ path = path.substring(1);
+ int firstSlash = path.indexOf('/');
+ String themeId = path.substring(0, firstSlash);
+ String cssPath = path.substring(firstSlash);
+ CmsTheme cmsTheme = themes.get(themeId);
+ if (cmsTheme == null)
+ throw new IllegalArgumentException("Theme " + themeId + " not found.");
+ resp.setContentType("text/css");
+ IOUtils.copy(cmsTheme.getResourceAsStream(cssPath), resp.getOutputStream());
+ return;
+ }
+
+ if (path.toLowerCase().endsWith("/index.html")) {
+ path = path.substring(0, path.length() - "/index.html".length());
+ }
+
+ Session session = null;
+ try {
+ session = RemoteAuthUtils.doAs(() -> Jcr.login(repository, null), new ServletHttpRequest(req));
+ Node node = session.getNode(path);
+
+ if (node.hasNode(DbkType.article.get())) {
+ Node dbkNode = node.getNode(DbkType.article.get());
+ if (DbkUtils.isDbk(dbkNode)) {
+ CmsTheme cmsTheme = null;
+ String themeId = req.getParameter("themeId");
+ if (themeId != null) {
+ cmsTheme = themes.get(themeId);
+ if (cmsTheme == null)
+ throw new IllegalArgumentException("Theme " + themeId + " not found.");
+ }
+
+ // TODO customise DocBook so that it outputs UTF-8
+ // see http://www.sagehill.net/docbookxsl/OutputEncoding.html
+ resp.setContentType("text/html; charset=ISO-8859-1");
+
+ // TODO optimise with pipes, SAX, etc. ?
+ byte[] arr;
+ try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
+ session.exportDocumentView(dbkNode.getPath(), out, true, false);
+ arr = out.toByteArray();
+// System.out.println(new String(arr, StandardCharsets.UTF_8));
+ } catch (RepositoryException e) {
+ throw new JcrException(e);
+ }
+
+ try (InputStream in = new ByteArrayInputStream(arr);
+// ByteArrayOutputStream out = new ByteArrayOutputStream();
+ ) {
+
+ Result xmlOutput = new StreamResult(resp.getOutputStream());
+
+ DocumentBuilder docBuilder = documentBuilderFactory.newDocumentBuilder();
+// Document doc = docBuilder.parse(new File(
+// System.getProperty("user.home") + "/dev/git/gpl/argeo-qa/doc/platform/argeo-platform.dbk.xml"));
+ Document doc = docBuilder.parse(in);
+ Source xmlInput = new DOMSource(doc);
+
+ Transformer transformer = docBoookTemplates.newTransformer();
+
+ // gather CSS
+ if (cmsTheme != null) {
+ StringBuilder sb = new StringBuilder();
+ for (String cssPath : cmsTheme.getWebCssPaths()) {
+ sb.append(req.getContextPath()).append(req.getServletPath()).append('/');
+ sb.append(themeId).append('/').append(cssPath).append(' ');
+ }
+ // FIXME make it more generic
+ sb.append("https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap")
+ .append(' ');
+ sb.append(
+ "https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,300;0,400;0,600;1,400&display=swap")
+ .append(' ');
+ if (sb.length() > 0)
+ transformer.setParameter("html.stylesheet", sb.toString());
+ }
+ transformer.transform(xmlInput, xmlOutput);
+// resp.getOutputStream().write(out.toByteArray());
+ } catch (Exception e) {
+ throw new ServletException("Cannot transform " + path, e);
+ }
+ }
+ } else {
+ if (node.isNodeType(NodeType.NT_FILE)) {// media download etc.
+ String fileNameLowerCase = node.getName().toLowerCase();
+ if (fileNameLowerCase.endsWith(".jpg") || fileNameLowerCase.endsWith(".jpeg")) {
+ resp.setContentType("image/jpeg");
+ } else if (fileNameLowerCase.endsWith(".png")) {
+ resp.setContentType("image/png");
+ } else if (fileNameLowerCase.endsWith(".gif")) {
+ resp.setContentType("image/gif");
+ } else if (fileNameLowerCase.endsWith(".svg")) {
+ resp.setContentType("image/svg+xml");
+ } else {
+ // TODO know more content types...
+ resp.setHeader("Content-Disposition", "attachment; filename=\"" + node.getName() + "\"");
+ }
+ IOUtils.copy(JcrUtils.getFileAsStream(node), resp.getOutputStream());
+ } else {
+ throw new IllegalArgumentException("Unsupported node " + node);
+ }
+ }
+ } catch (RepositoryException e1) {
+ throw new JcrException(e1);
+ } finally {
+ Jcr.logout(session);
+ }
+ }
+
+ @Override
+ public void init() throws ServletException {
+
+ // TODO improve configuration and provisioning of DocBook XSL
+ String xslBase = System.getProperty("argeo.docbook.xsl");
+ if (xslBase == null) {
+ // We need namespace aware XSL!
+ // Fedora (sudo dnf install docbook5-style-xsl)
+ String defaultXslBase = "/usr/share/sgml/docbook/xsl-ns-stylesheets";
+ if (!Files.exists(Paths.get(defaultXslBase))) {
+ defaultXslBase = "/opt/docbook-xsl";
+ if (!Files.exists(Paths.get(defaultXslBase))) {
+ throw new ServletException("System property argeo.docbook.xsl is not set and default location "
+ + defaultXslBase + " does not exist.");
+ }
+ }
+ xslBase = defaultXslBase;
+
+ }
+ String xsl = xslBase + "/html/docbook.xsl";
+
+ documentBuilderFactory = DocumentBuilderFactory.newInstance();
+ documentBuilderFactory.setXIncludeAware(true);
+ documentBuilderFactory.setNamespaceAware(true);
+
+ // We must explicitly use the non-XSLTC transformer, as XSLTC is not working
+ // with DocBook stylesheets
+ transformerFactory = new TransformerFactoryImpl();
+
+ Source xslSource = new StreamSource(xsl);
+ try {
+ docBoookTemplates = transformerFactory.newTemplates(xslSource);
+ if (docBoookTemplates == null)
+ throw new ServletException("Could not instantiate XSL " + xsl);
+ } catch (TransformerConfigurationException e) {
+ throw new ServletException("Cannot instantiate XSL " + xsl, e);
+ }
+ }
+
+ public void setRepository(Repository repository) {
+ this.repository = repository;
+ }
+
+ public void addTheme(CmsTheme theme, Map<String, String> properties) {
+ themes.put(theme.getThemeId(), theme);
+ }
+
+ public void removeTheme(CmsTheme theme, Map<String, String> properties) {
+ themes.remove(theme.getThemeId());
+ }
+
+}
projects / gpl / argeo-suite.git / blobdiff