+ StringBuilder buf = new StringBuilder();
+ buf.append("<html>");
+ buf.append("<head>");
+ writeMeta(buf, "og:title", escapeHTML(title));
+ writeMeta(buf, "og:type", "website");
+ buf.append("<meta name='twitter:card' content='summary' />");
+ buf.append("<meta name='twitter:site' content='@argeo_org' />");
+ writeMeta(buf, "og:url", url);
+ if (desc != null)
+ writeMeta(buf, "og:description", escapeHTML(desc));
+ if (imgUrl != null)
+ writeMeta(buf, "og:image", imgUrl);
+ if (lastUpdate != null)
+ writeMeta(buf, "og:updated_time", Long.toString(lastUpdate.getTime().getTime()));
+ buf.append("</head>");
+ buf.append("<body>");
+ buf.append(
+ "<p><b>!! This page is meant for indexing robots, not for real people," + " visit <a href='/#")
+ .append(path).append("'>").append(escapeHTML(title)).append("</a> instead.</b></p>");
+ writeCanonical(buf, node);
+ buf.append("</body>");
+ buf.append("</html>");
+ writer.print(buf.toString());
+
+ response.setHeader("Content-Type", "text/html");
+ writer.flush();
+ } catch (Exception e) {
+ throw new CmsException("Cannot write canonical answer", e);
+ } finally {
+ JcrUtils.logoutQuietly(session);
+ }
+ }
+
+ /**
+ * From
+ * http://stackoverflow.com/questions/1265282/recommended-method-for-
+ * escaping-html-in-java (+ escaping '). TODO Use
+ * org.apache.commons.lang.StringEscapeUtils
+ */
+ private String escapeHTML(String s) {
+ StringBuilder out = new StringBuilder(Math.max(16, s.length()));
+ for (int i = 0; i < s.length(); i++) {
+ char c = s.charAt(i);
+ if (c > 127 || c == '\'' || c == '"' || c == '<' || c == '>' || c == '&') {
+ out.append("&#");
+ out.append((int) c);
+ out.append(';');
+ } else {
+ out.append(c);
+ }
+ }
+ return out.toString();
+ }
+
+ private void writeMeta(StringBuilder buf, String tag, String value) {
+ buf.append("<meta property='").append(tag).append("' content='").append(value).append("'/>");
+ }
+
+ private void writeCanonical(StringBuilder buf, Node node) throws RepositoryException {
+ buf.append("<div>");
+ if (node.hasProperty(JCR_TITLE))
+ buf.append("<p>").append(node.getProperty(JCR_TITLE).getString()).append("</p>");
+ if (node.hasProperty(JCR_DESCRIPTION))
+ buf.append("<p>").append(node.getProperty(JCR_DESCRIPTION).getString()).append("</p>");
+ NodeIterator children = node.getNodes();
+ while (children.hasNext()) {
+ writeCanonical(buf, children.nextNode());