+++ /dev/null
-package org.argeo.cms.jcr.internal.servlet;
-
-import static javax.jcr.Property.JCR_DESCRIPTION;
-import static javax.jcr.Property.JCR_LAST_MODIFIED;
-import static javax.jcr.Property.JCR_TITLE;
-
-import java.io.IOException;
-import java.io.PrintWriter;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.security.PrivilegedExceptionAction;
-import java.util.Calendar;
-import java.util.Collection;
-
-import javax.jcr.Node;
-import javax.jcr.NodeIterator;
-import javax.jcr.Repository;
-import javax.jcr.RepositoryException;
-import javax.jcr.Session;
-import javax.security.auth.Subject;
-import javax.security.auth.login.LoginContext;
-import javax.security.auth.login.LoginException;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServlet;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-
-import org.argeo.api.cms.CmsAuth;
-import org.argeo.api.cms.CmsConstants;
-import org.argeo.cms.jcr.CmsJcrUtils;
-import org.argeo.jcr.JcrUtils;
-import org.osgi.framework.BundleContext;
-import org.osgi.framework.FrameworkUtil;
-import org.osgi.framework.ServiceReference;
-
-public class LinkServlet extends HttpServlet {
- private final BundleContext bc = FrameworkUtil.getBundle(getClass()).getBundleContext();
-
- private static final long serialVersionUID = 3749990143146845708L;
-
- @Override
- protected void service(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- String path = request.getPathInfo();
- String userAgent = request.getHeader("User-Agent").toLowerCase();
- boolean isBot = false;
- // boolean isCompatibleBrowser = false;
- if (userAgent.contains("bot") || userAgent.contains("facebook") || userAgent.contains("twitter")) {
- isBot = true;
- }
- // else if (userAgent.contains("webkit") ||
- // userAgent.contains("gecko") || userAgent.contains("firefox")
- // || userAgent.contains("msie") || userAgent.contains("chrome") ||
- // userAgent.contains("chromium")
- // || userAgent.contains("opera") || userAgent.contains("browser"))
- // {
- // isCompatibleBrowser = true;
- // }
-
- if (isBot) {
- // log.warn("# BOT " + request.getHeader("User-Agent"));
- canonicalAnswer(request, response, path);
- return;
- }
-
- // if (isCompatibleBrowser && log.isTraceEnabled())
- // log.trace("# BWS " + request.getHeader("User-Agent"));
- redirectTo(response, "/#" + path);
- }
-
- private void redirectTo(HttpServletResponse response, String location) {
- response.setHeader("Location", location);
- response.setStatus(HttpServletResponse.SC_FOUND);
- }
-
- // private boolean canonicalAnswerNeededBy(HttpServletRequest request) {
- // String userAgent = request.getHeader("User-Agent").toLowerCase();
- // return userAgent.startsWith("facebookexternalhit/");
- // }
-
- /** For bots which don't understand RWT. */
- private void canonicalAnswer(HttpServletRequest request, HttpServletResponse response, String path) {
- Session session = null;
- try {
- PrintWriter writer = response.getWriter();
- session = Subject.doAs(anonymousLogin(), new PrivilegedExceptionAction<Session>() {
-
- @Override
- public Session run() throws Exception {
- Collection<ServiceReference<Repository>> srs = bc.getServiceReferences(Repository.class,
- "(" + CmsConstants.CN + "=" + CmsConstants.EGO_REPOSITORY + ")");
- Repository repository = bc.getService(srs.iterator().next());
- return repository.login();
- }
-
- });
- Node node = session.getNode(path);
- String title = node.hasProperty(JCR_TITLE) ? node.getProperty(JCR_TITLE).getString() : node.getName();
- String desc = node.hasProperty(JCR_DESCRIPTION) ? node.getProperty(JCR_DESCRIPTION).getString() : null;
- Calendar lastUpdate = node.hasProperty(JCR_LAST_MODIFIED) ? node.getProperty(JCR_LAST_MODIFIED).getDate()
- : null;
- String url = getCanonicalUrl(node, request);
- String imgUrl = null;
- // TODO support images
-// loop: for (NodeIterator it = node.getNodes(); it.hasNext();) {
-// // Takes the first found cms:image
-// Node child = it.nextNode();
-// if (child.isNodeType(CMS_IMAGE)) {
-// imgUrl = getDataUrl(child, request);
-// break loop;
-// }
-// }
- 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 IllegalStateException("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());
- }
- buf.append("</div>");
- }
-
- // DATA
- private StringBuilder getServerBaseUrl(HttpServletRequest request) {
- try {
- URL url = new URL(request.getRequestURL().toString());
- StringBuilder buf = new StringBuilder();
- buf.append(url.getProtocol()).append("://").append(url.getHost());
- if (url.getPort() != -1)
- buf.append(':').append(url.getPort());
- return buf;
- } catch (MalformedURLException e) {
- throw new IllegalArgumentException("Cannot extract server base URL from " + request.getRequestURL(), e);
- }
- }
-
- private String getDataUrl(Node node, HttpServletRequest request) throws RepositoryException {
- try {
- StringBuilder buf = getServerBaseUrl(request);
- buf.append(CmsJcrUtils.getDataPath(CmsConstants.EGO_REPOSITORY, node));
- return new URL(buf.toString()).toString();
- } catch (MalformedURLException e) {
- throw new IllegalArgumentException("Cannot build data URL for " + node, e);
- }
- }
-
- // public static String getDataPath(Node node) throws
- // RepositoryException {
- // assert node != null;
- // String userId = node.getSession().getUserID();
- //// if (log.isTraceEnabled())
- //// log.trace(userId + " : " + node.getPath());
- // StringBuilder buf = new StringBuilder();
- // boolean isAnonymous =
- // userId.equalsIgnoreCase(NodeConstants.ROLE_ANONYMOUS);
- // if (isAnonymous)
- // buf.append(WEBDAV_PUBLIC);
- // else
- // buf.append(WEBDAV_PRIVATE);
- // Session session = node.getSession();
- // Repository repository = session.getRepository();
- // String cn;
- // if (repository.isSingleValueDescriptor(NodeConstants.CN)) {
- // cn = repository.getDescriptor(NodeConstants.CN);
- // } else {
- //// log.warn("No cn defined in repository, using " +
- // NodeConstants.NODE);
- // cn = NodeConstants.NODE;
- // }
- // return
- // buf.append('/').append(cn).append('/').append(session.getWorkspace().getName()).append(node.getPath())
- // .toString();
- // }
-
- private String getCanonicalUrl(Node node, HttpServletRequest request) throws RepositoryException {
- try {
- StringBuilder buf = getServerBaseUrl(request);
- buf.append('/').append('!').append(node.getPath());
- return new URL(buf.toString()).toString();
- } catch (MalformedURLException e) {
- throw new IllegalArgumentException("Cannot build data URL for " + node, e);
- }
- // return request.getRequestURL().append('!').append(node.getPath())
- // .toString();
- }
-
- private Subject anonymousLogin() {
- Subject subject = new Subject();
- LoginContext lc;
- try {
- lc = new LoginContext(CmsAuth.LOGIN_CONTEXT_ANONYMOUS, subject);
- lc.login();
- return subject;
- } catch (LoginException e) {
- throw new IllegalStateException("Cannot login as anonymous", e);
- }
- }
-
-}
projects / lgpl / argeo-commons.git / blobdiff