/**
* Copyright © 2014 Instituto Superior Técnico
*
* This file is part of FenixEdu CMS.
*
* FenixEdu CMS is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* FenixEdu CMS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FenixEdu CMS. If not, see <http://www.gnu.org/licenses/>.
*/
package org.fenixedu.cms.routing;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.Locale;
import java.util.Optional;
import javax.activation.MimetypesFileTypeMap;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.stream.XMLStreamException;
import org.fenixedu.bennu.core.groups.DynamicGroup;
import org.fenixedu.bennu.core.security.Authenticate;
import org.fenixedu.bennu.core.util.CoreConfiguration;
import org.fenixedu.bennu.portal.domain.MenuFunctionality;
import org.fenixedu.bennu.portal.servlet.SemanticURLHandler;
import org.fenixedu.cms.domain.CMSTheme;
import org.fenixedu.cms.domain.CMSThemeFile;
import org.fenixedu.cms.domain.Category;
import org.fenixedu.cms.domain.Site;
import org.fenixedu.cms.rendering.CMSExtensions;
import org.fenixedu.cms.rss.RSSService;
import org.fenixedu.commons.i18n.I18N;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Strings;
import com.mitchellbosecke.pebble.PebbleEngine;
import com.mitchellbosecke.pebble.error.PebbleException;
import com.mitchellbosecke.pebble.loader.StringLoader;
import com.mitchellbosecke.pebble.template.PebbleTemplate;
public final class CMSURLHandler implements SemanticURLHandler {
private static final Logger logger = LoggerFactory.getLogger(CMSURLHandler.class);
private final DateTimeFormatter formatter = DateTimeFormat.forPattern("E, d MMM yyyy HH:mm:ss z");
private CMSRenderer renderer = new CMSRenderer();
public static String rewritePageUrl(HttpServletRequest request) {
String requestURL = request.getRequestURL().toString();
String queryString = request.getQueryString();
if (requestURL.endsWith("/")) {
requestURL = requestURL.substring(0, requestURL.length() - 1);
}
return queryString == null ? requestURL : requestURL + "?" + queryString;
}
@Override
public void handleRequest(MenuFunctionality menu, final HttpServletRequest req, HttpServletResponse res, FilterChain fc)
throws IOException, ServletException {
String pageSlug = req.getRequestURI().substring(req.getContextPath().length());
Site site = getSite(menu, pageSlug);
if (site == null) {
res.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
res.setCharacterEncoding(Charset.defaultCharset().name());
handleRequest(site, req, res, pageSlug);
}
public void handleRequest(Site site, HttpServletRequest req, HttpServletResponse res, String pageSlug) throws IOException,
ServletException {
if (site.getCanViewGroup().isMember(Authenticate.getUser()) || DynamicGroup.get("managers").isMember(Authenticate.getUser())) {
if (site.getPublished()) {
try {
String baseUrl = "/" + site.getBaseUrl();
if (pageSlug.startsWith(baseUrl)) {
pageSlug = pageSlug.substring(baseUrl.length());
}
if (pageSlug.endsWith("/") && !req.getRequestURI().equals(req.getContextPath() + "/")) {
handleLeadingSlash(req, res, site);
} else if (pageSlug.startsWith("/static/")) {
handleStaticResource(req, res, site, pageSlug);
} else if (pageSlug.startsWith("/rss")) {
handleRSS(req, res, site, pageSlug);
} else {
renderer.renderCMSPage(req, res, site, pageSlug);
}
} catch (Exception e) {
logger.error("Exception while rendering CMS page " + req.getRequestURI(), e);
if (res.isCommitted()) {
return;
}
res.reset();
res.resetBuffer();
renderer.errorPage(req, res, site, 500);
}
} else {
if (Authenticate.isLogged()) {
renderer.errorPage(req, res, site, 403);
} else {
renderer.errorPage(req, res, site, 401);
}
return;
}
} else {
if (Authenticate.isLogged()) {
renderer.errorPage(req, res, site, 403);
} else {
renderer.errorPage(req, res, site, 401);
}
return;
}
}
public void invalidateEntry(String key) {
renderer.invalidateEntry(key);
}
private void handleRSS(HttpServletRequest req, HttpServletResponse res, Site site, String slug) throws IOException,
XMLStreamException, ServletException {
slug = slug.replaceFirst("/", "");
Locale locale =
Strings.isNullOrEmpty(req.getParameter("locale")) ? I18N.getLocale() : new Locale.Builder().setLanguageTag(
req.getParameter("locale")).build();
String[] parts = slug.split("/");
if (parts.length == 1) {
res.setContentType("application/rss+xml;charset=UTF-8");
res.getOutputStream().write(RSSService.generateRSSForSite(site, locale).getBytes(StandardCharsets.UTF_8));
} else {
Category category = site.categoryForSlug(parts[1]);
if (category == null) {
renderer.errorPage(req, res, site, 404);
} else {
res.setContentType("application/rss+xml;charset=UTF-8");
res.getOutputStream().write(RSSService.generateRSSForCategory(category, locale).getBytes(StandardCharsets.UTF_8));
}
}
}
private Site getSite(MenuFunctionality menu, String url) {
if (menu.getSites() != null) {
return menu.getSites();
}
return Optional.ofNullable(menu.getCmsFolder()).map((x) -> {
return x.resolveSite(url);
}).orElse(null);
}
private void handleStaticResource(final HttpServletRequest req, HttpServletResponse res, Site sites, String pageSlug)
throws IOException, ServletException {
pageSlug = pageSlug.replaceFirst("/", "");
CMSTheme theme = sites.getTheme();
if (theme != null) {
byte[] bytes = theme.contentForPath(pageSlug);
if (bytes != null) {
CMSThemeFile templateFile = theme.fileForPath(pageSlug);
String etag =
"W/\"" + bytes.length + "-" + (templateFile == null ? "na" : templateFile.getLastModified().getMillis())
+ "\"";
res.setHeader("ETag", etag);
if (etag.equals(req.getHeader("If-None-Match"))) {
res.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
return;
}
res.setHeader("Expires", formatter.print(DateTime.now().plusHours(12)));
res.setHeader("Cache-Control", "max-age=43200");
res.setContentLength(bytes.length);
if (templateFile != null) {
res.setContentType(templateFile.getContentType());
} else {
res.setContentType(new MimetypesFileTypeMap().getContentType(pageSlug));
}
res.getOutputStream().write(bytes);
return;
}
}
res.sendError(404);
}
private void handleLeadingSlash(final HttpServletRequest req, HttpServletResponse res, Site sites) throws PebbleException,
IOException, ServletException {
if (req.getMethod().equals("GET")) {
res.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
res.setHeader("Location", rewritePageUrl(req));
return;
} else if (req.getMethod().equals("POST")) {
if (CoreConfiguration.getConfiguration().developmentMode()) {
PebbleEngine engine = new PebbleEngine(new StringLoader());
engine.addExtension(new CMSExtensions());
PebbleTemplate compiledTemplate =
engine.getTemplate("<html><head></head><body><h1>POST action with backslash</h1><b>You posting data with a URL with a backslash. Alter the form to post with the same URL without the backslash</body></html>");
res.setStatus(500);
res.setContentType("text/html");
compiledTemplate.evaluate(res.getWriter());
} else {
renderer.errorPage(req, res, sites, 500);
}
}
}
}