org.mycore.frontend.servlets.MCRContentServlet Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* MyCoRe 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MyCoRe. If not, see .
*/
package org.mycore.frontend.servlets;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.file.NoSuchFileException;
import java.util.Locale;
import java.util.Objects;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.util.Supplier;
import org.mycore.common.content.MCRContent;
import org.mycore.common.content.util.MCRServletContentHelper;
/**
* @author Thomas Scheffler (yagee)
*
*/
public abstract class MCRContentServlet extends MCRServlet {
private static final long serialVersionUID = 1L;
private static Logger LOGGER = LogManager.getLogger(MCRContentServlet.class);
private MCRServletContentHelper.Config config;
/**
* Returns MCRContent matching current request.
*/
public abstract MCRContent getContent(HttpServletRequest req, HttpServletResponse resp) throws IOException;
@Override
public void init() throws ServletException {
super.init();
this.config = MCRServletContentHelper.buildConfig(getServletConfig());
}
/**
* Handles a HEAD request for the specified content.
*/
@Override
protected void doHead(final HttpServletRequest request, final HttpServletResponse response) throws IOException,
ServletException {
request.setAttribute(MCRServletContentHelper.ATT_SERVE_CONTENT, Boolean.FALSE);
super.doGet(request, response);
}
@Override
protected void doOptions(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException,
IOException {
resp.setHeader("Allow", "GET, HEAD, POST, OPTIONS");
}
@Override
protected void render(final MCRServletJob job, final Exception ex) throws Exception {
if (ex != null) {
throw ex;
}
final HttpServletRequest request = job.getRequest();
final HttpServletResponse response = job.getResponse();
final MCRContent content = getContent(request, response);
boolean serveContent = MCRServletContentHelper.isServeContent(request);
try {
MCRServletContentHelper.serveContent(content, request, response, getServletContext(), getConfig(),
serveContent);
} catch (NoSuchFileException | FileNotFoundException e) {
LOGGER.info("Catched {}:", e.getClass().getSimpleName(), e);
response.sendError(HttpServletResponse.SC_NOT_FOUND, e.getMessage());
return;
}
final Supplier