org.mycore.frontend.servlets.MCRDerivateContentTransformerServlet 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.IOException;
import java.nio.file.Files;
import java.nio.file.attribute.FileTime;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.transform.TransformerException;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.mycore.common.content.MCRContent;
import org.mycore.common.content.MCRPathContent;
import org.mycore.datamodel.niofs.MCRPath;
import org.mycore.frontend.MCRFrontendUtil;
import org.xml.sax.SAXException;
/**
* This servlet transforms and delivers xml content from a derivate.
* usage: servlet/derivate_id/path/to/file.xml
*
* @author mcrshofm
*/
public class MCRDerivateContentTransformerServlet extends MCRContentServlet {
private static final int CACHE_TIME = 24 * 60 * 60;
private static final Logger LOGGER = LogManager.getLogger(MCRDerivateContentTransformerServlet.class);
@Override
public MCRContent getContent(HttpServletRequest req, HttpServletResponse resp) throws IOException {
String pathInfo = req.getPathInfo();
if (pathInfo.startsWith("/")) {
pathInfo = pathInfo.substring(1);
}
String[] pathTokens = pathInfo.split("/");
String derivate = pathTokens[0];
String path = pathInfo.substring(derivate.length());
LOGGER.debug("Derivate : {}", derivate);
LOGGER.debug("Path : {}", path);
MCRPath mcrPath = MCRPath.getPath(derivate, path);
MCRContent pc = new MCRPathContent(mcrPath);
FileTime lastModifiedTime = Files.getLastModifiedTime(mcrPath);
MCRFrontendUtil.writeCacheHeaders(resp, CACHE_TIME, lastModifiedTime.toMillis(), true);
try {
return getLayoutService().getTransformedContent(req, resp, pc);
} catch (TransformerException | SAXException e) {
throw new IOException("could not transform content", e);
}
}
}