org.mycore.frontend.fileupload.MCRUploadServletDeployer 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.fileupload;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.NotDirectoryException;
import java.nio.file.Path;
import java.nio.file.Paths;
import javax.servlet.MultipartConfigElement;
import javax.servlet.ServletContext;
import javax.servlet.ServletRegistration.Dynamic;
import org.apache.logging.log4j.LogManager;
import org.mycore.common.config.MCRConfiguration2;
import org.mycore.common.config.MCRConfigurationException;
import org.mycore.common.events.MCRStartupHandler.AutoExecutable;
/**
* Uses mycore.properties
to configure {@link MCRUploadViaFormServlet}.
* @author Thomas Scheffler (yagee)
*
*/
public class MCRUploadServletDeployer implements AutoExecutable {
private static final String MCR_FILE_UPLOAD_TEMP_STORAGE_PATH = "MCR.FileUpload.TempStoragePath";
/* (non-Javadoc)
* @see org.mycore.common.events.MCRStartupHandler.AutoExecutable#getName()
*/
@Override
public String getName() {
return MCRUploadViaFormServlet.class.getSimpleName() + " Deployer";
}
/* (non-Javadoc)
* @see org.mycore.common.events.MCRStartupHandler.AutoExecutable#getPriority()
*/
@Override
public int getPriority() {
return 0;
}
/* (non-Javadoc)
* @see org.mycore.common.events.MCRStartupHandler.AutoExecutable#startUp(javax.servlet.ServletContext)
*/
@Override
public void startUp(ServletContext servletContext) {
if (servletContext != null) {
String servletName = "MCRUploadViaFormServlet";
MultipartConfigElement multipartConfig = getMultipartConfig();
try {
checkTempStoragePath(multipartConfig.getLocation());
} catch (IOException e) {
throw new MCRConfigurationException("Could not setup " + servletName + "!", e);
}
Dynamic uploadServlet = servletContext.addServlet(servletName, MCRUploadViaFormServlet.class);
uploadServlet.addMapping("/servlets/MCRUploadViaFormServlet");
uploadServlet.setMultipartConfig(multipartConfig);
}
}
private void checkTempStoragePath(String location) throws IOException {
Path targetDir = Paths.get(location);
if (!targetDir.isAbsolute()) {
throw new MCRConfigurationException(
"'" + MCR_FILE_UPLOAD_TEMP_STORAGE_PATH + "=" + location + "' must be an absolute path!");
}
if (Files.notExists(targetDir)) {
LogManager.getLogger().info("Creating directory: {}", targetDir);
Files.createDirectories(targetDir);
}
if (!Files.isDirectory(targetDir)) {
throw new NotDirectoryException(targetDir.toString());
}
}
private MultipartConfigElement getMultipartConfig() {
String location = MCRConfiguration2.getStringOrThrow(MCR_FILE_UPLOAD_TEMP_STORAGE_PATH);
long maxFileSize = MCRConfiguration2.getLong("MCR.FileUpload.MaxSize").orElse(5000000L);
int fileSizeThreshold = MCRConfiguration2.getInt("MCR.FileUpload.MemoryThreshold").orElse(1000000);
LogManager.getLogger()
.info(() -> MCRUploadViaFormServlet.class.getSimpleName() + " accept files and requests up to "
+ maxFileSize + " bytes and uses " + location + " as tempory storage for files larger "
+ fileSizeThreshold + " bytes.");
return new MultipartConfigElement(location, maxFileSize, maxFileSize,
fileSizeThreshold);
}
}