/*
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Dateiverwaltung - File management in your browser
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Copyright (C) 2017 Ulrich Hilger, http://uhilger.de
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package de.uhilger.filecms.web;
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import de.uhilger.wbx.WbxUtils;
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import java.io.File;
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import java.io.IOException;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletContextEvent;
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import javax.servlet.ServletContextListener;
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import org.apache.commons.io.FileUtils;
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/**
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* Initialisieren der Dateiverwaltung
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*/
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/*
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der folgende Eintrag kann z.B. in $CATALINA_BASE/conf/context.xml
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eingetragen werden
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<Environment
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name="wbxFileBase"
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type="java.lang.String"
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value="/media/wbx-data/cms"
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override="false"
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/>
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*/
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public class Initialiser implements ServletContextListener {
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private static final Logger logger = Logger.getLogger(Initialiser.class.getName());
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public static final String FILE_BASE = "filebase";
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public static final String DATENABLAGE = "datenAblage";
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public static final String WBX_FILE_BASE = "wbxFileBase";
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public static final String WBX_DATA_DIR = "wbx.data";
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public static final String WBX_DEPTH = "tiefe";
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public static final String WBX_DATA_FOLDER = "datenOrdner";
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/**
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* Die Dateiablage wird entweder auf einen absoluten Pfad gesetzt,
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* der im Deployment Descriptor hinterlegt werden kann oder, wenn
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* dort nichts eingetragen ist, auf den hart kodierten Pfad
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* der WebBox.
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*
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* @param ctx der ServletContext, in den die Angabe eingetragen wird. Dort
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* ist anschliessend die Angabe unter Initialiser.FILE_BASE abrufbar
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*/
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protected void ablageErmitteln(ServletContext ctx) {
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//Object o = ctx.getInitParameter(DATENABLAGE);
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//File wbxDaten = getDataDir(ctx, 2, "data/");
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//WbxUtils wu = new WbxUtils();
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//Object o = wu.getJNDIParameter(WBX_FILE_BASE, WbxUtils.EMPTY_STRING);
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String dir = System.getProperty(WBX_DATA_DIR);
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try {
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if(dir != null) {
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//String pfad = o.toString();
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if(dir.trim().length() > 0) {
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ctx.setAttribute(FILE_BASE, dir);
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logger.log(Level.INFO, "Daten-Ordner aus wbx.data: {0}", dir);
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} else {
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ctx.setAttribute(FILE_BASE, getDefaultDataDir(ctx).getAbsolutePath());
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}
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} else {
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ctx.setAttribute(FILE_BASE, getDefaultDataDir(ctx).getAbsolutePath());
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}
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} catch(Exception ex) {
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ctx.setAttribute(FILE_BASE, getDefaultDataDir(ctx).getAbsolutePath());
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}
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}
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private File getDefaultDataDir(ServletContext ctx) {
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String tiefe = ctx.getInitParameter(WBX_DEPTH);
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String ordnerName = ctx.getInitParameter(WBX_DATA_FOLDER);
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return getDataDir(ctx, Integer.parseInt(tiefe), ordnerName);
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}
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/**
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* Daten-Ordner relativ zum Ablageort des file-cms finden.
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*
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* Die Standard-Struktur einer WebBox sieht folgende Ordner vor
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*
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* wbx/apps
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* wbx/data
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*
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* Liegt das file-cms z.B. im Ordner /home/ulrich/dev/srv/wbx-3/apps/file-cms
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* kann von dort aus der Daten-Ordner mit
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* getDataDir(ctx, 2, "data/")
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* gefunden werden.
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*
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* @param ctx der ServletContext, in dem das file-cms laeuft
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* @param tiefe Anzahl Ordner, die der Ablageort des file-cms vom
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* Eltern-Ordner entfernt ist
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* @param pfad der Pfad zum Daten-Ordner ausgehend vom Eltern-Ordner
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* @return Daten-Ordner
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*/
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private File getDataDir(ServletContext ctx, int tiefe, String pfad) {
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File appsOrdner = new File(ctx.getRealPath("/"));
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logger.log(Level.INFO, "Apps-Ordner: {0}", appsOrdner.getAbsolutePath());
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File wbx = new File(appsOrdner, "");
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for(int i = 0; i < tiefe; i++) {
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wbx = wbx.getParentFile();
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}
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logger.log(Level.INFO, "Wbx-Ordner: {0}", wbx.getAbsolutePath());
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File daten = new File(wbx, pfad);
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logger.log(Level.INFO, "Daten-Ordner: {0}", daten.getAbsolutePath());
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return daten;
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}
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protected void ablageInitialisieren(ServletContext ctx) {
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Object o = ctx.getAttribute(FILE_BASE);
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if(o instanceof String) {
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String targetDirName = (String) o;
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File dataDir = new File(targetDirName, "www");
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if(!dataDir.exists()) {
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dataDir.mkdirs();
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String srcPath = ctx.getRealPath("/"); // file-cms in webapps
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File srcDir = new File(srcPath, "/META-INF/daten/www");
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dataDir = new File(targetDirName);
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try {
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FileUtils.copyDirectoryToDirectory(srcDir, dataDir);
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srcDir = new File(srcPath, "/META-INF/daten/home");
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FileUtils.copyDirectoryToDirectory(srcDir, dataDir);
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srcDir = new File(srcPath, "/META-INF/daten/dav");
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FileUtils.copyDirectoryToDirectory(srcDir, dataDir);
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} catch (IOException ex) {
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logger.log(Level.SEVERE, null, ex);
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}
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}
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}
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}
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@Override
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public void contextInitialized(ServletContextEvent sce) {
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ServletContext ctx = sce.getServletContext();
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ablageErmitteln(ctx);
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ablageInitialisieren(ctx);
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}
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@Override
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public void contextDestroyed(ServletContextEvent sce) {
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ServletContext ctx = sce.getServletContext();
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ctx.removeAttribute(FILE_BASE);
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}
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}
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