1 /** 2 * This file Copyright (c) 2019 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.dam.app.action; 35 36 import info.magnolia.dam.api.Asset; 37 import info.magnolia.ui.api.action.AbstractAction; 38 import info.magnolia.ui.ValueContext; 39 import info.magnolia.ui.vaadin.server.DownloadStreamResource; 40 41 import javax.inject.Inject; 42 43 import com.vaadin.server.Page; 44 45 /** 46 * Action which downloads asset. 47 */ 48 public class DownloadAssetAction extends AbstractAction<DownloadAssetActionDefinition> { 49 50 private final ValueContext<Asset> valueContext; 51 52 @Inject 53 public DownloadAssetAction(DownloadAssetActionDefinition definition, ValueContext<Asset> valueContext) { 54 super(definition); 55 this.valueContext = valueContext; 56 } 57 58 @Override 59 public void execute() { 60 final Asset asset = valueContext.getSingleOrThrow(); 61 String fileName = asset.getFileName(); 62 DownloadStreamResource resource = new DownloadStreamResource(asset::getContentStream, fileName); 63 // Accessing the DownloadStream via getStream() will set its cacheTime to whatever is set in the parent 64 // StreamResource. By default it is set to 1000 * 60 * 60 * 24, thus we have to override it beforehand. 65 // A negative value or zero will disable caching of this stream. 66 resource.setCacheTime(-1); 67 resource.getStream().setParameter("Content-Disposition", String.format("attachment; filename=\"%s\"", fileName)); 68 resource.setMIMEType(asset.getMimeType()); 69 Page.getCurrent().open(resource, null, false); 70 } 71 }