Java tutorial
/* * #%L * Alfresco Repository WAR Community * %% * Copyright (C) 2005 - 2016 Alfresco Software Limited * %% * This file is part of the Alfresco software. * If the software was purchased under a paid Alfresco license, the terms of * the paid license agreement will prevail. Otherwise, the software is * provided under the following open source license terms: * * Alfresco is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Alfresco 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with Alfresco. If not, see <http://www.gnu.org/licenses/>. * #L% */ package org.alfresco.web.bean.ajax; import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.io.Serializable; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.StringTokenizer; import javax.faces.context.ExternalContext; import javax.faces.context.FacesContext; import javax.faces.context.ResponseWriter; import javax.servlet.http.HttpServletRequest; import org.alfresco.model.ContentModel; import org.alfresco.repo.content.MimetypeMap; import org.alfresco.repo.content.filestore.FileContentReader; import org.alfresco.service.ServiceRegistry; import org.alfresco.service.cmr.model.FileInfo; import org.alfresco.service.cmr.repository.ContentReader; import org.alfresco.service.cmr.repository.ContentWriter; import org.alfresco.service.cmr.repository.NodeRef; import org.alfresco.service.cmr.repository.datatype.DefaultTypeConverter; import org.alfresco.service.namespace.QName; import org.alfresco.util.TempFileProvider; import org.springframework.extensions.surf.util.URLDecoder; import org.alfresco.web.app.servlet.BaseServlet; import org.alfresco.web.app.servlet.ajax.InvokeCommand; import org.alfresco.web.bean.repository.Repository; import org.alfresco.util.XMLUtil; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.io.FilenameUtils; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; /** * Bean managing the ajax servlet upload of a multi-part form containing file content * to be added at a specific path in the server. * * @author Kevin Roast */ public class FileUploadBean implements Serializable { private static final long serialVersionUID = 4555828718375916674L; private static Log logger = LogFactory.getLog(FileUploadBean.class); /** * Ajax method to upload file content. A multi-part form is required as the input. * * "return-page" = javascript to execute on return from the upload request * "currentPath" = the cm:name based server path to upload the content into * and the file item content. * * @throws Exception */ @InvokeCommand.ResponseMimetype(value = MimetypeMap.MIMETYPE_HTML) public void uploadFile() throws Exception { FacesContext fc = FacesContext.getCurrentInstance(); ExternalContext externalContext = fc.getExternalContext(); HttpServletRequest request = (HttpServletRequest) externalContext.getRequest(); ServletFileUpload upload = new ServletFileUpload(new DiskFileItemFactory()); upload.setHeaderEncoding("UTF-8"); List<FileItem> fileItems = upload.parseRequest(request); FileUploadBean bean = new FileUploadBean(); String currentPath = null; String filename = null; String returnPage = null; File file = null; for (FileItem item : fileItems) { if (item.isFormField() && item.getFieldName().equals("return-page")) { returnPage = item.getString(); } else if (item.isFormField() && item.getFieldName().equals("currentPath")) { currentPath = URLDecoder.decode(item.getString()); } else { filename = FilenameUtils.getName(item.getName()); file = TempFileProvider.createTempFile("alfresco", ".upload"); item.write(file); } } if (logger.isDebugEnabled()) logger.debug("Ajax file upload request: " + filename + " to path: " + currentPath + " return page: " + returnPage); try { if (file != null && currentPath != null && currentPath.length() != 0) { NodeRef containerRef = pathToNodeRef(fc, currentPath); if (containerRef != null) { // Guess the mimetype String mimetype = Repository.getMimeTypeForFileName(fc, filename); // Now guess the encoding String encoding = "UTF-8"; InputStream is = null; try { is = new BufferedInputStream(new FileInputStream(file)); encoding = Repository.guessEncoding(fc, is, mimetype); } catch (Throwable e) { // Bad as it is, it's not terminal logger.error("Failed to guess character encoding of file: " + file, e); } finally { if (is != null) { try { is.close(); } catch (Throwable e) { } } } // Try and extract metadata from the file ContentReader cr = new FileContentReader(file); cr.setMimetype(mimetype); // create properties for content type String author = null; String title = null; String description = null; Map<QName, Serializable> contentProps = new HashMap<QName, Serializable>(5, 1.0f); if (Repository.extractMetadata(fc, cr, contentProps)) { author = (String) (contentProps.get(ContentModel.PROP_AUTHOR)); title = DefaultTypeConverter.INSTANCE.convert(String.class, contentProps.get(ContentModel.PROP_TITLE)); description = DefaultTypeConverter.INSTANCE.convert(String.class, contentProps.get(ContentModel.PROP_DESCRIPTION)); } // default the title to the file name if not set if (title == null) { title = filename; } ServiceRegistry services = Repository.getServiceRegistry(fc); FileInfo fileInfo = services.getFileFolderService().create(containerRef, filename, ContentModel.TYPE_CONTENT); NodeRef fileNodeRef = fileInfo.getNodeRef(); // set the author aspect if (author != null) { Map<QName, Serializable> authorProps = new HashMap<QName, Serializable>(1, 1.0f); authorProps.put(ContentModel.PROP_AUTHOR, author); services.getNodeService().addAspect(fileNodeRef, ContentModel.ASPECT_AUTHOR, authorProps); } // apply the titled aspect - title and description Map<QName, Serializable> titledProps = new HashMap<QName, Serializable>(2, 1.0f); titledProps.put(ContentModel.PROP_TITLE, title); titledProps.put(ContentModel.PROP_DESCRIPTION, description); services.getNodeService().addAspect(fileNodeRef, ContentModel.ASPECT_TITLED, titledProps); // get a writer for the content and put the file ContentWriter writer = services.getContentService().getWriter(fileNodeRef, ContentModel.PROP_CONTENT, true); writer.setMimetype(mimetype); writer.setEncoding(encoding); writer.putContent(file); } } } catch (Exception e) { returnPage = returnPage.replace("${UPLOAD_ERROR}", e.getMessage()); } finally { if (file != null) { logger.debug("delete temporary file:" + file.getPath()); // Delete the temporary file file.delete(); } } Document result = XMLUtil.newDocument(); Element htmlEl = result.createElement("html"); result.appendChild(htmlEl); Element bodyEl = result.createElement("body"); htmlEl.appendChild(bodyEl); Element scriptEl = result.createElement("script"); bodyEl.appendChild(scriptEl); scriptEl.setAttribute("type", "text/javascript"); Node scriptText = result.createTextNode(returnPage); scriptEl.appendChild(scriptText); if (logger.isDebugEnabled()) { logger.debug("File upload request complete."); } ResponseWriter out = fc.getResponseWriter(); XMLUtil.print(result, out); } static NodeRef pathToNodeRef(FacesContext fc, String path) { // convert cm:name based path to a NodeRef StringTokenizer t = new StringTokenizer(path, "/"); int tokenCount = t.countTokens(); String[] elements = new String[tokenCount]; for (int i = 0; i < tokenCount; i++) { elements[i] = t.nextToken(); } return BaseServlet.resolveWebDAVPath(fc, elements, false); } }