Java tutorial
/* * Copyright 2010 Blue Lotus Software, LLC. * Copyright 2010 John Yeary <jyeary@bluelotussoftware.com>. * Copyright 2010 Allan O'Driscoll * * Dual Licensed MIT and GPL v.2 * * The MIT License * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * * The GNU General Public License (GPL) Version 2, June 1991 * This program 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; version 2 of the License. * This program 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 this program; * if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package com.kagubuzz.servlets; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.HashMap; import java.util.Map; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.io.FilenameUtils; import org.apache.tomcat.util.http.fileupload.FileUploadException; import org.codehaus.jackson.map.ObjectMapper; import org.springframework.context.ApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; import com.kagubuzz.database.dao.CRUDDAO; import com.kagubuzz.filesystem.FileService; import com.kagubuzz.utilities.JavaFileUtilities; import com.kagubuzz.utilities.KaguImage; public class UploadServlet extends HttpServlet { private static final long serialVersionUID = 6748857432950840322L; FileService fileService; @Override public void init(ServletConfig config) throws ServletException { super.init(config); } /** * Handles the HTTP <code>POST</code> method. * * @param request * servlet request * @param response * servlet response * @throws ServletException * if a servlet-specific error occurs * @throws IOException * if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException { ApplicationContext applicationContext = WebApplicationContextUtils .getWebApplicationContext(this.getServletContext()); fileService = (FileService) applicationContext.getBean("fileService"); JavaFileUtilities fileUtils = new JavaFileUtilities(); InputStream is = null; FileOutputStream os = null; Map<String, Object> uploadResult = new HashMap<String, Object>(); ObjectMapper mapper = new ObjectMapper(); //TODO: Mske all these files write to a tmp direcotry for th euploader to be erased when the review button is pushed try { byte[] buffer = new byte[4096]; int bytesRead = 0; // Make sure image file is less than 4 megs if (bytesRead > 1024 * 1024 * 4) throw new FileUploadException(); is = request.getInputStream(); File tmpFile = File.createTempFile("image-", ".jpg"); os = new FileOutputStream(tmpFile); System.out.println("Saving to " + JavaFileUtilities.getTempFilePath()); while ((bytesRead = is.read(buffer)) != -1) os.write(buffer, 0, bytesRead); KaguImage thumbnailImage = new KaguImage(tmpFile); thumbnailImage.setWorkingDirectory(JavaFileUtilities.getTempFilePath()); thumbnailImage.resize(140, 180); File thumbnail = thumbnailImage .saveAsJPG("thumbnail-" + FilenameUtils.removeExtension(tmpFile.getName())); fileService.write(fileUtils.fileToByteArrayOutputStream(tmpFile), tmpFile.getName(), fileService.getTempFilePath()); fileService.write(fileUtils.fileToByteArrayOutputStream(thumbnail), thumbnail.getName(), fileService.getTempFilePath()); response.setStatus(HttpServletResponse.SC_OK); uploadResult.put("success", "true"); uploadResult.put("indexedfilename", fileService.getTempDirectoryURL() + tmpFile.getName()); uploadResult.put("thumbnailfilename", fileService.getTempDirectoryURL() + thumbnail.getName()); } catch (FileNotFoundException ex) { response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); uploadResult.put("success", "false"); log(UploadServlet.class.getName() + "has thrown an exception: " + ex.getMessage()); } catch (IOException ex) { response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); uploadResult.put("success", "false"); log(UploadServlet.class.getName() + "has thrown an exception: " + ex.getMessage()); } catch (FileUploadException e) { response.setStatus(HttpServletResponse.SC_OK); uploadResult.put("success", "false"); uploadResult.put("indexedfilename", "filetobig"); } finally { try { mapper.writeValue(response.getWriter(), uploadResult); os.close(); is.close(); } catch (IOException ignored) { } } } }