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jforum example source code file (AttachmentCommon.java)

This example jforum source code file (AttachmentCommon.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jforum tags/keywords

arraylist, attachment, attachment, awt, file, image, io, iterator, list, map, quotalimit, quotalimit, string, string, stringbuffer, stringbuffer, uploadutils, util

The jforum AttachmentCommon.java source code

/*
 * Copyright (c) JForum Team
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 * 
 * 1) Redistributions of source code must retain the above 
 * copyright notice, this list of conditions and the 
 * following  disclaimer.
 * 2)  Redistributions in binary form must reproduce the 
 * above copyright notice, this list of conditions and 
 * the following disclaimer in the documentation and/or 
 * other materials provided with the distribution.
 * 3) Neither the name of "Rafael Steil" nor 
 * the names of its contributors may be used to endorse 
 * or promote products derived from this software without 
 * specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
 * IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 * 
 * Created on Jan 18, 2005 3:08:48 PM
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum.view.forum.common;

import java.awt.image.BufferedImage;
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import net.jforum.SessionFacade;
import net.jforum.context.RequestContext;
import net.jforum.dao.AttachmentDAO;
import net.jforum.dao.DataAccessDriver;
import net.jforum.entities.Attachment;
import net.jforum.entities.AttachmentExtension;
import net.jforum.entities.AttachmentInfo;
import net.jforum.entities.Group;
import net.jforum.entities.Post;
import net.jforum.entities.QuotaLimit;
import net.jforum.entities.User;
import net.jforum.exceptions.AttachmentException;
import net.jforum.exceptions.AttachmentSizeTooBigException;
import net.jforum.exceptions.BadExtensionException;
import net.jforum.repository.SecurityRepository;
import net.jforum.security.SecurityConstants;
import net.jforum.util.I18n;
import net.jforum.util.MD5;
import net.jforum.util.image.ImageUtils;
import net.jforum.util.legacy.commons.fileupload.FileItem;
import net.jforum.util.preferences.ConfigKeys;
import net.jforum.util.preferences.SystemGlobals;

import org.apache.log4j.Logger;

/**
 * @author Rafael Steil
 * @version $Id: AttachmentCommon.java,v 1.36 2007/09/20 16:07:08 rafaelsteil Exp $
 */
public class AttachmentCommon
{
	private static Logger logger = Logger.getLogger(AttachmentCommon.class);
	private static final String DENY_ALL = "*";
	
	private RequestContext request;
	private AttachmentDAO am;
	private boolean canProceed;
	private Map filesToSave = new HashMap();
	
	public AttachmentCommon(RequestContext request, int forumId)
	{
		this.request = request;
		this.am = DataAccessDriver.getInstance().newAttachmentDAO();
		
		this.canProceed = SecurityRepository.canAccess(SecurityConstants.PERM_ATTACHMENTS_ENABLED, 
			Integer.toString(forumId));
	}
	
	public void preProcess()
	{
		if (!this.canProceed) {
			return;
		}
		
		String t = this.request.getParameter("total_files");
		
		if (t == null || "".equals(t)) {
			return;
		}
		
		int total = Integer.parseInt(t);
		
		if (total < 1) {
			return;
		}
		
		if (total > SystemGlobals.getIntValue(ConfigKeys.ATTACHMENTS_MAX_POST)) {
			total = SystemGlobals.getIntValue(ConfigKeys.ATTACHMENTS_MAX_POST);
		}

		long totalSize = 0;
		int userId = SessionFacade.getUserSession().getUserId();
		Map extensions = this.am.extensionsForSecurity();
		
		for (int i = 0; i < total; i++) {
			FileItem item = (FileItem)this.request.getObjectParameter("file_" + i);
			
			if (item == null) {
				continue;
			}

			if (item.getName().indexOf('\000') > -1) {
				logger.warn("Possible bad attachment (null char): " + item.getName()
					+ " - user_id: " + SessionFacade.getUserSession().getUserId());
				continue;
			}
			
			UploadUtils uploadUtils = new UploadUtils(item);

			// Check if the extension is allowed
			boolean containsExtension = extensions.containsKey(uploadUtils.getExtension());
			boolean denyAll = extensions.containsKey(DENY_ALL);

			boolean isAllowed = (!denyAll && !containsExtension)
				|| (containsExtension && extensions.get(uploadUtils.getExtension()).equals(Boolean.TRUE));

			if (!isAllowed) { 
				throw new BadExtensionException(I18n.getMessage("Attachments.badExtension", 
					new String[] { uploadUtils.getExtension() }));
			}

			// Check comment length:
			String comment = this.request.getParameter("comment_" + i);
			if (comment.length() > 254) {
				throw new AttachmentException("Comment too long.");
			}
			
			Attachment a = new Attachment();
			a.setUserId(userId);
			
			AttachmentInfo info = new AttachmentInfo();
			info.setFilesize(item.getSize());
			info.setComment(comment);
			info.setMimetype(item.getContentType());
			
			// Get only the filename, without the path (IE does that)
			String realName = this.stripPath(item.getName());
			
			info.setRealFilename(realName);
			info.setUploadTimeInMillis(System.currentTimeMillis());
			
			AttachmentExtension ext = this.am.selectExtension(uploadUtils.getExtension().toLowerCase());
			if (ext.isUnknown()) {
				ext.setExtension(uploadUtils.getExtension());
			}
			
			info.setExtension(ext);
			String savePath = this.makeStoreFilename(info);
			info.setPhysicalFilename(savePath);
			
			a.setInfo(info);
			filesToSave.put(uploadUtils, a);
			
			totalSize += item.getSize();
		}
		
		// Check upload limits
		QuotaLimit ql = this.getQuotaLimit(userId);
		if (ql != null) {
			if (ql.exceedsQuota(totalSize)) {
				throw new AttachmentSizeTooBigException(I18n.getMessage("Attachments.tooBig", 
					new Integer[] { new Integer(ql.getSizeInBytes() / 1024), 
						new Integer((int)totalSize / 1024) }));
			}
		}
	}

	/**
	 * @param realName String
	 * @return String
	 */
	public String stripPath(String realName)
	{
		String separator = "/";
		int index = realName.lastIndexOf(separator);
		
		if (index == -1) {
			separator = "\\";
			index = realName.lastIndexOf(separator);
		}
		
		if (index > -1) {
			realName = realName.substring(index + 1);
		}
		
		return realName;
	}
	
	public void insertAttachments(Post post)
	{
		if (!this.canProceed) {
			return;
		}
		
		post.hasAttachments(this.filesToSave.size() > 0);
		
		for (Iterator iter = this.filesToSave.entrySet().iterator(); iter.hasNext(); ) {
			Map.Entry entry = (Map.Entry)iter.next();
			Attachment a = (Attachment)entry.getValue();
			a.setPostId(post.getId());
			
			String path = SystemGlobals.getValue(ConfigKeys.ATTACHMENTS_STORE_DIR) 
				+ "/" 
				+ a.getInfo().getPhysicalFilename();
			
			this.am.addAttachment(a);
			((UploadUtils)entry.getKey()).saveUploadedFile(path);
			
			if (this.shouldCreateThumb(a)) {
				this.createSaveThumb(path);
			}
		}
	}
	
	private boolean shouldCreateThumb(Attachment a) {
		String extension = a.getInfo().getExtension().getExtension().toLowerCase();
		
		return SystemGlobals.getBoolValue(ConfigKeys.ATTACHMENTS_IMAGES_CREATE_THUMB)
			&& ("jpg".equals(extension) || "jpeg".equals(extension) 
				|| "gif".equals(extension) || "png".equals(extension));
	}
	
	private void createSaveThumb(String path) {
		try {
			BufferedImage image = ImageUtils.resizeImage(path, ImageUtils.IMAGE_JPEG, 
				SystemGlobals.getIntValue(ConfigKeys.ATTACHMENTS_IMAGES_MAX_THUMB_W),
				SystemGlobals.getIntValue(ConfigKeys.ATTACHMENTS_IMAGES_MAX_THUMB_H));
			ImageUtils.saveImage(image, path + "_thumb", ImageUtils.IMAGE_JPEG);
		}
		catch (Exception e) {
			logger.error(e.toString(), e);
		}
	}
	
	public QuotaLimit getQuotaLimit(int userId)
	{
		QuotaLimit ql = new QuotaLimit();
		User u = DataAccessDriver.getInstance().newUserDAO().selectById(userId);
		
		for (Iterator iter = u.getGroupsList().iterator(); iter.hasNext();) {
			QuotaLimit l = this.am.selectQuotaLimitByGroup(((Group)iter.next()).getId());
			if (l == null) {
				continue;
			}
			
			if (l.getSizeInBytes() > ql.getSizeInBytes()) {
				ql = l;
			}
		}
		
		if (ql.getSize() == 0) {
			return null;
		}
		
		return ql;
	}
	
	public void editAttachments(int postId, int forumId)
	{
		// Allow removing the attachments at least
		AttachmentDAO am = DataAccessDriver.getInstance().newAttachmentDAO();
		
		// Check for attachments to remove
		List deleteList = new ArrayList();
		String[] delete = null;
		String s = this.request.getParameter("delete_attach");
		
		if (s != null) {
			delete = s.split(",");
		}
		
		if (delete != null) {
			for (int i = 0; i < delete.length; i++) {
				if (delete[i] != null && !delete[i].equals("")) {
					int id = Integer.parseInt(delete[i]);
					Attachment a = am.selectAttachmentById(id);
					
					am.removeAttachment(id, postId);
					
					String filename = SystemGlobals.getValue(ConfigKeys.ATTACHMENTS_STORE_DIR)
						+ "/" + a.getInfo().getPhysicalFilename();
					
					File f = new File(filename);
					
					if (f.exists()) {
						f.delete();
					}
					
					// Check if we have a thumb to delete
					f = new File(filename + "_thumb");
					
					if (f.exists()) {
						f.delete();
					}
				}
			}
			
			deleteList = Arrays.asList(delete);
		}
		
		if (!SecurityRepository.canAccess(SecurityConstants.PERM_ATTACHMENTS_ENABLED, 
				Integer.toString(forumId))
				&& !SecurityRepository.canAccess(SecurityConstants.PERM_ATTACHMENTS_DOWNLOAD)) {
			return;
		}
		
		// Update
		String[] attachIds = null;
		s = this.request.getParameter("edit_attach_ids");
		if (s != null) {
			attachIds = s.split(",");
		}
		
		if (attachIds != null) {
			for (int i = 0; i < attachIds.length; i++) {
				if (deleteList.contains(attachIds[i]) 
						|| attachIds[i] == null || attachIds[i].equals("")) {
					continue;
				}
				
				int id = Integer.parseInt(attachIds[i]);
				Attachment a = am.selectAttachmentById(id);
				a.getInfo().setComment(this.request.getParameter("edit_comment_" + id));

				am.updateAttachment(a);
			}
		}
	}
	
	private String makeStoreFilename(AttachmentInfo a)
	{
		Calendar c = new GregorianCalendar();
		c.setTimeInMillis(System.currentTimeMillis());
		c.get(Calendar.YEAR);
		
		int year = Calendar.getInstance().get(Calendar.YEAR);
		int month = Calendar.getInstance().get(Calendar.MONTH) + 1;
		int day = Calendar.getInstance().get(Calendar.DAY_OF_MONTH);
		
		StringBuffer dir = new StringBuffer(256);
		dir.append(year).append('/').append(month).append('/').append(day).append('/');
		
		new File(SystemGlobals.getValue(ConfigKeys.ATTACHMENTS_STORE_DIR) + "/" + dir).mkdirs();
		
		return dir
			.append(MD5.crypt(a.getRealFilename() + System.currentTimeMillis()))
			.append('_')
			.append(SessionFacade.getUserSession().getUserId())
			.append('.')
			.append(a.getExtension().getExtension())
			.append('_')
			.toString();
	}
	
	public List getAttachments(int postId, int forumId)
	{
		if (!SecurityRepository.canAccess(SecurityConstants.PERM_ATTACHMENTS_DOWNLOAD)
				&& !SecurityRepository.canAccess(SecurityConstants.PERM_ATTACHMENTS_ENABLED, 
						Integer.toString(forumId))) {
			return new ArrayList();
		}
		
		return this.am.selectAttachments(postId);
	}
	
	public boolean isPhysicalDownloadMode(int extensionGroupId) 
	{
		return this.am.isPhysicalDownloadMode(extensionGroupId);
	}

	public void deleteAttachments(int postId, int forumId) 
	{
		// Attachments
		List attachments = DataAccessDriver.getInstance().newAttachmentDAO().selectAttachments(postId);
		StringBuffer attachIds = new StringBuffer();
		
		for (Iterator iter = attachments.iterator(); iter.hasNext(); ) {
			Attachment a = (Attachment)iter.next();
			attachIds.append(a.getId()).append(',');
		}
		
		this.request.addOrReplaceParameter("delete_attach", attachIds.toString());
		this.editAttachments(postId, forumId);
	}
}

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