001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.upload;
016    
017    import com.liferay.portal.kernel.util.FileUtil;
018    import com.liferay.portal.kernel.util.GetterUtil;
019    import com.liferay.portal.kernel.util.StringPool;
020    import com.liferay.portal.util.PropsUtil;
021    
022    import java.io.File;
023    
024    import org.apache.commons.fileupload.disk.DiskFileItem;
025    
026    /**
027     * @author Brian Wing Shun Chan
028     * @author Zongliang Li
029     * @author Harry Mark
030     */
031    public class LiferayFileItem extends DiskFileItem {
032    
033            public static final int THRESHOLD_SIZE = GetterUtil.getInteger(
034                    PropsUtil.get(LiferayFileItem.class.getName() + ".threshold.size"));
035    
036            public LiferayFileItem(
037                    String fieldName, String contentType, boolean isFormField,
038                    String fileName, int sizeThreshold, File repository) {
039    
040                    super(
041                            fieldName, contentType, isFormField, fileName, sizeThreshold,
042                            repository);
043    
044                    _fileName = fileName;
045                    _repository = repository;
046            }
047    
048            public String getFileName() {
049                    if (_fileName == null) {
050                            return null;
051                    }
052    
053                    int pos = _fileName.lastIndexOf("/");
054    
055                    if (pos == -1) {
056                            pos = _fileName.lastIndexOf("\\");
057                    }
058    
059                    if (pos == -1) {
060                            return _fileName;
061                    }
062                    else {
063                            return _fileName.substring(pos + 1, _fileName.length());
064                    }
065            }
066    
067            public String getFullFileName() {
068                    return _fileName;
069            }
070    
071            public String getFileNameExtension() {
072                    return FileUtil.getExtension(_fileName);
073            }
074    
075            public String getString() {
076    
077                    // Prevent serialization of uploaded content
078    
079                    if (getSize() > THRESHOLD_SIZE) {
080                            return StringPool.BLANK;
081                    }
082    
083                    if (_encodedString == null) {
084                            return super.getString();
085                    }
086                    else {
087                            return _encodedString;
088                    }
089            }
090    
091            public void setString(String encode) {
092                    try {
093                            _encodedString = getString(encode);
094                    }
095                    catch (Exception e) {
096                    }
097            }
098    
099            protected File getTempFile() {
100                    String tempFileName = "upload_" + _getUniqueId();
101    
102                    String extension = getFileNameExtension();
103    
104                    if (extension != null) {
105                            tempFileName += "." + extension;
106                    }
107    
108                    File tempFile = new File(_repository, tempFileName);
109    
110                    tempFile.deleteOnExit();
111    
112                    return tempFile;
113            }
114    
115            private static String _getUniqueId() {
116                    int current;
117    
118                    synchronized (LiferayFileItem.class) {
119                            current = _counter++;
120                    }
121    
122                    String id = String.valueOf(current);
123    
124                    if (current < 100000000) {
125                            id = ("00000000" + id).substring(id.length());
126                    }
127    
128                    return id;
129            }
130    
131            private static int _counter = 0;
132    
133            private String _fileName;
134            private File _repository;
135            private String _encodedString;
136    
137    }