1 /*
2 * Copyright (c) 2002-2014, Mairie de Paris
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice
10 * and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice
13 * and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * 3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 * License 1.0
33 */
34 package fr.paris.lutece.util.file;
35
36 import fr.paris.lutece.portal.service.util.AppPropertiesService;
37
38 import org.apache.commons.lang.StringUtils;
39
40
41 /**
42 * Utility class for files
43 */
44 public final class FileUtil
45 {
46 private static final String PROPERTY_ALLOWED_IMAGES_EXTENSIONS = "portal.files.allowedImagesExtentions";
47 private static final String PROPERTY_ALLOWED_HTML_EXTENSIONS = "portal.files.allowedHtmlExtentions";
48 private static final String DEFAULT_IMAGES_EXTENSION = "gif,png,jpg,jpeg,bmp";
49 private static final String DEFAULT_HTML_EXTENSION = "html,htm,xhtml";
50 private static final String CONSTANT_POINT = ".";
51 private static final String CONSTANT_COMMA = ",";
52
53 /**
54 * Private constructor
55 */
56 private FileUtil( )
57 {
58 }
59
60 /**
61 * Check if the extension of the file is an image extension
62 * @param strImageFileName The file name to check
63 * @return True if the extension is correct, false otherwise
64 */
65 public static boolean hasImageExtension( String strImageFileName )
66 {
67 String strImagesExtentions = AppPropertiesService.getProperty( PROPERTY_ALLOWED_IMAGES_EXTENSIONS,
68 DEFAULT_IMAGES_EXTENSION );
69
70 return hasExtension( strImageFileName, strImagesExtentions );
71 }
72
73 /**
74 * Check if a file has a valid html extension
75 * @param strFileName The file name to check
76 * @return True if the file name is valid, false otherwise
77 */
78 public static boolean hasHtmlExtension( String strFileName )
79 {
80 String strImagesExtentions = AppPropertiesService.getProperty( PROPERTY_ALLOWED_HTML_EXTENSIONS,
81 DEFAULT_HTML_EXTENSION );
82
83 return hasExtension( strFileName, strImagesExtentions );
84 }
85
86 /**
87 * Check if a file name match extensions in a given list
88 * @param strFileName The file name to check
89 * @param strAllowedExtensions The comma separated list of allowed
90 * extensions
91 * @return True of the extension of the file exists in the extension list
92 */
93 private static boolean hasExtension( String strFileName, String strAllowedExtensions )
94 {
95 int nIndex = strFileName.lastIndexOf( CONSTANT_POINT );
96
97 if ( ( nIndex >= 0 ) && ( strFileName.length( ) > ( nIndex + 2 ) ) )
98 {
99 String strExtension = strFileName.substring( nIndex + 1 );
100
101 if ( StringUtils.isNotEmpty( strExtension ) )
102 {
103 for ( String strAllowedExtention : strAllowedExtensions.split( CONSTANT_COMMA ) )
104 {
105 if ( StringUtils.equalsIgnoreCase( strExtension, strAllowedExtention ) )
106 {
107 return true;
108 }
109 }
110 }
111 }
112
113 return false;
114 }
115 }