1 /*
2 * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.nio.fs;
27
28 import java.nio.file.*;
29 import java.io.IOException;
30 import java.security.AccessController;
31 import java.security.PrivilegedAction;
32
33 /**
34 * File type detector that does lookup of file extension using Windows Registry.
35 */
36
37 public class RegistryFileTypeDetector
38 extends AbstractFileTypeDetector
39 {
40 public RegistryFileTypeDetector() {
41 super();
42 }
43
44 @Override
45 public String implProbeContentType(Path file) throws IOException {
46 if (!(file instanceof Path))
47 return null;
48
49 // get file extension
50 Path name = file.getFileName();
51 if (name == null)
53 String filename = name.toString();
54 int dot = filename.lastIndexOf('.');
55 if ((dot < 0) || (dot == (filename.length()-1)))
56 return null;
57
58 // query HKEY_CLASSES_ROOT\<ext>
59 String key = filename.substring(dot);
60 NativeBuffer keyBuffer = WindowsNativeDispatcher.asNativeBuffer(key);
61 NativeBuffer nameBuffer = WindowsNativeDispatcher.asNativeBuffer("Content Type");
62 try {
63 return queryStringValue(keyBuffer.address(), nameBuffer.address());
64 } finally {
65 nameBuffer.release();
66 keyBuffer.release();
67 }
68 }
69
70 private static native String queryStringValue(long subKey, long name);
71
72 static {
73 AccessController.doPrivileged(new PrivilegedAction<Void>() {
74 @Override
75 public Void run() {
76 // nio.dll has dependency on net.dll
77 System.loadLibrary("net");
78 System.loadLibrary("nio");
79 return null;
80 }});
81 }
82 }
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1 /*
2 * Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.nio.fs;
27
28 import java.nio.file.*;
29 import java.io.IOException;
30
31 /**
32 * File type detector that does lookup of file extension using Windows Registry.
33 */
34
35 public class RegistryFileTypeDetector
36 extends AbstractFileTypeDetector
37 {
38 public RegistryFileTypeDetector() {
39 super();
40 }
41
42 @Override
43 public String implProbeContentType(Path file) throws IOException {
44 if (!(file instanceof Path))
45 return null;
46
47 // get file extension
48 Path name = file.getFileName();
49 if (name == null)
51 String filename = name.toString();
52 int dot = filename.lastIndexOf('.');
53 if ((dot < 0) || (dot == (filename.length()-1)))
54 return null;
55
56 // query HKEY_CLASSES_ROOT\<ext>
57 String key = filename.substring(dot);
58 NativeBuffer keyBuffer = WindowsNativeDispatcher.asNativeBuffer(key);
59 NativeBuffer nameBuffer = WindowsNativeDispatcher.asNativeBuffer("Content Type");
60 try {
61 return queryStringValue(keyBuffer.address(), nameBuffer.address());
62 } finally {
63 nameBuffer.release();
64 keyBuffer.release();
65 }
66 }
67
68 private static native String queryStringValue(long subKey, long name);
69
70 static {
71 // nio.dll has dependency on net.dll
72 jdk.internal.loader.BootLoader.loadLibrary("net");
73 jdk.internal.loader.BootLoader.loadLibrary("nio");
74 }
75 }
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