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Kernel for Resin Java Application Server
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/*
* Copyright (c) 1998-2012 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.vfs;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.lang.reflect.Method;
import java.nio.channels.FileChannel;
import java.nio.file.OpenOption;
import java.security.AccessControlException;
import java.util.Locale;
import java.util.Map;
import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.caucho.db.io.RandomAccessStreamNio;
import com.caucho.server.util.CauchoSystem;
import com.caucho.util.CharBuffer;
/**
* FilePath implements the native filesystem.
*/
public class FilePath extends FilesystemPath {
private static Logger log = Logger.getLogger(FilePath.class.getName());
// The underlying Java File object.
private static byte []NEWLINE = getNewlineString().getBytes();
private static FilesystemPath PWD;
private static Method _isSymlink;
private static Method _toPath;
private static Method _fileChannelOpen;
private File _file;
protected boolean _isWindows;
/**
* @param path canonical path
*/
protected FilePath(FilesystemPath root, String userPath, String path)
{
super(root, userPath, path);
_separatorChar = getFileSeparatorChar();
_isWindows = _separatorChar == '\\';
}
public FilePath(String path)
{
this(null, //PWD != null ? PWD._root : null,
path, normalizePath("/", initialPath(path),
0, getFileSeparatorChar()));
if (_root == null) {
_root = new FilePath(null, "/", "/");
_root._root = _root;
if (PWD == null)
PWD = _root;
}
_separatorChar = _root._separatorChar;
_isWindows = ((FilePath) _root)._isWindows;
}
protected static String initialPath(String path)
{
if (path == null)
return getPwd();
else if (path.length() > 0 && path.charAt(0) == '/')
return path;
else if (path.length() > 1 && path.charAt(1) == ':' && isWindows()) {
char ch = Character.toLowerCase(path.charAt(0));
//return convertFromWindowsPath(path);
return "/" + ch + ":" + path.substring(2);
}
else {
String dir = getPwd();
if (dir.length() > 0 && dir.charAt(dir.length() - 1) == '/')
return dir + path;
else
return dir + "/" + path;
}
}
/**
* Gets the system's user dir (pwd) and convert it to the Resin format.
*/
public static String getPwd()
{
String path = getUserDir();
path = path.replace(getFileSeparatorChar(), '/');
if (isWindows())
path = convertFromWindowsPath(path);
return path;
}
/**
* a:xxx -> /a:xxx
* ///a:xxx -> /a:xxx
* //xxx -> /:/xxx
*
*/
private static String convertFromWindowsPath(String path)
{
int colon = path.indexOf(':');
int length = path.length();
char ch;
if (colon == 1 && (ch = path.charAt(0)) != '/' && ch != '\\') {
return "/" + ch + ":/" + path.substring(2);
}
else if (length > 1
&& ((ch = path.charAt(0)) == '/' || ch == '\\')
&& ((ch = path.charAt(1)) == '/' || ch == '\\')) {
if (colon < 0)
return "/:" + path;
for (int i = colon - 2; i > 1; i--) {
if ((ch = path.charAt(i)) != '/' && ch != '\\')
return "/:" + path;
}
ch = Character.toLowerCase(path.charAt(colon - 1));
if (ch >= 'a' && ch <= 'z') {
return "/" + ch + path.substring(colon);
}
else {
return "/:" + path;
}
}
else
return path;
}
@Override
public long getDiskSpaceFree()
{
try {
// JDK 1.6+ only
return _file.getFreeSpace();
} catch (Exception e) {
return 0;
}
}
@Override
public long getDiskSpaceTotal()
{
try {
// JDK 1.6+ only
return _file.getTotalSpace();
} catch (Exception e) {
return 0;
}
}
/**
* Lookup the path, handling windows weirdness
*/
@Override
public Path schemeWalk(String userPath,
Map attributes,
String filePath,
int offset)
{
if (! isWindows())
return super.schemeWalk(userPath, attributes, filePath, offset);
String canonicalPath;
if (filePath.length() < offset + 2)
return super.schemeWalk(userPath, attributes, filePath, offset);
char ch1 = filePath.charAt(offset + 1);
char ch2 = filePath.charAt(offset);
/*
if ((ch2 == '/' || ch2 == _separatorChar)
&& (ch1 == '/' || ch1 == _separatorChar))
return super.schemeWalk(userPath, attributes,
convertFromWindowsPath(filePath.substring(offset)), 0);
else
return super.schemeWalk(userPath, attributes, filePath, offset);
*/
return super.schemeWalk(userPath, attributes,
convertFromWindowsPath(filePath.substring(offset)), 0);
}
/**
* Lookup the actual path relative to the filesystem root.
*
* @param userPath the user's path to lookup()
* @param attributes the user's attributes to lookup()
* @param path the normalized path
*
* @return the selected path
*/
public Path fsWalk(String userPath,
Map attributes,
String path)
{
return new FilePath(_root, userPath, path);
}
/**
* Returns true if the path itself is cacheable
*/
@Override
protected boolean isPathCacheable()
{
return true;
}
public String getScheme()
{
return "file";
}
/**
* Returns the full url for the given path.
*/
public String getURL()
{
if (! isWindows())
return escapeURL("file:" + getFullPath());
String path = getFullPath();
int length = path.length();
CharBuffer cb = new CharBuffer();
// #2725, server/1495
cb.append("file:");
char ch;
int offset = 0;
// For windows, convert /c: to c:
if (length >= 3
&& path.charAt(0) == '/'
&& path.charAt(2) == ':'
&& ('a' <= (ch = path.charAt(1)) && ch <= 'z'
|| 'A' <= ch && ch <= 'Z')) {
// offset = 1;
}
else if (length >= 3
&& path.charAt(0) == '/'
&& path.charAt(1) == ':'
&& path.charAt(2) == '/') {
cb.append('/');
cb.append('/');
cb.append('/');
cb.append('/');
offset = 3;
}
for (; offset < length; offset++) {
ch = path.charAt(offset);
if (ch == '\\')
cb.append('/');
else
cb.append(ch);
}
return escapeURL(cb.toString());
}
/**
* Returns the native path.
*/
public String getNativePath()
{
if (! isWindows())
return getFullPath();
String path = getFullPath();
int length = path.length();
CharBuffer cb = new CharBuffer();
char ch;
int offset = 0;
// For windows, convert /c: to c:
if (length >= 3
&& path.charAt(0) == '/'
&& path.charAt(2) == ':'
&& ('a' <= (ch = path.charAt(1)) && ch <= 'z'
|| 'A' <= ch && ch <= 'Z')) {
offset = 1;
}
else if (length >= 3
&& path.charAt(0) == '/'
&& path.charAt(1) == ':'
&& path.charAt(2) == '/') {
cb.append('\\');
cb.append('\\');
offset = 3;
}
for (; offset < length; offset++) {
ch = path.charAt(offset);
if (ch == '/')
cb.append(_separatorChar);
else
cb.append(ch);
}
return cb.toString();
}
@Override
public boolean exists()
{
try {
if (_isWindows && isAux())
return false;
else
return getFile().exists();
} catch (AccessControlException e) {
log.finer(e.toString());
return false;
}
}
@Override
public int getMode()
{
int perms = 0;
if (isDirectory()) {
perms += 01000;
perms += 0111;
}
if (canRead())
perms += 0444;
if (canWrite())
perms += 0220;
return perms;
}
public boolean isDirectory()
{
try {
return getFile().isDirectory();
} catch (AccessControlException e) {
log.finer(e.toString());
return false;
}
}
public boolean isFile()
{
try {
if (_isWindows && isAux())
return false;
else
return getFile().isFile();
} catch (AccessControlException e) {
log.finer(e.toString());
return false;
}
}
@Override
public boolean isLink()
{
try {
return isLinkImpl();
} catch (Throwable e) {
if (log.isLoggable(Level.FINEST)) {
log.finest(e.toString());
}
return false;
}
}
private boolean isLinkImpl()
throws Exception
{
return (Boolean) _isSymlink.invoke(_toPath.invoke(getFile()));
}
public long getLength()
{
try {
return getFile().length();
} catch (AccessControlException e) {
log.finer(e.toString());
return -1;
}
}
public long getLastModified()
{
try {
return getFile().lastModified();
} catch (AccessControlException e) {
log.finer(e.toString());
return -1;
}
}
// This exists in JDK 1.2
public void setLastModified(long time)
{
getFile().setLastModified(time);
}
public boolean canRead()
{
try {
File file = getFile();
if (_isWindows && isAux())
return false;
else
return file.canRead();
} catch (AccessControlException e) {
log.finer(e.toString());
return false;
}
}
public boolean canWrite()
{
try {
File file = getFile();
if (_isWindows && isAux())
return false;
else
return file.canWrite();
} catch (AccessControlException e) {
log.finer(e.toString());
return false;
}
}
/**
* Returns a list of files in the directory.
*/
public String []list() throws IOException
{
try {
String []list = getFile().list();
if (list != null)
return list;
} catch (AccessControlException e) {
log.finer(e.toString());
}
return new String[0];
}
public boolean mkdir()
throws IOException
{
boolean value = getFile().mkdir();
if (! value && ! getFile().isDirectory())
throw new IOException("cannot create directory");
return value;
}
public boolean mkdirs()
throws IOException
{
File file = getFile();
boolean value;
synchronized (file) {
value = file.mkdirs();
}
clearStatusCache();
if (! value && ! file.isDirectory())
throw new IOException("Cannot create directory: " + getFile());
return value;
}
@Override
public boolean remove()
{
if (getFile().delete()) {
clearStatusCache();
return true;
}
/*
if (getPath().endsWith(".jar")) {
// XXX:
// Jar.create(this).clearCache();
return getFile().delete();
}
*/
return false;
}
@Override
public boolean truncate(long length)
throws IOException
{
File file = getFile();
clearStatusCache();
FileOutputStream fos = new FileOutputStream(file);
try {
fos.getChannel().truncate(length);
return true;
} finally {
fos.close();
}
}
public boolean renameTo(Path path)
{
if (! (path instanceof FilePath))
return false;
FilePath file = (FilePath) path;
clearStatusCache();
file.clearStatusCache();
return this.getFile().renameTo(file.getFile());
}
/**
* Returns the stream implementation for a read stream.
*/
public StreamImpl openReadImpl() throws IOException
{
if (_isWindows && isAux())
throw new FileNotFoundException(_file.toString());
/* XXX: only for Solaris (?)
if (isDirectory())
throw new IOException("is directory");
*/
return new FileReadStream(new FileInputStream(getFile()), this);
}
public StreamImpl openWriteImpl() throws IOException
{
FileWriteStream fws = new FileWriteStream(
new FileOutputStream(getFile()),
this);
fws.setNewline(NEWLINE);
return fws;
}
public StreamImpl openAppendImpl() throws IOException
{
FileOutputStream fos = null;
try {
fos = new FileOutputStream(getFile().toString(), true);
} catch (IOException e) {
// MacOS hack
fos = new FileOutputStream(getFile().toString());
}
FileWriteStream fws = new FileWriteStream(fos);
fws.setNewline(NEWLINE);
return fws;
}
@Override
public StreamImpl openReadWriteImpl() throws IOException
{
VfsStream os;
os = new VfsStream(new FileInputStream(getFile()),
new FileOutputStream(getFile()),
this);
os.setNewline(NEWLINE);
return os;
}
/**
* Returns the stream implementation for a random-access stream.
*/
@Override
public RandomAccessStream openFileRandomAccess() throws IOException
{
if (_isWindows && isAux())
throw new FileNotFoundException(_file.toString());
return new FileRandomAccessStream(new RandomAccessFile(getFile(), "rw"));
}
@Override
public RandomAccessStream openMemoryMappedFile(long fileSize)
throws IOException
{
if (CauchoSystem.isJdk7()) {
return RandomAccessStreamNio.open(this, fileSize);
}
else {
return null;
}
}
@Override
public FileChannelFactory fileChannelFactory()
{
return new FileChannelFactoryImpl();
}
@Override
public Path copy()
{
return new FilePath(getRoot(), getUserPath(), getPath());
}
public int hashCode()
{
return getFullPath().hashCode();
}
public boolean equals(Object b)
{
if (this == b)
return true;
if (! (b instanceof FilePath))
return false;
FilePath file = (FilePath) b;
return getFullPath().equals(file.getFullPath());
}
/**
* Lazily returns the native File object.
*/
public File getFile()
{
if (_file != null)
return _file;
_file = new File(getNativePath());
return _file;
}
/**
* Special case for the evil windows special
*/
protected boolean isAux()
{
if (! _isWindows)
return false;
File file = getFile();
String path = getFullPath().toLowerCase(Locale.ENGLISH);
int len = path.length();
int p = path.indexOf("/aux");
int ch;
if (p >= 0 && (len <= p + 4 || path.charAt(p + 4) == '.'))
return true;
p = path.indexOf("/con");
if (p >= 0 && (len <= p + 4 || path.charAt(p + 4) == '.'))
return true;
p = path.indexOf("/lpt");
if (p >= 0
&& (len <= p + 5 || path.charAt(p + 5) == '.')
&& '0' <= (ch = path.charAt(p + 4)) && ch <= '9') {
return true;
}
p = path.indexOf("/nul");
if (p >= 0 && (len <= p + 4 || path.charAt(p + 4) == '.'))
return true;
return false;
}
private class FileChannelFactoryImpl implements FileChannelFactory
{
@Override
public FileChannel openFileChannel(OpenOption... options) throws IOException
{
try {
java.nio.file.Path jdkPath;
jdkPath = (java.nio.file.Path) _toPath.invoke(getFile());
return (FileChannel) _fileChannelOpen.invoke(null, jdkPath, options);
} catch (Exception e) {
log.finer(e.toString());
return null;
}
}
}
static {
Method isSymlink = null;
Method toPath = null;
Method fileChannelOpen = null;
try {
Class path = Class.forName("java.nio.file.Path");
Class files = Class.forName("java.nio.file.Files");
isSymlink = files.getMethod("isSymbolicLink", path);
toPath = File.class.getMethod("toPath");
fileChannelOpen = FileChannel.class.getMethod("open", java.nio.file.Path.class, OpenOption[].class);
} catch (Throwable e) {
}
_isSymlink = isSymlink;
_toPath = toPath;
_fileChannelOpen = fileChannelOpen;
}
}