/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.net.protocol.file;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.net.URLConnection;
import java.net.URL;
import java.net.MalformedURLException;
import java.net.URLDecoder;
import java.security.Permission;
import java.io.FilePermission;
import java.io.BufferedInputStream;
/**
* Provides local file access via URL semantics, correctly returning
* the last modified time of the underlying file.
*
* @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
* @author <a href="mailto:scott.stark@jboss.org">Scott.Stark</a>
* @version $Revision: 1581 $
*/
public class FileURLConnection extends URLConnection
{
static boolean decodeFilePaths = true;
static
{
String flag = System.getProperty("org.jboss.net.protocol.file.decodeFilePaths");
if (flag != null)
decodeFilePaths = Boolean.valueOf(flag).booleanValue();
}
protected File file;
public FileURLConnection(final URL url) throws MalformedURLException, IOException
{
super(url);
String path = url.getPath();
if (decodeFilePaths)
path = URLDecoder.decode(path, "UTF-8");
// Convert the url '/' to the os file separator
file = new File(path.replace('/', File.separatorChar).replace('|', ':'));
doOutput = false;
}
/**
* Returns the underlying file for this connection.
*/
public File getFile()
{
return file;
}
/**
* Checks if the underlying file for this connection exists.
*
* @throws FileNotFoundException
*/
public void connect() throws IOException
{
if (connected)
return;
if (!file.exists())
{
throw new FileNotFoundException(file.getPath());
}
connected = true;
}
public InputStream getInputStream() throws IOException
{
if (!connected)
connect();
return new FileInputStream(file);
}
public OutputStream getOutputStream() throws IOException
{
if (!connected)
connect();
SecurityManager sm = System.getSecurityManager();
if( sm != null )
{
// Check for write access
FilePermission p = new FilePermission(file.getPath(), "write");
sm.checkPermission(p);
}
return new FileOutputStream(file);
}
/**
* Provides support for returning the value for the
* <tt>last-modified</tt> header.
*/
public String getHeaderField(final String name)
{
String headerField = null;
if (name.equalsIgnoreCase("last-modified"))
headerField = String.valueOf(getLastModified());
else if (name.equalsIgnoreCase("content-length"))
headerField = String.valueOf(file.length());
else if (name.equalsIgnoreCase("content-type"))
{
headerField = getFileNameMap().getContentTypeFor(file.getName());
if( headerField == null )
{
try
{
InputStream is = getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
headerField = URLConnection.guessContentTypeFromStream(bis);
bis.close();
}
catch(IOException e)
{
}
}
}
else if (name.equalsIgnoreCase("date"))
headerField = String.valueOf(file.lastModified());
else
{
// This always returns null currently
headerField = super.getHeaderField(name);
}
return headerField;
}
/**
* Return a permission for reading of the file
*/
public Permission getPermission() throws IOException
{
return new FilePermission(file.getPath(), "read");
}
/**
* Returns the last modified time of the underlying file.
*/
public long getLastModified()
{
return file.lastModified();
}
}