/*
* 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.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FilePermission;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLDecoder;
import java.security.Permission;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
/**
* 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>
* @author <a href="mailto:dimitris@jboss.org">Dimitris Andreadis</a>
* @version $Revision: 2866 $
*/
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();
}
}
/** The underlying file */
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('|', ':'));
super.doOutput = false;
}
/**
* Returns the underlying file for this connection.
* @return the file
*/
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
{
connect();
if (file.isDirectory())
{
// return a sorted list of the directory contents
String[] files = file.list();
Arrays.sort(files);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < files.length; i++)
{
sb.append(files[i]).append("\n");
}
return new ByteArrayInputStream(sb.toString().getBytes());
}
else
{
return new FileInputStream(file);
}
}
// We should probably disallow this?
public OutputStream getOutputStream() throws IOException
{
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 the following headers:
*
* <tt>last-modified</tt>
* <tt>content-length</tt>
* <tt>content-type</tt>
* <tt>date</tt>
*/
public String getHeaderField(final String name)
{
String headerField = null;
if (name.equalsIgnoreCase("last-modified"))
{
long lastModified = getLastModified();
if (lastModified != 0)
{
// return the last modified date formatted according to RFC 1123
Date modifiedDate = new Date(lastModified);
SimpleDateFormat sdf = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'", Locale.US);
sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
headerField = sdf.format(modifiedDate);
}
}
else if (name.equalsIgnoreCase("content-length"))
{
headerField = String.valueOf(file.length());
}
else if (name.equalsIgnoreCase("content-type"))
{
if (file.isDirectory())
{
headerField = "text/plain";
}
else
{
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)
{
// ignore
}
}
}
}
else if (name.equalsIgnoreCase("date"))
{
headerField = String.valueOf(getLastModified());
}
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();
}
}