91 lines
3.3 KiB
Java
91 lines
3.3 KiB
Java
/* Handler.java -- "file" protocol handler for java.net
|
|
Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath 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, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package gnu.java.net.protocol.file;
|
|
|
|
import java.io.IOException;
|
|
import java.net.URL;
|
|
import java.net.URLConnection;
|
|
import java.net.URLStreamHandler;
|
|
|
|
/**
|
|
* This is the protocol handler for the "file" protocol.
|
|
* It implements the abstract openConnection() method from
|
|
* URLStreamHandler by returning a new FileURLConnection object (from
|
|
* this package). All other methods are inherited
|
|
*
|
|
* @author Aaron M. Renn (arenn@urbanophile.com)
|
|
* @author Warren Levy (warrenl@cygnus.com)
|
|
*/
|
|
public class Handler extends URLStreamHandler
|
|
{
|
|
/**
|
|
* A do nothing constructor
|
|
*/
|
|
public Handler()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* This method returs a new FileURLConnection for the specified URL
|
|
*
|
|
* @param url The URL to return a connection for
|
|
*
|
|
* @return The URLConnection
|
|
*
|
|
* @exception IOException If an error occurs
|
|
*/
|
|
protected URLConnection openConnection(URL url) throws IOException
|
|
{
|
|
// If a hostname is set, then we need to switch protocols to ftp
|
|
// in order to transfer this from the remote host.
|
|
String host = url.getHost();
|
|
if ((host != null) && (! host.equals("")))
|
|
{
|
|
// Reset the protocol (and implicitly the handler) for this URL.
|
|
// Then have the URL attempt the connection again, as it will
|
|
// get the changed handler the next time around.
|
|
// If the ftp protocol handler is not installed, an
|
|
// exception will be thrown from the new openConnection() call.
|
|
setURL (url, "ftp", url.getHost(), url.getPort(), url.getFile(),
|
|
url.getRef());
|
|
return url.openConnection();
|
|
}
|
|
|
|
return new Connection(url);
|
|
}
|
|
} // class Handler
|