mirror of git://gcc.gnu.org/git/gcc.git
102 lines
3.3 KiB
Java
102 lines
3.3 KiB
Java
/* RemoteURLLoader.java -- a URLLoader for "remote" objects
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.net.loader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.net.URLConnection;
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import java.net.URLStreamHandlerFactory;
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/**
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* Loader for remote directories.
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*/
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public final class RemoteURLLoader extends URLLoader
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{
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private final String protocol;
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public RemoteURLLoader(URLClassLoader classloader,
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URLStreamHandlerCache cache,
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URLStreamHandlerFactory factory,
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URL url)
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{
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super(classloader, cache, factory, url);
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protocol = url.getProtocol();
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}
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/**
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* Get a remote resource.
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* Returns null if no such resource exists.
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*/
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public Resource getResource(String name)
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{
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try
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{
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URL url = new URL(baseURL, name, cache.get(factory, protocol));
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URLConnection connection = url.openConnection();
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// Open the connection and check the stream
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// just to be sure it exists.
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int length = connection.getContentLength();
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InputStream stream = connection.getInputStream();
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// We can do some extra checking if it is a http request
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if (connection instanceof HttpURLConnection)
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{
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int response =
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((HttpURLConnection) connection).getResponseCode();
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if (response / 100 != 2)
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return null;
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}
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if (stream != null)
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return new RemoteResource(this, name, url, stream, length);
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else
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return null;
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}
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catch (IOException ioe)
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{
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return null;
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}
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}
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}
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