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+/* RemoteURLLoader.java -- a URLLoader for "remote" objects
+ Copyright (C) 2006 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.loader;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.net.URLConnection;
+import java.net.URLStreamHandlerFactory;
+
+/**
+ * Loader for remote directories.
+ */
+public final class RemoteURLLoader extends URLLoader
+{
+ private final String protocol;
+
+ public RemoteURLLoader(URLClassLoader classloader,
+ URLStreamHandlerCache cache,
+ URLStreamHandlerFactory factory,
+ URL url)
+ {
+ super(classloader, cache, factory, url);
+ protocol = url.getProtocol();
+ }
+
+ /**
+ * Get a remote resource.
+ * Returns null if no such resource exists.
+ */
+ public Resource getResource(String name)
+ {
+ try
+ {
+ URL url = new URL(baseURL, name, cache.get(factory, protocol));
+ URLConnection connection = url.openConnection();
+
+ // Open the connection and check the stream
+ // just to be sure it exists.
+ int length = connection.getContentLength();
+ InputStream stream = connection.getInputStream();
+
+ // We can do some extra checking if it is a http request
+ if (connection instanceof HttpURLConnection)
+ {
+ int response =
+ ((HttpURLConnection) connection).getResponseCode();
+ if (response / 100 != 2)
+ return null;
+ }
+
+ if (stream != null)
+ return new RemoteResource(this, name, url, stream, length);
+ else
+ return null;
+ }
+ catch (IOException ioe)
+ {
+ return null;
+ }
+ }
+} \ No newline at end of file