99 lines
3.3 KiB
Java
99 lines
3.3 KiB
Java
/*
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* Copyright (c) 1996, 1998, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*-
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* netdoc urls point either into the local filesystem or externally
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* through an http url, with network documents being preferred. Useful for
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* FAQs & other documents which are likely to be changing over time at the
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* central site, and where the user will want the most recent edition.
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*
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* @author Steven B. Byrne
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*/
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package sun.net.www.protocol.netdoc;
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import java.net.URL;
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import java.net.URLConnection;
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import java.net.MalformedURLException;
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import java.net.URLStreamHandler;
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import java.io.InputStream;
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import java.io.IOException;
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public class Handler extends URLStreamHandler {
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static URL base;
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/*
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* Attempt to find a load the given url using the default (network)
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* documentation location. If that fails, use the local copy
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*/
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public synchronized URLConnection openConnection(URL u)
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throws IOException
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{
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URLConnection uc = null;
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URL ru;
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Boolean tmp = java.security.AccessController.doPrivileged(
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new sun.security.action.GetBooleanAction("newdoc.localonly"));
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boolean localonly = tmp.booleanValue();
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String docurl = java.security.AccessController.doPrivileged(
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new sun.security.action.GetPropertyAction("doc.url"));
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String file = u.getFile();
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if (!localonly) {
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try {
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if (base == null) {
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base = new URL(docurl);
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}
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ru = new URL(base, file);
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} catch (MalformedURLException e) {
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ru = null;
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}
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if (ru != null) {
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uc = ru.openConnection();
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}
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}
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if (uc == null) {
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try {
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ru = new URL("file", "~", file);
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uc = ru.openConnection();
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InputStream is = uc.getInputStream(); // Check for success.
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} catch (MalformedURLException e) {
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uc = null;
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} catch (IOException e) {
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uc = null;
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}
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}
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if (uc == null) {
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throw new IOException("Can't find file for URL: "
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+u.toExternalForm());
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}
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return uc;
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}
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}
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