| /* |
| * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.net.www.protocol.file; |
| |
| import java.net.InetAddress; |
| import java.net.URLConnection; |
| import java.net.URL; |
| import java.net.Proxy; |
| import java.net.MalformedURLException; |
| import java.net.URLStreamHandler; |
| import java.io.InputStream; |
| import java.io.IOException; |
| import sun.net.www.ParseUtil; |
| import java.io.File; |
| |
| /** |
| * Open an file input stream given a URL. |
| * @author James Gosling |
| */ |
| public class Handler extends URLStreamHandler { |
| |
| private String getHost(URL url) { |
| String host = url.getHost(); |
| if (host == null) |
| host = ""; |
| return host; |
| } |
| |
| |
| protected void parseURL(URL u, String spec, int start, int limit) { |
| /* |
| * Ugly backwards compatibility. Flip any file separator |
| * characters to be forward slashes. This is a nop on Unix |
| * and "fixes" win32 file paths. According to RFC 2396, |
| * only forward slashes may be used to represent hierarchy |
| * separation in a URL but previous releases unfortunately |
| * performed this "fixup" behavior in the file URL parsing code |
| * rather than forcing this to be fixed in the caller of the URL |
| * class where it belongs. Since backslash is an "unwise" |
| * character that would normally be encoded if literally intended |
| * as a non-seperator character the damage of veering away from the |
| * specification is presumably limited. |
| */ |
| super.parseURL(u, spec.replace(File.separatorChar, '/'), start, limit); |
| } |
| |
| public synchronized URLConnection openConnection(URL u) |
| throws IOException { |
| return openConnection(u, null); |
| } |
| |
| public synchronized URLConnection openConnection(URL u, Proxy p) |
| throws IOException { |
| String host = u.getHost(); |
| if (host == null || host.equals("") || host.equals("~") || |
| host.equalsIgnoreCase("localhost")) { |
| File file = new File(ParseUtil.decode(u.getPath())); |
| return createFileURLConnection(u, file); |
| } |
| |
| /* If you reach here, it implies that you have a hostname |
| so attempt an ftp connection. |
| */ |
| URLConnection uc; |
| URL ru; |
| |
| try { |
| ru = new URL("ftp", host, u.getFile() + |
| (u.getRef() == null ? "": "#" + u.getRef())); |
| if (p != null) { |
| uc = ru.openConnection(p); |
| } else { |
| uc = ru.openConnection(); |
| } |
| } catch (IOException e) { |
| uc = null; |
| } |
| if (uc == null) { |
| throw new IOException("Unable to connect to: " + |
| u.toExternalForm()); |
| } |
| return uc; |
| } |
| |
| // Template method to be overriden by Java Plug-in. [stanleyh] |
| // |
| protected URLConnection createFileURLConnection(URL u, File file) |
| { |
| return new FileURLConnection(u, file); |
| } |
| |
| /** |
| * Compares the host components of two URLs. |
| * @param u1 the URL of the first host to compare |
| * @param u2 the URL of the second host to compare |
| * @return <tt>true</tt> if and only if they |
| * are equal, <tt>false</tt> otherwise. |
| */ |
| protected boolean hostsEqual(URL u1, URL u2) { |
| /* |
| * Special case for file: URLs |
| * per RFC 1738 no hostname is equivalent to 'localhost' |
| * i.e. file:///path is equal to file://localhost/path |
| */ |
| String s1 = u1.getHost(); |
| String s2 = u2.getHost(); |
| if ("localhost".equalsIgnoreCase(s1) && ( s2 == null || "".equals(s2))) |
| return true; |
| if ("localhost".equalsIgnoreCase(s2) && ( s1 == null || "".equals(s1))) |
| return true; |
| return super.hostsEqual(u1, u2); |
| } |
| } |