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/*
* Copyright (c) 1999, 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 url)
throws IOException {
return openConnection(url, null);
}
public synchronized URLConnection openConnection(URL url, Proxy p)
throws IOException {
String path;
String file = url.getFile();
String host = url.getHost();
path = ParseUtil.decode(file);
path = path.replace('/', '\\');
path = path.replace('|', ':');
if ((host == null) || host.equals("") ||
host.equalsIgnoreCase("localhost") ||
host.equals("~")) {
return createFileURLConnection(url, new File(path));
}
/*
* attempt to treat this as a UNC path. See 4180841
*/
path = "\\\\" + host + path;
File f = new File(path);
if (f.exists()) {
return createFileURLConnection(url, f);
}
/*
* Now attempt an ftp connection.
*/
URLConnection uc;
URL newurl;
try {
newurl = new URL("ftp", host, file +
(url.getRef() == null ? "":
"#" + url.getRef()));
if (p != null) {
uc = newurl.openConnection(p);
} else {
uc = newurl.openConnection();
}
} catch (IOException e) {
uc = null;
}
if (uc == null) {
throw new IOException("Unable to connect to: " +
url.toExternalForm());
}
return uc;
}
/**
* Template method to be overriden by Java Plug-in. [stanleyh]
*/
protected URLConnection createFileURLConnection(URL url, File file) {
return new FileURLConnection(url, 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);
}
}
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