/*
* Copyright (c) 1997, 2011, 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.jar;
import java.io.IOException;
import java.net.*;
import sun.net.www.ParseUtil;
/*
* Jar URL Handler
*/
public class Handler extends java.net.URLStreamHandler {
private static final String separator = "!/";
protected java.net.URLConnection openConnection(URL u)
throws IOException {
return new JarURLConnection(u, this);
}
private static int indexOfBangSlash(String spec) {
int indexOfBang = spec.length();
while((indexOfBang = spec.lastIndexOf('!', indexOfBang)) != -1) {
if ((indexOfBang != (spec.length() - 1)) &&
(spec.charAt(indexOfBang + 1) == '/')) {
return indexOfBang + 1;
} else {
indexOfBang--;
}
}
return -1;
}
/**
* Compare two jar URLs
*/
@Override
protected boolean sameFile(URL u1, URL u2) {
if (!u1.getProtocol().equals("jar") || !u2.getProtocol().equals("jar"))
return false;
String file1 = u1.getFile();
String file2 = u2.getFile();
int sep1 = file1.indexOf(separator);
int sep2 = file2.indexOf(separator);
if (sep1 == -1 || sep2 == -1) {
return super.sameFile(u1, u2);
}
String entry1 = file1.substring(sep1 + 2);
String entry2 = file2.substring(sep2 + 2);
if (!entry1.equals(entry2))
return false;
URL enclosedURL1 = null, enclosedURL2 = null;
try {
enclosedURL1 = new URL(file1.substring(0, sep1));
enclosedURL2 = new URL(file2.substring(0, sep2));
} catch (MalformedURLException unused) {
return super.sameFile(u1, u2);
}
if (!super.sameFile(enclosedURL1, enclosedURL2)) {
return false;
}
return true;
}
@Override
protected int hashCode(URL u) {
int h = 0;
String protocol = u.getProtocol();
if (protocol != null)
h += protocol.hashCode();
String file = u.getFile();
int sep = file.indexOf(separator);
if (sep == -1)
return h + file.hashCode();
URL enclosedURL = null;
String fileWithoutEntry = file.substring(0, sep);
try {
enclosedURL = new URL(fileWithoutEntry);
h += enclosedURL.hashCode();
} catch (MalformedURLException unused) {
h += fileWithoutEntry.hashCode();
}
String entry = file.substring(sep + 2);
h += entry.hashCode();
return h;
}
@Override
protected void parseURL(URL url, String spec,
int start, int limit) {
String file = null;
String ref = null;
// first figure out if there is an anchor
int refPos = spec.indexOf('#', limit);
boolean refOnly = refPos == start;
if (refPos > -1) {
ref = spec.substring(refPos + 1, spec.length());
if (refOnly) {
file = url.getFile();
}
}
// then figure out if the spec is
// 1. absolute (jar:)
// 2. relative (i.e. url + foo/bar/baz.ext)
// 3. anchor-only (i.e. url + #foo), which we already did (refOnly)
boolean absoluteSpec = false;
if (spec.length() >= 4) {
absoluteSpec = spec.substring(0, 4).equalsIgnoreCase("jar:");
}
spec = spec.substring(start, limit);
if (absoluteSpec) {
file = parseAbsoluteSpec(spec);
} else if (!refOnly) {
file = parseContextSpec(url, spec);
// Canonize the result after the bangslash
int bangSlash = indexOfBangSlash(file);
String toBangSlash = file.substring(0, bangSlash);
String afterBangSlash = file.substring(bangSlash);
sun.net.www.ParseUtil canonizer = new ParseUtil();
afterBangSlash = canonizer.canonizeString(afterBangSlash);
file = toBangSlash + afterBangSlash;
}
setURL(url, "jar", "", -1, file, ref);
}
private String parseAbsoluteSpec(String spec) {
URL url = null;
int index = -1;
// check for !/
if ((index = indexOfBangSlash(spec)) == -1) {
throw new NullPointerException("no !/ in spec");
}
// test the inner URL
try {
String innerSpec = spec.substring(0, index - 1);
url = new URL(innerSpec);
} catch (MalformedURLException e) {
throw new NullPointerException("invalid url: " +
spec + " (" + e + ")");
}
return spec;
}
private String parseContextSpec(URL url, String spec) {
String ctxFile = url.getFile();
// if the spec begins with /, chop up the jar back !/
if (spec.startsWith("/")) {
int bangSlash = indexOfBangSlash(ctxFile);
if (bangSlash == -1) {
throw new NullPointerException("malformed " +
"context url:" +
url +
": no !/");
}
ctxFile = ctxFile.substring(0, bangSlash);
}
if (!ctxFile.endsWith("/") && (!spec.startsWith("/"))){
// chop up the last component
int lastSlash = ctxFile.lastIndexOf('/');
if (lastSlash == -1) {
throw new NullPointerException("malformed " +
"context url:" +
url);
}
ctxFile = ctxFile.substring(0, lastSlash + 1);
}
return (ctxFile + spec);
}
}