/* * 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);    }}