protocol/jar/Handler.java

0N/A/*
4019N/A * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation.  Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.net.www.protocol.jar;
0N/A
4019N/Aimport java.io.IOException;
0N/Aimport java.net.*;
0N/Aimport sun.net.www.ParseUtil;
0N/A
0N/A/*
0N/A * Jar URL Handler
0N/A */
0N/Apublic class Handler extends java.net.URLStreamHandler {
0N/A
0N/A    private static final String separator = "!/";
0N/A
0N/A    protected java.net.URLConnection openConnection(URL u)
0N/A    throws IOException {
0N/A        return new JarURLConnection(u, this);
0N/A    }
0N/A
4019N/A    private static int indexOfBangSlash(String spec) {
0N/A        int indexOfBang = spec.length();
0N/A        while((indexOfBang = spec.lastIndexOf('!', indexOfBang)) != -1) {
0N/A            if ((indexOfBang != (spec.length() - 1)) &&
0N/A                (spec.charAt(indexOfBang + 1) == '/')) {
0N/A                return indexOfBang + 1;
0N/A            } else {
0N/A                indexOfBang--;
0N/A            }
0N/A        }
0N/A        return -1;
0N/A    }
0N/A
4019N/A    /**
4019N/A     * Compare two jar URLs
4019N/A     */
4019N/A    @Override
4019N/A    protected boolean sameFile(URL u1, URL u2) {
4019N/A        if (!u1.getProtocol().equals("jar") || !u2.getProtocol().equals("jar"))
4019N/A            return false;
4019N/A
4019N/A        String file1 = u1.getFile();
4019N/A        String file2 = u2.getFile();
4019N/A        int sep1 = file1.indexOf(separator);
4019N/A        int sep2 = file2.indexOf(separator);
4019N/A
4019N/A        if (sep1 == -1 || sep2 == -1) {
4019N/A            return super.sameFile(u1, u2);
4019N/A        }
4019N/A
4019N/A        String entry1 = file1.substring(sep1 + 2);
4019N/A        String entry2 = file2.substring(sep2 + 2);
4019N/A
4019N/A        if (!entry1.equals(entry2))
4019N/A            return false;
4019N/A
4019N/A        URL enclosedURL1 = null, enclosedURL2 = null;
4019N/A        try {
4019N/A            enclosedURL1 = new URL(file1.substring(0, sep1));
4019N/A            enclosedURL2 = new URL(file2.substring(0, sep2));
4019N/A        } catch (MalformedURLException unused) {
4019N/A            return super.sameFile(u1, u2);
4019N/A        }
4019N/A
4019N/A        if (!super.sameFile(enclosedURL1, enclosedURL2)) {
4019N/A            return false;
4019N/A        }
4019N/A
4019N/A        return true;
4019N/A    }
4019N/A
4019N/A    @Override
4019N/A    protected int hashCode(URL u) {
4019N/A        int h = 0;
4019N/A
4019N/A        String protocol = u.getProtocol();
4019N/A        if (protocol != null)
4019N/A            h += protocol.hashCode();
4019N/A
4019N/A        String file = u.getFile();
4019N/A        int sep = file.indexOf(separator);
4019N/A
4019N/A        if (sep == -1)
4019N/A            return h + file.hashCode();
4019N/A
4019N/A        URL enclosedURL = null;
4019N/A        String fileWithoutEntry = file.substring(0, sep);
4019N/A        try {
4019N/A            enclosedURL = new URL(fileWithoutEntry);
4019N/A            h += enclosedURL.hashCode();
4019N/A        } catch (MalformedURLException unused) {
4019N/A            h += fileWithoutEntry.hashCode();
4019N/A        }
4019N/A
4019N/A        String entry = file.substring(sep + 2);
4019N/A        h += entry.hashCode();
4019N/A
4019N/A        return h;
4019N/A    }
4019N/A
4019N/A
4019N/A    @Override
0N/A    protected void parseURL(URL url, String spec,
0N/A                            int start, int limit) {
0N/A        String file = null;
0N/A        String ref = null;
0N/A        // first figure out if there is an anchor
0N/A        int refPos = spec.indexOf('#', limit);
0N/A        boolean refOnly = refPos == start;
0N/A        if (refPos > -1) {
0N/A            ref = spec.substring(refPos + 1, spec.length());
0N/A            if (refOnly) {
0N/A                file = url.getFile();
0N/A            }
0N/A        }
0N/A        // then figure out if the spec is
0N/A        // 1. absolute (jar:)
0N/A        // 2. relative (i.e. url + foo/bar/baz.ext)
0N/A        // 3. anchor-only (i.e. url + #foo), which we already did (refOnly)
0N/A        boolean absoluteSpec = false;
0N/A        if (spec.length() >= 4) {
0N/A            absoluteSpec = spec.substring(0, 4).equalsIgnoreCase("jar:");
0N/A        }
0N/A        spec = spec.substring(start, limit);
0N/A
0N/A        if (absoluteSpec) {
0N/A            file = parseAbsoluteSpec(spec);
0N/A        } else if (!refOnly) {
0N/A            file = parseContextSpec(url, spec);
0N/A
0N/A            // Canonize the result after the bangslash
0N/A            int bangSlash = indexOfBangSlash(file);
0N/A            String toBangSlash = file.substring(0, bangSlash);
0N/A            String afterBangSlash = file.substring(bangSlash);
0N/A            sun.net.www.ParseUtil canonizer = new ParseUtil();
0N/A            afterBangSlash = canonizer.canonizeString(afterBangSlash);
0N/A            file = toBangSlash + afterBangSlash;
0N/A        }
0N/A        setURL(url, "jar", "", -1, file, ref);
0N/A    }
0N/A
0N/A    private String parseAbsoluteSpec(String spec) {
0N/A        URL url = null;
0N/A        int index = -1;
0N/A        // check for !/
0N/A        if ((index = indexOfBangSlash(spec)) == -1) {
0N/A            throw new NullPointerException("no !/ in spec");
0N/A        }
0N/A        // test the inner URL
0N/A        try {
0N/A            String innerSpec = spec.substring(0, index - 1);
0N/A            url = new URL(innerSpec);
0N/A        } catch (MalformedURLException e) {
0N/A            throw new NullPointerException("invalid url: " +
0N/A                                           spec + " (" + e + ")");
0N/A        }
0N/A        return spec;
0N/A    }
0N/A
0N/A    private String parseContextSpec(URL url, String spec) {
0N/A        String ctxFile = url.getFile();
0N/A        // if the spec begins with /, chop up the jar back !/
0N/A        if (spec.startsWith("/")) {
0N/A            int bangSlash = indexOfBangSlash(ctxFile);
0N/A            if (bangSlash == -1) {
0N/A                throw new NullPointerException("malformed " +
0N/A                                               "context url:" +
0N/A                                               url +
0N/A                                               ": no !/");
0N/A            }
0N/A            ctxFile = ctxFile.substring(0, bangSlash);
0N/A        }
0N/A        if (!ctxFile.endsWith("/") && (!spec.startsWith("/"))){
0N/A            // chop up the last component
0N/A            int lastSlash = ctxFile.lastIndexOf('/');
0N/A            if (lastSlash == -1) {
0N/A                throw new NullPointerException("malformed " +
0N/A                                               "context url:" +
0N/A                                               url);
0N/A            }
0N/A            ctxFile = ctxFile.substring(0, lastSlash + 1);
0N/A        }
0N/A        return (ctxFile + spec);
0N/A    }
0N/A}