J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.net.www.protocol.jar; |
| 27 | |
| 28 | import java.io.*; |
| 29 | import java.net.*; |
| 30 | import java.util.*; |
| 31 | import sun.net.www.ParseUtil; |
| 32 | |
| 33 | /* |
| 34 | * Jar URL Handler |
| 35 | */ |
| 36 | public class Handler extends java.net.URLStreamHandler { |
| 37 | |
| 38 | private static final String separator = "!/"; |
| 39 | |
| 40 | protected java.net.URLConnection openConnection(URL u) |
| 41 | throws IOException { |
| 42 | return new JarURLConnection(u, this); |
| 43 | } |
| 44 | |
| 45 | private int indexOfBangSlash(String spec) { |
| 46 | int indexOfBang = spec.length(); |
| 47 | while((indexOfBang = spec.lastIndexOf('!', indexOfBang)) != -1) { |
| 48 | if ((indexOfBang != (spec.length() - 1)) && |
| 49 | (spec.charAt(indexOfBang + 1) == '/')) { |
| 50 | return indexOfBang + 1; |
| 51 | } else { |
| 52 | indexOfBang--; |
| 53 | } |
| 54 | } |
| 55 | return -1; |
| 56 | } |
| 57 | |
| 58 | protected void parseURL(URL url, String spec, |
| 59 | int start, int limit) { |
| 60 | String file = null; |
| 61 | String ref = null; |
| 62 | // first figure out if there is an anchor |
| 63 | int refPos = spec.indexOf('#', limit); |
| 64 | boolean refOnly = refPos == start; |
| 65 | if (refPos > -1) { |
| 66 | ref = spec.substring(refPos + 1, spec.length()); |
| 67 | if (refOnly) { |
| 68 | file = url.getFile(); |
| 69 | } |
| 70 | } |
| 71 | // then figure out if the spec is |
| 72 | // 1. absolute (jar:) |
| 73 | // 2. relative (i.e. url + foo/bar/baz.ext) |
| 74 | // 3. anchor-only (i.e. url + #foo), which we already did (refOnly) |
| 75 | boolean absoluteSpec = false; |
| 76 | if (spec.length() >= 4) { |
| 77 | absoluteSpec = spec.substring(0, 4).equalsIgnoreCase("jar:"); |
| 78 | } |
| 79 | spec = spec.substring(start, limit); |
| 80 | |
| 81 | if (absoluteSpec) { |
| 82 | file = parseAbsoluteSpec(spec); |
| 83 | } else if (!refOnly) { |
| 84 | file = parseContextSpec(url, spec); |
| 85 | |
| 86 | // Canonize the result after the bangslash |
| 87 | int bangSlash = indexOfBangSlash(file); |
| 88 | String toBangSlash = file.substring(0, bangSlash); |
| 89 | String afterBangSlash = file.substring(bangSlash); |
| 90 | sun.net.www.ParseUtil canonizer = new ParseUtil(); |
| 91 | afterBangSlash = canonizer.canonizeString(afterBangSlash); |
| 92 | file = toBangSlash + afterBangSlash; |
| 93 | } |
| 94 | setURL(url, "jar", "", -1, file, ref); |
| 95 | } |
| 96 | |
| 97 | private String parseAbsoluteSpec(String spec) { |
| 98 | URL url = null; |
| 99 | int index = -1; |
| 100 | // check for !/ |
| 101 | if ((index = indexOfBangSlash(spec)) == -1) { |
| 102 | throw new NullPointerException("no !/ in spec"); |
| 103 | } |
| 104 | // test the inner URL |
| 105 | try { |
| 106 | String innerSpec = spec.substring(0, index - 1); |
| 107 | url = new URL(innerSpec); |
| 108 | } catch (MalformedURLException e) { |
| 109 | throw new NullPointerException("invalid url: " + |
| 110 | spec + " (" + e + ")"); |
| 111 | } |
| 112 | return spec; |
| 113 | } |
| 114 | |
| 115 | private String parseContextSpec(URL url, String spec) { |
| 116 | String ctxFile = url.getFile(); |
| 117 | // if the spec begins with /, chop up the jar back !/ |
| 118 | if (spec.startsWith("/")) { |
| 119 | int bangSlash = indexOfBangSlash(ctxFile); |
| 120 | if (bangSlash == -1) { |
| 121 | throw new NullPointerException("malformed " + |
| 122 | "context url:" + |
| 123 | url + |
| 124 | ": no !/"); |
| 125 | } |
| 126 | ctxFile = ctxFile.substring(0, bangSlash); |
| 127 | } |
| 128 | if (!ctxFile.endsWith("/") && (!spec.startsWith("/"))){ |
| 129 | // chop up the last component |
| 130 | int lastSlash = ctxFile.lastIndexOf('/'); |
| 131 | if (lastSlash == -1) { |
| 132 | throw new NullPointerException("malformed " + |
| 133 | "context url:" + |
| 134 | url); |
| 135 | } |
| 136 | ctxFile = ctxFile.substring(0, lastSlash + 1); |
| 137 | } |
| 138 | return (ctxFile + spec); |
| 139 | } |
| 140 | } |