1/*
2 * Copyright (c) 2009, Oracle and/or its affiliates. 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package sun.net.util;
27
28import java.io.IOException;
29import java.net.URL;
30import java.net.URLPermission;
31import java.security.Permission;
32
33/**
34 * URL Utility class.
35 */
36public class URLUtil {
37    /**
38     * Returns a string form of the url suitable for use as a key in HashMap/Sets.
39     *
40     * The string form should be behave in the same manner as the URL when
41     * compared for equality in a HashMap/Set, except that no nameservice
42     * lookup is done on the hostname (only string comparison), and the fragment
43     * is not considered.
44     *
45     * @see java.net.URLStreamHandler.sameFile(java.net.URL)
46     */
47    public static String urlNoFragString(URL url) {
48        StringBuilder strForm = new StringBuilder();
49
50        String protocol = url.getProtocol();
51        if (protocol != null) {
52            /* protocol is compared case-insensitive, so convert to lowercase */
53            protocol = protocol.toLowerCase();
54            strForm.append(protocol);
55            strForm.append("://");
56        }
57
58        String host = url.getHost();
59        if (host != null) {
60            /* host is compared case-insensitive, so convert to lowercase */
61            host = host.toLowerCase();
62            strForm.append(host);
63
64            int port = url.getPort();
65            if (port == -1) {
66                /* if no port is specificed then use the protocols
67                 * default, if there is one */
68                port = url.getDefaultPort();
69            }
70            if (port != -1) {
71                strForm.append(":").append(port);
72            }
73        }
74
75        String file = url.getFile();
76        if (file != null) {
77            strForm.append(file);
78        }
79
80        return strForm.toString();
81    }
82
83    public static Permission getConnectPermission(URL url) throws IOException {
84        String urlStringLowerCase = url.toString().toLowerCase();
85        if (urlStringLowerCase.startsWith("http:") || urlStringLowerCase.startsWith("https:")) {
86            return getURLConnectPermission(url);
87        } else if (urlStringLowerCase.startsWith("jar:http:") || urlStringLowerCase.startsWith("jar:https:")) {
88            String urlString = url.toString();
89            int bangPos = urlString.indexOf("!/");
90            urlString = urlString.substring(4, bangPos > -1 ? bangPos : urlString.length());
91            URL u = new URL(urlString);
92            return getURLConnectPermission(u);
93            // If protocol is HTTP or HTTPS than use URLPermission object
94        } else {
95            return url.openConnection().getPermission();
96        }
97    }
98
99    private static Permission getURLConnectPermission(URL url) {
100        String urlString = url.getProtocol() + "://" + url.getAuthority() + url.getPath();
101        return new URLPermission(urlString);
102    }
103}
104
105