/*

 * Copyright (c) 2009, 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.util;

import java.io.IOException;

import java.net.URL;

import java.net.URLPermission;

import java.security.Permission;

/**

 * URL Utility class.

 */

public class URLUtil {

    /**

     * Returns a string form of the url suitable for use as a key in HashMap/Sets.

     *

     * The string form should be behave in the same manner as the URL when

     * compared for equality in a HashMap/Set, except that no nameservice

     * lookup is done on the hostname (only string comparison), and the fragment

     * is not considered.

     *

     * @see java.net.URLStreamHandler.sameFile(java.net.URL)

     */

    public static String urlNoFragString(URL url) {

        StringBuilder strForm = new StringBuilder();

        String protocol = url.getProtocol();

        if (protocol != null) {

            /* protocol is compared case-insensitive, so convert to lowercase */

            protocol = protocol.toLowerCase();

            strForm.append(protocol);

            strForm.append("://");

        }

        String host = url.getHost();

        if (host != null) {

            /* host is compared case-insensitive, so convert to lowercase */

            host = host.toLowerCase();

            strForm.append(host);

            int port = url.getPort();

            if (port == -1) {

                /* if no port is specificed then use the protocols

                 * default, if there is one */

                port = url.getDefaultPort();

            }

            if (port != -1) {

                strForm.append(":").append(port);

            }

        }

        String file = url.getFile();

        if (file != null) {

            strForm.append(file);

        }

        return strForm.toString();

    }

    public static Permission getConnectPermission(URL url) throws IOException {

        String urlStringLowerCase = url.toString().toLowerCase();

        if (urlStringLowerCase.startsWith("http:") || urlStringLowerCase.startsWith("https:")) {

            return getURLConnectPermission(url);

        } else if (urlStringLowerCase.startsWith("jar:http:") || urlStringLowerCase.startsWith("jar:https:")) {

            String urlString = url.toString();

            int bangPos = urlString.indexOf("!/");

            urlString = urlString.substring(4, bangPos > -1 ? bangPos : urlString.length());

            URL u = new URL(urlString);

            return getURLConnectPermission(u);

            // If protocol is HTTP or HTTPS than use URLPermission object

        } else {

            return url.openConnection().getPermission();

        }

    }

    private static Permission getURLConnectPermission(URL url) {

        String urlString = url.getProtocol() + "://" + url.getAuthority() + url.getPath();

        return new URLPermission(urlString);

    }

}