/*

 * Copyright (c) 2014, 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.

 *

 * 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.

 */

/*

 * @test

 * @bug 8027308

 * @modules java.base/sun.net.www.protocol.http

 * @summary  verifies that HttpURLConnection does not send the zone id in the

 *           'Host' field of the header:

 *              Host: [fe80::a00:27ff:aaaa:aaaa] instead of

 *              Host: [fe80::a00:27ff:aaaa:aaaa%eth0]"

 */

import com.sun.net.httpserver.Headers;

import com.sun.net.httpserver.HttpExchange;

import com.sun.net.httpserver.HttpHandler;

import com.sun.net.httpserver.HttpServer;

import java.io.IOException;

import java.net.*;

import java.util.Enumeration;

import java.util.List;

import java.util.concurrent.CompletableFuture;

import java.util.concurrent.ExecutionException;

public class ZoneId {

    public static void main(String[] args) throws Exception {

        InetAddress address = getAppropriateIPv6Address();

        if (address == null) {

            System.out.println(

                    "The test will be skipped as not a single " +

                    "appropriate IPv6 address was found on this machine");

            return;

        }

        String ip6_literal = address.getHostAddress();

        System.out.println("Found an appropriate IPv6 address: " + address);

        System.out.println("Starting http server...");

        HttpServer server =

                HttpServer.create(new InetSocketAddress(address, 0), 0);

        CompletableFuture<Headers> headers = new CompletableFuture<>();

        server.createContext("/", createCapturingHandler(headers));

        server.start();

        System.out.println("Started at " + server.getAddress());

        try {

            String spec = "http://[" + address.getHostAddress() + "]:" + server.getAddress().getPort();

            System.out.println("Client is connecting to: " + spec);

            URLConnection urlConnection = new URL(spec).openConnection();

            ((sun.net.www.protocol.http.HttpURLConnection) urlConnection)

                    .getResponseCode();

        } finally {

            System.out.println("Shutting down the server...");

            server.stop(0);

        }

        int idx = ip6_literal.lastIndexOf('%');

        String ip6_address = ip6_literal.substring(0, idx);

        List<String> hosts = headers.get().get("Host");

        System.out.println("Host: " + hosts);

        if (hosts.size() != 1 || hosts.get(0).contains("%") ||

                                !hosts.get(0).contains(ip6_address)) {

            throw new RuntimeException("FAIL");

        }

    }

    private static InetAddress getAppropriateIPv6Address() throws SocketException {

        System.out.println("Searching through the network interfaces...");

        Enumeration<NetworkInterface> is = NetworkInterface.getNetworkInterfaces();

        while (is.hasMoreElements()) {

            NetworkInterface i = is.nextElement();

            System.out.println("\tinterface: " + i);

            // just a "good enough" marker that the interface

            // does not support a loopback and therefore should not be used

            if ( i.getHardwareAddress() == null) continue;

            if (!i.isUp()) continue;

            Enumeration<InetAddress> as = i.getInetAddresses();

            while (as.hasMoreElements()) {

                InetAddress a = as.nextElement();

                System.out.println("\t\taddress: " + a.getHostAddress());

                if ( !(a instanceof Inet6Address &&

                       a.toString().contains("%")) ) {

                    continue;

                }

                return a;

            }

        }

        return null;

    }

    private static HttpHandler createCapturingHandler(CompletableFuture<Headers> headers) {

        return new HttpHandler() {

            @Override

            public void handle(HttpExchange exchange) throws IOException {

                headers.complete(exchange.getRequestHeaders());

                exchange.sendResponseHeaders(HttpURLConnection.HTTP_OK, -1);

                exchange.close();

            }

        };

    }

}