/*

 * Copyright (c) 2019, 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 8222968

 * @summary ByteArrayPublisher is not thread-safe resulting in broken re-use of HttpRequests

 * @run main/othervm ByteArrayPublishers

 */

import java.net.InetAddress;

import java.net.URI;

import java.net.URISyntaxException;

import java.net.http.HttpClient;

import java.net.http.HttpRequest;

import java.net.http.HttpResponse;

import java.util.ArrayList;

import java.util.concurrent.LinkedBlockingQueue;

import java.util.concurrent.CompletableFuture;

import com.sun.net.httpserver.HttpExchange;

import com.sun.net.httpserver.HttpServer;

import java.io.IOException;

import java.net.InetSocketAddress;

import java.nio.charset.StandardCharsets;

import static java.net.http.HttpRequest.BodyPublisher;

import static java.net.http.HttpRequest.BodyPublishers;

public class ByteArrayPublishers {

    private static final BodyPublisher BODY_PUBLISHER =

        BodyPublishers.ofByteArray("abcdefghijklmnopqrstuvwxyz".getBytes());

    static int LOOPS = 100;

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

        HttpServer server = null;

        try {

            InetAddress loopBack = InetAddress.getLoopbackAddress();

            String lpBackStr = loopBack.getHostAddress();

            InetSocketAddress serverAddr = new InetSocketAddress(loopBack, 0);

            server = HttpServer.create(serverAddr, 500);

            server.createContext("/", (HttpExchange e) -> {

                    e.getRequestBody().readAllBytes();

                    String response = "Hello world";

                    e.sendResponseHeaders(200, response.length());

                    e.getResponseBody().write(response.getBytes(StandardCharsets.ISO_8859_1));

                    e.close();

            });

            server.start();

            var address = server.getAddress();

            URI dest = new URI("http://" + lpBackStr + ":"

                + Integer.toString(address.getPort()) + "/");

            HttpClient client = createClient();

            ArrayList<CompletableFuture<HttpResponse<Void>>> futures = new ArrayList<>(LOOPS);

            LinkedBlockingQueue<Object> results = new LinkedBlockingQueue<Object>();

            for (int i=0;i<LOOPS;i++) {

                futures.add(

                    client.sendAsync(createRequest(dest), HttpResponse.BodyHandlers.discarding())

                          .handle((v, t) -> {

                                if (t != null)

                                    results.add(t);

                                else

                                    results.add(v);

                                return null;

                          }));

            }

            for (int i=0; i<LOOPS; i++) {

                Object o = results.take();

                if (o instanceof Exception) {

                    throw new RuntimeException((Exception)o);

                }

            }

        } finally {

            server.stop(1);

        }

    }

    private static HttpRequest createRequest(URI uri) throws URISyntaxException {

        HttpRequest.Builder builder = HttpRequest.newBuilder(uri)

                .method("POST", BODY_PUBLISHER)

                .version(HttpClient.Version.HTTP_1_1);

        builder.header("content-type", "text/plain");

        return builder.build();

    }

    private static HttpClient createClient() {

        return HttpClient.newBuilder()

                .version(HttpClient.Version.HTTP_1_1)

                .build();

    }

}