/*

 * Copyright (c) 2015, 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.

 */

import com.sun.net.httpserver.*;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.InetSocketAddress;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

/**

 * Extremely simple server that only performs one task.  The server listens for

 * requests on the ephemeral port.  If it sees a request that begins with

 * "/multi-release.jar", it consumes the request and returns a stream of bytes

 * representing the jar file multi-release.jar found in "userdir".

 */

class SimpleHttpServer {

    private static final String userdir = System.getProperty("user.dir", ".");

    private static final Path multirelease = Paths.get(userdir, "multi-release.jar");

    private final HttpServer server;

    public SimpleHttpServer() throws IOException {

        server = HttpServer.create();

    }

    public void start() throws IOException {

        server.bind(new InetSocketAddress(0), 0);

        server.createContext("/multi-release.jar", t -> {

            try (InputStream is = t.getRequestBody()) {

                is.readAllBytes();  // probably not necessary to consume request

                byte[] bytes = Files.readAllBytes(multirelease);

                t.sendResponseHeaders(200, bytes.length);

                try (OutputStream os = t.getResponseBody()) {

                    os.write(bytes);

                }

            }

        });

        server.setExecutor(null); // creates a default executor

        server.start();

    }

    public void stop() {

        server.stop(0);

    }

    int getPort() {

        return server.getAddress().getPort();

    }

}