/*

 * Copyright (c) 2006, 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 6361557

 * @summary  Lightweight HTTP server quickly runs out of file descriptors on Linux

 */

import com.sun.net.httpserver.*;

import java.util.*;

import java.util.concurrent.*;

import java.io.*;

import java.nio.*;

import java.nio.channels.*;

import java.net.*;

import java.security.*;

import java.security.cert.*;

import javax.net.ssl.*;

/**

 * The test simply opens 10,000 separate connections

 * and invokes one http request on each. The client does

 * not close any sockets until after they are closed

 * by the server. This verifies the basic ability

 * of the server to manage a reasonable number of connections

 */

public class B6361557 {

    public static boolean error = false;

    static class Handler implements HttpHandler {

        int invocation = 1;

        public void handle (HttpExchange t)

            throws IOException

        {

            InputStream is = t.getRequestBody();

            Headers map = t.getRequestHeaders();

            Headers rmap = t.getResponseHeaders();

            while (is.read () != -1) ;

            is.close();

            t.sendResponseHeaders (200, -1);

            t.close();

        }

    }

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

        Handler handler = new Handler();

        InetSocketAddress addr = new InetSocketAddress (0);

        HttpServer server = HttpServer.create (addr, 0);

        HttpContext ctx = server.createContext ("/test", handler);

        ExecutorService executor = Executors.newCachedThreadPool();

        server.setExecutor (executor);

        server.start ();

        final int NUM = 10000;

        ByteBuffer buf = ByteBuffer.allocate (4096);

        InetSocketAddress destaddr = new InetSocketAddress (

                "127.0.0.1", server.getAddress().getPort()

        );

        System.out.println ("destaddr " + destaddr);

        Selector selector = Selector.open ();

        int i = 0;

        while (true) {

            i ++;

            int selres = selector.select (1);

            Set<SelectionKey> selkeys = selector.selectedKeys();

            for (SelectionKey key : selkeys) {

                if (key.isReadable()) {

                    SocketChannel chan = (SocketChannel)key.channel();

                    buf.clear();

                    try {

                        int x = chan.read (buf);

                        if (x == -1) {

                            chan.close();

                        }

                    } catch (IOException e) {}

                }

            }

            if (i< NUM) {

                SocketChannel schan = SocketChannel.open (destaddr);

                String cmd = "GET /test/foo.html HTTP/1.1\r\nContent-length: 0\r\n\r\n";

                buf.rewind ();

                buf.put (cmd.getBytes());

                buf.flip();

                int c = 0;

                while (buf.remaining() > 0) {

                    c += schan.write (buf);

                }

                schan.configureBlocking (false);

                schan.register (selector, SelectionKey.OP_READ, null);

            } else {

                System.out.println ("Finished clients");

                server.stop (1);

                executor.shutdown ();

                return;

            }

        }

    }

}