/*

 * Copyright (c) 2000, 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 4258697

 * @library /test/lib

 * @summary Make sure that http CONTINUE status followed by invalid

 * response doesn't cause HttpClient to recursively loop and

 * eventually StackOverflow.

 *

 */

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.IOException;

import java.io.PrintStream;

import java.net.InetAddress;

import java.net.ServerSocket;

import java.net.Socket;

import java.net.URL;

import java.net.HttpURLConnection;

import jdk.test.lib.net.URIBuilder;

import static java.net.Proxy.NO_PROXY;

public class HttpContinueStackOverflow {

    static class Server implements Runnable {

        ServerSocket serverSock ;

        Server() throws IOException {

            serverSock = new ServerSocket(0, 0, InetAddress.getLoopbackAddress());

        }

        int getLocalPort() {

            return serverSock.getLocalPort();

        }

        public void run() {

            Socket sock = null;

            try {

                serverSock.setSoTimeout(10000);

                sock = serverSock.accept();

                /* setup streams and read http request */

                BufferedReader in = new BufferedReader(

                    new InputStreamReader(sock.getInputStream()));

                PrintStream out = new PrintStream( sock.getOutputStream() );

                in.readLine();

                /* send continue followed by invalid response */

                out.println("HTTP/1.1 100 Continue\r");

                out.println("\r");

                out.println("junk junk junk");

                out.flush();

            } catch (Exception e) {

                e.printStackTrace();

            } finally {

                try { serverSock.close(); } catch (IOException unused) {}

                try { sock.close(); } catch (IOException unused) {}

            }

        }

    }

    HttpContinueStackOverflow() throws Exception {

        /* create the server */

        Server s = new Server();

        (new Thread(s)).start();

        /* connect to server and get response code */

        URL url = URIBuilder.newBuilder()

                .scheme("http")

                .loopback()

                .port(s.getLocalPort())

                .path("/anything.html")

                .toURL();

        HttpURLConnection conn = (HttpURLConnection)url.openConnection(NO_PROXY);

        conn.getResponseCode();

        System.out.println("TEST PASSED");

    }

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

        System.out.println("Testing 100-Continue");

        new HttpContinueStackOverflow();

    }

}