/*

 * Copyright (c) 2017, 2018, 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 8175814

 * @modules java.net.http java.logging jdk.httpserver

 * @library /lib/testlibrary/ /

 * @build ProxyServer

 * @run main/othervm -Djdk.httpclient.HttpClient.log=errors,requests,headers,trace VersionTest

 */

import com.sun.net.httpserver.Headers;

import com.sun.net.httpserver.HttpContext;

import com.sun.net.httpserver.HttpExchange;

import com.sun.net.httpserver.HttpHandler;

import com.sun.net.httpserver.HttpServer;

import java.io.IOException;

import java.io.OutputStream;

import java.net.InetAddress;

import java.net.URI;

import java.net.InetSocketAddress;

import java.net.ProxySelector;

import java.util.concurrent.Executors;

import java.util.concurrent.ExecutorService;

import java.net.http.HttpClient;

import java.net.http.HttpRequest;

import java.net.http.HttpResponse;

import java.net.http.HttpResponse.BodyHandlers;

import static java.net.http.HttpClient.Version.HTTP_1_1;

import static java.net.http.HttpClient.Version.HTTP_2;

public class VersionTest {

    static HttpServer s1 ;

    static ProxyServer proxy;

    static ExecutorService executor;

    static int port;

    static InetSocketAddress proxyAddr;

    static HttpClient client, clientWithProxy;

    static URI uri;

    static volatile boolean error = false;

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

        initServer();

        client = HttpClient.newBuilder()

                           .executor(executor)

                           .build();

        clientWithProxy = HttpClient.newBuilder()

                           .executor(executor)

                           .proxy(ProxySelector.of(proxyAddr))

                           .build();

        // first check that the version is HTTP/2

        if (client.version() != HttpClient.Version.HTTP_2) {

            throw new RuntimeException("Default version not HTTP_2");

        }

        try {

            test(HTTP_1_1, false);

            test(HTTP_2, false);

            test(HTTP_2, true);

        } finally {

            s1.stop(0);

            executor.shutdownNow();

        }

        if (error)

            throw new RuntimeException();

    }

    public static void test(HttpClient.Version version, boolean proxy) throws Exception {

        HttpRequest r = HttpRequest.newBuilder(uri)

                .version(version)

                .GET()

                .build();

        HttpClient c = proxy ? clientWithProxy : client;

        HttpResponse<Void> resp = c.send(r, BodyHandlers.discarding());

        System.out.printf("Client: response is %d\n", resp.statusCode());

        if (resp.version() != HTTP_1_1) {

            throw new RuntimeException();

        }

        //System.out.printf("Client: response body is %s\n", resp.body());

    }

    static void initServer() throws Exception {

        InetSocketAddress addr = new InetSocketAddress(InetAddress.getLoopbackAddress(), 0);

        s1 = HttpServer.create (addr, 0);

        HttpHandler h = new Handler();

        HttpContext c1 = s1.createContext("/", h);

        executor = Executors.newCachedThreadPool();

        s1.setExecutor(executor);

        s1.start();

        port = s1.getAddress().getPort();

        uri = new URI("http://localhost:" + Integer.toString(port) + "/foo");

        System.out.println("HTTP server port = " + port);

        proxy = new ProxyServer(0, false);

        int proxyPort = proxy.getPort();

        proxyAddr = new InetSocketAddress(InetAddress.getLoopbackAddress(), proxyPort);

    }

    static class Handler implements HttpHandler {

        int counter;

        void checkHeader(Headers h) {

            counter++;

            if (counter == 1 && h.containsKey("Upgrade")) {

                VersionTest.error = true;

            }

            if (counter == 2 && !h.containsKey("Upgrade")) {

                VersionTest.error = true;

            }

            if (counter == 3 && h.containsKey("Upgrade")) {

                VersionTest.error = true;

            }

        }

        @Override

        public synchronized void handle(HttpExchange t) throws IOException {

            String reply = "Hello world";

            int len = reply.length();

            Headers h = t.getRequestHeaders();

            checkHeader(h);

            System.out.printf("Sending response 200\n");

            t.sendResponseHeaders(200, len);

            OutputStream o = t.getResponseBody();

            o.write(reply.getBytes());

            t.close();

        }

    }

}