/*

 * 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

package jdk.jfr.api.consumer.security;

import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.time.Duration;

import java.time.Instant;

import jdk.jfr.Event;

import jdk.jfr.Recording;

import jdk.jfr.consumer.EventStream;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.process.ProcessTools;

/**

 * @test

 * @summary Test that a stream can be opened against a remote repository using

 *          only file permission

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

 *

 * @run main/othervm jdk.jfr.api.consumer.security.TestStreamingRemote

 */

public class TestStreamingRemote {

    private static final String SUCCESS = "Success!";

    public static class TestEvent extends Event {

    }

    public static class Test {

        public static void main(String... args) throws Exception {

            Path repo = Paths.get(args[0]);

            System.out.println("Repository: " + repo);

            try (EventStream es = EventStream.openRepository(repo)) {

                es.setStartTime(Instant.EPOCH);

                es.onEvent(e -> {

                    System.out.println(SUCCESS);

                    es.close();

                });

                es.start();

            }

        }

    }

    public static void main(String... args) throws Exception {

        try (Recording r = new Recording()) {

            r.setFlushInterval(Duration.ofSeconds(1));

            r.start();

            String repository = System.getProperty("jdk.jfr.repository");

            Path policy = createPolicyFile(repository);

            TestEvent e = new TestEvent();

            e.commit();

            String[] c = new String[4];

            c[0] = "-Djava.security.manager";

            c[1] = "-Djava.security.policy=" + escapeBackslashes(policy.toString());

            c[2] = Test.class.getName();

            c[3] = repository;

            OutputAnalyzer oa = ProcessTools.executeTestJvm(c);

            oa.shouldContain(SUCCESS);

        }

    }

    private static Path createPolicyFile(String repository) throws IOException {

        Path policy = Paths.get("permission.policy").toAbsolutePath();

        try (PrintWriter pw = new PrintWriter(policy.toFile())) {

            pw.println("grant {");

            // All the files and directories the contained in path

            String dir = escapeBackslashes(repository);

            String contents = escapeBackslashes(repository + File.separatorChar + "-");

            pw.println("  permission java.io.FilePermission \"" + dir + "\", \"read\";");

            pw.println("  permission java.io.FilePermission \"" + contents + "\", \"read\";");

            pw.println("};");

            pw.println();

        }

        System.out.println("Permission file: " + policy);

        for (String line : Files.readAllLines(policy)) {

            System.out.println(line);

        }

        System.out.println();

        return policy;

    }

    // Needed for Windows

    private static String escapeBackslashes(String text) {

        return text.replace("\\", "\\\\");

    }

}