/*
 * Copyright (c) 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 8178699
 * @modules java.net.http
 * @run main/othervm RestrictedHeadersTest
 * @run main/othervm -Djdk.httpclient.allowRestrictedHeaders=content-length,connection RestrictedHeadersTest content-length connection
 * @run main/othervm -Djdk.httpclient.allowRestrictedHeaders=host,upgrade RestrictedHeadersTest host upgrade
 * @run main/othervm -Djdk.httpclient.allowRestrictedHeaders=via RestrictedHeadersTest via
 */

import java.net.URI;
import java.net.http.HttpRequest;
import java.util.Set;

public class RestrictedHeadersTest {
    public static void main(String[] args) {
        if (args.length == 0) {
            runDefaultTest();
        } else {
            runTest(Set.of(args));
        }
    }

    // This list must be same as impl

    static Set<String> defaultRestrictedHeaders =
            Set.of("connection", "content-length", "expect", "host", "upgrade");

    private static void runDefaultTest() {
        System.out.println("DEFAULT TEST: no property set");
        for (String header : defaultRestrictedHeaders) {
            checkHeader(header, "foo", false);
        }
        // miscellaneous others that should succeed
        checkHeader("foobar", "barfoo", true);
        checkHeader("date", "today", true);
    }

    private static void checkHeader(String name, String value, boolean succeed) {
        try {
            HttpRequest request = HttpRequest.newBuilder(URI.create("https://foo.com/"))
                    .header(name, value)
                    .GET()
                    .build();
            if (!succeed) {
                String s = name+"/"+value+" should have failed";
                throw new RuntimeException(s);
            }
            System.out.printf("%s = %s succeeded as expected\n", name, value);
        } catch (IllegalArgumentException iae) {
            if (succeed) {
                String s = name+"/"+value+" should have succeeded";
                throw new RuntimeException(s);
            }
            System.out.printf("%s = %s failed as expected\n", name, value);
        }
    }

    // args is the Set of allowed restricted headers
    private static void runTest(Set<String> args) {
        System.out.print("RUNTEST: allowed headers set in property: ");
        for (String arg : args) System.out.printf("%s ", arg);
        System.out.println("");

        for (String header : args) {
            checkHeader(header, "val", true);
        }
        for (String header : defaultRestrictedHeaders) {
            if (!args.contains(header)) {
                checkHeader(header, "foo", false);
            }
        }
    }
}