OpenSearch/test/fixtures/s3-fixture/src/main/java/fixture/s3/S3HttpFixture.java

/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package fixture.s3;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import org.opensearch.rest.RestStatus;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.Objects;

public class S3HttpFixture {

    private final HttpServer server;

    S3HttpFixture(final String[] args) throws Exception {
        this.server = HttpServer.create(new InetSocketAddress(InetAddress.getByName(args[0]), Integer.parseInt(args[1])), 0);
        this.server.createContext("/", Objects.requireNonNull(createHandler(args)));
    }

    final void start() throws Exception {
        try {
            server.start();
            // wait to be killed
            Thread.sleep(Long.MAX_VALUE);
        } finally {
            server.stop(0);
        }
    }

    protected HttpHandler createHandler(final String[] args) {
        final String bucket = Objects.requireNonNull(args[2]);
        final String basePath = args[3];
        final String accessKey = Objects.requireNonNull(args[4]);

        return new S3HttpHandler(bucket, basePath) {
            @Override
            public void handle(final HttpExchange exchange) throws IOException {
                final String authorization = exchange.getRequestHeaders().getFirst("Authorization");
                if (authorization == null || authorization.contains(accessKey) == false) {
                    sendError(exchange, RestStatus.FORBIDDEN, "AccessDenied", "Bad access key");
                    return;
                }
                super.handle(exchange);
            }
        };
    }

    public static void main(final String[] args) throws Exception {
        if (args == null || args.length < 5) {
            throw new IllegalArgumentException("S3HttpFixture expects 5 arguments [address, port, bucket, base path, access key]");
        }
        final S3HttpFixture fixture = new S3HttpFixture(args);
        fixture.start();
    }
}