org.glassfish.jersey.client.innate.http.SniConfigurator Maven / Gradle / Ivy

/*
 * Copyright (c) 2023 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.jersey.client.innate.http;

import javax.net.ssl.SNIHostName;
import javax.net.ssl.SNIServerName;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLParameters;
import javax.net.ssl.SSLSocket;
import jakarta.ws.rs.core.HttpHeaders;
import java.net.URI;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Optional;

/**
 * A unified routines to set {@link SNIHostName} for the {@link javax.net.ssl.SSLContext}.
 * To be reused in connectors.
 */
final class SniConfigurator {
    private final String hostName;
    private SniConfigurator(String hostName) {
        this.hostName = hostName;
    }

    /**
     * Get the hostName from the {@link HttpHeaders#HOST} header.
     * @return
     */
    String getHostName() {
        return hostName;
    }

    /**
     * Create ClientSNI when {@link HttpHeaders#HOST} is set different from the request URI host (or {@code whenDiffer}.is false).
     * @param hostUri the Uri of the HTTP request
     * @param headers the HttpHeaders
     * @param whenDiffer create {@SniConfigurator only when different from the request URI host}
     * @return ClientSNI or empty when {@link HttpHeaders#HOST}
     */
    static Optional createWhenHostHeader(URI hostUri, Map> headers, boolean whenDiffer) {
        List