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//
//  ========================================================================
//  Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.server;

import java.util.Objects;

/**
 * Customizes requests that lack the {@code Host} header (for example, HTTP 1.0 requests).
 * 

* In case of HTTP 1.0 requests that lack the {@code Host} header, the application may issue * a redirect, and the {@code Location} header is usually constructed from the {@code Host} * header; if the {@code Host} header is missing, the server may query the connector for its * IP address in order to construct the {@code Location} header, and thus leak to clients * internal IP addresses. *

* This {@link HttpConfiguration.Customizer} is configured with a {@code serverName} and * optionally a {@code serverPort}. * If the {@code Host} header is absent, the configured {@code serverName} will be set on * the request so that {@link HttpServletRequest#getServerName()} will return that value, * and likewise for {@code serverPort} and {@link HttpServletRequest#getServerPort()}. */ public class HostHeaderCustomizer implements HttpConfiguration.Customizer { private final String serverName; private final int serverPort; /** * @param serverName the {@code serverName} to set on the request (the {@code serverPort} will not be set) */ public HostHeaderCustomizer(String serverName) { this(serverName, 0); } /** * @param serverName the {@code serverName} to set on the request * @param serverPort the {@code serverPort} to set on the request */ public HostHeaderCustomizer(String serverName, int serverPort) { this.serverName = Objects.requireNonNull(serverName); this.serverPort = serverPort; } @Override public void customize(Connector connector, HttpConfiguration channelConfig, Request request) { if (request.getHeader("Host") == null) { request.setServerName(serverName); if (serverPort > 0) request.setServerPort(serverPort); } } }





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