1 //
2 // ========================================================================
3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.server;
20
21 import java.util.Objects;
22
23 /**
24 * Customizes requests that lack the {@code Host} header (for example, HTTP 1.0 requests).
25 * <p />
26 * In case of HTTP 1.0 requests that lack the {@code Host} header, the application may issue
27 * a redirect, and the {@code Location} header is usually constructed from the {@code Host}
28 * header; if the {@code Host} header is missing, the server may query the connector for its
29 * IP address in order to construct the {@code Location} header, and thus leak to clients
30 * internal IP addresses.
31 * <p />
32 * This {@link HttpConfiguration.Customizer} is configured with a {@code serverName} and
33 * optionally a {@code serverPort}.
34 * If the {@code Host} header is absent, the configured {@code serverName} will be set on
35 * the request so that {@link HttpServletRequest#getServerName()} will return that value,
36 * and likewise for {@code serverPort} and {@link HttpServletRequest#getServerPort()}.
37 */
38 public class HostHeaderCustomizer implements HttpConfiguration.Customizer
39 {
40 private final String serverName;
41 private final int serverPort;
42
43 /**
44 * @param serverName the {@code serverName} to set on the request (the {@code serverPort} will not be set)
45 */
46 public HostHeaderCustomizer(String serverName)
47 {
48 this(serverName, 0);
49 }
50
51 /**
52 * @param serverName the {@code serverName} to set on the request
53 * @param serverPort the {@code serverPort} to set on the request
54 */
55 public HostHeaderCustomizer(String serverName, int serverPort)
56 {
57 this.serverName = Objects.requireNonNull(serverName);
58 this.serverPort = serverPort;
59 }
60
61 @Override
62 public void customize(Connector connector, HttpConfiguration channelConfig, Request request)
63 {
64 if (request.getHeader("Host") == null)
65 {
66 request.setServerName(serverName);
67 if (serverPort > 0)
68 request.setServerPort(serverPort);
69 }
70 }
71 }