Importing upstream Jetty jetty-9.2.1.v20140609

[gigi.git] / lib / jetty / org / eclipse / jetty / server / HostHeaderCustomizer.java

diff --git a/lib/jetty/org/eclipse/jetty/server/HostHeaderCustomizer.java b/lib/jetty/org/eclipse/jetty/server/HostHeaderCustomizer.java
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+++ b/lib/jetty/org/eclipse/jetty/server/HostHeaderCustomizer.java
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+//
+//  ========================================================================
+//  Copyright (c) 1995-2014 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;
+
+import javax.servlet.http.HttpServletRequest;
+
+/**
+ * Customizes requests that lack the {@code Host} header (for example, HTTP 1.0 requests).
+ * <p />
+ * 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.
+ * <p />
+ * 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);
+        }
+    }
+}