io.undertow.server.handlers.LocalNameResolvingHandler Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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.
*/
package io.undertow.server.handlers;
import io.undertow.UndertowLogger;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.builder.HandlerBuilder;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedExceptionAction;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
/**
* A handler that performs DNS lookup to resolve a local address. Unresolved local address may be created when a front
* end server has sent a X-forwarded-host header or AJP is in use
*
* @author Stuart Douglas
*/
public class LocalNameResolvingHandler implements HttpHandler {
private final HttpHandler next;
private final ResolveType resolveType;
public LocalNameResolvingHandler(HttpHandler next) {
this.next = next;
this.resolveType = ResolveType.FORWARD_AND_REVERSE;
}
public LocalNameResolvingHandler(HttpHandler next, ResolveType resolveType) {
this.next = next;
this.resolveType = resolveType;
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
final InetSocketAddress address = exchange.getDestinationAddress();
if (address != null) {
if ((resolveType == ResolveType.FORWARD || resolveType == ResolveType.FORWARD_AND_REVERSE)
&& address.isUnresolved()) {
try {
if (System.getSecurityManager() == null) {
final InetSocketAddress resolvedAddress = new InetSocketAddress(InetAddress.getByName(address.getHostName()), address.getPort());
exchange.setDestinationAddress(resolvedAddress);
} else {
AccessController.doPrivileged(new PrivilegedExceptionAction
© 2015 - 2024 Weber Informatics LLC | Privacy Policy