| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.ambari.server.utils; |
| |
| import java.util.Arrays; |
| import java.util.Set; |
| |
| import javax.servlet.http.HttpServletRequest; |
| |
| import org.springframework.web.context.request.RequestContextHolder; |
| import org.springframework.web.context.request.ServletRequestAttributes; |
| |
| import com.google.common.collect.ImmutableSet; |
| |
| /** |
| * The purpose of this helper is to get remote address from an HTTP request |
| */ |
| public class RequestUtils { |
| |
| private static Set<String> headersToCheck= ImmutableSet.copyOf(Arrays.asList( |
| "X-Forwarded-For", "Proxy-Client-IP", "WL-Proxy-Client-IP", "HTTP_CLIENT_IP", "HTTP_X_FORWARDED_FOR")); |
| |
| /** |
| * Returns remote address |
| * @param request contains the details of http request |
| * @return |
| */ |
| public static String getRemoteAddress(HttpServletRequest request) { |
| String ip = null; |
| for (String header : headersToCheck) { |
| ip = request.getHeader(header); |
| if (!isRemoteAddressUnknown(ip)) { |
| break; |
| } |
| } |
| if (isRemoteAddressUnknown(ip)) { |
| ip = request.getRemoteAddr(); |
| } |
| if (containsMultipleRemoteAddresses(ip)) { |
| ip = ip.substring(0, ip.indexOf(",")); |
| } |
| return ip; |
| } |
| |
| /** |
| * Returns remote address by using {@link HttpServletRequest} from {@link RequestContextHolder} |
| * @return |
| */ |
| public static String getRemoteAddress() { |
| |
| if(hasValidRequest()) { |
| return getRemoteAddress(((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest()); |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Checks whether ip address is null, empty or unknown |
| * @param ip |
| * @return |
| */ |
| private static boolean isRemoteAddressUnknown(String ip) { |
| return ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip); |
| } |
| |
| /** |
| * Checks if ip contains multiple IP addresses |
| */ |
| private static boolean containsMultipleRemoteAddresses(String ip) { |
| return ip != null && ip.indexOf(",") > 0; |
| } |
| |
| /** |
| * Checks if RequestContextHolder contains a valid HTTP request |
| * @return |
| */ |
| private static boolean hasValidRequest() { |
| return RequestContextHolder.getRequestAttributes() != null && |
| RequestContextHolder.getRequestAttributes() instanceof ServletRequestAttributes && |
| ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest() != null; |
| } |
| |
| } |