/*
* Copyright 1999-2017 Alibaba Group Holding Ltd.
*
* 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 com.alibaba.druid.util;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
public class DruidWebUtils {
public static String getRemoteAddr(HttpServletRequest request) {
String ip = request.getHeader("x-forwarded-for");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
private static String getContextPath_2_5(ServletContext context) {
String contextPath = context.getContextPath();
if (contextPath == null || contextPath.length() == 0) {
contextPath = "/";
}
return contextPath;
}
public static String getContextPath(ServletContext context) {
if (context.getMajorVersion() == 2 && context.getMinorVersion() < 5) {
return null;
}
try {
return getContextPath_2_5(context);
} catch (NoSuchMethodError error) {
return null;
}
}
}