101      阿裏雲  技術社區[雲棲]

從http協議中獲得客戶端ip

import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;

public final class InternetProtocol {
private static Logger log = Logger.getLogger(InternetProtocol.class);
/**
* 構造函數.
*/
private InternetProtocol() {
}

/**
 * 獲取客戶端IP地址.<br>
 * 支持多級反向代理
 * 
 * @param request
 *            HttpServletRequest
 * @return 客戶端真實IP地址
 */
public static String getRemoteAddr(final HttpServletRequest request) {
    try{
        String remoteAddr = request.getHeader("X-Forwarded-For");
        // 如果通過多級反向代理，X-Forwarded-For的值不止一個，而是一串用逗號分隔的IP值，此時取X-Forwarded-For中第一個非unknown的有效IP字符串
        if (isEffective(remoteAddr) && (remoteAddr.indexOf(",") > -1)) {
            String[] array = remoteAddr.split(",");
            for (String element : array) {
                if (isEffective(element)) {
                    remoteAddr = element;
                    break;
                }
            }
        }
        if (!isEffective(remoteAddr)) {
            remoteAddr = request.getHeader("X-Real-IP");
        }
        if (!isEffective(remoteAddr)) {
            remoteAddr = request.getRemoteAddr();
        }
        return remoteAddr;
    }catch(Exception e){
        log.error("get romote ip error,error message:"+e.getMessage());
        return "";
    }
}

/**
 * 獲取客戶端源端口
 * @param request
 * @return
 */
public static Long getRemotePort(final HttpServletRequest request){
    try{
        String port = request.getHeader("remote-port");
        if( StringUtil.isNotEmptyString(port )) {
            try{
                return Long.parseLong(port);
            }catch(NumberFormatException ex){
                log.error("convert port to long error , port:   "+port);
                return 0l;
            }
        }else{
            return 0l;
        }       
    }catch(Exception e){
        log.error("get romote port error,error message:"+e.getMessage());
        return 0l;
    }
}

/**
 * 遠程地址是否有效.
 * 
 * @param remoteAddr
 *            遠程地址
 * @return true代表遠程地址有效，false代表遠程地址無效
 */
private static boolean isEffective(final String remoteAddr) {
    boolean isEffective = false;
    if ((null != remoteAddr) && (!"".equals(remoteAddr.trim()))
            && (!"unknown".equalsIgnoreCase(remoteAddr.trim()))) {
        isEffective = true;
    }
    return isEffective;
}

}

最後更新：2017-06-05 16:01:45

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