如何过滤非法IP地址的用户发送请求

实现步骤:

1. 创建自己的RequestProcessor类,重写体重的proccessPreprocess加入所需的控制逻辑.源代码如下:

package classmate;

注意导包: commons-logging.jar

2. struts-config.xml文件配置如下:

加入:

<controller processorClass="classmate.Myrequ"/>

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.RequestProcessor;

import org.apache.struts.config.ForwardConfig;
import org.apache.commons.logging.Log;

/**
* 繼承RequestProcessor類
* @author java
*
*/
public class MyRequestProcessor extends RequestProcessor {
/**
* 無參數的構造方法
*
*/
public MyRequestProcessor() {
}
/**
* 重寫processpreprocess()方法
*/
protected boolean processPreprocess(HttpServletRequest request,
HttpServletResponse response) {

boolean continueProcessing = true;
//獲取發出請求的的客戶端IP地址
// Get the name of the remote host and log it
String remoteHost = request.getRemoteHost();
log.info("Request from host: " + remoteHost);
//判斷地址的合法性
// Make sure the host is from one that you expect
if ((remoteHost == null || !remoteHost.startsWith("127."))) {
// Not the localhost, so don't allow the host to access the site
continueProcessing = false;

try {
//跳轉到錯誤頁面
response.sendRedirect("/S02_Extend/error.jsp");
} catch (Exception ex) {
log.error("Problem sending redirect from processPreprocess()");
}
}
return continueProcessing;
}

}