iprequestprocessor.java

过滤IP地址代码

package addressbook;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.RequestProcessor;

public class IPRequestProcessor extends RequestProcessor {

	@Override
	protected boolean processPreprocess(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		boolean flag = true;
		//得到远程计算机的IP地址并记录到日志文件中
		String remoteHost=request.getRemoteHost();
		log.info("Request from host:"+remoteHost);
		
		//判断客户计算机IP地址是否合法，以127开头的表示不合法，禁止访问
		if(remoteHost ==null || remoteHost.startsWith("127.")){
			flag = false;
			try {
				response.sendRedirect("error.jsp");
			} catch (IOException e) {
				// TODO Auto-generated catch block
				log.error(remoteHost+"is invalid");
			}
		}
		return flag;
	}

}