myrequestprocessor.java

《struts入门教程》的源代码part1（公两部分）

package classmate;

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;


public class MyRequestProcessor extends RequestProcessor {
	
	public MyRequestProcessor() {}
	
protected boolean processPreprocess( HttpServletRequest request,
                                     HttpServletResponse response ){
 
  boolean continueProcessing = true;
 
  // Get the name of the remote host and log it
  String remoteHost = request.getRemoteHost(  );
  log.info( "Request from host: " + remoteHost );
 
  // 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{
       response.sendRedirect( "/S02_Extend/error.jsp");
     }catch( Exception ex ){
       log.error("Problem sending redirect from processPreprocess()") ;
     }
  }
  return continueProcessing;
}

}