/*
* TrackBackAction.java
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Author: Winter Lau
* http://dlog4j.sourceforge.net
*
*/
package com.liusoft.dlog4j.action;
import java.util.Date;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.liusoft.dlog4j.beans.TrackBackBean;
import com.liusoft.dlog4j.dao.TrackBackDAO;
import com.liusoft.dlog4j.formbean.TrackBackForm;
/**
* ���ڴ���Trackback����
* @author Winter Lau
*/
public class TrackBackAction extends Action {
/**
*
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest req, HttpServletResponse res) throws Exception
{
TrackBackForm tbf = (TrackBackForm)form;
String msg = validate(tbf);
if(msg==null){
try{
TrackBackBean tbb = new TrackBackBean();
tbb.setBlogName(tbf.getBlog_name());
tbb.setExcerpt(tbf.getExcerpt());
tbb.setParentId(tbf.getId());
tbb.setParentType(tbf.getType());
tbb.setRemoteAddr(req.getRemoteAddr());
tbb.setTitle(tbf.getTitle());
tbb.setTrackTime(new Date());
tbb.setUrl(tbf.getUrl());
TrackBackDAO.create(tbb);
}catch(Exception e){
getServlet().log("TrackBackAction.execute failed.", e);
msg = e.getMessage();
}
}
String xml = getResponse(msg!=null, msg);
res.getWriter().print(xml);
return null;
}
/**
* ��֤�������Ч��
*/
protected String validate(TrackBackForm form) {
if(StringUtils.isEmpty(form.getUrl()))
return "url is empty";
else
if(form.getId()<0)
return "Illegal value of object id";
else
if(StringUtils.isEmpty(form.getBlog_name()))
return "Blog_name is empty";
else
if(StringUtils.isEmpty(form.getTitle()))
return "Title is empty";
return null;
}
/**
* �õ�TrackBack�ķ�����Ϣ
* @param error
* @param msg
* @return
*/
protected String getResponse(boolean error, String msg){
StringBuffer xml = new StringBuffer();
xml.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
xml.append("<response>");
if(error){
xml.append("<error>1</error>");
xml.append("<message>");
xml.append(msg);
xml.append("</message>");
}
else
xml.append("<error>0</error>");
xml.append("</response>");
return xml.toString();
}
}