001
014
015 package com.liferay.portal.struts;
016
017 import com.liferay.portal.kernel.servlet.HttpHeaders;
018 import com.liferay.portal.kernel.util.ContentTypes;
019 import com.liferay.portal.util.PortalUtil;
020
021 import java.io.PrintWriter;
022
023 import javax.servlet.http.HttpServletRequest;
024 import javax.servlet.http.HttpServletResponse;
025
026 import org.apache.struts.action.Action;
027 import org.apache.struts.action.ActionForm;
028 import org.apache.struts.action.ActionForward;
029 import org.apache.struts.action.ActionMapping;
030
031
034 public abstract class AJAXAction extends Action {
035
036 @Override
037 public ActionForward execute(
038 ActionMapping actionMapping, ActionForm actionForm,
039 HttpServletRequest request, HttpServletResponse response)
040 throws Exception {
041
042 String text = null;
043
044 try {
045 text = getText(actionMapping, actionForm, request, response);
046 }
047 catch (Exception e) {
048 PortalUtil.sendError(
049 HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e, request,
050 response);
051
052 return null;
053 }
054
055 response.setContentType(ContentTypes.TEXT_PLAIN_UTF8);
056 response.setHeader(
057 HttpHeaders.CACHE_CONTROL,
058 HttpHeaders.CACHE_CONTROL_NO_CACHE_VALUE);
059
060 PrintWriter printWriter = response.getWriter();
061
062 printWriter.write(text);
063
064 printWriter.close();
065
066 return null;
067 }
068
069 public abstract String getText(
070 ActionMapping actionMapping, ActionForm actionForm,
071 HttpServletRequest request, HttpServletResponse response)
072 throws Exception;
073
074 }