Package de.xima.fc.servlet

Class KeepAliveServlet

  • All Implemented Interfaces:
    Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig
    @WebServlet(name="KeepAliveServlet",
            urlPatterns="/form/includes/extra/keep-alive",
            asyncSupported=true)
public class KeepAliveServlet
extends javax.servlet.http.HttpServlet
    Generic servlet for keeping a session alive
    Since:
    6.6.8
    Author:
    XIMA Media GmbH
    See Also:
    Serialized Form

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected void doGet​(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
      Handles GET requests to keep the HTTP session alive and refresh form tracking when a form request ID is provided.
      protected void doOptions​(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
      Handles OPTIONS requests to set CORS headers.
      protected void doPost​(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
      Handles POST requests to keep the form session alive or to stop tracking.

      • Methods inherited from class javax.servlet.http.HttpServlet

        doDelete, doHead, doPut, doTrace, getLastModified, service, service

      • Methods inherited from class javax.servlet.GenericServlet

        destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

    • Constructor Detail

      • KeepAliveServlet

        public KeepAliveServlet()

    • Method Detail

      • doOptions

        protected void doOptions​(javax.servlet.http.HttpServletRequest req,
                         javax.servlet.http.HttpServletResponse resp)
                  throws javax.servlet.ServletException,
                         IOException
        Handles OPTIONS requests to set CORS headers. Responds with a 200 OK status.
        Overrides:
        doOptions in class javax.servlet.http.HttpServlet
        Parameters:
        req - The HTTP request.
        resp - The HTTP response.
        Throws:
        javax.servlet.ServletException - If an input or output error occurs while the servlet is handling the OPTIONS request.
        IOException - If the request for the OPTIONS could not be handled.

      • doGet

        protected void doGet​(javax.servlet.http.HttpServletRequest req,
                     javax.servlet.http.HttpServletResponse resp)
              throws javax.servlet.ServletException,
                     IOException
        Handles GET requests to keep the HTTP session alive and refresh form tracking when a form request ID is provided.
        Overrides:
        doGet in class javax.servlet.http.HttpServlet
        Parameters:
        req - The HTTP request.
        resp - The HTTP response.
        Throws:
        javax.servlet.ServletException - If an input or output error occurs while the servlet is handling the GET request.
        IOException - If the request for the GET could not be handled.

      • doPost

        protected void doPost​(javax.servlet.http.HttpServletRequest req,
                      javax.servlet.http.HttpServletResponse resp)
               throws IOException
        Handles POST requests to keep the form session alive or to stop tracking. Responds with a JSON object indicating the status.
        Overrides:
        doPost in class javax.servlet.http.HttpServlet
        Parameters:
        req - The HTTP request.
        resp - The HTTP response.
        Throws:
        IOException - If an input or output error occurs while the servlet is handling the POST request.