Question

I am developing a grails application which uses lot of ajax.If the request is ajax call then it should give response(this part is working), however if I type in the URL in the browser it should take me to the home/index page instead of the requested page.Below is the sample gsp code for ajax call.

<g:remoteFunction action='list' controller='todo' update='todo-ajax'>  <div id ='todo-ajax'> //ajax call rendered in this area </div> 

if we type http://localhost:8080/Dash/todo/list in the browser URL bar, the controller should redirect to http://localhost:8080/Dash/auth/index

How to validate this in controller.

Answer 1

It’s quite a common practice to add this dynamic method in your BootStrap.init closure:

    HttpServletRequest.metaClass.isXhr = {->          'XMLHttpRequest' == delegate.getHeader('X-Requested-With')     } 

this allows you to test if the current request is an ajax call by doing:

if(request.xhr) { ... } 

The simplest solution is to add something like this to your todo action:

if(!request.xhr) {      redirect(controller: 'auth', action: 'index')     return false } 

You could also use filters/interceptors. I’ve built a solution where I annotated all actions that are ajax-only with a custom annotation, and then validated this in a filter.

Full example of grails-app/conf/BootStrap.groovy:

import javax.servlet.http.HttpServletRequest  class BootStrap {       def init = { servletContext ->          HttpServletRequest.metaClass.isXhr = {->             'XMLHttpRequest' == delegate.getHeader('X-Requested-With')         }       }      def destroy = {      } }