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POPortlet: Forward a ResourceRequest to show the full portal
 

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    <p>my intention is to process a ResourceRequest that serves a resource (A dinamically generated PDF). If something goes wrong generating this file, the whole portal with a failure message in the portlet should be rendered.</p> <p>Is it possible to forward a ResourceRequest to a request that renders the complete portal? I am also considering a redirect, but I will like to be able to pass some attributes/parameters along.</p> <p>I hope I explained my problem clear enough. Thank you. </p> <p>Related/Duplicate: <a href="https://stackoverflow.com/questions/17870593/how-to-make-the-resourceresponse-to-forward-the-request-to-error-page-in-liferay">How to make the ResourceResponse to forward the request to error page in liferay portlet</a></p> <h1>Example</h1> <p>This is an example that works and does something similar to what I want to achieve. I uses the utility class <code>SessionErrors</code> of Liferay: The <code>serveResource()</code> saves an object in the session and does a redirection to a render URL. The <code>doView()</code> method is called during the subsequent request and can read the contents saved in the session.</p> <pre class="lang-java prettyprint-override"><code>import com.liferay.portal.kernel.servlet.SessionErrors; import javax.portlet.GenericPortlet; import javax.portlet.RenderRequest; import javax.portlet.RenderResponse; import javax.portlet.ResourceRequest; import javax.portlet.ResourceResponse; import javax.portlet.PortletException; import javax.portlet.PortletException; import javax.portlet.PortletRequestDispatcher; public class ResourceRequestForwardPortlet extends GenericPortlet { public void serveResource(ResourceRequest request, ResourceResponse response) throws PortletException, IOException { SessionErrors.add(resourceRequest, "resourcerequest.error", "ERROR " + errorText); resourceResponse.setProperty(ResourceResponse.HTTP_STATUS_CODE, "302"); resourceResponse.addProperty("Location", resourceResponse.createRenderURL().toString()); } public void doView(RenderRequest renderRequest, RenderResponse renderResponse) throws IOException, PortletException { String error = (String)SessionErrors.get(renderRequest, "resourcerequest.error"); SessionErrors.clear(renderRequest); renderRequest.setAttribute("errorMsg", error); PortletRequestDispatcher portletRequestDispatcher = getPortletContext().getRequestDispatcher("view.jsp"); include(viewTemplate, renderRequest, renderResponse); portletRequestDispatcher.include(renderRequest, renderResponse); } } </code></pre> <p>What I want to achieve is the same, but preventing the browser from doing two requests. For that, I would like to do a forward and I should write the error message as a request attribute. </p> <p>I uploaded a project with this example to GitHub: <a href="https://github.com/adrianrm/poc-forward-portlet/tree/master/src/main/java/arm/requestforward" rel="nofollow noreferrer">https://github.com/adrianrm/poc-forward-portlet/tree/master/src/main/java/arm/requestforward</a></p>
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    1. USAdrianRM
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    1. CODid you manage to find a solution?
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      1. USMaciej Ziarko
    2. CONothing. I think we used a workaround in which an ActionRequest is sent, and, if successful, the shown page triggers the download with Javascript.
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      1. POPortlet: Forward a ResourceRequest to show the full portal
      1. USAdrianRM
    3. CO`ResourceRequest` is used mostly with ajax. So to refresh the whole portal is not the job of `ResourceRequest`, at best you can display a failure message in your portlet through ajax if that is what you want to do. Or else you can return some flag to trigger a refresh on the whole portal through javascript.
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      1. POPortlet: Forward a ResourceRequest to show the full portal
      1. USPrakash K
 

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