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How to produce rendered output from a Sling POST in AEM?

It seems like Sling expects every form POST to modify the JCR. So the expected/standard behavior would be a POST-redirect-GET, which is fine for most things. However, I need to be able to POST to AEM and then use the data in that POST to create a rendered result. Our use of AEM is stateless and so I don't want to carry the POST'd data in Session in order to utilize it in a subsequent GET.

Some have recommended putting the POST'd data in Browser sessionStorage, but that doesn't have broad enough support to be sufficient.

As far as I can tell there is no way for Sling in AEM to take a POST and produce a rendered result.

Here is a screenshot of what a POST produces in the page/resourceType component and in any Sling included jsp's that happen to be involved in the rendering.

enter image description here

I have tried things like using the "nop" operation.

<input type="hidden" name=":operation" value="nop" />

But either way all servlets think a POST is happening and don't render properly.

There is the option of creating a custom servlet, to handle the POST, but then how do you render the templated output and change the request so that all the components think they are serving a GET?

UPDATED: Here is a screenshot of the "nop" POST.jsp result. enter image description here

Solution

  • What you can do is create a POST.jsp file in the appropiate resourceType.

    If your POST request go to /content/yourapp/something, which has a resourceType: your/app/example. Then you can create a file /apps/your/app/example/POST.jsp with whatever render you wish. You can even include your default rendering script in the POST.jsp file if you need it to be rendered the same as the GET requests.

    The other option is to use a servlet registered for POST requests and internally use the SlingRequestProcessor service. That service allow you to programmatically process a request through Sling. You can use a SlingRequestWrapper to wrap your request and override getMethod() to return "GET". That should process the request as if it was a GET request.