Question

I want to know the difference between

PortalUtil.getOriginalServletRequest(portletRequest) 

and

PortalUtil.getHttpServletRequest(portletRequest).

Answer 1

Looking at the source code for Liferay 6 (I’m assuming your’re talking about 6) you can see what PortalUtil.getOriginalServletRequest does and I’ve placed the code below:

public HttpServletRequest getOriginalServletRequest(
    HttpServletRequest request) {

    HttpServletRequest originalRequest = request;

    while (originalRequest.getClass().getName().startsWith(
                "com.liferay.")) {

        // Get original request so that portlets inside portlets render
        // properly

        originalRequest = (HttpServletRequest)
            ((HttpServletRequestWrapper)originalRequest).getRequest();
    }

    return originalRequest;
}

So as the comment says, “Get original request so that the portlets inside portlets render properly”. You’ll probably only require this for a nested portlet situation or similar. Most of the time you will just need to use:

PortalUtil.getHttpServletRequest(portletRequest);

I hope this helps!