How can a servlet determine the exact requesting URL

This seems like a simple question, but I cannot find a solution. I am wondering how a servlet can determine the exact requesting URL that invoked the servlet. Specifically, I am having trouble making my servlet determine if the port number was specified or not. I am using session tracking, and my web server (by default) produces two separate sessions when hitting https://myserver.com/myservlet and https://myserver.com:443/myservlet.
I have tried to use the HttpUtils.getRequestURL(), but this function seems to assume that if you used https over port 443, that you DID NOT specify 443 in the URL.
SV

If your servlet container implements servlet 2.2 or better, try the request.getRequestURL() method. It should return everything that was originally entered for the request address at the client except the query string (use request.getQueryString() to get that).
I am not sure how it handles the port number for specifically entered vs not specifically entered.

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