[Zope] How to find out the full URL

I have a page template, say 'products.pt', which takes traverse_subpath[0] as one of the variables, so e.g. the URL: http://myserver/products/100 will actually call products.pt, which get 100 from the URL and displays it in the template. Now my question is how can I get the full URL from within the tempalte 'products.pt'? If I use 'request/URL' it will show 'http://myserver/products' only, with the subpath somehow dropped. How can I get the '/100' part back? Ideally, I'd like to get back the whole URL as entered in the browser as a string. From the REQUEST I have to put together URL and QUERY_STRING, and the section (#xxx) part of the url can not be found in REQUEST. Thanks for helping. Hong Yuan