How to detect Fragment identifiers in Url Mappings

Question

In a Grails project I'm trying to map a Url based on whether or not a Fragment Identifier is present in the Url. The Fragment Identifiers are important because a Flash library SWFAddress uses them to communicate to a Flash application present in the web page.

I simply need to determine whether a fragment is present or not in the Request url.

Should I look into HttpServletRequest to do this?

What's the best way in Grails to route a url based on whether a Fragment Identifier is present in a Url?

[I asked this same question at the Grails forum.]

Answer 1

A fragment identifier is not part of a URL, it is merely used in conjunction with a URL. It is of value only to the client.

A compliant server will ignore any fragment identifier sent by a client.

You can't design your url mappings based on fragment identifiers, the URL will not contain a fragment identifier by the time it reaches your app.