UriInfo.getRequestUri() does not return 'Host' header from actual request

[mkarg]

For many use cases a JAX-RS applications needs to know the URI actually used by the caller. Just one example is the Location header to be returned with a 201 Created response. Unfortunately, Uri.getRequestUri() does not contain the actual URI used by the caller, but it in fact contains the base URI provided when bootstrapping Jersey. This is problematic in case where (a) bootstrapping happened using "localhost" but caller is not on the same host (so Location would contain localhost, hence resolves to the caller's machine, or (b) the server has additional aliases for external callers, so returns Location with the canonical (possible "internal") host name while the caller expects an alias - in which case the caller cannot reach the server!

IMHO this is a bug. getRequestUri() should always return the host found in the Host header, but should never return localhost.

WDYT?