From: Morgan Cheng <morgan.chengmo@...>
Date: 2007-06-05T16:40:11+09:00
Subject: Re: URI class bug?

On Jun 5, 3:00 pm, "Jano Svitok" <jan.svi...@gmail.com> wrote:
> On 6/5/07, Morgan Cheng <morgan.chen...@gmail.com> wrote:
>
> > I am using Ruby 1.8.6. I found URI cannot parse URI with "_" is host.
>
> > uri = "http://dr_gabriele.podomatic.com/enclosure/
> > 2006-08-03T15_09_59-07_00.m4v"
> > URI.parse(uri)
>
> > Is there any way to work around that?
> > thanks
>
> It seems underscores are not allowed in host part of an URI. So it's
> not a bug. See RFC 2396 (URI),  and 1035 (DNS). If you really want it,
> you can open the class and redefine some of the methods and/or
> manually edit URI sources.


In RFC 2396, "_" is taken as "Unreserved Characters".
   Unreserved characters can be escaped without changing the semantics
   of the URI, but this should not be done unless the URI is being
used
   in a context that does not allow the unescaped character to appear.

However, URI.escape doesn't escape "_".

require 'URI'
original_uri = "http://dr_gabriele.podomatic.com/enclosure/"
uri = URI.escape(original_uri)
puts uri == original_uri