Asp Forum - Re: Bug in URI.parse?

Daniel Berger

8/29/2007 5:24:00 PM

On Aug 29, 8:33 am, "Andrew Beers" <be...@tableausoftware.com> wrote:
> I have looked through the archives for the mailing list, but didn't see
> this issue addressed. So here goes.
>
> My local machine is named 3beers-wrk. I achieved this by putting an
> entry in my local hosts file (since I'm on Windows, this would be in
> \windows\system32\drivers\etc\hosts). However, I have also seen the
> issue below reproduce with a machine whose name is similar, say
> 12345-server.
>
> Below is a capture of my session with the shell, then with irb:
>
> H:\>ping 3beers-wrk
>
> Pinging 3beers-wrk [127.0.0.1] with 32 bytes of data:
>
> Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
>
> Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
>
> ...
>
> H:\>irb
>
> irb(main):001:0> require 'uri'
>
> => true
>
> irb(main):002:0> URI.parse("http://3beers-wrk.tsi...)
>
> => #<URI::HTTP:0x1612dc0 URL:http://3beers-wrk.t...
>
> irb(main):003:0> URI.parse("http://3beers-wrk")
>
> URI::InvalidURIError: the scheme http does not accept registry part:
> 3beers-wrk (or bad hostname?)
>
> from
> c:/p4/workgroup-1.0/workgroup-support/ruby/lib/ruby/1.8/uri/generic.rb:1
> 94:in `initialize'
>
> from
> c:/p4/workgroup-1.0/workgroup-support/ruby/lib/ruby/1.8/uri/http.rb:46:i
> n `initialize'
>
> from
> c:/p4/workgroup-1.0/workgroup-support/ruby/lib/ruby/1.8/uri/common.rb:48
> 4:in `new'
>
> from
> c:/p4/workgroup-1.0/workgroup-support/ruby/lib/ruby/1.8/uri/common.rb:48
> 4:in `parse'
>
> from (irb):3
>
> from
> c:/p4/workgroup-1.0/workgroup-support/ruby/lib/ruby/1.8/uri/http.rb:57
>
> URI.parse() is not properly parsing the non-qualified name 3beers-wrk
> (though it does properly parse a fully-qualified hostname), which seems
> to be in line with the grammar set forth in RFC2396. However, the RFC
> makes the following comment: "In practice, however, the host component
> may be a local domain literal" (section 3.2). This suggests that the
> above URI is entirely valid. Further, this URI is acceptable to Web
> browsers.
>
> Is this a bug? How can I handle this seemingly valid URI?

It looks like URI.parse doesn't like the leading number:

irb(main):001:0> require 'uri'
irb(main):003:0> URI.parse("http://xshare")
=> #<URI::HTTP:0x16fd906 URL:http://xshare>
irb(main):004:0> URI.parse("http://xshare-foo")
=> #<URI::HTTP:0x16fc498 URL:http://xshare-foo>
irb(main):006:0> URI.parse("http://3qshare")
URI::InvalidURIError: the scheme http does not accept registry part:
3qshare (or bad hostname?)
from C:/ruby/lib/ruby/1.8/uri/generic.rb:195:in `initialize'
from C:/ruby/lib/ruby/1.8/uri/http.rb:78:in `initialize'
from C:/ruby/lib/ruby/1.8/uri/common.rb:488:in `new'
from C:/ruby/lib/ruby/1.8/uri/common.rb:488:in `parse'
from (irb):6

I couldn't tell you what the proper behavior is.

Regards,

Dan

comp.lang.ruby

Re: Bug in URI.parse?

Daniel Berger

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