GNU bug report logs - #60528
uri->string swallows mandatory slashes

Previous Next

To reply to this bug, email your comments to 60528 AT debbugs.gnu.org.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Liliana Marie Prikler <liliana.prikler <at> gmail.com>
To: bug-guile <at> gnu.org
Subject: uri->string swallows mandatory slashes
Date: Tue, 03 Jan 2023 21:00:48 +0100

Hi folks,

Below some unexpected behaviour observed in Guile 3.0.8, but it also
dates back to 2.2.7 and possibly earlier versions.

scheme@(guile-user)> ,use (web uri)
scheme@(guile-user)> (string->uri "file:///home") 
$1 = #<<uri> scheme: file userinfo: #f host: #f port: #f path: "/home"
query: #f fragment: #f>
scheme@(guile-user)> (uri->string $1)
$2 = "file:/home"
scheme@(guile-user)> (uri->string (build-uri 'file #:host "" #:path
"/home")) 
ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Throw to key `uri-error' with args `("Expected valid host: ~s" (""))'.

Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.

Cheers

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: <tomas <at> tuxteam.de>
To: bug-guile <at> gnu.org
Subject: Re: bug#60528: uri->string swallows mandatory slashes
Date: Wed, 4 Jan 2023 09:11:10 +0100

[Message part 1 (text/plain, inline)]

On Tue, Jan 03, 2023 at 09:00:48PM +0100, Liliana Marie Prikler wrote:
> Hi folks,
> 
> Below some unexpected behaviour observed in Guile 3.0.8, but it also
> dates back to 2.2.7 and possibly earlier versions.
> 
> scheme@(guile-user)> ,use (web uri)
> scheme@(guile-user)> (string->uri "file:///home") 
> $1 = #<<uri> scheme: file userinfo: #f host: #f port: #f path: "/home"
> query: #f fragment: #f>
> scheme@(guile-user)> (uri->string $1)
> $2 = "file:/home"

This looks strange, but not necessarily wrong. "file:///home" means
"empty authority", equivalent to "localhost" whereas "file:/home" means
"no authority". I'd expect the library to keep those two separate.
 
> scheme@(guile-user)> (uri->string (build-uri 'file #:host "" #:path
> "/home")) 
> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
> Throw to key `uri-error' with args `("Expected valid host: ~s" (""))'.

Note that "no host" is not the empty string, but #f:

> scheme@(guile-user)> (uri->string (build-uri 'file #:host "" #:path
> "/home")) 

  scheme@(guile-user)> (uri->string (build-uri 'file #:host #f #:path "/home"))
  $6 = "file:/home"

So it is consistent, albeit (to me) surprising. I'd have expect
your `$2' above to be "file:///home", with three slashes.

Cheers
-- 
t

[signature.asc (application/pgp-signature, inline)]

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.