GNU bug report logs - #1020
url-expand-file-name expands wrongly on Windows

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Klaus Straubinger <KSNetz <at> UseNet.ArcorNews.DE>
To: bug-gnu-emacs <at> gnu.org
Subject: url-expand-file-name expands wrongly on Windows
Date: Wed, 24 Sep 2008 14:19:34 +0200 ()

In GNU Emacs 22.3.1 (i386-mingw-nt5.1.2600)
 of 2008-09-06 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4)'

the problem described in
<http://lists.gnu.org/archive/html/bug-gnu-emacs/2008-03/msg00123.html>
still occurs.

  (url-expand-file-name "test" ["http" nil nil "www.gnu.org" 80 "/" nil nil t])

  --> "http://www.gnu.org/c:/test";


  (url-http-expand-file-name
   [nil nil nil nil nil "test" nil nil nil]
   ["http" nil nil "www.gnu.org" 80 "/" nil nil t])

  --> "/c:/test"

url-http-expand-file-name is an alias for url-default-expander; this
could be changed.

But currently the function url-default-expander calls the function
expand-file-name while canonicalizing URLs. This is not a good idea on
Windows because there the drive letter will be inserted.

Message #14 received at 1020 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: "Juanma Barranquero" <lekktu <at> gmail.com>
To: "Stefan Monnier" <monnier <at> iro.umontreal.ca>
Cc: "Klaus Straubinger" <KSNetz <at> usenet.arcornews.de>,
        1020 <at> debbugs.gnu.org
Subject: Re: url-default-expander expands wrongly on Windows
Date: Tue, 13 Jan 2009 03:09:00 +0100

On Thu, Mar 27, 2008 at 14:54, Stefan Monnier <monnier <at> iro.umontreal.ca> wrote:

>> the function url-default-expander calls expand-file-name which
>> inserts interesting but wrong drive letters into URLs when called
>> on Windows.
>
> Can you show an example so as to help us understand the problem?

ELISP> (url-expand-file-name "test" "http://www.gnu.org/")
"http://www.gnu.org/c:/test"
ELISP> (url-expand-file-name "test" "http://www.gnu.org")
"http://www.gnu.org/c:/emacs/lisp/url/test"
ELISP> (url-expand-file-name "/test" "http://www.gnu.org/")
"http://www.gnu.org/test"
ELISP> (url-expand-file-name "/test" "http://www.gnu.org")
"http://www.gnu.org/test"


    Juanma

Message #19 received at 1020-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Jason Rumney <jasonr <at> gnu.org>
To: Juanma Barranquero <lekktu <at> gmail.com>,
        1020-done <at> debbugs.gnu.org
Cc: Klaus Straubinger <KSNetz <at> usenet.arcornews.de>
Subject: Re: bug#1020: url-default-expander expands wrongly on Windows
Date: Sat, 21 Feb 2009 16:00:03 +0800

Juanma Barranquero wrote:
>>> the function url-default-expander calls expand-file-name which
>>> inserts interesting but wrong drive letters into URLs when called
>>> on Windows.
>>>       
> ELISP> (url-expand-file-name "test" "http://www.gnu.org/")
> "http://www.gnu.org/c:/test"
> ELISP> (url-expand-file-name "test" "http://www.gnu.org")
> "http://www.gnu.org/c:/emacs/lisp/url/test"
> ELISP> (url-expand-file-name "/test" "http://www.gnu.org/")
> "http://www.gnu.org/test"
> ELISP> (url-expand-file-name "/test" "http://www.gnu.org")
> "http://www.gnu.org/test"
>   

I have changed url-default-expand to use concat instead of 
expand-file-name to avoid this bug.

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