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Re: [cygstart] optional double slash after scheme for file URIs
- From: James Nylen <jnylen at gmail dot com>
- To: cygwin at cygwin dot com
- Date: Tue, 5 Aug 2014 13:21:20 -0500
- Subject: Re: [cygstart] optional double slash after scheme for file URIs
- Authentication-results: sourceware.org; auth=none
- References: <CADO7cW+aRhikCkekmGRiT5sQjS8d9wYwd3q8jRxsrV=t+fXhwg at mail dot gmail dot com>
Chrome and IE cope with these variants just fine:
file:C:/Projects
file:/C:/Projects
file://C:/Projects
file:///C:/Projects
file:////C:/Projects
IE doesn't like more than 4 slashes, but Chrome doesn't mind.
Your patch appears to only cover 0 or 2 slashes. How about something
like this instead of checking for "//":
// remove all slashes except the last one
while (strncmp(aPath, "//", 2) == 0) aPath++;
// path /C:/Projects is invalid, want C:/Projects instead
if (*aPath == '/' && *(aPath + 2) == ':') aPath++;
On Tue, Aug 5, 2014 at 1:02 PM, Juan Gabriel Ricart
<juangabriel.ricart@gmail.com> wrote:
> Greetings,
>
> Below you may find a trivial patch for the cygstart program (a part of
> the cygutils package) for your review:
>
> --- cygstart.c.old 2014-08-05 15:37:49.021062800 +0000
> +++ cygstart.c.new 2014-08-05 14:20:54.318820400 +0000
> @@ -591,8 +591,12 @@
> const wchar_t *pWinDir = NULL;
> int rc = 0;
>
> - if (strncmp (aPath, "file://", 7) == 0)
> - aPath += 7;
> + if (strncmp (aPath, "file:", 5) == 0)
> + {
> + aPath += 5;
> + if (strncmp (aPath, "//", 2) == 0)
> + aPath += 2;
> + }
> #ifdef __CYGWIN__
> /* Convert file path from POSIX to Windows, unless it looks like a URL */
> if (!strstr (aPath, "://") && strncmp (aPath, "mailto:", 7) != 0)
>
> It makes the double slash after the scheme optional for file URIs. So
> this error would not happen:
>
> $ cygstart file:/home/ricartj/page.htm
> Unable to start 'file:\home\ricartj\page.htm: The specified file was not found.
>
> The reasons for this are enumerated below:
>
> 1. Although RFC 1738 explicitly documents the double slash as
> mandatory for file URIs (see Section 5), a new working draft is being
> proposed:
>
> http://tools.ietf.org/html/draft-kerwin-file-scheme-10
>
> which makes the double slash optional (see Section 2.2).
>
> 2. Many browsers already cope with file URIs that do not contain the
> double slash, I personally tested this with Firefox and Internet
> Explorer. It would be great if cygstart could work like this as well.
>
> Best regards,
>
> --
> Juan Ricart
>
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