Re: Escaping links

[John Kitchin <jkitchin@andrew.cmu.edu>]

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Could you put some magic at the beginning of the string that indicates it
is encoded?

On Fri, Aug 11, 2017 at 8:15 AM Nicolas Goaziou <mail@nicolasgoaziou.fr>
wrote:

> Hello,
>
> Fabrice Popineau <fabrice.popineau@gmail.com> writes:
>
> > Are links to a file whose name already holds (url-)escaped chars
> supported?
> >
> > If I have a directory named "c:/temp/foo bar/"
> > and files in this directory named
> > foo.txt
> > foo bar.txt
> > foo%2Fbar.txt
> >
> > I can create links in an Org buffer by using `insert' but I find the
> > situation a bit confusing.
> >
> > #+LINK: temp file:c:/temp/%s
> >
> > 1. [[temp:foo bar/foo bar.txt]]
> > 2. [[temp:foo%20bar/foo bar.txt]]
> > 3. [[temp:foo bar/foo%20bar.txt]]
> > 4. [[temp:foo%20bar/foo%20bar.txt]]
> >
> >
> > All of these links seem to work the same way.
> >
> > 5. [[temp:foo bar/foo%2Fbar.txt]]
> > 6. [[temp:foo bar/foo%252Fbar.txt]]
> > 7. [[temp:foo%20bar/foo%252Fbar.txt]]
> >
> > Link 5 does not work.
> >
> > Link 6 and 7 do work: as long as I press enter on the link, I visit the
> > file.
> >
> > Unfortunately, if I edit these links with 'C-c C-l', doing nothing
> > (return), Org replaces the escaped chars and unescape them.
> >
> > I have grabbed files whose name hold such %2F %3A and so on escaped
> chars.
> > Do I have any option to make a link point at them or should I rename
> > them?
>
> You might get around it by not using link abbreviation.
>
> Anyway, the core problem here is that:
>
>   1. Org uses percent escaping to get around its own limitations (e.g., no
>      square brackets allowed in a link);
>   2. it's not possible to know if a string is percent-encoded or not;
>   3. percent-encoding is not idempotent.
>
> Using a different escaping mechanism to solve 1 and never ever
> percent-decode an URL could put an end to the link mess.
>
> Finding an escaping mechanism that also solves 2 is yet to be done.
>
>
> Regards,
>
> --
> Nicolas Goaziou
>
> --
John

-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu

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