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Re: Problems and Opportunities at purl.org

From: Shane McCarron <shane@aptest.com>
Date: Mon, 29 Feb 2016 11:45:40 -0600
Message-ID: <CAOk_reH3A+Utw6fUbpvw6dg9ka6RtOW_43Ykn-Na9F3BeTg0Sw@mail.gmail.com>
To: Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>
Cc: Pemanent Identifier CG <public-perma-id@w3.org>
In general I don't *hate* the idea if permitting the use of CSV files to
drive the creation / updating of the .htaccess files.  But I would prefer
this to be an option.  I think my mental model was that this was a one time
migration from purl.org - after that we would just use .htaccess files as
we have been.  But I appreciate the thought that this might be overly
onerous for some significant number of potential users.  Editing those
things is not for the meek!

What would people think about a rule set like:

1. If there is a .htaccess file in a directory, that file can have sections
in it that are demarked and will never be automatically modified.
2. If there is a rules.csv file in a directory, that file contains mapping
rules that will update the (non-demarked) parts of the .htaccess file in
the directory (creating the file if necessary)

I haven't tried to implement this sort of github post-push processing magic
on branches / pull requests before.  Is that even possible?


On Mon, Feb 29, 2016 at 11:32 AM, Stian Soiland-Reyes <
soiland-reyes@cs.manchester.ac.uk> wrote:

> On 29 February 2016 at 16:35, Shane McCarron <shane@aptest.com> wrote:
> > The only downside to a huge top level .htaccess is the difficulty of
> editing
> > / maintaining it.  Otherwise I am not concerned.  Apache .htaccess
> > processing is efficient enough for these purposes imho.
>
> I guess you meant to reply to the list, so I've CCed it in.
>
> Another issue then is if we are to allow editing a CSV file to
> re-generate .htaccess (rather than a one-off move), then we have to
> extra careful that there aren't any other modifications to the
> top-level .htaccess.
>
> I was picturing we could move to a model where you have a folder, like
> let's look at
> https://github.com/perma-id/w3id.org/blob/master/cwl/
> then instead of the current .htaccess there, you could have a CSV file like
>
> https://gist.github.com/stain/c2d668b11b66948b5991
>
> It should be quite easy to generate the corresponding .htaccess from
> such files - they can have some headers to warn you:
>
> ## DO NOT EDIT
> RewriteEngine On
> ## END DO NOT EDIT
>
>
> I think we can still do regular expressions, if they start with ^ -
> which I think is fair enough)
>
> and the src paths are relative to the folder you are in, so on that
> example the one with "context" in src basically means
> https://w3id.org/cwl/context
>
> Special case then is for the folder itself, so either . or empty string.
>
>
>
>
> The Very Advanced Edition can allow full paths like /cwl/context  -
> where the prefix from the current directory MUST match.  (or we can
> say this is the required format, even).  This does however not work on
> the regular expression side - as RewriteRules in a folder are relative
> to their location (naturally). It's probably better to have a limited
> number of options, so it's easy to validate the CSV files before
> trying to generate the .htaccess.
>
>
>
> > On Mon, Feb 29, 2016 at 10:04 AM, Stian Soiland-Reyes
> > <soiland-reyes@cs.manchester.ac.uk> wrote:
> >>
> >> I started
> >> https://github.com/stain/w3id-csv
> >>
> >> it's quite simple start.. but it uses a CSV file like
> >>
> >> https://github.com/stain/w3id-csv/blob/master/purl_example.csv
> >> which matches the schema David Wood mentioned.
> >>
> >> and then generates a bunch of .htaccess files.
> >>
> >> You can test it on a dummy install of Apache httpd with Docker - see the
> >> README.
> >>
> >>
> >> Obviously now this script is quite naive in that it makes a folder for
> >> every purl.org entry, which (in addition to making loads of files)
> >> would be a bit wrong (e.g. the purl /fred/soup.html  would make the
> >> fred/soup.html/.htaccess which would mean an intermediate HTTP
> >> redirect from soup.html to soup.html/  -- and I've not gone through
> >> the different types yet to do subtree matching or the correct HTTP
> >> redirection status code.
> >>
> >> So one simple improvement would be to check if the path ends with a /
> >> in purl.org or not - and then group those entries within the parent
> >> path so there would be a bigger .htaccess.  However I think we want to
> >> avoid a single large top-level .htaccess for registrations like
> >> http://purl.org/pav  without a trailing / ?
> >>
> >>
> >> As for conflicts this should be modified to only replace it's "own"
> >> files by having a magic "#header".
> >>
> >> We also talked about having a "native" CSV file approach for w3id.org
> >> - so this could be modified then to have a better file format that we
> >> can convert the purl.org dump into.
> >>
> >>
> >>
> >>
> >> On 29 February 2016 at 12:29, Stian Soiland-Reyes
> >> <soiland-reyes@cs.manchester.ac.uk> wrote:
> >> > Yeah, let's get this going.
> >> >
> >> > So looking at the purl database schema we don't really need the group
> >> > and user stuff to start with (although that could be added to the
> >> > README).
> >> >
> >> > the purls table itself should be sufficient to start. We can find the
> >> > different "type" values in the purl.org source code I think?
> >> >
> >> >
> >> >
> >> > On 29 February 2016 at 11:58, Norman Gray <norman@astro.gla.ac.uk>
> >> > wrote:
> >> >>
> >> >> Greetings, all.
> >> >>
> >> >> A little while ago (and this message is a reply to
> >> >>
> >> >> <
> https://lists.w3.org/Archives/Public/public-perma-id/2015Dec/0001.html>,
> to
> >> >> resuscitate the thread), there was some interest expressed in a
> >> >> purl.org
> >> >> successor.  That thread ended on a positive note, with David Wood and
> >> >> some
> >> >> others having access to the schema, and OCLC apparently keen on
> passing
> >> >> forward the current repository.
> >> >>
> >> >> I was asked about purl.org by a colleague today, and this reminded
> me
> >> >> about
> >> >> last November/December's thread: is there any news about purl.org or
> >> >> the
> >> >> broader preservation plan, that can be passed on?  Or is there any
> way
> >> >> that
> >> >> I or others could help with this?
> >> >>
> >> >>
> >> >> All the best,
> >> >>
> >> >> Norman
> >> >>
> >> >>
> >> >> --
> >> >> Norman Gray  :  https://nxg.me.uk
> >> >> SUPA School of Physics and Astronomy, University of Glasgow, UK
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > Stian Soiland-Reyes, eScience Lab
> >> > School of Computer Science
> >> > The University of Manchester
> >> > http://soiland-reyes.com/stian/work/
> >> > http://orcid.org/0000-0001-9842-9718
> >>
> >>
> >>
> >> --
> >> Stian Soiland-Reyes, eScience Lab
> >> School of Computer Science
> >> The University of Manchester
> >> http://soiland-reyes.com/stian/work/
> >> http://orcid.org/0000-0001-9842-9718
> >>
> >
> >
> >
> > --
> > Shane McCarron
> > Managing Director, Applied Testing and Technology, Inc.
>
>
>
> --
> Stian Soiland-Reyes, eScience Lab
> School of Computer Science
> The University of Manchester
> http://soiland-reyes.com/stian/work/
> http://orcid.org/0000-0001-9842-9718
>



-- 
Shane McCarron
Managing Director, Applied Testing and Technology, Inc.
Received on Monday, 29 February 2016 17:46:11 UTC

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