Re: [libreoffice-website] Fixing broken links for previous LibreOffice releases

On Fri, 22 Mar 2019 at 18:12:33 +0100, William Gathoye wrote:
> On 3/22/19 3:55 PM, Guilhem Moulin wrote:
> > Assuming a point in the future where 6.1.5, 6.2.1, and testing/6.2.2 are
> > no longer served by the mirror network, but stable/6.2.2 still is:
> >
> >  curl -sw"%{http_code} %{redirect_url}\\n" \
> >      -o/dev/null 
> > https://download.documentfoundation.org/libreoffice/stable/6.2.2/win/x86/LibreOffice_6.2.2_Win_x86.msi
> >  \
> [...]
> >  302 
> > https://downloadarchive.documentfoundation.org/libreoffice/old/6.2.2.2/win/x86/LibreOffice_6.2.2.2_Win_x86.msi
>
> Ok so the redirection seems to be transparent then? The
> download.documentfoundation.org links won't change and everything (the
> 302) will be handled server-side.

As the command output suggests, yes.  Or at least that's what I propose,
assuming releng accept to maintain that map.

> > This was brought up during the Dec 2018 infra call, and rejected.  See
> > the minutes for the discussion.
>
> From my understanding, the reason hasn't be provided [1] but Cloph
> only said this is already available if we do a request against the
> check server (update.libreoffice.org) using a fake user agent.

Depends what “this” refers to.  There is no dictionary mapping
‘fresh’/‘still’ to download urls, let alone a 3XY redirect.  But if you
provide your build and a more recent version is available for that
flavor, you get some information about that update, incl. its build ID
and version number

> I haven't been able to verify this assumption with the following command:
>
> curl -A "some random user agent" -L http://update.libreoffice.org

Fake doesn't mean you can chose whatever you want :-P  But fair enough
the minutes don't mention the right User-Agent header value.  You need
to perform the queries made by your LibreOffice program, for instance

    GET /check.php HTTP/2
    Host: update.libreoffice.org
    User-Agent: LibreOffice 6.0.7.3 (dc89aa7a9eabfd848af146d5086077aeed2ae4a5; Windows; x86; )

Then select with XPATH ‘/inst:description/inst:version’ to retrieve the
version number to update to.  Or with a one-liner:

    curl -sSA "LibreOffice 6.0.7.3 (dc89aa7a9eabfd848af146d5086077aeed2ae4a5; Windows; x86; )" \
        https://update.libreoffice.org/check.php | xmlstarlet sel -T -t -v 
'/inst:description/inst:version'

(though you'll want to ensure that the output has a valid XML
description).  There is also an update URL (XPATH ‘/inst:description/inst:update/@src’)
but I suppose that's not what you want, because that (intentionally) links to
https://www.libreoffice.org/download not https://download.documentfoundation.org .

-- 
Guilhem.

-- 
To unsubscribe e-mail to: website+unsubscribe@global.libreoffice.org
Problems? https://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/
Posting guidelines + more: https://wiki.documentfoundation.org/Netiquette
List archive: https://listarchives.libreoffice.org/global/website/
Privacy Policy: https://www.documentfoundation.org/privacy