[Koha-bugs] [Bug 31042] OVERRIDE_SYSPREF does not work for REST API

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=31042

--- Comment #2 from David Cook <dcook at prosentient.com.au> ---
That's very interesting. 

I thought maybe the problem was with RequestHeader/RewriteRule not mixing, but
the issue exists for both http://localhost:8081/api/v1/patrons and
http://localhost:8081/api/v1/app.pl/api/v1/patrons 

When I dump out the variables from Koha/Middleware/SetEnv.pm I see the data
coming through for both the mainpage.pl and the API:

'HTTP_X_KOHA_SETENV' => 'OVERRIDE_SYSPREF_Foo Bar',

When I dump %ENV for mainpage.pl, I see lots of HTTP_X headers including:
'HTTP_X_KOHA_SETENV' => 'OVERRIDE_SYSPREF_Foo Bar',

When I dump %ENV for API, I don't see any HTTP_X headers... which look like
they're just the environmental variables Starman started with...

Yep... you need to access the Plack/PSGI-level environmental variables in
Mojo::Server::PSGI using $c->req->env. 

Plack::App::CGIBin uses Plack::App::WrapCGI which resets the %ENV variables at
this line:
https://metacpan.org/dist/Plack/source/lib/Plack/App/WrapCGI.pm#L48

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