passenger config values do not accept Nginx variables

[nikolay]

passenger_env_var VAR $nginx_var; sets VAR to $nginx_var, not its value.

[OnixGH]

Does it work when you remove VAR?

[nikolay]

@FooBarWidget @OnixGH It's not an optional parameter. I'm using init_by_lua_block to set some global variables during Nginx start (not set per request), but it doesn't seem to work even with globals.

[phoenixgao]

does this have any update? We definitely need it...

I can't even pass

passenger_env_var DOMAIN ${host};

[CamJN]

I can confirm that this doesn't work. Leaving it as an enhancement request.

[leguminator]

Labelled as Enhancement... What a joke ! Do you realize that evaluating a variable is some computer science basic feature ?

Please can you reconsider your point of view ?

[CamJN]

I do realize that it's a fairly basic enhancement. But I also realize that a business has to have priorities. However you are free to open a pull request to add the functionality if you like.

[dannykopping]

@CamJN could you point me in the right direction? I've submitted an issue for this same problem (https://github.com/phusion/passenger/issues/2024). I really need this feature to solve a critical business problem.

[CamJN]

@dannykopping If you want to work on this then you can look at src/nginx_module/ngx_http_passenger_module.c and https://www.nginx.com/resources/wiki/extending/api/variables/ to get started.

[thotypous]

This issue blocks implementation of Shibboleth authentication in a secure way, as recommended by nginx-http-shibboleth's maintainer.

Currently, it is only possible to implement it using shib_request_use_headers, which is prone to header spoofing if misconfigured or e.g. if after an update omniauth suddenly decides to start using a new header which is not filtered.

[ajaya]

@CamJN Hola. Need this for another client.