Possibility to run a shell command

[concatime]

Hi. It would be really useful if we were able to execute a shell command and return the output. I don't think it's possible right now, not at my knowledge at least.
Thank you.

[maximkonovalov]

Hello,

could you please clarify what do you mean? An example will be perfect.

Thanks,

Maxim

[concatime]

For example, something like this:

function ssl_vers(req, res) {
  return os.exec("/usr/local/bin/openssl version");
}

and

js_include http.js;
js_set $ssl_vers ssl_vers;
server {
    listen 8000;
    location /ssl_vers {
        return 200 $ssl_vers;
    }
}

[maximkonovalov]

Issam,

Thanks for clarification. Unfortunately I must confirm that this is no-go simple because njs is intended to be a supplementary tool for njs code development that runs inside nginx. And nginx won't be able to run external programs for any foreseeable future.

[concatime]

Well, thank you for having at least considered my request. I totally understand your point.

[Swanty]

Issam,

Thanks for clarification. Unfortunately I must confirm that this is no-go simple because njs is intended to be a supplementary tool for njs code development that runs inside nginx. And nginx won't be able to run external programs for any foreseeable future.

Is this still the case? There is a lot of limitations if we can't execute shell commands, for example fs.mkdirSync doesn't have a simple option recursive, but if there was an executeSync function then I could just run executeSync('mkdir -p "/non/existant/path"')

I'm trying to migrate from openresty to njs, but this limitation makes it impossible to migrate.

I could, in theory, create a node.js server that accepts shell commands as HTTP requests, but that's unnecessary extra work :/

[FJEagle]

Issam,
Thanks for clarification. Unfortunately I must confirm that this is no-go simple because njs is intended to be a supplementary tool for njs code development that runs inside nginx. And nginx won't be able to run external programs for any foreseeable future.

Is this still the case? There is a lot of limitations if we can't execute shell commands, for example fs.mkdirSync doesn't have a simple option recursive, but if there was an executeSync function then I could just run executeSync('mkdir -p "/non/existant/path"')

I'm trying to migrate from openresty to njs, but this limitation makes it impossible to migrate.

I could, in theory, create a node.js server that accepts shell commands as HTTP requests, but that's unnecessary extra work :/

I use nginx+fcgi as workaround if it helps. fcgi should be more lightweight than an extra nodejs server as backend.