Architecture for asynchronous Mongo GridFS module for Nginx

[Alexander Rodin]

Hi all!

I'm researching possible approaches to development of asynchronous GridFS
module for Nginx (because the existing one blocks the main Nginx thread).

I've read the source codes of most modules from
https://www.nginx.com/resources/wiki/modules/ and found that all of
asynchronous modules (e.g. Postgres or Mongo) implement the database
protocol by itself working with upstream. Is it the only way? I would like
to use mongo-c-driver (https://github.com/mongodb/mongo-c-driver) but I
need an example how to embed it into Nginx event loop to make non-blocking
module.

Could you suggest any module that uses the same approach or some manual
about it?

Best regards
Alexander
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