Tracking sent responses

[Julien FROMENT]

Hello,

 

We would like to use Nginx to keep track of exactly what part of an
upstream's server response was sent over a socket. Nginx could call an
API asynchronously with the number of bytes sent over the socket for a
given request.

 

Here is the pseudo code:

  -- Client send a request

  -- Nginx processes the request and send it to the upstream

  ...

  -- The upstream returns the response

  -- Nginx sends the response to the client

  -- Nginx calls Async API with the number of bytes sent

 

I read a little bit of "Emiller's Guide To Nginx Module Development",
and I think we could write a Handler that provide some tracking
information. But I am unsure if it is possible to hook it at a low
enough level for our needs.

 

Are there any expert on this mailing list that could provide us
consulting services and guide us through the development of such
functionality?

 

Thanks in advance!

 

Julien


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