Skip backend request using plugin backend req/resp modifier

[Alberto Garcia Taravillo]

Hi all,

I'm writing a plugin to skip the backend request based on headers. 

The thing is the only way to stop the krakend pipeline is to throw an error in the request modifier plugin.
Extending KrakenD with Request and Response Plugin Modifiers | KrakenD API Gateway
If a return a 200 - ok with emptybody or a nil,nil the pipeline goes forward to the backend. 

My question is, 
How do I stop the flow/krakend pipeline without returning an error?
My main problem is I see an error in the logs that is not actually an error, it's the desired behaviour, to skip the backend request. 
Documentation does not mention how to skip it. 

Code snippet of current implementation:

        // If no module matches, skip the request and return an empty response

        logger.Debug(fmt.Sprintf("[PLUGIN]: Module '%s' not found in 'Modules' header. Skipping request.", expectedModule))

        return nil, HTTPResponseError{Code: 412, Msg: "Module not needed for backend call"}

// Logs: ▶ DEBUG [PLUGIN]: Module '#postman-1#' not found in 'Modules' header. Skipping request.
2025-04-25 12:52:22 [KRAKEND]  2025/04/25 - 10:52:22.498 ▶ ERROR [ENDPOINT: /v2/:country/home/anonymous] Error #0: Module not needed for backend call
2025-04-25 12:52:22 [GIN] 2025/04/25 - 10:52:22 | 200 |  459.178872ms |      172.18.0.1 | GET      "/v2/ES/home/anonymous"
2025-04-25 12:52:22 Error #01: Module not needed for backend call

Thanks in advance