Receiving elasticsearch bulks in Logstash input

Hi,
Now, we use direct integration, application (es_output) to elasticsearch (using ingest pipeline)
But we would like to add logstash to our architecture. Is it possible to don't change output in the application, so es and receive the data in logstash? I tried with http and tcp input, using es_bulk codec but it doesnt work.
Can you help me?

Best

If you have an application that sends bulk requests to elasticsearch and you want to insert logstash between them then this thread might help.

Thank you! We'll check it