@kleyson
Apache NiFi provides a simple to use UI that facilitates flow based programming through the used of hundreds of available components. NiFi's primary function is the ability to ingest unstructured data from a large variety of sources, transform, route , and push that data to a variety of destinations.
While NiFi certainly has numerous HTTP processor components (ListenHTTP, HandleHTTPRequest, HandleHTTPResponse) that can be added to the canvas to support HTTP based connections into a dataflow, NiFi is so much more then just that. There are many many ways to ingest data in to NiFi and many many ways to manipulate, modify, generate, split, merge, write, send, etc. the data once it is inside NiFi.
The NiFi documentation includes details on all the included components available in the download.
Apache NiFi 1.x documentation: https://nifi.apache.org/docs/nifi-docs/
Apache NiFi 2.x documentation: https://nifi.apache.org/documentation/v2/
There are additional add-on NiFi nars that can add even more components.
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Thank you,
Matt