how to configure listenerhttp processor in NIFI

Question

We want to configure listenhttp processor that listen our web service. question is what are the configuration in http listener processor in nifi such that when we will make curl post request this ListenHttp processor will catch the update. basically i didn't understand what i have to put in Base path (is it i have to put nifi address i.e http://localhost:8080/contentListener or our web app service URL???) what is contentListener. And is it i have to put our web app port number in listening port? in the request command what i have to put in url part

curl --request POST 'http://(here i have to used the nifi url)' -H 'Authorization: Key demo-key

i know this is very basic question but i'm just using this don't know any thing about nifi and curl command .....thanks in advance

hegdemahendra · Accepted Answer

Hi @renuu ,

You can use'HandleHttpRequest' to listen for incoming GET/POST request on specific port and respond back using 'HandleHttpResponse' processor.
Add one Http Context Map controller service and use the same in both processor to map request to response, thats it.

Take a look at the below sample configurations.

This HandleHTTPRequest listens for http requests on port 8888 & specifi path i.e /curlRequest.
'Allowed path' is optional, if you just want listen for any request then you ca remove that value.

HandleHTTPRequest processor

HandleHTTPResponse responds to client with 201 response code and any content which is flowfile content.

HandleHTTPResponse processor

Instead of curl command I have invoked above listener with another NiFi processor (which you can consider as client)
InvokeHttp processor with target end point as above HandleHTTPRequest host & port.
I am using host as localhost as I am invoking form Nifi (local) only.
For curl command form outside, you need to use your nifi host name instead of 'localhost'.
So that would be 'http://<hostname>':8888/curlRequest

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