question Re: NiFi provide Rest API to get data in Archives of Support Questions (Read Only)

NiFi provide Rest API to get data

toandyliang — Thu, 02 Feb 2017 22:52:28 GMT

Could Nifi provide a rest api to allow java program to submit the data?

I know Nifi can call a rest api from java, but can Nifi provide a api to allow other app to push data?

Thanks

Andy

Re: NiFi provide Rest API to get data

pvillard — Thu, 02 Feb 2017 22:54:20 GMT

Hi @Andy Liang,

If you want to send data into NiFi through HTTP REST calls, you can use ListenHTTP processor. The data send to the endpoint you define in this processor will be the content of the generated flow files.

If you to manage what responses are sent to your client, you can also use the combination of HandleHttpRequest and HandleHttpResponse. The content of the flow file coming in HandleHttpResponse will be the body of the HTTP response sent to the client. This way you can, for example, create web services for external clients that need access to some data.

Hope this helps.

Re: NiFi provide Rest API to get data

toandyliang — Thu, 02 Feb 2017 23:10:58 GMT

@Pierre Villard could the java app call the ListenHTTP processor or HandleHttpRequest directly in the java app? I know NiFi has rest-api, but I never use them. Do you know any tutorial/example/info is available?

Thanks a lot, Andy

Re: NiFi provide Rest API to get data

pvillard — Thu, 02 Feb 2017 23:40:42 GMT

You can have a look at unit tests of this processor:

https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/test/java/org/apache/nifi/processors/standard/TestListenHTTP.java

Re: NiFi provide Rest API to get data

toandyliang — Wed, 08 Feb 2017 05:39:24 GMT

@Pierre Villard Thanks a lot for your detail advice. HandleHttpRequest and HandleHttpResponse are exactly what I need.

Re: NiFi provide Rest API to get data

TimothySpann — Tue, 09 Feb 2021 18:41:40 GMT

Here is a cool NiFi websocket app

https://www.datainmotion.dev/2020/12/ingesting-websocket-data-for-live-stock.html

Hosting web apps in NiFi

https://www.datainmotion.dev/2020/11/flank-smart-weather-websocket.html

https://www.datainmotion.dev/2020/12/ingesting-websocket-data-for-live-stock.html