I try to pull data from RestApi post url to nifi for that I try to use InvokeHTTP method anyone help me. How to declare those post paraameters like key,values in processor?. I'm using HDP 2.5. Initially I declare key and value at "Attribute to send" option in InvokeHTTP processor. But it won't work. I don't know whether it is correct way or not
The "Attributes to Send" property allows you to enter a java regular expression for the FlowFile Attributes you wish to send as headers:
Looks like what you really want to use are custom dynamic properties:
You can add as many dynamic properties as you want by clicking the small "+" icon in the upper right corner of the properties tab on the invokeHTTP processor.
Sorry for late response, but I don't get pinged unless you add a comment to my response or tag me in your new answer.
The dynamic properties expect the the "value" to be a valid NiFI expression language (EL) statement. Otherwise it is treated as a literal value. So i expect what you are seeing is that exact string passed in the nested header or some kind of session rollback, etc...
Also not sure how you are pulling data using a "POST" method? Shouldn't you be using "GET"?
I am also trying same think i am trying to get data from another tool using invokeHttp process but where i need to pass access token and parameter i am not able to understand it if you have resolve it please help me.