Apache Nifi : Basic Authentication Details using attributes

[#1]

We have a use case to use "InvokeHttp" for restful service, getting all the details from the DB (URL/username/password), need to pass basic authentication (username and password) via attributes retrieved from DB. Is it possible to pass authentication using attributes ?

[#2 · Accepted solution]

@nyakkanti

Only processor properties that support the NiFi expression language can be configured to use FlowFile attributes.

Some properties (even if the processor property says supports expression language: false, you may be able to use a simple ${<FlowFile-attribute-name>} to return a value from a attribute key/value pair.

But this is never true for sensitive properties such as password properties. Password properties are especially difficult since those values are encrypted upon apply. So if you entered ${<FlowFile-attribute-name>} , that is what gets encrypted. The processor then decrypts that when making the connection. Nowhere in that process does it ever retrieve a value from the FlowFile.

Thanks, Matt