[jira] [Created] (NIFI-10365) InvokeHTTP: support dynamic specification of "Request Header Attributes Pattern"

["Paul Grey (Jira)" <ji...@apache.org>]

Paul Grey created NIFI-10365:
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             Summary: InvokeHTTP: support dynamic specification of "Request Header Attributes Pattern"
                 Key: NIFI-10365
                 URL: https://issues.apache.org/jira/browse/NIFI-10365
             Project: Apache NiFi
          Issue Type: Improvement
            Reporter: Paul Grey


The current implementation of processor `InvokeHTTP` supports specification of 
flowfile attributes to send as HTTP headers via processor property `Request Header Attributes Pattern`.  This property is a regex, and is immutable while the processor is running.

In some situations, it would be helpful to dynamically specify attributes to send as HTTP headers.  So some InvokeHTTP invocations would send HTTP headers A and B, while others would send headers B and C.

One possible implementation would involve the interpretation of an incoming flowfile attribute value to serve the role currently filled by `Request Header Attributes Pattern`.



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