NIFI-11934 allow FlowFile filename to be transmitted in HTTP header f…

[markobean]

…or InvokeHTTP

Summary

Removed 'filename' from the list of attributes to exclude when sending FlowFIle attributes using InvokeHTTP. Updated some of the documentation as well.
NIFI-11934

Tracking

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Issue Tracking

• Apache NiFi Jira issue created

Pull Request Tracking

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• Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000

Pull Request Formatting

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• Pull Request refers to a feature branch with one commit containing changes

Verification

Instantiate InvokeHTTP and set 'Request Header Attributes Pattern' to ".*" (or any other value which will include the "filename" attribute.) Receive FlowFile with a corresponding ListenHTTP. Verify 'filename' is as expected (same as FlowFile that was transferred.)

Build

• Build completed using mvn clean install -P contrib-check
  • JDK 17

Licensing

• New dependencies are compatible with the Apache License 2.0 according to the License Policy
• New dependencies are documented in applicable LICENSE and NOTICE files

Documentation

• Documentation formatting appears as expected in rendered files

[exceptionfactory]

Thanks for the adjustment @markobean. The documentation updates are helpful in light of the propose change for the filename attribute filtering. I noted a couple minor documentation adjustment recommendations.

[markobean]

Thanks @exceptionfactory. I pushed changes per recommendations.

[exceptionfactory]

Thanks for the updates @markobean, looks good! +1 merging