it would be nice to be able to exclude attributes from the message body when doing a PUT or POST in the invokeHTTP processor. Currently, there's no way to selectively choose which attributes go into the message body without using a replaceText processor in front of it, but that completely removes those attributes from being used later which is not always the desirable.
There are lots of situations where it would be nice to be able to use some flow attributes just in the request header or for other parts of the processor configuration without including them in the message body itself. For example, taking an authentication token that is carried along as a flow attribute so it can be used in an authorization header and NOT included in the body of the request. In general, invokeHTTP needs to allow for more control over the format and content of the message body being sent. -Wyllys Ingersoll
