Jeff, This would easily be handled by ExtractText [1] wherein you can specify a regex to extract values from the content and add them as attributes on the FlowFile. For your case, you could use an ExtractText instance with a dynamic property of a desired attribute name and regular expression. The InvokeHTTP could then make use of the attribute extracted via Expression Language as you highlighted in your original message.
[1] https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi.processors.standard.ExtractText/index.html On Mon, Feb 15, 2016 at 11:14 PM, Jeff - Data Bean Australia < databean...@gmail.com> wrote: > Hi, > > The ${ attribute } expression can help using attributes of a FlowFile in > NiFi Expression Language, but what about the content? > > For example, if there is only one line in a FlowFile and I would like to > use it as part of my URL for InvokeHTTP processor, how can I do it? > > Thanks, > Jeff > > -- > Data Bean - A Big Data Solution Provider in Australia. >
