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How do I enter an unprintable byte into a nifi property that does not support the expression language?

I have csv files that are delimited with ascii 01 bytes. I want to utilize a CSVReader controller to read these records and convert to other formats.

My problem is that I don't know how to input a 0x01 byte into the CSVReader "Value Separator" property.

Is there a standard way to do hex escapes in nifi properties? This property does not support the nifi expression language.



I ended up just using two ReplaceText processors to escape special chars with \, then replace 0x01 with commas. I'd still like to know if there is a way to enter hex characters though.