Regex to replace empty curl braces in nifi

r_rachuri — Mon, 18 Apr 2022 07:34:56 GMT

Hi All,

I have a requirement where there are some empty curl braces in my JSON output which needs to be removed and replaced with empty string. The regex seems to work fine to find the braces when tested outside.

Sample can be found here:

https://regex101.com/r/AtTPv1/2

I tried to use this regex in nifi using replaceText, but it's not doing the replace. Below is my config for replaceText.

Can anyone suggest if there are any options to change to make it work or any other better alternatives for working with JSON?

Thanks in advance!

Re: Regex to replace empty curl braces in nifi

araujo — Thu, 21 Apr 2022 07:20:44 GMT

@r_rachuri ,

Your expression works for me on NiFi 1.15.2. It's too complicated, though, and it still leaves a pair of curly brackets behind.

Try using this one instead:

\{[ \n]*\}[ \n]*,?[ \n]*

Cheers,

André

question Regex to replace empty curl braces in nifi in Support Questions

Regex to replace empty curl braces in nifi

Re: Regex to replace empty curl braces in nifi