Using flowfile size as an argument in RouteOnAttribute nifi -

i want know if possible use flowfile size argument in routeonattribute want make expression :

${filename.filesize>500}

but tells me expression ought return true , expression returns string should able make new connection in routeonattribute(p.s filename flowfile name)

two ways check empty response present in flowfile.

1.using content-length attribute-->${content-length}

2.using extract text processor extracts entire content in attribute.

flow_content--(.*)

then check ${flow_content:isempty():not()}

it may helpful case.

wiki

tL