[pestatije]

Right, i see two different problems here: json lib apparently leaking, and deciding best format for info transfer.

For the first one: look in specific json lib forums, ask there, check open issues, open issue. (all those stackoverflow questions/answers are really confusers, not helpers).

For the second one: so it's text, i'd transfer text then. It's too much text? Process it in chunks. Your final format is json? Encapsulate your text as json at the last final step.