Content Length

[#1]

Simple macro to find the size (in bytes) of a specified string field. For use with APIs which require a Content-Length header.

[KasiaPi]

Hi, does anyone know how to use this macro?

[OllieClarke]

@KasiaPi 

If you’re using an API which requires a content-length header, you can use this macro to determine the length of your payload. 
construct your payload and choose that field in the macro configuration, then you’ll get a new field called content-length which you can add as a header in your download tool