How to specify content type for individual formdata elements

OSS Support
#1

Is it possible to use something like Blob in K6, in order to have form data elements with different content types? i.e one is a file (easy enough), another is json. Each would have their own respective content types.

Something like:

const fd = new FormData();
   fd.append('bookInfo', new Blob([JSON.stringify({
        name: "Book",
        quantity: "12"
    })], {
        type: "application/json"
    }));
  fd.append('testFile', http.file(someFile, 'somefil.txt', 'application/octet-stream'));
#2

Hi @jclarknet, welcome to the forum and sorry for the slow reploy :bowing_man:

It seems to not have been documented but you can just append an object with keys:

  • data - which will be the data you want
  • filename - you can skip that if you don’t want filename set.
  • content_type - with the content type you want, if not provided it will be application/octet-stream

You can see it done here