and now I rewrite that example with kotlin

I use httpurlconnection

HTTP has a lot of request params: get, post, headers, cookies, any kind of body type

so just set map data to particular API

data=getBody(r"7.ogg") this getBody will return a dict but data suppose to take bytes

Gson should allow to convert map to Json, so at first glance I don't see problem

But looks that original python script doesn't send it as JSON, but as

key=value

string, at least how I understand python request api

So, just create such string from map (you actually don't need map, body can just return string, but if you want, you also can do it from Map by just converting each entity to string and joining)

And than write string to output

But in general it's not really good approach for binary data, but it what original sample does