how to use hyper send a multiple part http request

[xiaoxiaojuan]

for example my body is like below

I want to send one by one, for I want to send the json part and then the audio part and then the end boundary., and then get the response .

Not sure how to do it

------------------------------4ebf00fbcf09
Content-Disposition: form-data; name="metadata"
Content-Type: application/json; charset=UTF-8

{data}

------------------------------4ebf00fbcf09
Content-Disposition: form-data; name="audio"
Content-Type: application/octet-stream
audio data
------------------------------4ebf00fbcf09--

[Lukasa]

You would need to construct the body yourself, probably by using a library, and then call request with the appropriate body.