How do you upload a file as part of a multipart form using async reqwest ?

[leo91000]

There are example of how to use the blocking client to upload a file with multipart form, however there is no how to's for the async client.

After looking around the internet I came up with this solution :

  let file_handle = File::open(file_path)
    .await
    .expect(format!("Failed to open image at {}", file_path).as_str());

  let bytes_stream = FramedRead::new(file_handle, BytesCodec::new());

  let form = multipart::Form::new().part(
    "image",
    multipart::Part::stream(reqwest::Body::wrap_stream(bytes_stream))
      .file_name(filename)
      .mime_str(mime)
      .expect("Invalid mime for creating an image"),
  );

reqwest.post("...").multipart(form).send().await.expect("Failed to execute request")

However using a request bin I see that the body is empty.
If somebody could help me there, I would be very grateful, thanks 🙏🏼

[leo91000]

I found my error, I added manually the Content-Type header, so it was i ncompatible with the multipart header. As a result the multipart request was invalid.