let master = Master {
    host: MASTER_HOST.to_string(),
    port: Some(MASTER_PORT),
};

let options: AssignKeyOptions = Default::default();
let master_resp = master.assign_key(&Some(options)).await;

let fid: FID;
let volume: Volume;
match master_resp {
    Ok(x) => {
        println!("Address {}", x.location.url);
        volume = Volume::from_str(&x.location.url).unwrap();
        fid = x.fid;
    }
    _ => panic!("failed to assign key"),
}

let data = Bytes::from("Hello World!");
let resp = volume.upload_file_bytes(&fid, &data, &None).await;

let master = Master {
    host: MASTER_HOST.to_string(),
    port: Some(MASTER_PORT),
};

let options: AssignKeyOptions = Default::default();
let master_resp = master.assign_key(&Some(options)).await;

let fid: FID;
let volume: Volume;
match master_resp {
    Ok(x) => {
        println!("Address {}", x.location.url);
        volume = Volume::from_str(&x.location.url).unwrap();
        fid = x.fid;
    }
    _ => panic!("failed to assign key"),
}

let form = Form::new().part("file", Part::text("Hello World!").file_name("hello.txt").mime_str("text/plain").unwrap());

let file_resp = volume.upload_file_form(&fid, form, &None).await;