Rust code shared from the playground

playground.rs

fn main() {
    use std::net::TcpStream;
    let mut connection = TcpStream::connect("127.0.0.1:4000")
        .expect("should have worked");
    use dominio::rede::{GET, POST};
    use std::mem;
    let raw_has_id : [u8; 1] = unsafe {mem::transmute(0 as u8)};
    let objeto = Objeto {value: 1, network: None};
    let serialized = serde_json::to_vec(&objeto).unwrap();
    let raw_serialized : &[u8] = serialized.as_ref();
    let id = Uuid::nil();
    let raw_id = id.as_bytes();
    let req = POST;
    let raw_req: [u8; 1] = unsafe {mem::transmute(req)};
    let msg_size = raw_has_id.len() + raw_id.len() + raw_serialized.len() + raw_req.len();

    let raw_msg_size: [u8; 8] = unsafe {mem::transmute(msg_size)};
    let mut msg: Vec<u8> = Vec::new();
    msg.extend(raw_msg_size.iter());
    msg.extend(raw_req.iter());
    msg.extend(raw_has_id.iter());
    msg.extend(raw_id.iter());
    msg.extend(raw_serialized.iter());
    use std::io::Write;
    connection.write(msg.as_ref());
}