indicatif progress bars with hyper 0.10

indicatif-hyper.rs

pub fn http_download_to_path(url: &str, save: &PathBuf) -> Result<()> {    
    let client = Client::with_connector(HttpsConnector::new(NativeTlsClient::new().unwrap()));
    let mut res = client.get(url).send()?;
    if res.status != hyper::Ok {
        return Err(Error::SomeError)));
    }

    let use_progress = true;
    if use_progress {
        use indicatif::{ProgressBar, ProgressStyle};
        let total_size = res.headers.get::<hyper::header::ContentLength>().unwrap().clone().0;
        let mut downloaded = 0;
        let mut buffer = [0; 1000000];
        let mut f = File::create(save)?;
        let pb = ProgressBar::new(total_size);
         pb.set_style(ProgressStyle::default_bar()
            .template("[{bar:40.cyan/blue}] {bytes}/{total_bytes} ({eta})")
            .progress_chars("#>-"));

        while downloaded < total_size {
            let read = res.read(&mut buffer)?;
            f.write(&mut buffer[0..read])?;
            downloaded += read as u64;
            pb.set_position(downloaded);
        }
        f.flush()?;
    } else {
        let mut buffer: Vec<u8> = Vec::new();
        res.read_to_end(&mut buffer)?;
        let mut f = File::create(save)?;
        f.write_all(&buffer)?;
    }
    Ok(())
}