Receive an Exact Number of Bytes into a BinData

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Demonstrates Socket.ReceiveBdN, which receives exactly the requested number of bytes and appends them to a BinData, continuing until the full count is satisfied.

let socket = chilkat::Socket::new();

// Connect to the server using TLS.
let b_tls = true;
let max_wait_ms = 5000;
if socket.connect("example.com", 5000, b_tls, max_wait_ms).is_err() {
    println!("{}", socket.last_error_text());
    return;
}

// MaxReadIdleMs controls the inactivity limit for receiving.  The ReceiveBdN call will fail if
// incoming bytes halt for longer than this many milliseconds before the full amount is received.
socket.set_max_read_idle_ms(15000);

// Receive exactly the requested number of bytes, appending them to a BinData.  The method continues
// receiving until the full count is satisfied or a failure occurs.
let bd = chilkat::BinData::new();
if socket.receive_bd_n(256, &bd).is_err() {
    println!("{}", socket.last_error_text());
    return;
}

println!("Received {} bytes.", bd.num_bytes());