File: msg.rs

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//{
#[cfg(not(windows))]
fn main() {}
#[cfg(windows)]
fn main() -> std::io::Result<()> {
    //}
    use {interprocess::os::windows::named_pipe::*, recvmsg::prelude::*};
    // Preemptively allocate a sizeable buffer for receiving. Keep in mind that this will depend
    // on the specifics of the protocol you're using.
    let mut buffer = MsgBuf::from(Vec::with_capacity(128));

    // Create our connection. This will block until the server accepts our connection, but will
    // fail immediately if the server hasn't even started yet; somewhat similar to how happens
    // with TCP, where connecting to a port that's not bound to any server will send a "connection
    // refused" response, but that will take twice the ping, the roundtrip time, to reach the
    // client.
    let mut conn = DuplexPipeStream::<pipe_mode::Messages>::connect_by_path(r"\\.\pipe\Example")?;

    // Here's our message so that we could check its length later.
    static MESSAGE: &[u8] = b"Hello from client!";
    // Send the message, getting the amount of bytes that was actually sent in return.
    let sent = conn.send(MESSAGE)?;
    assert_eq!(sent, MESSAGE.len()); // If it doesn't match, something's seriously wrong.

    // Use the reliable message receive API, which gets us a `RecvResult` from the
    // `reliable_recv_msg` module.
    conn.recv_msg(&mut buffer, None)?;

    // Convert the data that's been received into a string. This checks for UTF-8 validity, and if
    // invalid characters are found, a new buffer is allocated to house a modified version of the
    // received data, where decoding errors are replaced with those diamond-shaped question mark
    // U+FFFD REPLACEMENT CHARACTER thingies: �.
    let received_string = String::from_utf8_lossy(buffer.filled_part());

    // Print out the result!
    println!("Server answered: {received_string}");
    //{
    Ok(())
} //}