nng-c

High level bindings to nng.

Version corresponds to C library

Features

• http - Enables http transport;
• tls - Enables TLS transport;
• websocket - Enables websocket transport. Implies http feature;
• log - Enables logging via log crate;
• tracing - Enables logging via tracing crate.

Usage

Basic example of client and server communication

use nng_c::{options, Socket, Message, ErrorCode};

use core::time;

//Feel free to append zero char to avoid unnecessary allocations
const ADDR: &str = "ipc://nng-c-example\0";
const REQ_TIMEOUT: options::Req = options::Req {
     resend_time: Some(time::Duration::from_millis(50)),
     resend_tick: Some(time::Duration::from_millis(1)),
};

fn server() -> Result<(), ErrorCode> {
    let server = Socket::rep0()?;
    server.listen(ADDR.into()).expect("listen");

    loop {
        let msg = server.recv_msg()?;
        let body = msg.body();
        let msg = core::str::from_utf8(body).expect("utf-8 bytes");
        match msg {
            "quit" => break Ok(()),
            other => {
                println!("Received bytes(len={})={:?}", other.len(), other);
            }
        }
    }
}

let server = std::thread::spawn(server);

//Wait for thread to spin
std::thread::sleep(time::Duration::from_millis(10));

let client = Socket::req0().expect("Create client");
client.set_opt(REQ_TIMEOUT).expect("Set options");

client.connect(ADDR.into()).expect("connect");

let mut msg = Message::new().expect("create message");
msg.append("ping".as_bytes()).expect("Input bytes");
client.send_msg(msg).expect("send message");

let mut msg = Message::new().expect("create message");
msg.append("quit".as_bytes()).expect("Input bytes");
client.send_msg(msg).expect("send quit");

server.join().expect("Finish server successfully");