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use std::io::{BufRead, BufReader, Write};
use std::net::TcpStream;
use std::sync::mpsc;
use std::thread;
use std::time::{Duration, Instant};
pub fn connect(addr: &str) -> Result<TcpStream, Box<dyn std::error::Error>> {
let (tx, rx) = mpsc::channel();
let addr_str = addr.to_string();
thread::spawn(move || {
match TcpStream::connect(&addr_str) {
Ok(s) => tx.send(Ok(s)).unwrap(),
Err(e) => tx.send(Err(e)).unwrap(),
}
});
match rx.recv_timeout(Duration::from_secs(3)) {
Ok(Ok(s)) => {
let mut ping_writer = s.try_clone().unwrap();
let mut ping_reader = BufReader::new(s.try_clone().unwrap());
let start = Instant::now();
writeln!(ping_writer, "PING").unwrap();
let mut response = String::new();
ping_reader.read_line(&mut response).unwrap();
let elapsed = start.elapsed();
println!("Connected to {} with ping delay: {:?}", addr, elapsed);
Ok(s)
}
Ok(Err(e)) => Err(Box::new(e)),
Err(mpsc::RecvTimeoutError::Timeout) => Err("Connection timed out after 3 seconds".into()),
Err(_) => Err("Connection attempt failed".into()),
}
}
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