tauri-api 0.5.2

Make tiny, secure apps for all desktop platforms with Tauri
Documentation 
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use std::net::TcpListener;

use rand;
use rand::distributions::{Distribution, Uniform};

pub fn get_available_port() -> Option<u16> {
  let mut rng = rand::thread_rng();
  let die = Uniform::from(8000..9000);

  for _i in 0..100 {
    let port = die.sample(&mut rng);
    if port_is_available(port) {
      return Some(port);
    }
  }
  None
}

pub fn port_is_available(port: u16) -> bool {
  TcpListener::bind(("127.0.0.1", port)).is_ok()
}