mirror of
https://github.com/scsibug/nostr-rs-relay.git
synced 2024-11-14 15:09:07 -05:00
99 lines
3.3 KiB
Rust
99 lines
3.3 KiB
Rust
use anyhow::{anyhow, Result};
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use nostr_rs_relay::config;
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use nostr_rs_relay::server::start_server;
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//use http::{Request, Response};
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use hyper::{Client, StatusCode, Uri};
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use std::net::TcpListener;
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use std::sync::mpsc as syncmpsc;
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use std::sync::mpsc::{Receiver as MpscReceiver, Sender as MpscSender};
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use std::thread;
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use std::thread::JoinHandle;
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use std::time::Duration;
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use tracing::{debug, info};
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pub struct Relay {
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pub port: u16,
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pub handle: JoinHandle<()>,
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pub shutdown_tx: MpscSender<()>,
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}
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pub fn start_relay() -> Result<Relay> {
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// setup tracing
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let _trace_sub = tracing_subscriber::fmt::try_init();
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info!("Starting up from main");
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// replace default settings
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let mut settings = config::Settings::default();
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// identify open port
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info!("Checking for address...");
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let port = get_available_port().unwrap();
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info!("Found open port: {}", port);
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// bind to local interface only
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settings.network.address = "127.0.0.1".to_owned();
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settings.network.port = port;
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// create an in-memory DB with multiple readers
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settings.database.in_memory = true;
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settings.database.min_conn = 4;
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settings.database.max_conn = 8;
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let (shutdown_tx, shutdown_rx): (MpscSender<()>, MpscReceiver<()>) = syncmpsc::channel();
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let handle = thread::spawn(|| {
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// server will block the thread it is run on.
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let _ = start_server(settings, shutdown_rx);
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});
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// how do we know the relay has finished starting up?
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Ok(Relay {
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port,
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handle,
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shutdown_tx,
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})
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}
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// check if the server is healthy via HTTP request
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async fn server_ready(relay: &Relay) -> Result<bool> {
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let uri: String = format!("http://127.0.0.1:{}/", relay.port);
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let client = Client::new();
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let uri: Uri = uri.parse().unwrap();
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let res = client.get(uri).await?;
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Ok(res.status() == StatusCode::OK)
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}
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pub async fn wait_for_healthy_relay(relay: &Relay) -> Result<()> {
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// TODO: maximum time to wait for server to become healthy.
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// give it a little time to start up before we start polling
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tokio::time::sleep(Duration::from_millis(10)).await;
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loop {
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let server_check = server_ready(relay).await;
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match server_check {
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Ok(true) => {
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// server responded with 200-OK.
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break;
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}
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Ok(false) => {
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// server responded with an error, we're done.
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return Err(anyhow!("Got non-200-OK from relay"));
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}
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Err(_) => {
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// server is not yet ready, probably connection refused...
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debug!("Relay not ready, will try again...");
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tokio::time::sleep(Duration::from_millis(10)).await;
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}
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}
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}
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info!("relay is ready");
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Ok(())
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// simple message sent to web browsers
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//let mut request = Request::builder()
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// .uri("https://www.rust-lang.org/")
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// .header("User-Agent", "my-awesome-agent/1.0");
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}
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// from https://elliotekj.com/posts/2017/07/25/find-available-tcp-port-rust/
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fn get_available_port() -> Option<u16> {
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(4030..20000).find(|port| port_is_available(*port))
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}
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pub fn port_is_available(port: u16) -> bool {
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match TcpListener::bind(("127.0.0.1", port)) {
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Ok(_) => true,
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Err(_) => false,
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}
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}
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