chore: checkpoint before Python removal

vendor/quinn/examples/connection.rs

@@ -0,0 +1,45 @@
+//! This example intends to use the smallest amount of code to make a simple QUIC connection.
+//!
+//! Checkout the `README.md` for guidance.
+
+use std::{
+    error::Error,
+    net::{IpAddr, Ipv4Addr, SocketAddr},
+};
+
+mod common;
+use common::{make_client_endpoint, make_server_endpoint};
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
+    let server_addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 5000);
+    let (endpoint, server_cert) = make_server_endpoint(server_addr)?;
+    // accept a single connection
+    let endpoint2 = endpoint.clone();
+    tokio::spawn(async move {
+        let incoming_conn = endpoint2.accept().await.unwrap();
+        let conn = incoming_conn.await.unwrap();
+        println!(
+            "[server] connection accepted: addr={}",
+            conn.remote_address()
+        );
+        // Dropping all handles associated with a connection implicitly closes it
+    });
+
+    let endpoint = make_client_endpoint("0.0.0.0:0".parse().unwrap(), &[&server_cert])?;
+    // connect to server
+    let connection = endpoint
+        .connect(server_addr, "localhost")
+        .unwrap()
+        .await
+        .unwrap();
+    println!("[client] connected: addr={}", connection.remote_address());
+
+    // Waiting for a stream will complete with an error when the server closes the connection
+    let _ = connection.accept_uni().await;
+
+    // Make sure the server has a chance to clean up
+    endpoint.wait_idle().await;
+
+    Ok(())
+}