feat: add network ngrok-demo

__network/ngrok-demo/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "ngrok-demo"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0.70"
+axum = "0.6.12"
+ngrok = { version = "0.11.2", features = ["axum"] }
+tokio = { version = "1.27.0", features = ["full"] }

__network/ngrok-demo/src/main.rs

@@ -0,0 +1,45 @@
+use std::net::SocketAddr;
+
+use axum::{
+    extract::ConnectInfo,
+    routing::get,
+    Router,
+};
+use ngrok::prelude::*;
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    // build our application with a single route
+    let app = Router::new().route(
+        "/",
+        get(
+            |ConnectInfo(remote_addr): ConnectInfo<SocketAddr>| async move {
+                format!("Hello, {remote_addr:?}!\r\n")
+            },
+        ),
+    );
+
+    let tun = ngrok::Session::builder()
+        // Read the token from the NGROK_AUTHTOKEN environment variable
+        .authtoken_from_env()
+        // Connect the ngrok session
+        .connect()
+        .await?
+        // Start a tunnel with an HTTP edge
+        .http_endpoint()
+        .listen()
+        .await?;
+
+    println!("Tunnel started on URL: {:?}", tun.url());
+
+    // Instead of binding a local port like so:
+    // axum::Server::bind(&"0.0.0.0:8000".parse().unwrap())
+    // Run it with an ngrok tunnel instead!
+    axum::Server::builder(tun)
+        .serve(app.into_make_service_with_connect_info::<SocketAddr>())
+        .await
+        .unwrap();
+
+    Ok(())
+}
+