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diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..6c48186 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,36 @@ +[package] +name = "{{project-name}}" +version = "0.1.0" +edition = "2021" +description = "{{project-description}}" + +[dependencies] +{% if include_aide %}aide = { version = "0.16.0-alpha.1", features = [ + "axum", + "axum-json", + "axum-query", +] } +{% endif %}anyhow = "1.0.101" +axum = { version = "0.8.8", features = ["json", "query"] } +axum-app-wrapper = { git = "https://gitea.fasharp.io/fa-sharp/axum-app-wrapper", rev = "a8d5e4f962" } +{% if include_aide %}schemars = { version = "1.0", features = [ + "chrono04", + "preserve_order", + "url2", + "uuid1" +] } +{% endif %} +dotenvy = "0.15.7" +figment = { version = "0.10.19", features = ["env"] } +serde = "1.0.228" +serde_json = "1.0.145" +tokio = { version = "1.48.0", default-features = false, features = [ + "macros", + "net", + "rt", + "rt-multi-thread", + "signal" +] } +tracing = "0.1.44" +tracing-subscriber = { version = "0.3.22", features = ["env-filter", "json"] } +type-map = "0.5.1" diff --git a/README.md b/README.md new file mode 100644 index 0000000..8a8fe1f --- /dev/null +++ b/README.md @@ -0,0 +1,111 @@ +# Axum Web Service Template + +A production-ready template for building web services with Rust and Axum. + +## Features + +- 🚀 **Axum** - Fast and ergonomic web framework +- ⚙️ **Configuration Management** - Environment-based config with `figment` +- 📝 **Structured Logging** - JSON logging in production with `tracing` +- 🔄 **Graceful Shutdown** - Handles SIGTERM and SIGINT signals +- 🏗️ **Plugin Architecture** - Modular app initialization with `axum-app-wrapper` +- 🔌 **Optional OpenAPI** - API documentation with `aide` (optional) + +## Usage + +### Using cargo-generate + +Install cargo-generate if you haven't already: + +```bash +cargo install cargo-generate +``` + +Generate a new project from this template: + +```bash +cargo generate --git +``` + +You'll be prompted for: +- **Project name**: The name of your new project +- **Project description**: A brief description +- **Environment variable prefix**: Prefix for env vars (e.g., `APP` for `APP_HOST`, `APP_PORT`) +- **Default port**: The server's default port +- **Default log level**: trace, debug, info, warn, or error +- **Include aide**: Whether to include OpenAPI documentation support + +### Manual Setup + +1. Clone or download this repository +2. Update `Cargo.toml` with your project name and details +3. Copy `.env.example` to `.env` and configure your environment variables +4. Run `cargo build` + +## Configuration + +Configuration is loaded from environment variables. The prefix is configurable during template generation. + +Example with `APP` prefix: + +```bash +# Required +APP_API_KEY=your-secret-key + +# Optional (defaults shown) +APP_HOST=127.0.0.1 +APP_PORT=8080 +APP_LOG_LEVEL=info +``` + +In development, you can use a `.env` file (copy from `.env.example`). + +## Project Structure + +``` +. +├── src/ +│ ├── main.rs # Entry point, server setup +│ ├── lib.rs # App initialization +│ ├── config.rs # Configuration management +│ └── state.rs # Application state +├── Cargo.toml # Dependencies +└── .env.example # Example environment variables +``` + +## Development + +```bash +# Run in development mode (loads .env file) +cargo run + +# Run with custom log level +RUST_LOG=debug cargo run + +# Build for production +cargo build --release +``` + +## Adding Routes + +This template uses `axum-app-wrapper` for modular initialization. To add routes: + +1. Create a new plugin in a separate module +2. Register it in `lib.rs`: + +```rust +pub async fn create_app() -> anyhow::Result<(axum::Router, AppConfig, impl Future + Send)> { + let (router, state, on_shutdown) = App::new() + .register(config::plugin()) + .register(your_routes::plugin()) // Add your plugin here + .init() + .await?; + + let app_config = state.config.to_owned(); + Ok((router.with_state(state), app_config, on_shutdown)) +} +``` + +## License + +Configure your license as needed. \ No newline at end of file diff --git a/cargo-generate.toml b/cargo-generate.toml new file mode 100644 index 0000000..f513eb8 --- /dev/null +++ b/cargo-generate.toml @@ -0,0 +1,28 @@ +[template] +cargo_generate_version = ">=0.10.0" + +[placeholders.project-description] +type = "string" +prompt = "Project description?" +default = "A Rust web service built with Axum" + +[placeholders.env_prefix] +type = "string" +prompt = "Environment variable prefix (e.g., APP for APP_HOST, APP_PORT)?" +default = "APP" + +[placeholders.default_port] +type = "string" +prompt = "Default server port?" +default = "8080" + +[placeholders.default_log_level] +type = "string" +prompt = "Default log level?" +default = "info" +choices = ["trace", "debug", "info", "warn", "error"] + +[placeholders.include_aide] +type = "bool" +prompt = "Include aide for OpenAPI documentation?" +default = true diff --git a/src/config.rs b/src/config.rs new file mode 100644 index 0000000..60f5d3e --- /dev/null +++ b/src/config.rs @@ -0,0 +1,48 @@ +use std::net::{IpAddr, Ipv4Addr}; + +use anyhow::Context; +use axum_app_wrapper::AdHocPlugin; +{% if include_aide %}use schemars::JsonSchema; +{% endif %} +use serde::Deserialize; + +use crate::state::AppState; + +#[derive(Debug, Clone, Deserialize{% if include_aide %}, JsonSchema{% endif %})] +pub struct AppConfig { + pub api_key: String, + #[serde(default = "default_host")] + pub host: IpAddr, + #[serde(default = "default_port")] + pub port: u16, + #[serde(default = "default_log_level")] + pub log_level: String, +} +fn default_host() -> IpAddr { + IpAddr::V4(Ipv4Addr::LOCALHOST) +} +fn default_port() -> u16 { + {{default_port}} +} +fn default_log_level() -> String { + "{{default_log_level}}".to_string() +} + +/// Plugin that reads and validates configuration, and adds it to server state +pub fn plugin() -> AdHocPlugin { + AdHocPlugin::new().on_init(|mut state| async move { + let config = extract_config()?; + state.insert(config); + Ok(state) + }) +} + +/// Extract the configuration from env variables prefixed with `{{env_prefix}}_`. +fn extract_config() -> anyhow::Result { + let config = figment::Figment::new() + .merge(figment::providers::Env::prefixed("{{env_prefix}}_")) + .extract::() + .context("Failed to extract valid configuration")?; + + Ok(config) +} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..56de26f --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,13 @@ +use axum_app_wrapper::App; + +use crate::config::AppConfig; + +mod config; +mod state; + +pub async fn create_app() -> anyhow::Result<(axum::Router, AppConfig, impl Future + Send)> { + let (router, state, on_shutdown) = App::new().register(config::plugin()).init().await?; + let app_config = state.config.to_owned(); + + Ok((router.with_state(state), app_config, on_shutdown)) +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..5853e0f --- /dev/null +++ b/src/main.rs @@ -0,0 +1,70 @@ +use std::{net::SocketAddr, str::FromStr}; + +use {{crate_name}}::create_app; +use tracing::level_filters::LevelFilter; +use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt}; + +#[tokio::main] +async fn main() -> anyhow::Result<()> { + // Read .env file in debug mode + #[cfg(debug_assertions)] + dotenvy::dotenv().ok(); + + // Build server + let (router, config, on_shutdown) = create_app().await?; + + // Configure logging output (use JSON logs in release mode) + let level_filter = LevelFilter::from_str(&config.log_level)?; + let env_filter = tracing_subscriber::EnvFilter::builder() + .with_default_directive(level_filter.into()) + .from_env_lossy(); + if cfg!(debug_assertions) { + tracing_subscriber::fmt() + .with_env_filter(env_filter) + .with_max_level(level_filter) + .init(); + } else { + tracing_subscriber::registry() + .with(env_filter) + .with(level_filter) + .with(tracing_subscriber::fmt::layer().json().flatten_event(true)) + .init(); + } + + // Start listening for requests + let addr = SocketAddr::new(config.host, config.port); + let listener = tokio::net::TcpListener::bind(addr).await?; + tracing::info!("Server listening on http://{}...", listener.local_addr()?); + axum::serve(listener, router.into_make_service()) + .with_graceful_shutdown(shutdown_signal(on_shutdown)) + .await?; + + Ok(()) +} + +/// Shutdown signal: listens for Ctrl-C, SIGINT, SIGTERM signals +async fn shutdown_signal(on_shutdown: impl Future + Send) { + let ctrl_c = async { + tokio::signal::ctrl_c() + .await + .expect("failed to register Ctrl-C handler"); + }; + + #[cfg(unix)] + let terminate = async { + tokio::signal::unix::signal(tokio::signal::unix::SignalKind::terminate()) + .expect("failed to register SIGTERM handler") + .recv() + .await; + }; + + #[cfg(not(unix))] + let terminate = std::future::pending::<()>(); + + tokio::select! { + _ = ctrl_c => {}, + _ = terminate => {}, + } + tracing::info!("Received shutdown signal, shutting down server..."); + on_shutdown.await; +} diff --git a/src/state.rs b/src/state.rs new file mode 100644 index 0000000..79b1a27 --- /dev/null +++ b/src/state.rs @@ -0,0 +1,39 @@ +//! Application state + +use std::{any::type_name, ops::Deref, sync::Arc}; + +use type_map::concurrent::TypeMap; + +use crate::config::AppConfig; + +/// App state stored in the Axum router +#[derive(Clone)] +pub struct AppState(Arc); + +pub struct AppStateInner { + pub config: AppConfig, +} + +impl Deref for AppState { + type Target = AppStateInner; + + fn deref(&self) -> &Self::Target { + &self.0 + } +} + +impl TryFrom for AppState { + type Error = anyhow::Error; + + fn try_from(mut map: TypeMap) -> Result { + Ok(Self(Arc::new(AppStateInner { + config: extract(&mut map)?, + }))) + } +} + +fn extract(type_map: &mut TypeMap) -> anyhow::Result { + type_map + .remove() + .ok_or_else(|| anyhow::anyhow!("Type not found in state: {}", type_name::())) +}