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use std::{collections::HashMap, fs::File, path::PathBuf};
use tower_http::services::ServeDir;
use tracing::level_filters::LevelFilter;
use tracing_subscriber::EnvFilter;
use statsrv::{service::ServiceConfig, AppState};
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
let filter = EnvFilter::builder()
.with_default_directive(LevelFilter::INFO.into())
.from_env_lossy();
tracing_subscriber::fmt().with_env_filter(filter).init();
let config = match Config::parse() {
Ok(c) => c,
Err(err) => {
tracing::error!("Failed to read config file, using defaults: `{err}`");
Default::default()
}
};
let state = AppState::spawn_services(config.services);
let mut router = statsrv::router().with_state(state);
if let Some(path) = config.serve_dir {
router = router.nest_service("/", ServeDir::new(path));
}
router = router.layer(tower_http::trace::TraceLayer::new_for_http());
let listener = tokio::net::TcpListener::bind(config.address).await.unwrap();
tracing::info!("listening on {}", listener.local_addr().unwrap());
axum::serve(listener, router).await.map_err(Into::into)
}
#[derive(Debug, Clone, serde::Deserialize)]
#[serde(default)]
pub struct Config {
pub serve_dir: Option<PathBuf>,
pub address: String,
pub services: HashMap<String, ServiceConfig>,
}
impl Config {
const DEFAULT_CONFIG: &str = "/etc/statsrv.toml";
fn parse() -> Result<Self, Box<dyn std::error::Error>> {
let config_file = match std::env::args().nth(1) {
Some(p) => File::open(&p)?,
None => {
tracing::debug!("Falling back to default config location");
File::open(Self::DEFAULT_CONFIG)?
}
};
let config_toml = std::io::read_to_string(config_file)?;
toml::from_str(&config_toml).map_err(Into::into)
}
}
impl Default for Config {
fn default() -> Self {
Self {
serve_dir: None,
address: String::from("127.0.0.1:8080"),
services: Default::default(),
}
}
}
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