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http_health_check.rs
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http_health_check.rs
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//! Minimal `curl` or `wget` to be used for container health checks.
//!
//! It's convenient to avoid using third-party libraries because:
//!
//! - They are harder to maintain.
//! - They introduce new attack vectors.
use std::time::Duration;
use std::{env, process};
use reqwest::Client;
#[tokio::main]
async fn main() {
let args: Vec<String> = env::args().collect();
if args.len() != 2 {
eprintln!("Usage: cargo run --bin http_health_check <HEALTH_URL>");
eprintln!("Example: cargo run --bin http_health_check http://127.0.0.1:1313/health_check");
std::process::exit(1);
}
println!("Health check ...");
let url = &args[1].clone();
let client = Client::builder().timeout(Duration::from_secs(5)).build().unwrap();
match client.get(url).send().await {
Ok(response) => {
if response.status().is_success() {
println!("STATUS: {}", response.status());
process::exit(0);
} else {
println!("Non-success status received.");
process::exit(1);
}
}
Err(err) => {
println!("ERROR: {err}");
process::exit(1);
}
}
}