2022-08-31 23:25:17 +02:00
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use axum::{
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response::{Html, IntoResponse, Response},
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Router, routing::get, extract::State, middleware::Next, body,
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};
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2023-03-29 18:03:54 +02:00
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use hyper::{StatusCode, Request, header::CONTENT_TYPE};
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2023-03-25 22:12:49 +01:00
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use lazy_static::lazy_static;
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2023-03-29 18:03:54 +02:00
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use prometheus::{opts, IntCounterVec, TextEncoder, Encoder};
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2023-03-25 22:12:49 +01:00
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use std::sync::Arc;
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use tracing::{instrument, log::*};
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2022-08-31 23:20:59 +02:00
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2023-03-29 18:03:54 +02:00
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use crate::{AppState, WebsiteError};
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2022-08-31 23:20:59 +02:00
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2023-03-25 22:12:49 +01:00
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pub mod posts;
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lazy_static! {
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2023-03-26 12:01:59 +02:00
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pub static ref HIT_COUNTER: IntCounterVec = prometheus::register_int_counter_vec!(
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opts!("http_requests_total", "Total amount of http requests received"),
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&["route", "method", "status"]
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)
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.unwrap();
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}
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2023-03-29 18:03:54 +02:00
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pub fn routes() -> Router<Arc<AppState>> {
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Router::new()
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.route("/", get(index))
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.nest("/posts", posts::router())
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.route("/healthcheck", get(healthcheck))
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.route("/metrics", get(metrics))
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.nest_service("/static", tower_http::services::ServeDir::new("./static"))
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.layer(axum::middleware::from_fn(metrics_middleware))
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}
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2023-03-25 16:14:53 +01:00
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#[instrument(skip(state))]
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pub async fn index(
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State(state): State<Arc<AppState>>,
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) -> std::result::Result<Html<String>, WebsiteError> {
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let ctx = tera::Context::new();
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let res = state.tera.render("index.html", &ctx).map_err(|e| {
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error!("Failed rendering index: {}", e);
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WebsiteError::NotFound
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})?;
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Ok(Html(res))
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}
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async fn healthcheck() -> &'static str {
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"OK"
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}
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async fn metrics() -> impl IntoResponse {
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let encoder = TextEncoder::new();
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let metric_families = prometheus::gather();
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let mut buffer = vec![];
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encoder.encode(&metric_families, &mut buffer).unwrap();
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Response::builder()
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.status(200)
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.header(CONTENT_TYPE, encoder.format_type())
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.body(body::boxed(body::Full::from(buffer)))
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.unwrap()
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}
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2023-03-26 12:40:25 +02:00
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pub async fn not_found() -> Response {
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(StatusCode::NOT_FOUND, ()).into_response()
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}
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2023-03-29 18:03:54 +02:00
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pub async fn metrics_middleware<B>(request: Request<B>, next: Next<B>) -> Response {
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let path = request.uri().path().to_string();
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let method = request.method().to_string();
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let response = next.run(request).await;
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HIT_COUNTER.with_label_values(&[&path, &method, response.status().as_str()]).inc();
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response
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}
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2023-03-25 21:38:16 +01:00
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impl IntoResponse for WebsiteError {
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fn into_response(self) -> Response {
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match self {
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WebsiteError::NotFound => {
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info!("not found");
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(StatusCode::NOT_FOUND, ()).into_response()
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}
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WebsiteError::InternalError(e) => {
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error!("internal error: {e}");
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(StatusCode::INTERNAL_SERVER_ERROR, ()).into_response()
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}
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2022-08-31 23:20:59 +02:00
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}
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}
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}
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2023-03-26 13:05:39 +02:00
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#[cfg(test)]
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mod tests {
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#[test]
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fn render_index() {
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let tera = tera::Tera::new("templates/**/*").unwrap();
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let ctx = tera::Context::new();
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let _res = tera.render("index.html", &ctx).unwrap();
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}
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}
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