feat(api): [torrust#143] axum api, GET /stats endpoint

src/apis/routes.rs

@@ -1,7 +1,65 @@
+use std::sync::Arc;
+
+use axum::extract::State;
 use axum::response::Json;
 use serde_json::{json, Value};
 
+use crate::api::resource::stats::Stats;
+use crate::tracker::Tracker;
+
 #[allow(clippy::unused_async)]
 pub async fn root() -> Json<Value> {
     Json(json!({ "data": 42 }))
 }
+
+#[allow(clippy::unused_async)]
+pub async fn get_stats(State(tracker): State<Arc<Tracker>>) -> Json<Value> {
+    let mut results = Stats {
+        torrents: 0,
+        seeders: 0,
+        completed: 0,
+        leechers: 0,
+        tcp4_connections_handled: 0,
+        tcp4_announces_handled: 0,
+        tcp4_scrapes_handled: 0,
+        tcp6_connections_handled: 0,
+        tcp6_announces_handled: 0,
+        tcp6_scrapes_handled: 0,
+        udp4_connections_handled: 0,
+        udp4_announces_handled: 0,
+        udp4_scrapes_handled: 0,
+        udp6_connections_handled: 0,
+        udp6_announces_handled: 0,
+        udp6_scrapes_handled: 0,
+    };
+
+    let db = tracker.get_torrents().await;
+
+    db.values().for_each(|torrent_entry| {
+        let (seeders, completed, leechers) = torrent_entry.get_stats();
+        results.seeders += seeders;
+        results.completed += completed;
+        results.leechers += leechers;
+        results.torrents += 1;
+    });
+
+    let stats = tracker.get_stats().await;
+
+    #[allow(clippy::cast_possible_truncation)]
+    {
+        results.tcp4_connections_handled = stats.tcp4_connections_handled as u32;
+        results.tcp4_announces_handled = stats.tcp4_announces_handled as u32;
+        results.tcp4_scrapes_handled = stats.tcp4_scrapes_handled as u32;
+        results.tcp6_connections_handled = stats.tcp6_connections_handled as u32;
+        results.tcp6_announces_handled = stats.tcp6_announces_handled as u32;
+        results.tcp6_scrapes_handled = stats.tcp6_scrapes_handled as u32;
+        results.udp4_connections_handled = stats.udp4_connections_handled as u32;
+        results.udp4_announces_handled = stats.udp4_announces_handled as u32;
+        results.udp4_scrapes_handled = stats.udp4_scrapes_handled as u32;
+        results.udp6_connections_handled = stats.udp6_connections_handled as u32;
+        results.udp6_announces_handled = stats.udp6_announces_handled as u32;
+        results.udp6_scrapes_handled = stats.udp6_scrapes_handled as u32;
+    }
+
+    Json(json!(results))
+}

src/apis/server.rs

@@ -6,11 +6,14 @@ use axum::Router;
 use futures::Future;
 use warp::hyper;
 
-use super::routes::root;
+use super::routes::{get_stats, root};
 use crate::tracker;
 
-pub fn start(socket_addr: SocketAddr, _tracker: &Arc<tracker::Tracker>) -> impl Future<Output = hyper::Result<()>> {
-    let app = Router::new().route("/", get(root));
+pub fn start(socket_addr: SocketAddr, tracker: &Arc<tracker::Tracker>) -> impl Future<Output = hyper::Result<()>> {
+    let app = Router::new()
+    .route("/", get(root))
+    .route("/stats", get(get_stats).with_state(tracker.clone())
+);
 
     let server = axum::Server::bind(&socket_addr).serve(app.into_make_service());
 

tests/tracker_api.rs

@@ -582,18 +582,69 @@ mod tracker_apis {
 
     mod for_entrypoint {
         use crate::api::client::{Client, Query};
-        use crate::api::server::start_default_api_server;
+        use crate::api::server::start_default_api;
         use crate::api::Version;
 
         #[tokio::test]
         async fn test_entrypoint() {
-            let api_server = start_default_api_server(&Version::Axum).await;
+            let api_server = start_default_api(&Version::Axum).await;
 
             let response = Client::new(api_server.get_connection_info(), &Version::Axum)
-                .get("/", Query::default())
+                .get("", Query::default())
                 .await;
 
             assert_eq!(response.status(), 200);
         }
     }
+
+    mod for_stats_resources {
+        use std::str::FromStr;
+
+        use torrust_tracker::api::resource::stats::Stats;
+        use torrust_tracker::protocol::info_hash::InfoHash;
+
+        use crate::api::client::Client;
+        use crate::api::fixtures::sample_peer;
+        use crate::api::server::start_default_api;
+        use crate::api::Version;
+
+        #[tokio::test]
+        async fn should_allow_getting_tracker_statistics() {
+            let api_server = start_default_api(&Version::Axum).await;
+
+            api_server
+                .add_torrent(
+                    &InfoHash::from_str("9e0217d0fa71c87332cd8bf9dbeabcb2c2cf3c4d").unwrap(),
+                    &sample_peer(),
+                )
+                .await;
+
+            let response = Client::new(api_server.get_connection_info(), &Version::Axum)
+                .get_tracker_statistics()
+                .await;
+
+            assert_eq!(response.status(), 200);
+            assert_eq!(
+                response.json::<Stats>().await.unwrap(),
+                Stats {
+                    torrents: 1,
+                    seeders: 1,
+                    completed: 0,
+                    leechers: 0,
+                    tcp4_connections_handled: 0,
+                    tcp4_announces_handled: 0,
+                    tcp4_scrapes_handled: 0,
+                    tcp6_connections_handled: 0,
+                    tcp6_announces_handled: 0,
+                    tcp6_scrapes_handled: 0,
+                    udp4_connections_handled: 0,
+                    udp4_announces_handled: 0,
+                    udp4_scrapes_handled: 0,
+                    udp6_connections_handled: 0,
+                    udp6_announces_handled: 0,
+                    udp6_scrapes_handled: 0,
+                }
+            );
+        }
+    }
 }