optimize debug log and apply clippy/fmt suggestions

actix-web/examples/introspection.rs

@@ -1,9 +1,37 @@
 // Example showcasing the experimental introspection feature.
 // Run with: `cargo run --features experimental-introspection --example introspection`
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    #[cfg(feature = "experimental-introspection")]
+    {
         use actix_web::{dev::Service, guard, web, App, HttpResponse, HttpServer, Responder};
         use serde::Deserialize;
 
-#[cfg(feature = "experimental-introspection")]
+        // Initialize logging
+        env_logger::Builder::new()
+            .filter_level(log::LevelFilter::Debug)
+            .init();
+
+        // Custom guard to check if the Content-Type header is present.
+        struct ContentTypeGuard;
+
+        impl guard::Guard for ContentTypeGuard {
+            fn check(&self, req: &guard::GuardContext<'_>) -> bool {
+                req.head()
+                    .headers()
+                    .contains_key(actix_web::http::header::CONTENT_TYPE)
+            }
+        }
+
+        // Data structure for endpoints that receive JSON.
+        #[derive(Deserialize)]
+        struct UserInfo {
+            username: String,
+            age: u8,
+        }
+
+        // GET /introspection
         #[actix_web::get("/introspection")]
         async fn introspection_handler() -> impl Responder {
             use std::fmt::Write;
@@ -65,34 +93,123 @@ async fn introspection_handler() -> impl Responder {
 
             HttpResponse::Ok().content_type("text/plain").body(buf)
         }
-
+        // GET /api/v1/item/{id} and GET /v1/item/{id}
-// Custom guard to check if the Content-Type header is present.
+        #[actix_web::get("/item/{id}")]
-struct ContentTypeGuard;
+        async fn get_item(path: web::Path<u32>) -> impl Responder {
-
+            let id = path.into_inner();
-impl guard::Guard for ContentTypeGuard {
+            HttpResponse::Ok().body(format!("Requested item with id: {}", id))
-    fn check(&self, req: &guard::GuardContext<'_>) -> bool {
-        req.head()
-            .headers()
-            .contains_key(actix_web::http::header::CONTENT_TYPE)
-    }
         }
 
-// Data structure for endpoints that receive JSON.
+        // POST /api/v1/info
-#[derive(Deserialize)]
+        #[actix_web::post("/info")]
-struct UserInfo {
+        async fn post_user_info(info: web::Json<UserInfo>) -> impl Responder {
-    username: String,
+            HttpResponse::Ok().json(format!(
-    age: u8,
+                "User {} with age {} received",
+                info.username, info.age
+            ))
         }
 
-#[actix_web::main]
+        // /api/v1/guarded
-async fn main() -> std::io::Result<()> {
+        async fn guarded_handler() -> impl Responder {
-    // Initialize logging
+            HttpResponse::Ok().body("Passed the Content-Type guard!")
-    env_logger::Builder::new()
+        }
-        .filter_level(log::LevelFilter::Debug)
-        .init();
 
+        // GET /api/v2/hello
+        async fn hello_v2() -> impl Responder {
+            HttpResponse::Ok().body("Hello from API v2!")
+        }
+
+        // GET /admin/dashboard
+        async fn admin_dashboard() -> impl Responder {
+            HttpResponse::Ok().body("Welcome to the Admin Dashboard!")
+        }
+
+        // GET /admin/settings
+        async fn get_settings() -> impl Responder {
+            HttpResponse::Ok().body("Current settings: ...")
+        }
+
+        // POST /admin/settings
+        async fn update_settings() -> impl Responder {
+            HttpResponse::Ok().body("Settings have been updated!")
+        }
+
+        // GET and POST on /
+        async fn root_index() -> impl Responder {
+            HttpResponse::Ok().body("Welcome to the Root Endpoint!")
+        }
+
+        // Additional endpoints for /extra
+        fn extra_endpoints(cfg: &mut web::ServiceConfig) {
+            cfg.service(
+                web::scope("/extra")
+                    .route(
+                        "/ping",
+                        web::get().to(|| async { HttpResponse::Ok().body("pong") }), // GET /extra/ping
+                    )
+                    .service(
+                        web::resource("/multi")
+                            .route(web::get().to(|| async {
+                                HttpResponse::Ok().body("GET response from /extra/multi")
+                            })) // GET /extra/multi
+                            .route(web::post().to(|| async {
+                                HttpResponse::Ok().body("POST response from /extra/multi")
+                            })), // POST /extra/multi
+                    )
+                    .service(
+                        web::scope("{entities_id:\\d+}")
+                            .service(
+                                web::scope("/secure")
+                                    .route(
+                                        "",
+                                        web::get().to(|| async {
+                                            HttpResponse::Ok()
+                                                .body("GET response from /extra/secure")
+                                        }),
+                                    ) // GET /extra/{entities_id}/secure/
+                                    .route(
+                                        "/post",
+                                        web::post().to(|| async {
+                                            HttpResponse::Ok()
+                                                .body("POST response from /extra/secure")
+                                        }),
+                                    ), // POST /extra/{entities_id}/secure/post
+                            )
+                            .wrap_fn(|req, srv| {
+                                println!(
+                                    "Request to /extra/secure with id: {}",
+                                    req.match_info().get("entities_id").unwrap()
+                                );
+                                let fut = srv.call(req);
+                                async move {
+                                    let res = fut.await?;
+                                    Ok(res)
+                                }
+                            }),
+                    ),
+            );
+        }
+
+        // Additional endpoints for /foo
+        fn other_endpoints(cfg: &mut web::ServiceConfig) {
+            cfg.service(
+                web::scope("/extra")
+                    .route(
+                        "/ping",
+                        web::post()
+                            .to(|| async { HttpResponse::Ok().body("post from /extra/ping") }), // POST /foo/extra/ping
+                    )
+                    .route(
+                        "/ping",
+                        web::delete()
+                            .to(|| async { HttpResponse::Ok().body("delete from /extra/ping") }), // DELETE /foo/extra/ping
+                    ),
+            );
+        }
+
+        // Create the HTTP server with all the routes and handlers
         let server = HttpServer::new(|| {
-        let mut app = App::new()
+            App::new()
                 // API endpoints under /api
                 .service(
                     web::scope("/api")
@@ -151,129 +268,17 @@ async fn main() -> std::io::Result<()> {
                                 .and(guard::Any(guard::Post())),
                         )
                         .to(HttpResponse::MethodNotAllowed),
-            );
+                )
-
+                .service(introspection_handler)
-        // Register the introspection handler if the feature is enabled.
-        #[cfg(feature = "experimental-introspection")]
-        {
-            app = app.service(introspection_handler); // GET /introspection
-        }
-        app
         })
         .workers(1)
         .bind("127.0.0.1:8080")?;
 
         server.run().await
     }
-
+    #[cfg(not(feature = "experimental-introspection"))]
-// GET /api/v1/item/{id} and GET /v1/item/{id}
+    {
-#[actix_web::get("/item/{id}")]
+        eprintln!("This example requires the 'experimental-introspection' feature to be enabled.");
-async fn get_item(path: web::Path<u32>) -> impl Responder {
+        std::process::exit(1);
-    let id = path.into_inner();
-    HttpResponse::Ok().body(format!("Requested item with id: {}", id))
     }
-
-// POST /api/v1/info
-#[actix_web::post("/info")]
-async fn post_user_info(info: web::Json<UserInfo>) -> impl Responder {
-    HttpResponse::Ok().json(format!(
-        "User {} with age {} received",
-        info.username, info.age
-    ))
-}
-
-// /api/v1/guarded
-async fn guarded_handler() -> impl Responder {
-    HttpResponse::Ok().body("Passed the Content-Type guard!")
-}
-
-// GET /api/v2/hello
-async fn hello_v2() -> impl Responder {
-    HttpResponse::Ok().body("Hello from API v2!")
-}
-
-// GET /admin/dashboard
-async fn admin_dashboard() -> impl Responder {
-    HttpResponse::Ok().body("Welcome to the Admin Dashboard!")
-}
-
-// GET /admin/settings
-async fn get_settings() -> impl Responder {
-    HttpResponse::Ok().body("Current settings: ...")
-}
-
-// POST /admin/settings
-async fn update_settings() -> impl Responder {
-    HttpResponse::Ok().body("Settings have been updated!")
-}
-
-// GET and POST on /
-async fn root_index() -> impl Responder {
-    HttpResponse::Ok().body("Welcome to the Root Endpoint!")
-}
-
-// Additional endpoints for /extra
-fn extra_endpoints(cfg: &mut web::ServiceConfig) {
-    cfg.service(
-        web::scope("/extra")
-            .route(
-                "/ping",
-                web::get().to(|| async { HttpResponse::Ok().body("pong") }), // GET /extra/ping
-            )
-            .service(
-                web::resource("/multi")
-                    .route(
-                        web::get().to(|| async {
-                            HttpResponse::Ok().body("GET response from /extra/multi")
-                        }),
-                    ) // GET /extra/multi
-                    .route(web::post().to(|| async {
-                        HttpResponse::Ok().body("POST response from /extra/multi")
-                    })), // POST /extra/multi
-            )
-            .service(
-                web::scope("{entities_id:\\d+}")
-                    .service(
-                        web::scope("/secure")
-                            .route(
-                                "",
-                                web::get().to(|| async {
-                                    HttpResponse::Ok().body("GET response from /extra/secure")
-                                }),
-                            ) // GET /extra/{entities_id}/secure/
-                            .route(
-                                "/post",
-                                web::post().to(|| async {
-                                    HttpResponse::Ok().body("POST response from /extra/secure")
-                                }),
-                            ), // POST /extra/{entities_id}/secure/post
-                    )
-                    .wrap_fn(|req, srv| {
-                        println!(
-                            "Request to /extra/secure with id: {}",
-                            req.match_info().get("entities_id").unwrap()
-                        );
-                        let fut = srv.call(req);
-                        async move {
-                            let res = fut.await?;
-                            Ok(res)
-                        }
-                    }),
-            ),
-    );
-}
-
-// Additional endpoints for /foo
-fn other_endpoints(cfg: &mut web::ServiceConfig) {
-    cfg.service(
-        web::scope("/extra")
-            .route(
-                "/ping",
-                web::post().to(|| async { HttpResponse::Ok().body("post from /extra/ping") }), // POST /foo/extra/ping
-            )
-            .route(
-                "/ping",
-                web::delete().to(|| async { HttpResponse::Ok().body("delete from /extra/ping") }), // DELETE /foo/extra/ping
-            ),
-    );
 }

actix-web/src/introspection.rs

@@ -195,7 +195,7 @@ pub fn register_rmap(_rmap: &ResourceMap) {
     let tree_representation = registry.display(0);
     log::debug!(
         "Introspection Tree:\n{}",
-        tree_representation.trim_matches('\n').to_string()
+        tree_representation.trim_matches('\n')
     );
 }