feat(responder): add NotFound responder

crates/http/src/handler/mod.rs

@@ -37,8 +37,8 @@ use std::future::Future;
 /// * `RespBody`: The response body type that implements [`Body`]
 /// * `Error`: The error type that can be converted into a boxed error
 /// * `Fut`: The future type returned by the handler
-#[trait_variant::make(Handler: Send)]
-pub trait LocalHandler: Sync {
+#[trait_variant::make(Send)]
+pub trait Handler: Sync {
     /// The type of the response body
     type RespBody: Body;
 

crates/web/examples/return_uid.rs

@@ -1,7 +1,7 @@
-use http::StatusCode;
 use micro_web::date::DateServiceDecorator;
 use micro_web::router::{get, post, Router};
-use micro_web::{handler_fn, PathParams, Server};
+use micro_web::{handler_fn, responder, PathParams, Server};
+use micro_web::responder::Responder;
 
 async fn empty_body() -> &'static str {
     ""
@@ -11,8 +11,8 @@ async fn echo_uid<'s, 'r>(path_params: &PathParams<'s, 'r>) -> String {
     path_params.get("id").map(|s| s.to_owned()).unwrap()
 }
 
-async fn default_handler() -> (&'static str, StatusCode) {
-    ("404 not found", StatusCode::NOT_FOUND)
+async fn default_handler() -> impl Responder {
+    responder::NotFound
 }
 
 #[tokio::main]

crates/web/src/lib.rs

@@ -102,10 +102,10 @@ mod body;
 mod fn_trait;
 mod handler;
 mod request;
-mod responder;
 mod server;
 
 // Public modules
+pub mod responder;
 pub mod date;
 pub mod decorator;
 pub mod encoding;

crates/web/src/responder.rs

@@ -115,3 +115,12 @@ impl Responder for Infallible {
         unreachable!()
     }
 }
+
+pub struct NotFound;
+
+impl Responder for NotFound {
+    #[inline]
+    fn response_to(self, req: &RequestContext) -> Response<ResponseBody> {
+        ("404 Not Found.", StatusCode::NOT_FOUND).response_to(req)
+    }
+}