Implement `IntoResponse` for `UsersResponse`

- Manually serialze the UsersResponse to json and set the correct
  content type

Cargo.lock

@@ -1116,6 +1116,7 @@ dependencies = [
  "log",
  "rsa",
  "serde",
+ "serde_json",
  "sha2",
  "tokio",
  "tower-layer",

Cargo.toml

@@ -9,6 +9,7 @@ env_logger = "0.11.8"
 log = "0.4.27"
 rsa = "0.9.8"
 serde = { version = "1.0.219", features = ["derive"] }
+serde_json = "1.0.140"
 sha2 = "0.10.8"
 tokio = { version = "1.44.2", features = ["full"] }
 tower-layer = "0.3.3"

src/main.rs

@@ -46,20 +46,20 @@ async fn fallback(uri: Uri) -> (StatusCode, String) {
 pub struct TraceLayer;
 
 impl<S> Layer<S> for TraceLayer {
-    type Service = LogService<S>;
+    type Service = TraceService<S>;
 
     fn layer(&self, service: S) -> Self::Service {
-        LogService { service }
+        TraceService { service }
     }
 }
 
 // This service implements the Log behavior
 #[derive(Clone)]
-pub struct LogService<S> {
+pub struct TraceService<S> {
     service: S,
 }
 
-impl<S, Request> Service<Request> for LogService<S>
+impl<S, Request> Service<Request> for TraceService<S>
 where
     S: Service<Request>,
     Request: fmt::Debug,

src/users.rs

@@ -1,4 +1,7 @@
-use axum::{Json, extract::Path};
+use axum::{
+    extract::Path,
+    response::{IntoResponse, Response},
+};
 use log::debug;
 use serde::Serialize;
 
@@ -13,14 +16,23 @@ pub struct UsersResponse {
     id: String,
 }
 
-pub async fn users_get(Path(user): Path<String>) -> Json<UsersResponse> {
+pub async fn users_get(Path(user): Path<String>) -> UsersResponse {
     debug!("Got request for actor: {user}");
     assert_eq!(user, USER);
 
-    Json(UsersResponse {
+    UsersResponse {
         context: "https://www.w3.org/ns/activitystreams".to_string(),
         r#type: "Person".to_string(),
         name: "Sally Smith".to_string(),
         id: "https://testhost.com/users/test".to_string(),
-    })
+    }
+}
+
+impl IntoResponse for UsersResponse {
+    fn into_response(self) -> Response {
+        Response::builder()
+            .header("content-type", "application/activity+json; charset=utf-8")
+            .body(serde_json::to_string(&self).unwrap().into())
+            .unwrap()
+    }
 }