feat: add leptos

Signed-off-by: kjuulh <contact@kjuulh.io>

examples/leptos-build/testdata/crates/hackernews_axum/src/handlers.rs

@@ -0,0 +1,63 @@
+use cfg_if::cfg_if;
+
+cfg_if! {
+if #[cfg(feature = "ssr")] {
+    use axum::{
+        body::{boxed, Body, BoxBody},
+        http::{Request, Response, StatusCode, Uri},
+    };
+    use tower::ServiceExt;
+    use tower_http::services::ServeDir;
+
+    pub async fn file_handler(uri: Uri) -> Result<Response<BoxBody>, (StatusCode, String)> {
+        let res = get_static_file(uri.clone(), "/pkg").await?;
+
+        if res.status() == StatusCode::NOT_FOUND {
+            // try with `.html`
+            // TODO: handle if the Uri has query parameters
+            match format!("{}.html", uri).parse() {
+                Ok(uri_html) => get_static_file(uri_html, "/pkg").await,
+                Err(_) => Err((StatusCode::INTERNAL_SERVER_ERROR, "Invalid URI".to_string())),
+            }
+        } else {
+            Ok(res)
+        }
+    }
+
+    pub async fn get_static_file_handler(uri: Uri) -> Result<Response<BoxBody>, (StatusCode, String)> {
+        let res = get_static_file(uri.clone(), "/static").await?;
+
+        if res.status() == StatusCode::NOT_FOUND {
+          Err((StatusCode::INTERNAL_SERVER_ERROR, "Invalid URI".to_string()))
+        } else {
+            Ok(res)
+        }
+    }
+
+    async fn get_static_file(uri: Uri, base: &str) -> Result<Response<BoxBody>, (StatusCode, String)> {
+        let req = Request::builder().uri(&uri).body(Body::empty()).unwrap();
+
+        // `ServeDir` implements `tower::Service` so we can call it with `tower::ServiceExt::oneshot`
+        // When run normally, the root should be the crate root
+        if base == "/static" {
+            match ServeDir::new("./static").oneshot(req).await {
+                Ok(res) => Ok(res.map(boxed)),
+                Err(err) => Err((
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    format!("Something went wrong: {}", err),
+                ))
+        }
+        } else if base == "/pkg" {
+            match ServeDir::new("./pkg").oneshot(req).await {
+                Ok(res) => Ok(res.map(boxed)),
+                Err(err) => Err((
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    format!("Something went wrong: {}", err),
+                )),
+        }
+    } else{
+           Err((StatusCode::NOT_FOUND, "Not Found".to_string()))
+        }
+    }
+    }
+}