Serve schema

src/main.rs

@@ -19,11 +19,46 @@ struct HandlerPath {
     filename: Option<String>,
 }
 
-async fn handler(path: web::Path<HandlerPath>) -> impl Responder {
-    let filename = path.filename.as_deref().unwrap_or("index.html");
+#[derive(Debug, Clone, Eq, PartialEq)]
+struct Schema(String);
 
-    match swagger_ui::Assets::get(filename) {
-        Some(f) => HttpResponse::Ok().body(f.to_vec()),
+async fn handler(path: web::Path<HandlerPath>, schema: web::Data<Schema>) -> impl Responder {
+    let filename: &str = path.filename.as_deref().unwrap_or("index.html");
+
+    let ext = filename
+        .rsplit_once('.')
+        .map(|r| r.1).unwrap_or_default();
+
+    let content_type = match ext {
+        "js" => "application/javascript",
+        "css" => "text/css",
+        "html" => "text/html",
+        "png" => "image/png",
+        "json" => "application/json",
+        "yml" | "yaml" => "application/x-yaml",
+        _ => "text/plain"
+    };
+
+    let filebytes = if filename.eq("schema.yaml") {
+        Some(schema.0.as_bytes().to_vec())
+    } else {
+        swagger_ui::Assets::get(filename).map(|f| f.to_vec())
+    };
+
+    match filebytes {
+        Some(f) => {
+            let mut bytes = f.to_vec();
+
+            if filename.eq("index.html") {
+                bytes = String::from_utf8_lossy(&bytes).to_string()
+                    .replace("https://petstore.swagger.io/v2/swagger.json", "/schema.yaml")
+                    .as_bytes().to_vec();
+            }
+
+            HttpResponse::Ok()
+                .insert_header(("Content-Type", content_type))
+                .body(bytes)
+        }
         None => HttpResponse::NotFound().body("404 not found"),
     }
 }
@@ -35,8 +70,13 @@ async fn main() -> std::io::Result<()> {
 
     log::info!("Will listen on http://{}/", args.listen_address);
 
-    HttpServer::new(|| {
+    let schema = Schema(std::fs::read_to_string(args.schema)
+        .expect("Failed to read schema!"));
+
+    HttpServer::new(move || {
         App::new()
+            .app_data(web::Data::new(schema.clone()))
+
             .route("/", web::get().to(handler))
             .route("/{filename}", web::get().to(handler))
     })