v0.03

backend/src/main.rs

@@ -1,4 +1,9 @@
-use axum::{response::IntoResponse, routing::get, Json, Router};
+use axum::{
+    http::{HeaderValue, Method},
+    response::IntoResponse,
+    routing::get,
+    Json, Router,
+};
 use axum_extra::routing::SpaRouter;
 use clap::Parser;
 use serde::{Deserialize, Serialize};
@@ -6,6 +11,7 @@ use std::collections::HashMap;
 use std::net::{IpAddr, Ipv6Addr, SocketAddr};
 use std::str::FromStr;
 use tower::ServiceBuilder;
+use tower_http::cors::CorsLayer;
 use tower_http::trace::TraceLayer;
 
 #[derive(Deserialize, Serialize, Debug)]
@@ -95,7 +101,18 @@ async fn main() {
     let app = Router::new()
         .route("/api/hello", get(hello))
         .merge(SpaRouter::new("/assets", opt.static_dir))
-        .layer(ServiceBuilder::new().layer(TraceLayer::new_for_http()));
+        .layer(ServiceBuilder::new().layer(TraceLayer::new_for_http()))
+        .layer(
+            // see https://docs.rs/tower-http/latest/tower_http/cors/index.html
+            // for more details
+            //
+            // pay attention that for some request types like posting content-type: application/json
+            // it is required to add ".allow_headers([http::header::CONTENT_TYPE])"
+            // or see this issue https://github.com/tokio-rs/axum/issues/849
+            CorsLayer::new()
+                .allow_origin("http://localhost:8080".parse::<HeaderValue>().unwrap())
+                .allow_methods([Method::GET]),
+        );
 
     let sock_addr = SocketAddr::from((
         IpAddr::from_str(opt.addr.as_str()).unwrap_or(IpAddr::V6(Ipv6Addr::LOCALHOST)),