Merge pull request #221 from Totodore/doc-salvo-cors

doc(example): add `cors` for `salvo_echo`

examples/salvo-echo/Cargo.toml

@@ -13,7 +13,9 @@ tokio = { workspace = true, features = ["rt-multi-thread", "macros"] }
 tracing-subscriber.workspace = true
 tracing.workspace = true
 serde_json.workspace = true
+tower.workspace = true
+tower-http = { version = "0.5.0", features = ["cors"] }
 
 [[bin]]
 name = "salvo-echo"
-path = "salvo_echo.rs"
+path = "salvo_echo.rs"

examples/salvo-echo/salvo_echo.rs

@@ -5,6 +5,8 @@ use socketioxide::{
     SocketIo,
 };
 
+use tower::ServiceBuilder;
+use tower_http::cors::CorsLayer;
 use tracing::info;
 use tracing_subscriber::FmtSubscriber;
 
@@ -41,6 +43,12 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let (layer, io) = SocketIo::new_layer();
 
+    // This code is used to integrates other tower layers before or after Socket.IO such as CORS
+    // Beware that classic salvo request won't pass through these layers
+    let layer = ServiceBuilder::new()
+        .layer(CorsLayer::permissive()) // Enable CORS policy
+        .layer(layer); // Mount Socket.IO
+
     io.ns("/", on_connect);
     io.ns("/custom", on_connect);