basic network established

crates/gsio-relay/src/lib.rs

@@ -0,0 +1,29 @@
+use futures::StreamExt;
+use worker::*;
+
+#[event(fetch)]
+async fn fetch(req: HttpRequest, _env: Env, _ctx: Context) -> Result<worker::Response> {
+    let upgrade_header = match req.headers().get("Upgrade") {
+        Some(h) => h.to_str().unwrap(),
+        None => "",
+    };
+    if upgrade_header != "websocket" {
+        return worker::Response::error("Expected Upgrade: websocket", 426);
+    }
+
+    let ws = WebSocketPair::new()?;
+    let client = ws.client;
+    let server = ws.server;
+    server.accept()?;
+
+    wasm_bindgen_futures::spawn_local(async move {
+        let mut event_stream = server.events().expect("could not open stream");
+        while let Some(event) = event_stream.next().await {
+            match event.expect("received error in websocket") {
+                WebsocketEvent::Message(msg) => server.send(&format!("echo: {:?}", &msg.text().unwrap())).unwrap(),
+                WebsocketEvent::Close(event) => console_log!("{:?}", event),
+            }
+        }
+    });
+    worker::Response::from_websocket(client)
+}