relay: only send if socket is open

src/controllers/api/streaming.ts

@@ -1,5 +1,4 @@
 import { AppController } from '@/app.ts';
-import { type Event } from '@/deps.ts';
 import { type DittoFilter } from '@/filter.ts';
 import { TOKEN_REGEX } from '@/middleware/auth19.ts';
 import { streamSchema, ws } from '@/stream.ts';

src/controllers/nostr/relay.ts

@@ -90,7 +90,9 @@ function connectStream(socket: WebSocket) {
 
   /** Send a message back to the client. */
   function send(msg: RelayMsg): void {
-    return socket.send(JSON.stringify(msg));
+    if (socket.readyState === WebSocket.OPEN) {
+      socket.send(JSON.stringify(msg));
+    }
   }
 }