opencode fixed my connection errors :)

src/lib/server/endpoint.ts

@@ -1,34 +1,77 @@
 export async function generateEndpoint(
-	startFunction?: (enqueue: (data: any) => void) => void | Promise<void | (() => void)>
+	startFunction?: (enqueue: (data: any) => void) => void | Promise<void | (() => void)>,
+	request?: Request
 ) {
 	let streamController: ReadableStreamDefaultController | null = null;
 	let cleanupFunction: (() => void) | void = undefined;
+	let heartbeatInterval: ReturnType<typeof setInterval> | null = null;
+	let cleanedUp = false;
+
+	const safeCleanup = () => {
+		if (cleanedUp) return;
+		cleanedUp = true;
+
+		if (heartbeatInterval) {
+			clearInterval(heartbeatInterval);
+			heartbeatInterval = null;
+		}
+
+		if (typeof cleanupFunction === 'function') {
+			cleanupFunction();
+			cleanupFunction = undefined;
+		}
+	};
 
 	const enqueue = (data: any) => {
+		if (cleanedUp) return;
 		let transferdata = JSON.stringify(data);
-		// stringify data and add to controller queue
 		if (streamController) {
-			streamController.enqueue(`data: ${transferdata}\n\n`);
-		} else {
-			console.log('no controller');
+			try {
+				streamController.enqueue(`data: ${transferdata}\n\n`);
+			} catch {
+				safeCleanup();
+			}
 		}
 	};
 
 	const stream = new ReadableStream({
 		async start(controller) {
 			streamController = controller;
+
+			heartbeatInterval = setInterval(() => {
+				try {
+					streamController!.enqueue(': keepalive\n\n');
+				} catch {
+					safeCleanup();
+				}
+			}, 30000);
+			heartbeatInterval.unref();
+
 			if (startFunction) {
-				const result = await startFunction(enqueue);
-				if (typeof result === 'function') {
-					cleanupFunction = result;
+				try {
+					const result = await startFunction(enqueue);
+					if (typeof result === 'function') {
+						cleanupFunction = result;
+					}
+				} catch (err) {
+					safeCleanup();
+					throw err;
 				}
 			}
 		},
 		async cancel() {
-			if (cleanupFunction) cleanupFunction();
+			safeCleanup();
 		}
 	});
 
+	if (request?.signal) {
+		if (request.signal.aborted) {
+			safeCleanup();
+		} else {
+			request.signal.addEventListener('abort', () => safeCleanup());
+		}
+	}
+
 	return {
 		response: new Response(stream, {
 			headers: {

src/lib/server/globalEmitter.ts

@@ -1,5 +1,4 @@
 import { EventEmitter } from 'node:events';
 
-// Main emitter for everything
-
 export const globalEmitter = new EventEmitter();
+globalEmitter.setMaxListeners(1000);