From 02fd4199554473aa60bbdbee831bca3576c29283 Mon Sep 17 00:00:00 2001
From: Sour Dusk <dusk@sourk9.com>
Date: Wed, 27 Aug 2025 00:44:26 +0000
Subject: [PATCH] feat: add 10 second JSON-RPC ping to keep websockets alive
 across certain reverse proxies.

---
 src/networking/messageGenerators.ts | 8 ++++++++
 src/networking/webSocket.ts         | 5 +++++
 2 files changed, 13 insertions(+)

diff --git a/src/networking/messageGenerators.ts b/src/networking/messageGenerators.ts
index 86b9d35..e7e86eb 100644
--- a/src/networking/messageGenerators.ts
+++ b/src/networking/messageGenerators.ts
@@ -49,6 +49,14 @@ export function requestFilenames(): Message {
   };
 }
 
+export function ping(): Message {
+  return {
+    jsonrpc: "2.0",
+    method: "ping",
+    id: messageCounter++,
+  };
+}
+
 function addLeadingSlash(path: string): string {
   const slashes = path.match("/");
   if (slashes) return `/${path}`;
diff --git a/src/networking/webSocket.ts b/src/networking/webSocket.ts
index 9f26b17..ae39c79 100644
--- a/src/networking/webSocket.ts
+++ b/src/networking/webSocket.ts
@@ -4,6 +4,7 @@ import { config } from "../config.js";
 import { EventType } from "../eventTypes.js";
 import { Message } from "../interfaces.js";
 import { messageTracker } from "./messageTracker.js";
+import { ping } from "./messageGenerators.js";
 
 export function setupSocket(signaller: Signal) {
   const wss = new WebSocketServer({ port: config.get("port") });
@@ -23,6 +24,10 @@ export function setupSocket(signaller: Signal) {
     });
 
     signaller.trigger(EventType.ConnectionMade);
+
+    setInterval(() => {
+      sendMessage(ping());
+    }, 10000);
   });
 
   return wss;