From 8fd5143f9961e51727261e206e15a693e117148e Mon Sep 17 00:00:00 2001
From: AlexandreRouma <alexandre.rouma@gmail.com>
Date: Wed, 5 Nov 2025 03:24:28 -0500
Subject: [PATCH] add heartbeat to fix connection closing when idle

---
 user.go             | 3 +++
 www/scripts/user.js | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/user.go b/user.go
index 7e1a5b7..91cda48 100644
--- a/user.go
+++ b/user.go
@@ -223,6 +223,9 @@ func userHandler(sock *websocket.Conn) {
 			// Release the user's display pointer
 			user.displayMtx.Unlock();
 
+		case "hb":
+			// Nothing to do, just a heart beat...
+
 		default:
 			// Give up
 			break;
diff --git a/www/scripts/user.js b/www/scripts/user.js
index 0924dea..5a3fb71 100644
--- a/www/scripts/user.js
+++ b/www/scripts/user.js
@@ -74,6 +74,13 @@ class WisCastUserAPIClient {
                 dispID: dispID,
                 otp: OTP
             }))
+
+            // Send a heart-beat message every 30 seconds
+            setInterval(async () => {
+                await this.#sock.send(JSON.stringify({
+                    type: 'hb',
+                }))
+            }, 30000);
         });
     }