From ec303c95c93ccafe4e7fd791207c82c83c4e1ab4 Mon Sep 17 00:00:00 2001
From: Felipe Trost <felipe.trost@gmail.com>
Date: Thu, 17 Apr 2025 15:17:18 +0200
Subject: [PATCH 1/2] exponential backoff for ws reconnection

---
 src/snapcontrol.ts | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/snapcontrol.ts b/src/snapcontrol.ts
index fea3ff6..28a01d3 100644
--- a/src/snapcontrol.ts
+++ b/src/snapcontrol.ts
@@ -261,6 +261,7 @@ class SnapControl {
         this.msg_id = 0;
         this.status_req_id = -1;
         this.timer = null;
+        this.reconnection_attempts = 0;
     }
 
     public connect(baseUrl: string) {
@@ -269,6 +270,7 @@ class SnapControl {
             this.connection = new WebSocket(baseUrl + '/jsonrpc');
             this.connection.onmessage = (msg: MessageEvent) => this.onMessage(msg.data);
             this.connection.onopen = () => {
+                this.reconnection_attempts = 0;
                 this.status_req_id = this.sendRequest('Server.GetStatus');
                 if (this.onConnectionChanged)
                     this.onConnectionChanged(this, true);
@@ -277,17 +279,22 @@ class SnapControl {
             this.connection.onclose = () => {
                 if (this.onConnectionChanged)
                     this.onConnectionChanged(this, false, 'Connection lost, trying to reconnect.');
-                console.info('connection lost, reconnecting in 1s');
-                this.timer = setTimeout(() => this.connect(baseUrl), 1000);
+                const reconnectionDelay = this.getReconnectDelay();
+                this.timer = setTimeout(() => this.connect(baseUrl), reconnectionDelay * 1000);
             };
         } catch (e) {
-            console.info('Exception while connecting: "' + e + '", reconnecting in 1s');
+            const reconnectionDelay = this.getReconnectDelay();
+            console.info('Exception while connecting: "' + e + '", reconnecting in ' + reconnectionDelay + 's');
             if (this.onConnectionChanged)
                 this.onConnectionChanged(this, false, 'Exception while connecting: "' + e + '", trying to reconnect.');
-            this.timer = setTimeout(() => this.connect(baseUrl), 1000);
+            this.timer = setTimeout(() => this.connect(baseUrl), reconnectionDelay * 1000);
         }
     }
 
+    private getReconnectDelay() {
+        return 1.2 ** this.reconnection_attempts++ - 1;
+    }
+
     public disconnect() {
         if (this.timer)
             clearTimeout(this.timer);
@@ -298,6 +305,7 @@ class SnapControl {
             }
         }
         if (this.onConnectionChanged)
+          
             this.onConnectionChanged(this, false);
     }
 
@@ -532,6 +540,7 @@ class SnapControl {
     msg_id: number;
     status_req_id: number;
     timer: ReturnType<typeof setTimeout> | null;
+    reconnection_attempts: number
 }
 
 

From 0b11c85a15daab02fd03ebf7ebfd031dba3ea9cc Mon Sep 17 00:00:00 2001
From: Felipe Trost <felipe.trost@gmail.com>
Date: Thu, 17 Apr 2025 18:00:05 +0200
Subject: [PATCH 2/2] slower backoff + max 1s backoff

---
 src/snapcontrol.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/snapcontrol.ts b/src/snapcontrol.ts
index 28a01d3..8f64198 100644
--- a/src/snapcontrol.ts
+++ b/src/snapcontrol.ts
@@ -292,7 +292,7 @@ class SnapControl {
     }
 
     private getReconnectDelay() {
-        return 1.2 ** this.reconnection_attempts++ - 1;
+        return Math.min(1.1 ** this.reconnection_attempts++ - 1, 1);
     }
 
     public disconnect() {