From 370080022c880ae8d09b5391aceb49487a2d7398 Mon Sep 17 00:00:00 2001
From: MichaelDaum <github@michaeldaumconsulting.com>
Date: Tue, 14 Nov 2017 13:47:05 +0100
Subject: [PATCH] cherry-picked fix for issue #303

---
 lib/slack.js | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/slack.js b/lib/slack.js
index 5de4306e..b83de7a1 100644
--- a/lib/slack.js
+++ b/lib/slack.js
@@ -59,13 +59,17 @@ export default class SlackData extends EventEmitter {
     return channel ? channel.id: null
   }
 
-  retry (){
-    let interval = this.interval * 2
-    setTimeout(this.fetch.bind(this), interval)
-    this.emit('retry')
+  retry(delay = this.interval * 2) {
+    setTimeout(this.fetch.bind(this), delay);
+    this.emit('retry');
   }
 
   onres (err, res){
+    // Too Many Requests
+    if (res.status === 429) {
+      return this.retry(res.headers['retry-after'] * 1000);
+    }
+
     if (err) {
       this.emit('error', err)
       return this.retry()