From da5036424b963882b23fcf7f1a89388e927d56a9 Mon Sep 17 00:00:00 2001
From: Feross Aboukhadijeh <feross@feross.org>
Date: Sat, 30 May 2015 14:20:42 -0700
Subject: [PATCH] fix exception in websocket tracker

---
 lib/http-tracker.js      | 2 ++
 lib/udp-tracker.js       | 2 ++
 lib/websocket-tracker.js | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/lib/http-tracker.js b/lib/http-tracker.js
index 8d221a9..9a3c1aa 100644
--- a/lib/http-tracker.js
+++ b/lib/http-tracker.js
@@ -44,6 +44,7 @@ function HTTPTracker (client, announceUrl, opts) {
 
 HTTPTracker.prototype.announce = function (opts) {
   var self = this
+  if (self.destroyed) return
   if (self._trackerId) opts.trackerid = self._trackerId
 
   if (opts.compact == null) opts.compact = 1
@@ -58,6 +59,7 @@ HTTPTracker.prototype.announce = function (opts) {
 
 HTTPTracker.prototype.scrape = function (opts) {
   var self = this
+  if (self.destroyed) return
 
   if (!self._scrapeUrl) {
     self.client.emit('error', new Error('scrape not supported ' + self._announceUrl))
diff --git a/lib/udp-tracker.js b/lib/udp-tracker.js
index b090da8..0f0fb25 100644
--- a/lib/udp-tracker.js
+++ b/lib/udp-tracker.js
@@ -39,11 +39,13 @@ function UDPTracker (client, announceUrl, opts) {
 
 UDPTracker.prototype.announce = function (opts) {
   var self = this
+  if (self.destroyed) return
   self._request(opts)
 }
 
 UDPTracker.prototype.scrape = function (opts) {
   var self = this
+  if (self.destroyed) return
   opts._scrape = true
   self._request(opts) // udp scrape uses same announce url
 }
diff --git a/lib/websocket-tracker.js b/lib/websocket-tracker.js
index 0e0966e..b341548 100644
--- a/lib/websocket-tracker.js
+++ b/lib/websocket-tracker.js
@@ -46,6 +46,7 @@ function WebSocketTracker (client, announceUrl, opts) {
 
 WebSocketTracker.prototype.announce = function (opts) {
   var self = this
+  if (self.destroyed) return
   if (!self._socket.connected) {
     return self._socket.once('connect', self.announce.bind(self, opts))
   }
@@ -69,6 +70,7 @@ WebSocketTracker.prototype.announce = function (opts) {
 
 WebSocketTracker.prototype.scrape = function (opts) {
   var self = this
+  if (self.destroyed) return
   self._onSocketError(new Error('scrape not supported ' + self._announceUrl))
 }