From 3fcf54ff361d4563445e295212c362d5b1e6c518 Mon Sep 17 00:00:00 2001
From: Nick Uraltsev <nick.uraltsev@gmail.com>
Date: Mon, 17 Oct 2016 18:20:13 -0700
Subject: [PATCH] Fixing issue with calling cancel after response has been
 received

---
 lib/adapters/http.js      |  4 ++++
 lib/adapters/xhr.js       |  4 ++++
 test/specs/cancel.spec.js | 23 +++++++++++++++++++++++
 3 files changed, 31 insertions(+)

diff --git a/lib/adapters/http.js b/lib/adapters/http.js
index 95e4e8c..5d6c7f9 100644
--- a/lib/adapters/http.js
+++ b/lib/adapters/http.js
@@ -188,6 +188,10 @@ module.exports = function httpAdapter(config) {
     if (config.cancelToken) {
       // Handle cancellation
       config.cancelToken.promise.then(function onCanceled(cancel) {
+        if (aborted) {
+          return;
+        }
+
         req.abort();
         reject(cancel);
         aborted = true;
diff --git a/lib/adapters/xhr.js b/lib/adapters/xhr.js
index 1fb890b..1174a86 100644
--- a/lib/adapters/xhr.js
+++ b/lib/adapters/xhr.js
@@ -156,6 +156,10 @@ module.exports = function xhrAdapter(config) {
     if (config.cancelToken) {
       // Handle cancellation
       config.cancelToken.promise.then(function onCanceled(cancel) {
+        if (!request) {
+          return;
+        }
+
         request.abort();
         reject(cancel);
         // Clean up request
diff --git a/test/specs/cancel.spec.js b/test/specs/cancel.spec.js
index d02d8e3..bb84baf 100644
--- a/test/specs/cancel.spec.js
+++ b/test/specs/cancel.spec.js
@@ -63,4 +63,27 @@ describe('cancel', function() {
       });
     });
   });
+
+  describe('when called after response has been received', function() {
+    // https://github.com/mzabriskie/axios/issues/482
+    it('does not cause unhandled rejection', function (done) {
+      var source = CancelToken.source();
+      axios.get('/foo', {
+        cancelToken: source.token
+      }).then(function () {
+        window.addEventListener('unhandledrejection', function () {
+          done.fail('Unhandled rejection.');
+        });
+        source.cancel();
+        setTimeout(done, 100);
+      });
+
+      getAjaxRequest().then(function (request) {
+        request.respondWith({
+          status: 200,
+          responseText: 'OK'
+        });
+      });
+    });
+  });
 });