Correct parsing of Set-Cookie for arrays

Author: ricellis

CHANGES.md

@@ -1,3 +1,6 @@
+# Unreleased
+- [FIXED] Parsing of max-age from Set-Cookie headers.
+
 # 4.3.1 (2021-03-17)
 - [NEW] Add migration guide to the newly supported cloudant-node-sdk
   (package: @ibm-cloud/cloudant).

lib/tokens/TokenManager.js

@@ -1,4 +1,4 @@
-// Copyright © 2019 IBM Corp. All rights reserved.
+// Copyright © 2019, 2021 IBM Corp. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -32,7 +32,9 @@ class TokenManager {
   _autoRenew(defaultMaxAgeSecs) {
     debug('Auto renewing token now...');
     this._renew().then((response) => {
-      let maxAgeSecs = cookie.parse(response.headers['set-cookie'][0])['Max-Age'] || defaultMaxAgeSecs;
+      let setCookieHeader = response.headers['set-cookie'];
+      let headerValue = Array.isArray(setCookieHeader) ? setCookieHeader[0] : setCookieHeader;
+      let maxAgeSecs = cookie.parse(headerValue)['Max-Age'] || defaultMaxAgeSecs;
       let delayMSecs = maxAgeSecs / 2 * 1000;
       debug(`Renewing token in ${delayMSecs} milliseconds.`);
       setTimeout(this._autoRenew.bind(this, defaultMaxAgeSecs), delayMSecs).unref();