From 8c5509ceeaa8fc1d1bf5e05a0d78fdde555dd6e5 Mon Sep 17 00:00:00 2001
From: Guiqiang Zhang <skyhit@gmail.com>
Date: Tue, 25 Jul 2017 09:16:48 +0800
Subject: [PATCH 1/2] check v3 token expiration

---
 initializers/v3client.js | 3 ++-
 package.json             | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/initializers/v3client.js b/initializers/v3client.js
index df8312a37..b1e620288 100644
--- a/initializers/v3client.js
+++ b/initializers/v3client.js
@@ -12,6 +12,7 @@
 var request = require('request');
 var _ = require('underscore');
 var async = require('async');
+var tcAccounts = require('tc-accounts');
 
 /**
  * The URL of the V3 API
@@ -63,7 +64,7 @@ function getToken(connection, callback) {
         return;
     }
     // Cached token
-    if (!_.isUndefined(tokens[connection.authToken])) {
+    if (!_.isUndefined(tokens[connection.authToken]) && !tcAccounts.isTokenExpired(tokens[connection.authToken])) {
         callback(null, tokens[connection.authToken]);
         return;
     }
diff --git a/package.json b/package.json
index c3e6dfc2a..84605d1dd 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,8 @@
     "validator": "~3.5.0",
     "wkhtmltoimage": ">= 0.1.3",
     "xml2js": "0.2.x",
-    "xtend": "2.1.x"
+    "xtend": "2.1.x",
+    "tc-accounts": "https://github.com/appirio-tech/accounts-app#dev"
   },
   "devDependencies": {
     "supertest": "0.8.x",

From c50710c02b82c8147756007b04fd7095879270b8 Mon Sep 17 00:00:00 2001
From: Guiqiang Zhang <skyhit@gmail.com>
Date: Tue, 25 Jul 2017 10:43:23 +0800
Subject: [PATCH 2/2] update check token expiration logic

---
 initializers/v3client.js | 66 ++++++++++++++++++++++++++++++++++++++--
 package.json             |  2 +-
 2 files changed, 65 insertions(+), 3 deletions(-)

diff --git a/initializers/v3client.js b/initializers/v3client.js
index b1e620288..21db566dc 100644
--- a/initializers/v3client.js
+++ b/initializers/v3client.js
@@ -12,7 +12,7 @@
 var request = require('request');
 var _ = require('underscore');
 var async = require('async');
-var tcAccounts = require('tc-accounts');
+var atob = require('atob');
 
 /**
  * The URL of the V3 API
@@ -64,7 +64,7 @@ function getToken(connection, callback) {
         return;
     }
     // Cached token
-    if (!_.isUndefined(tokens[connection.authToken]) && !tcAccounts.isTokenExpired(tokens[connection.authToken])) {
+    if (!_.isUndefined(tokens[connection.authToken]) && !isTokenExpired(tokens[connection.authToken])) {
         callback(null, tokens[connection.authToken]);
         return;
     }
@@ -87,6 +87,68 @@ function getToken(connection, callback) {
     });
 }
 
+function urlBase64Decode(str) {
+    var output = str.replace(/-/g, '+').replace(/_/g, '/');
+
+    switch (output.length % 4) {
+        case 0:
+            break;
+
+        case 2:
+            output += '==';
+            break;
+
+        case 3:
+            output += '=';
+            break;
+
+        default:
+            throw 'Illegal base64url string!'
+    }
+    return decodeURIComponent(escape(atob(output)));//polyfill https://github.com/davidchambers/Base64.js
+}
+
+function decodeToken(token) {
+    var parts = token.split('.');
+
+    if (parts.length !== 3) {
+        throw new Error('The token is invalid')
+    }
+
+    var decoded = urlBase64Decode(parts[1]);
+
+    if (!decoded) {
+        throw new Error('Cannot decode the token')
+    }
+
+    return JSON.parse(decoded)
+}
+
+function getTokenExpirationDate(token) {
+    var decoded = decodeToken(token);
+
+    if(typeof decoded.exp === 'undefined') {
+        return null
+    }
+
+    var d = new Date(0);// The 0 here is the key, which sets the date to the epoch
+    d.setUTCSeconds(decoded.exp);
+
+    return d
+}
+
+function isTokenExpired(token) {
+    var d = getTokenExpirationDate(token);
+
+    if (d === null) {
+        return false
+    }
+
+    // Token expired?
+    return !(d.valueOf() > (new Date().valueOf()))
+}
+
+
 /**
  * Get IDs of users in the specified group
  *
diff --git a/package.json b/package.json
index 84605d1dd..d5470d6df 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "wkhtmltoimage": ">= 0.1.3",
     "xml2js": "0.2.x",
     "xtend": "2.1.x",
-    "tc-accounts": "https://github.com/appirio-tech/accounts-app#dev"
+    "atob": "2.0.3"
   },
   "devDependencies": {
     "supertest": "0.8.x",

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