From e49ef3ef8753cee38ac622ab61287917265abfc8 Mon Sep 17 00:00:00 2001
From: achwie <achwie@users.noreply.github.com>
Date: Fri, 28 Jul 2017 16:21:20 +0200
Subject: [PATCH] Added support for Redis as session store (via env variable
 SESSION_STORE_TYPE). Fixes Haufe-Lexware/wicked.haufe.io#83

---
 app.js          |  7 ++-----
 sessionstore.js | 28 ++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 5 deletions(-)
 create mode 100644 sessionstore.js

diff --git a/app.js b/app.js
index a8f21dd..3061b38 100644
--- a/app.js
+++ b/app.js
@@ -32,16 +32,13 @@ var correlationIdHandler = wicked.correlationIdHandler();
 var passport = require('passport');
 var fs = require('fs');
 var session = require('express-session');
-var FileStore = require('session-file-store')(session);
-
-// Use default options, see https://www.npmjs.com/package/session-file-store
-var sessionStoreOptions = {};
+var sessionStore = require('./sessionstore')(session);
 
 var SECRET = 'ThisIsASecret';
 
 // Session: 15 minutes
 var sessionArgs = {
-    store: new FileStore(sessionStoreOptions),
+    store: sessionStore,
     secret: SECRET,
     saveUninitialized: true,
     resave: false,
diff --git a/sessionstore.js b/sessionstore.js
new file mode 100644
index 0000000..e085015
--- /dev/null
+++ b/sessionstore.js
@@ -0,0 +1,28 @@
+var debug = require('debug')('portal:app');
+
+function initSessionStore(session){
+    var sessionStoreType = process.env.SESSION_STORE_TYPE || 'file';
+
+    var sessionStoreOptions = {};
+    var SessionStore;
+    switch (sessionStoreType){
+        case 'file':
+            SessionStore = require('session-file-store')(session);
+            // Use default options for file session store, see https://www.npmjs.com/package/session-file-store
+            break;
+        case 'redis':
+            SessionStore = require('connect-redis')(session);
+            // Set options for Redis session store, see https://www.npmjs.com/package/connect-redis
+            sessionStoreOptions.host = process.env.SESSION_STORE_HOST || 'localhost';
+            sessionStoreOptions.port = process.env.SESSION_STORE_PORT || 6379;
+            break;
+        default:
+            throw new Error("Invalid session-store type: '" + sessionStoreType + "'");
+    }
+
+    debug('Using session store \'' + sessionStoreType + '\' with options ' + JSON.stringify(sessionStoreOptions));
+
+    return new SessionStore(sessionStoreOptions);
+}
+
+module.exports = initSessionStore;
\ No newline at end of file