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    <p>This is because you use MemoryStore (default) for sessions. Look at this code from memory.js (part of Connect framework):</p> <pre><code>var MemoryStore = module.exports = function MemoryStore() { this.sessions = {}; }; </code></pre> <p>and this snippet from session.js (Express)</p> <pre><code>function session(options){ /* some code */ , store = options.store || new MemoryStore /* some code */ } </code></pre> <p>Now you should understand that every server restart resets the MemoryStore. In order to keep the data you have to use some other session store. You can even write your own (shouldn't be too difficult), although Redis (see <a href="https://github.com/visionmedia/connect-redis" rel="noreferrer">this library</a>) might be a good choice (and it is well supported by Express).</p> <p><strong>// EDIT</strong></p> <p>According to <a href="http://www.senchalabs.org/connect/middleware-session.html" rel="noreferrer">the Connect documentation</a> it is enough for you if you implement <code>get</code>, <code>set</code> and <code>destroy</code> methods. The following code should work:</p> <pre><code>customStore = { get : function(sid, callback) { // custom code, for example calling MongoDb }, set : function(sid, session, callback) { // custom code }, destroy : function(sid, callback) { // custom code } } app.use(express.session({ store: customStore })); </code></pre> <p>You just need to implement calling MongoDb (or any other Db although I still recommend using nonpermament one like Redis) for storing session data. Also read the source code of other implementations to grab the idea.</p>
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    1. PONode.js + express.js + passport.js : stay authenticated between server restart
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    1. COThank you. As you can see, I've tried using connect-mongodb (and connect-mongo) without success, the sessions aren't saved in my db.
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    2. CO@ArnaudRinquin Sorry, somehow I didn't see that. :) I've updated the answer. I am not familiar with neither connect-mongodb nor connect-mongo (I'm using mongoose with Redis as a session store) so the only advice I have for you is this: try implementing the session store yourself.
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    3. COThank you for your help but I've found the solution few minutes ago and saw your response as I wanted to post the solution.
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