How to access session in express, outside of the req?

Question

I know that I can use

function(req, res) {
    req.session
}

using express. However I need to access the session outside of the response func

Answer 1

I think I have a different answer.

code:

var MongoStore = require('connect-mongo')(session);
var mongoStore = new MongoStore({
    db:settings.db,            //these options values may different
    port:settings.port,
    host:settings.host
})
app.use(session({
    store : mongoStore
    //here may be more options,but store must be mongoStore above defined
}));

then you should define a session key at req,just like :

code:

req.session.userEmail;

finally,you can get it this way:

code:

var cookie = require("cookie"); //it may be defined at the top of the file
io.on("connection",function(connection){

 var tS = cookie.parse(connection.handshake.headers.cookie)['connect.sid'];
 var sessionID = tS.split(".")[0].split(":")[1];
 mongoStore.get(sessionID,function(err,session){
      console.log(session.userEmail);
 });
}

I had test it yesterday, it worked well.