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Demonstration of how user session can be persisted across redirects, with an express server and request client.
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| var express = require('express') | |
| var session = require('express-session') | |
| var app = express() | |
| var r = require('request') | |
| // By default cookies are disabled, switch it on | |
| var request = r.defaults( { jar:true } ) | |
| app.use(session({ secret: 'keyboard cat',saveUninitialized : false, resave : false, cookie: { maxAge: 60000 }})) | |
| app.get('/', function(req, res, next) { | |
| if(!req.session.views) { | |
| req.session.views = 1 | |
| console.log('first timer : '+ req.session.views) | |
| res.end('first timer') | |
| } else { | |
| req.session.views++ | |
| console.log('subsequent views: ' + req.session.views) | |
| req.session.extra = "some extra data" | |
| // While sessions with memoryStore may work fine with multiple requests/redirects, external | |
| // stores can cause race conditions - between next client request and the store, depending | |
| // on who runs faster. So save the session explicitly, prior to the response/redirect. | |
| req.session.save(function(err) { | |
| if(err) { | |
| res.end('session save error: ' + err) | |
| return | |
| } | |
| res.redirect('/admin') | |
| }) | |
| } | |
| }) | |
| app.get('/admin', function(req, res, next) { | |
| console.log(`in redirected route, views: ${req.session.views} and extra: ${req.session.extra}`) | |
| res.end('redirected response') | |
| }) | |
| app.listen(8000, () => { | |
| request.get('http://localhost:8000', (err,res,body) => { | |
| console.log(`first response : ${body}`) | |
| request.get('http://localhost:8000', (err,res,body) => { | |
| console.log(`second response : ${body}`) | |
| }) | |
| }) | |
| }) |
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