Reading Cookies from Express Middleware - node.js

Question

I'm making an app using the Express and Unblocker modules, along with CookieParser for cookie reading. I have a simple system where an if statement read req.cookies.visits and sees if it is 0 or undefined, then redirects to a password screen. However, a problem arises when the Unblocker module is taken into account. Doing
app.get('/proxy', function(req, res){
if(req.cookies.visits==0||req.cookies.visits==undefined){
res.redirect("/password");
} else {
res.sendFile(__dirname + '/public/index.html');
}
});
doesn't read the cookie for when the request is made (because the route is /proxy/http address). I've tried using express middleware, but doing req.cookie.visits results in an undefined error. Unblocker also has a built in middleware functionality, but the page on npm only shows how to do a response and not a request.
Basically, how could I read a cookie with every request and be compatible with this module?

Answer 1

Check out a full example with middleware :
const express = require('express')
const app = express();
const port = 3000;
var Unblocker = require('unblocker');
const cookieParser = require("cookie-parser");
app.use(cookieParser());
app.use(new Unblocker({prefix: '/proxy/'}));
function checkVisits(req,res,next){
let visits;
try {
visits = req.cookies.visits;
if(isNaN(visits)){
visits = 0;
}
console.log("visits:" + visits);
} catch {
console.log("no visits");
visits = 0;
}finally{
if(visits === 0){
res.redirect("/password");
return;
}
res.visits = parseInt(visits)+1;
res.cookie('visits',res.visits, { maxAge: 900000, httpOnly: true });
return next();
}
}
//add checkVisits(req,res,next) as a middleware
app.get('/index',checkVisits, function (req, res) {
res.send('index visits:'+res.visits);
})
//add checkVisits(req,res,next) as a middleware
app.get('/home',checkVisits, function (req, res) {
res.send('home visits:'+res.visits);
})
app.get('/password', function (req, res) {
res.send('password page');
})
app.listen(port, () => console.log("App listening on port %s!", port))
The checkVisits(req,res,next) middleware will check for visits cookie. If visits cookies is 0 the user will redirected to route /password .