How to handle a get request with node.js (express)

You can take the id from params and after this to return a response based on that id.

var express = require('express');var app = express();app.get("/page/:id",function(request, response){    var id = request.params.id;    // do something with id    // send a response to user based on id    var obj = { id : id, Content : "content " +id };    response.writeHead(200, {"Content-Type": "application/json"});    response.write(JSON.stringify(obj));});

Notes:

1. You use /page/:id to make urls like www.mywebsite.com/page/22 or www.mywebsite.com/page?id=22 and you can have acces to id on server with request.params.id (output: 22).

2. With response you can write a response to the server. In this example i returned a json object.

3. In writeHead 200 come from status which means OK , and content-type means that I return a json object

4. You can return what you want, a page or something else, this is just an example (PoC).

If you want to pass multiple variables in the request, you can pass it in the following way:

var emailVar = "someEmail@gmail.com";var nameVar = "someName";var url = `/home?email=${emailVar}&name=${nameVar}`;//Now make the request.

and in the backend logic, you can retrieve these values as:

app.get('/home', function(request, response){    console.log(request.query.email+"  "+request.query.name);    var email = request.query.email;    var name = request.query.name;    response.setHeader('Content-Type', 'application/json');    if(request.query.email)    {        response.send(JSON.stringify({            message: 'Got the email'        }));    }    else    {        response.send(JSON.stringify({            message: 'No email sent'        }));    }});

This approach is useful for performing query operations in the backend.