Node.js - How to deploy an application in Azure

In this post, we will see how to deploy a Node.js application in Azure, using Visual Studio Code.

First of all, we have to create a Web App in Azure.
We open a browser, go to Azure portal and we select the item “Create a resource”:

then, we select the resource “Web App”:

Now, we create the Web App using these parameters:

Finally, in order to create the Web App, we push on “Review + create” button and then on the “Create” button:

We have completed all steps in Azure and now, we will create our Node.js application.
We create a folder called “NodeAppInAzure” and then, with the command npm init,
we will initialize a Node.js project:

Then we create a file called “index.js”:

[INDEX.JS]

// import the module http
var http = require('http');
 
// we define the port using the environment variable called process.env.PORT
var port = process.env.PORT || 8080;
 
// creation of the Server
var serverweb = http.createServer(function(request, response){
    // definition of the status code to send at the header
    var codhead= 200;
    // definition of the output message
    var message = "The call was done from ";
    // with request.url it is possible to know the part of the url after domain 
    switch (request.url)
    {
        case "/api":
                message = message + "API";
                break;
        case "/test":
                message = message + "TEST";
                break;
        case "/":
                message = message + "ROOT";
                break;
        default:
                message = "This position isn't known";
                codhead = 404;
                break;
    }
    // it sends a status code and information to the client
    response.writeHead(codhead, {"Content-Type": "text/html"});
    // text shown in the page 
    response.write("<b>" + message + "</b>");
    response.end();
}).listen(port);  