I have an application that I have behind a reverse proxy, I would like for it to only listen to localhost/127.0.0.1. I expected this to work: app.listen(3001, ‘localhost’); or app.listen(3001, ‘127.0.0.1’); …but instead I get an error: node.js:201 throw e; // process.nextTick error, or ‘error’ event on first tick ^ TypeError: Cannot read property ‘port’ … Read more
I have a fairly simple Express.js app with a login component that I’d like to exit early if login fails. I’m seeing indications that the app isn’t doing that and I haven’t found a definitive answer that indicates whether calling res.send() halts any further processing. Here’s my code as it stands now: client.login( username, password, … Read more
This is a really basic question, but I’m trying to change the favicon of my node.js/Express app with app.use(express.favicon(__dirname + ‘/public/images/favicon.ico’)); and I’m still getting the default favicon. This is in my app.configure function, and yes, I’ve verified that there is a favicon.ico in the /public/images/favicon.ico.There’s nothing about a favicon.ico in the console, either, which … Read more
In many programming competitions I have seen people write this type of for-loop for(i = 0; i < (1 << 7); i++) Unless I am missing something, that’s the same as for(i = 0; i < 128; i++) Why use the (1 << 7) version? Isn’t calculating the condition every time an unnecessary overhead? Answer … Read more
So my web application requires authentication, and I have a signup page where if the person tries to sign up with an email that is already in the database, I want to show them an error message. I’m trying to do this using this code on the html side: <% if (message.length > 0) { … Read more
User requests some page and I want to know (on server side) what is the language in his/her browser. So I could render template with the right messages. On client side it’s easy: var language = window.navigator.userLanguage || window.navigator.language Answer You can use req.headers[“accept-language”] to get the language/locale the user has set in his browser. … Read more
I have recently have gotten into AngularJS and I love it. For an upcoming project I am looking to use the MEAN stack (MongoDB, Express, Angular, Node). I’m pretty familiar with Angular and I have a modest understanding of the purposes of MongoDB and Node in the stack. However, I don’t really understand what the … Read more
I’m using create-react-app with an express server. create-react-app has a pre-configured ServiceWorker that caches local assets (https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md#making-a-progressive-web-app). The problem I encountered when I tried to publish on my server is that the service-worker.js file was available, but I was getting errors in my browser console when it tried to register it. On Firefox, I got … Read more
How do you detect what environment an expressJS app is running in? (development, test, production?). There’s nothing in process.env indicating an environment… I’m aware that you can declare variables in your configuration file under each environment, but that doesn’t help if you are dynamically loading modules… Answer You can either check the environment by checking … Read more
I tried express-livereload, but it just reloaded view files. Should I use another tool, or this one can be configured to watch for my index.js file which runs the server? I read that options are the same as node-livereload, and default for watched files include .js files. Any URL you know with a simple configuration? … Read more
