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Javascript

CLI Flags in Practice + How to Make Your Own CLI Command with oclif

Editor’s note: If you like CLIs, you should check out oclifconf taking place on Friday, May 31st in San Francisco. It’s the first community get-together for oclif! Space is limited so let us know soon if you are interested in joining. What is it that makes working from the command line so empowering? It can feel archaic at times, sure, but when you remember the right sequence of words, characters, and symbols for what you’re trying to do, it hits you with a sense of accomplishment and mastery over your tools that no graphical interface can compete with.

So what…

Saved by the Schema: Using JSON Schema to Document, Test, and Debug APIs

Heroku has many public API endpoints. Each of these endpoints needs to be tested so that we know how they work, and documented so that our customers (and other API consumers) know how they work. Follow along, and we’ll learn how Heroku uses JSON Schema to test and document our Platform API – and how it helped us uncover an unexpected bug, rooted in the way the Oj gem parses Big Decimals.

JSON Schema files are like blueprints that define the structure and semantics of other JSON documents. When a JSON Schema file is applied to a JSON document, you can…

PWA Tutorial: Turn Your Website Into a Progressive Web App

Progressive web apps (or PWAs) enable websites to function more like native mobile apps in exchange for some flexibility. You get cross-platform native mobile app functionality (or close to it) without all the overhead of app store approvals and tons of platform-specific native code.

Users can install a progressive web app to their home screen and launch it just like a native app. However, the app is launched into a pseudo-app frame that has some restrictions and only allows access to pages that are sub-paths of the initial path of the progressive web app. They also must be served over…

Modern Web Stack: Rails 5 API, ActiveAdmin, and Create React App on Heroku

How to blend a rock-solid CMS and API with the absolute best in front-end tooling, built as a single project and hosted seamlessly on Heroku.

Rails is an incredible framework, but modern web development has moved to the front-end, meaning sometimes you don’t need all the bulk of the asset pipeline and the templating system. In Rails 5 you can now create an API-only Rails app, meaning you can build your front-end however you like—using Create React App, for example. It’s no longer 100% omakase .

And for projects that don’t need CMS-like capabilities,…

Using HTTP Headers to Secure Your Site

Observatory by Mozilla helps websites by teaching developers, system administrators, and security professionals how to configure their sites safely and securely.

Let's take a look at the scores Observatory gives for a fairly straightforward Static Buildpack app, https://2017.keeprubyweird.com .

Test Scores

Test
Pass
Score
Explanation Content Security Policy ✗
-25
Content Security Policy (CSP) header not implemented Cookies ―
0
No cookies detected Cross-origin Resource Sharing ✔
0
Content is not visible via cross-origin resource sharing (CORS) files or headers

HTTP Public Key Pinning
―
0
HTTP Public Key Pinning (HPKP) header not implemented (optional) HTTP Strict Transport Security ✗
-20
HTTP Strict Transport Security (HSTS) header not implemented…

Habits of a Happy Node Hacker 2017

It’s been a little over a year since our last Happy Node Hackers post , and even in such a short time much has changed and some powerful new tools have been released. The Node.js ecosystem continues to mature and new best practices have emerged.

Here are 8 habits for happy Node hackers updated for 2017. They're specifically for app developers , rather than module authors, since those groups have different goals and constraints:

1. Lock Down Your Dependency Tree

In modern Node applications, your code is often only the tip of an iceberg.…

The Future of Ember.js: An Interview With Tom Dale at EmberConf – Part Two

This is the second of a two-part transcript from a recent interview with Tom Dale of Ember.js. In part one we discussed the history and direction of the Ember.js project . Continuing the discussion of the future for Ember.js, this post includes the rest of the interview, primarily focused on the Glimmer.js project. Some of the questions were omitted from these transcriptions for brevity, so we’re also releasing the nearly hour long audio file of the entire interview . Enjoy!

Jonan: Let’s talk about Glimmer 2. If I understand correctly it's released now and it…

The History of Ember.js: An Interview With Tom Dale at EmberConf – Part One

At EmberConf Terence Lee and I had a chance to sit down with Tom Dale and chat about the history of Ember.js and where it’s headed now, including some details on the newly extracted Glimmer.js rendering engine. This post details a lot of the history of Ember, including some of the motivation that led the framework to what it is today. Watch the blog for the second portion of this interview with all of the details on Glimmer.js. The next post will also include the full audio of the interview, with many questions we opted to omit from…

Data Pipelines with Kafka and Functional Reactive Programming with Node.js

Heroku recently released [a managed Apache Kafka][1] offering. As a Node.js developer, I wanted to demystify Kafka by sharing a simple yet practical use case with the many Node.js developers who are curious how this technology might be useful. At Heroku we use Kafka internally for a number of uses including data pipelines . I thought that would be a good place to start.

When it comes to actual examples, Java and Scala get all the love in the Kafka world. Of course, these are powerful languages, but I wanted to explore Kafka from the perspective of Node.js. While there are…

Running the Bonobos Stack on Heroku: Interview with Austen Ito

Austen Ito is a software engineer at leading online fashion brand Bonobos, based in New York. Read our Bonobos customer story for more information about how Heroku has helped their business.

What do you have running on Heroku?

We’re running just about everything on Heroku, including our Bonobos.com website, cross-app messaging services, an API for our ERP, as well as some internal tools. The only pieces that are not on Heroku are the Data Science and ERP components. We’re also using Desk.com for customer service queuing.

Walk us through your…

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