Pharrell

Because it's API'y

Opinionated HTTP framework for Node.js to make the creation of CRUDL APIs as simple as possible. Built on the Koa framework, it offers support for both standard server operation as well as bundling for serverless operation via an AWS Lambda function.

The framework facilitates easy implementation of APIs based on the API design from Deliveroo Engineering.

An intentionally simplistic internal router provides fast routing for relatively fixed path patterns, even with a large number of registered endpoints.

Installation

Pharrell is written in ES6 and uses Babel to transpile to support Node v8.10 or higher (the current highest supported version of Node for AWS Lambda functions).

$ npm install pharrell

Hello Pharrell

import { Endpoint, ListResult, Pharrell } from '..';

class ExampleEndpoint extends Endpoint {
  constructor() {
    super('minion');
    this.use((context, next) => {
      context.set('X-Endpoint', 'Minion');
      await next();
    });
  }

  async lookup(id) {
    return db.find(id);
  }

  async list(page) {
    const limit = 100;
    const offset = page * limit;
    const results = db.findAll({ offset, limit });
    const ids = results.map(item => item.id);
    const total = db.count();
    return new ListResult(ids, total, limit);
  }
}

const app = new Pharrell();
const endpoint = new ExampleEndpoint();
app
  .mount(endpoint)
  .use((context, next) => {
    context.set('X-App', 'My App');
    await next();
  })
  .listen(3000);

Endpoints

Because of the simplicity of the framework, most implementations should need only to create one or more subclasses of Endpoint to provide functionality. Check the full example to see how a fully featured API could be structured.

You should also read the API design Pharrell is based on to get a better understanding of why things are implemented the way they are.

Using with Lambda

Thanks to AWS Serverless Express it's easy to also run Pharrell as a serverless Lambda function:

const app = new Pharrell();
const endpoint = new ExampleEndpoint();
app.mount(endpoint);

exports.handler = app.handler();

Authors

• Created by @andybee
• Logo by @JonathanEx

License

MIT