Server

Server middleware for Expresso

Summary

• Server
  • Summary
  • What is this
  • Basic usage
  • API
    • Options
    • Transformers
  • Envs

What is this

Expresso is opinionated, so this means we export our own server with our own configs, which are basically none. This package exposes a single simple Node HTTP Server in order to bind express to it.

Basic usage

Install it:

$ npm i @expresso/server

Import and use:

import { privKey } from './config'
import expresso from '@expresso/app'
import server from '@expresso/server'
import { IExpressoConfigOptions } from '@expresso/app'

interface IAppConfig extends IAuthConfig, IExpressoConfigOptions {}

const appFactory = expresso((app, config: IAppConfig, environment) => {
 // your expresso app
})

server.start(appFactory, { name: 'appname', jwt: { algorithms: ['HS256'], audience: 'audience', issuer: 'your-issuer', secret: privKey } })

API

The server exposes a single start method with the following signature:

async function start<TConfig extends IServerConfig> (appFactory: IExpressoAppFactory<TConfig>, options: TConfig, serverTransformer?: IServerTransformer)

The appFactory is your expresso app.

Options

The options object follows this signature:

export interface IServerConfig {
  name: string
  server?: {
    printOnListening?: boolean
    binding?: {
      ip: string
      port: number
    }
  }
}

• Name: Server or app name
• Server [optional]:
  • printOnListening (boolean): Enables or disables the informative text line Expresso server listening on...
  • binding:
    • ip (string): The IP on which the server will bind to
    • port (number): The port the server will listen to

Transformers

The server exposes a serverTransformer parameter, this is made in order to allow you to change and customize your server on on the fly. It is a function with the following signature:

(server: http.Server, config: Required<IServerConfig>): Promise<void>

In this function you can modify the server object to bind, include or change whatever configuration you need. Since objects are passed as references to functions in JS, there's no need to return it

Envs

You can also set envs to change the default PORT and HOST of the server.

• SERVER_BINDING_PORT or PORT: Will have the same effect as adding { server: { binding: { port: xxxx } } } to your config file
• SERVER_BINDING_IP or HOST: Will have the same effect as adding { server: { binding: { ip: 'xxx.xxx.xxx.xxx' } } } to your config file