Express

Pikku can be added to an express server via middleware, or you can just use the PikkuExpressServer if everything is using pikku.

Using Express Middleware

Pikku can be / is best used within express as a middleware function.

Express middleware

import { pikkuMiddleware } from '@pikku/express-middleware'

import { createSingletonServices, createSessionServices } from 'path/to/pikku-bootstrap.ts'

// The express server setup goes here...

const singletonServices = await createSingletonServices()
app.use(pikkuMiddleware(
   singletonServices, 
   createSessionServices, 
   {
      respondWith404: false,
      logRoutes: true,
      loadSchemas: true
   }
))

Using PikkuExpressServer

note

The setup process for Express, uWS, and Fastify servers are identical, except for using different constructors.

PikkuExpressServer is a quick way to get an express server started with pikku if you don't need to put in any custom configuration.

Express start

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See full example on GitHub

This script does the following:

1. Imports necessary modules from @pikku/express and your project's configuration and services.
2. Defines an async function runServer that:
   • Loads the Pikku configuration
   • Creates singleton services
   • Initializes a new PikkuExpressServer instance
   • Enables graceful shutdown on SIGINT
   • Initializes and starts the server
3. Handles any errors by logging them and exiting the process
4. Calls the runServer function to start the server

By following this setup, you can easily integrate Pikku with a Express server, benefiting from both Pikku's features and Express's ecosystem.