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@fastify/middie

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@fastify/middie

Middleware engine for Fastify

  • 9.0.2
  • latest
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
319K
decreased by-28.4%
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What is @fastify/middie?

@fastify/middie is a Fastify plugin that allows you to use Express-style middleware in your Fastify application. This can be particularly useful for developers who are transitioning from Express to Fastify or who want to leverage existing middleware designed for Express.

What are @fastify/middie's main functionalities?

Using Express Middleware

This feature allows you to use Express-style middleware in your Fastify application. The code sample demonstrates how to register the @fastify/middie plugin and use a simple middleware function that logs incoming requests.

const fastify = require('fastify')();
const middie = require('@fastify/middie');

fastify.register(middie).then(() => {
  fastify.use((req, res, next) => {
    console.log('Request received');
    next();
  });

  fastify.get('/', (req, reply) => {
    reply.send({ hello: 'world' });
  });

  fastify.listen(3000, err => {
    if (err) throw err;
    console.log('Server listening on http://localhost:3000');
  });
});

Using Third-Party Middleware

This feature allows you to use third-party middleware designed for Express. The code sample demonstrates how to use the `cors` middleware to enable Cross-Origin Resource Sharing in your Fastify application.

const fastify = require('fastify')();
const middie = require('@fastify/middie');
const cors = require('cors');

fastify.register(middie).then(() => {
  fastify.use(cors());

  fastify.get('/', (req, reply) => {
    reply.send({ hello: 'world' });
  });

  fastify.listen(3000, err => {
    if (err) throw err;
    console.log('Server listening on http://localhost:3000');
  });
});

Chaining Multiple Middleware

This feature allows you to chain multiple middleware functions. The code sample demonstrates how to register multiple middleware functions that log messages to the console before handling a request.

const fastify = require('fastify')();
const middie = require('@fastify/middie');

fastify.register(middie).then(() => {
  fastify.use((req, res, next) => {
    console.log('First middleware');
    next();
  });

  fastify.use((req, res, next) => {
    console.log('Second middleware');
    next();
  });

  fastify.get('/', (req, reply) => {
    reply.send({ hello: 'world' });
  });

  fastify.listen(3000, err => {
    if (err) throw err;
    console.log('Server listening on http://localhost:3000');
  });
});

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Package last updated on 21 Sep 2024

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