Automatically generate HTTP etags and return 304 when needed, according to RFC2616-sec13. A plugin for Fastify.

npm i fastify-etag

'use strict'

const Fastify = require('fastify')
const Etag = require('fastify-etag')

const app = Fastify()
app.register(Etag)

app.get('/', async (req, reply) => {
  return { hello: 'world' }
})

app.listen(3000)

• algorithm: all hashing algorithm that Node.js support, and 'fnv1a'. Default: 'fnv1a'.

The fnv1a logic was forked from https://github.com/sindresorhus/fnv1a and adapted to support buffers.

• md5 algorithm: 29679 req/s (median)
• sha1 algorithm: 25935 req/s (median)
• fnv1a algorithm: 42943 req/s (median)

No etag generation: 45471 req/s (median)

MIT