H3-compression

Handles compression for H3

Features

✔️ Zlib Compression: You can use zlib compression (brotli, gzip and deflate)

✔️ Stream Compression: You can use native stream compressions (gzip, deflate)

✔️ Compression Detection: It uses the best compression which is accepted

Install

# Using npm
npm install h3-compression

# Using yarn
yarn add h3-compression

# Using pnpm
pnpm add h3-compression

Usage

import { createServer } from 'node:http'
import { createApp, eventHandler, toNodeListener } from 'h3'
import { useCompressionStream } from 'h3-compression'

const app = createApp({ onBeforeResponse: useCompressionStream }) // or { onBeforeResponse: useCompression }
app.use(
  '/',
  eventHandler(() => 'Hello world!'),
)

createServer(toNodeListener(app)).listen(process.env.PORT || 3000)

Example using listhen for an elegant listener:

import { createApp, eventHandler, toNodeListener } from 'h3'
import { listen } from 'listhen'
import { useCompressionStream } from 'h3-compression'

const app = createApp({ onBeforeResponse: useCompressionStream }) // or { onBeforeResponse: useCompression }
app.use(
  '/',
  eventHandler(() => 'Hello world!'),
)

listen(toNodeListener(app))

Nuxt 3

If you want to use it in nuxt 3 you can define a nitro plugin.

server/plugins/compression.ts

import { useCompression } from 'h3-compression'

export default defineNitroPlugin((nitro) => {
  nitro.hooks.hook('render:response', async (response, { event }) => {
    if (!response.headers?.['content-type']?.startsWith('text/html'))
      return

    await useCompression(event, response)
  })
})

Note

useCompressionStream doesn't work right now in nitro. So you just can use useCompression

Utilities

H3-compression has a concept of composable utilities that accept event (from eventHandler((event) => {})) as their first argument and response as their second.

Zlib Compression

useGZipCompression(event, response)
useDeflateCompression(event, response)
useBrotliCompression(event, response)
useCompression(event, response)

Stream Compression

useGZipCompressionStream(event, response)
useDeflateCompressionStream(event, response)
useCompressionStream(event, response)

CodeDredd/h3-compression