Using got with alpn-agent

index.js

const ALPNAgent = require('@zentrick/alpn-agent')
const { Agent: HttpAgent } = require('http')
const http2 = require('http2-wrapper')
const { extend: gotExtend } = require('got')

const got = gotExtend({
  hooks: {
    beforeRequest: [
      async options => {
        if (options.request != null) {
          // Use request function provided by options
          return
        }

        if (!(options.agent instanceof ALPNAgent)) {
          // Don't use ALPN negotiation
          return
        }

        if (options.protocol !== 'https:') {
          // Not using HTTPS
          return
        }

        const alpnProto = await options.agent.negotiateALPN(options)
        if (alpnProto === 'h2') {
          options.socketSession = options.session
          options.session = await options.agent.createH2Session(options)
          options.request = http2.request
        }
      }
    ]
  }
})

const alpnAgent = new ALPNAgent()
const httpAgent = new HttpAgent()

const runTest = async (name, url, options = null) => {
  const { body } = await got(
    url,
    Object.assign({}, options, {
      json: true,
      agent: url.startsWith('https://') ? alpnAgent : httpAgent
    })
  )
  console.log(name, body)
}

const runTests = async () => {
  await runTest('http2-alpn', 'https://nghttp2.org/httpbin/headers')
  await runTest('http2-h1', 'https://nghttp2.org/httpbin/headers', {
    ALPNProtocols: ['http/1.1']
  })
  await runTest('https-alpn', 'https://httpbin.org/headers')
  await runTest('http', 'http://httpbin.org/headers')
  await alpnAgent.destroy()
}
runTests()