feat: Add H2 support (nodejs#2061)

* feat: port H2 work with latest main

* fix: linting errors

* refactor: adjust support for headers and set testing

* test: add testing for h2

* refactor: make http2 session handle shorter

* feat: add support for sending body over http2

* feat: ensure support for streams over H2

* refactor: remove noisy logs

* feat: support 100 continue

* feat: support for iterators

* feat: add support for Blobs

* refactor: adapt contracts to h2 support

* refactor: cleanup

* feat: support for content-length

* refactor: body write

* test: refactor check continue test

* fix: bad check for headers

* fix: bad change

* chore: add http2 alpn test (nodejs#34)

* chore: add http2 alpn test using fastify

* chore: update to test https 1 with http2

* chore: update alpn test to return server request alpn protocol and http version

* chore: add alpn with body

* fix: remove fastify from package json

* refactor: remove leftover

* test: ensure dispatch feature

* feat(h2): support connect

* fix: pass signal down the road

* test: ensure stream works as expected

* test: ensure pipeline  works as expected

* test: ensure upgrade fails

* test: ensure destroy works as expected

* feat: allow to disable H2 calls upon request

* fix: linting

* feat: support GOAWAY frame (server-side)

* refactor; use h2 constants

* feat: initial shape of concurrent stream handling

* refactor: header processing

* chore: http/2 benchmark (nodejs#35)

Co-authored-by: Carlos Fuentes <me@metcoder.dev>

* refactor: adjust accordingly to review

* fix: add missing error handler for socket

* refactor: headers handling

* feat: initial concurrent stream support

* fix: lint

* refactor: adjust several pieces

* fix: support h2 headers for fetch

* feat: enhance h2 for fetch

* refactor: apply review suggestions

Co-authored-by: Robert Nagy <ronagy@icloud.com>

* refactor: set allowh2 to false

* fix: linting

* refactor: implement kHTTPConnVersion symbol

* test: adjust testing

* feat: buil factory

* fix: rebase

* feat: enhance TS types for maxConcurrent streams

* test: move fetch tests to fetch folder

* feat: add experimental warning

* test: refactor suite

* refactor: apply several changes

* test: split tests between v20 and lower

---------

Co-authored-by: Michael Kaufman <2073135+mkaufmaner@users.noreply.github.com>
Co-authored-by: Robert Nagy <ronagy@icloud.com>
Co-authored-by: Matteo Collina <hello@matteocollina.com>

benchmarks/benchmark-http2.js

@@ -0,0 +1,306 @@
+'use strict'
+
+const { connect } = require('http2')
+const { createSecureContext } = require('tls')
+const os = require('os')
+const path = require('path')
+const { readFileSync } = require('fs')
+const { table } = require('table')
+const { Writable } = require('stream')
+const { WritableStream } = require('stream/web')
+const { isMainThread } = require('worker_threads')
+
+const { Pool, Client, fetch, Agent, setGlobalDispatcher } = require('..')
+
+const ca = readFileSync(path.join(__dirname, '..', 'test', 'fixtures', 'ca.pem'), 'utf8')
+const servername = 'agent1'
+
+const iterations = (parseInt(process.env.SAMPLES, 10) || 10) + 1
+const errorThreshold = parseInt(process.env.ERROR_THRESHOLD, 10) || 3
+const connections = parseInt(process.env.CONNECTIONS, 10) || 50
+const pipelining = parseInt(process.env.PIPELINING, 10) || 10
+const parallelRequests = parseInt(process.env.PARALLEL, 10) || 100
+const headersTimeout = parseInt(process.env.HEADERS_TIMEOUT, 10) || 0
+const bodyTimeout = parseInt(process.env.BODY_TIMEOUT, 10) || 0
+const dest = {}
+
+if (process.env.PORT) {
+  dest.port = process.env.PORT
+  dest.url = `https://localhost:${process.env.PORT}`
+} else {
+  dest.url = 'https://localhost'
+  dest.socketPath = path.join(os.tmpdir(), 'undici.sock')
+}
+
+const httpsBaseOptions = {
+  ca,
+  servername,
+  protocol: 'https:',
+  hostname: 'localhost',
+  method: 'GET',
+  path: '/',
+  query: {
+    frappucino: 'muffin',
+    goat: 'scone',
+    pond: 'moose',
+    foo: ['bar', 'baz', 'bal'],
+    bool: true,
+    numberKey: 256
+  },
+  ...dest
+}
+
+const http2ClientOptions = {
+  secureContext: createSecureContext({ ca }),
+  servername
+}
+
+const undiciOptions = {
+  path: '/',
+  method: 'GET',
+  headersTimeout,
+  bodyTimeout
+}
+
+const Class = connections > 1 ? Pool : Client
+const dispatcher = new Class(httpsBaseOptions.url, {
+  allowH2: true,
+  pipelining,
+  connections,
+  connect: {
+    rejectUnauthorized: false,
+    ca,
+    servername
+  },
+  ...dest
+})
+
+setGlobalDispatcher(new Agent({
+  allowH2: true,
+  pipelining,
+  connections,
+  connect: {
+    rejectUnauthorized: false,
+    ca,
+    servername
+  }
+}))
+
+class SimpleRequest {
+  constructor (resolve) {
+    this.dst = new Writable({
+      write (chunk, encoding, callback) {
+        callback()
+      }
+    }).on('finish', resolve)
+  }
+
+  onConnect (abort) { }
+
+  onHeaders (statusCode, headers, resume) {
+    this.dst.on('drain', resume)
+  }
+
+  onData (chunk) {
+    return this.dst.write(chunk)
+  }
+
+  onComplete () {
+    this.dst.end()
+  }
+
+  onError (err) {
+    throw err
+  }
+}
+
+function makeParallelRequests (cb) {
+  return Promise.all(Array.from(Array(parallelRequests)).map(() => new Promise(cb)))
+}
+
+function printResults (results) {
+  // Sort results by least performant first, then compare relative performances and also printing padding
+  let last
+
+  const rows = Object.entries(results)
+    // If any failed, put on the top of the list, otherwise order by mean, ascending
+    .sort((a, b) => (!a[1].success ? -1 : b[1].mean - a[1].mean))
+    .map(([name, result]) => {
+      if (!result.success) {
+        return [name, result.size, 'Errored', 'N/A', 'N/A']
+      }
+
+      // Calculate throughput and relative performance
+      const { size, mean, standardError } = result
+      const relative = last !== 0 ? (last / mean - 1) * 100 : 0
+
+      // Save the slowest for relative comparison
+      if (typeof last === 'undefined') {
+        last = mean
+      }
+
+      return [
+        name,
+        size,
+        `${((connections * 1e9) / mean).toFixed(2)} req/sec`,
+        `± ${((standardError / mean) * 100).toFixed(2)} %`,
+        relative > 0 ? `+ ${relative.toFixed(2)} %` : '-'
+      ]
+    })
+
+  console.log(results)
+
+  // Add the header row
+  rows.unshift(['Tests', 'Samples', 'Result', 'Tolerance', 'Difference with slowest'])
+
+  return table(rows, {
+    columns: {
+      0: {
+        alignment: 'left'
+      },
+      1: {
+        alignment: 'right'
+      },
+      2: {
+        alignment: 'right'
+      },
+      3: {
+        alignment: 'right'
+      },
+      4: {
+        alignment: 'right'
+      }
+    },
+    drawHorizontalLine: (index, size) => index > 0 && index < size,
+    border: {
+      bodyLeft: '│',
+      bodyRight: '│',
+      bodyJoin: '│',
+      joinLeft: '|',
+      joinRight: '|',
+      joinJoin: '|'
+    }
+  })
+}
+
+const experiments = {
+  'http2 - request' () {
+    return makeParallelRequests(resolve => {
+      connect(dest.url, http2ClientOptions, (session) => {
+        const headers = {
+          ':path': '/',
+          ':method': 'GET',
+          ':scheme': 'https',
+          ':authority': `localhost:${dest.port}`
+        }
+
+        const request = session.request(headers)
+
+        request.pipe(
+          new Writable({
+            write (chunk, encoding, callback) {
+              callback()
+            }
+          })
+        ).on('finish', resolve)
+      })
+    })
+  },
+  'undici - pipeline' () {
+    return makeParallelRequests(resolve => {
+      dispatcher
+        .pipeline(undiciOptions, data => {
+          return data.body
+        })
+        .end()
+        .pipe(
+          new Writable({
+            write (chunk, encoding, callback) {
+              callback()
+            }
+          })
+        )
+        .on('finish', resolve)
+    })
+  },
+  'undici - request' () {
+    return makeParallelRequests(resolve => {
+      try {
+        dispatcher.request(undiciOptions).then(({ body }) => {
+          body
+            .pipe(
+              new Writable({
+                write (chunk, encoding, callback) {
+                  callback()
+                }
+              })
+            )
+            .on('error', (err) => {
+              console.log('undici - request - dispatcher.request - body - error', err)
+            })
+            .on('finish', () => {
+              resolve()
+            })
+        })
+      } catch (err) {
+        console.error('undici - request - dispatcher.request - requestCount', err)
+      }
+    })
+  },
+  'undici - stream' () {
+    return makeParallelRequests(resolve => {
+      return dispatcher
+        .stream(undiciOptions, () => {
+          return new Writable({
+            write (chunk, encoding, callback) {
+              callback()
+            }
+          })
+        })
+        .then(resolve)
+    })
+  },
+  'undici - dispatch' () {
+    return makeParallelRequests(resolve => {
+      dispatcher.dispatch(undiciOptions, new SimpleRequest(resolve))
+    })
+  }
+}
+
+if (process.env.PORT) {
+  // fetch does not support the socket
+  experiments['undici - fetch'] = () => {
+    return makeParallelRequests(resolve => {
+      fetch(dest.url, {}).then(res => {
+        res.body.pipeTo(new WritableStream({ write () { }, close () { resolve() } }))
+      }).catch(console.log)
+    })
+  }
+}
+
+async function main () {
+  const { cronometro } = await import('cronometro')
+
+  cronometro(
+    experiments,
+    {
+      iterations,
+      errorThreshold,
+      print: false
+    },
+    (err, results) => {
+      if (err) {
+        throw err
+      }
+
+      console.log(printResults(results))
+      dispatcher.destroy()
+    }
+  )
+}
+
+if (isMainThread) {
+  main()
+} else {
+  module.exports = main
+}