feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

1 files changed, 1606 insertions, 0 deletions

diff --git a/vanilla/node_modules/undici/lib/dispatcher/client-h1.js b/vanilla/node_modules/undici/lib/dispatcher/client-h1.js
new file mode 100644
index 0000000..ce6b4ee
--- /dev/null
+++ b/vanilla/node_modules/undici/lib/dispatcher/client-h1.js
@@ -0,0 +1,1606 @@
+'use strict'
+
+/* global WebAssembly */
+
+const assert = require('node:assert')
+const util = require('../core/util.js')
+const { channels } = require('../core/diagnostics.js')
+const timers = require('../util/timers.js')
+const {
+  RequestContentLengthMismatchError,
+  ResponseContentLengthMismatchError,
+  RequestAbortedError,
+  HeadersTimeoutError,
+  HeadersOverflowError,
+  SocketError,
+  InformationalError,
+  BodyTimeoutError,
+  HTTPParserError,
+  ResponseExceededMaxSizeError
+} = require('../core/errors.js')
+const {
+  kUrl,
+  kReset,
+  kClient,
+  kParser,
+  kBlocking,
+  kRunning,
+  kPending,
+  kSize,
+  kWriting,
+  kQueue,
+  kNoRef,
+  kKeepAliveDefaultTimeout,
+  kHostHeader,
+  kPendingIdx,
+  kRunningIdx,
+  kError,
+  kPipelining,
+  kSocket,
+  kKeepAliveTimeoutValue,
+  kMaxHeadersSize,
+  kKeepAliveMaxTimeout,
+  kKeepAliveTimeoutThreshold,
+  kHeadersTimeout,
+  kBodyTimeout,
+  kStrictContentLength,
+  kMaxRequests,
+  kCounter,
+  kMaxResponseSize,
+  kOnError,
+  kResume,
+  kHTTPContext,
+  kClosed
+} = require('../core/symbols.js')
+
+const constants = require('../llhttp/constants.js')
+const EMPTY_BUF = Buffer.alloc(0)
+const FastBuffer = Buffer[Symbol.species]
+const removeAllListeners = util.removeAllListeners
+
+let extractBody
+
+function lazyllhttp () {
+  const llhttpWasmData = process.env.JEST_WORKER_ID ? require('../llhttp/llhttp-wasm.js') : undefined
+
+  let mod
+
+  // We disable wasm SIMD on ppc64 as it seems to be broken on Power 9 architectures.
+  let useWasmSIMD = process.arch !== 'ppc64'
+  // The Env Variable UNDICI_NO_WASM_SIMD allows explicitly overriding the default behavior
+  if (process.env.UNDICI_NO_WASM_SIMD === '1') {
+    useWasmSIMD = true
+  } else if (process.env.UNDICI_NO_WASM_SIMD === '0') {
+    useWasmSIMD = false
+  }
+
+  if (useWasmSIMD) {
+    try {
+      mod = new WebAssembly.Module(require('../llhttp/llhttp_simd-wasm.js'))
+    } catch {
+    }
+  }
+
+  if (!mod) {
+    // We could check if the error was caused by the simd option not
+    // being enabled, but the occurring of this other error
+    // * https://github.com/emscripten-core/emscripten/issues/11495
+    // got me to remove that check to avoid breaking Node 12.
+    mod = new WebAssembly.Module(llhttpWasmData || require('../llhttp/llhttp-wasm.js'))
+  }
+
+  return new WebAssembly.Instance(mod, {
+    env: {
+      /**
+       * @param {number} p
+       * @param {number} at
+       * @param {number} len
+       * @returns {number}
+       */
+      wasm_on_url: (p, at, len) => {
+        return 0
+      },
+      /**
+       * @param {number} p
+       * @param {number} at
+       * @param {number} len
+       * @returns {number}
+       */
+      wasm_on_status: (p, at, len) => {
+        assert(currentParser.ptr === p)
+        const start = at - currentBufferPtr + currentBufferRef.byteOffset
+        return currentParser.onStatus(new FastBuffer(currentBufferRef.buffer, start, len))
+      },
+      /**
+       * @param {number} p
+       * @returns {number}
+       */
+      wasm_on_message_begin: (p) => {
+        assert(currentParser.ptr === p)
+        return currentParser.onMessageBegin()
+      },
+      /**
+       * @param {number} p
+       * @param {number} at
+       * @param {number} len
+       * @returns {number}
+       */
+      wasm_on_header_field: (p, at, len) => {
+        assert(currentParser.ptr === p)
+        const start = at - currentBufferPtr + currentBufferRef.byteOffset
+        return currentParser.onHeaderField(new FastBuffer(currentBufferRef.buffer, start, len))
+      },
+      /**
+       * @param {number} p
+       * @param {number} at
+       * @param {number} len
+       * @returns {number}
+       */
+      wasm_on_header_value: (p, at, len) => {
+        assert(currentParser.ptr === p)
+        const start = at - currentBufferPtr + currentBufferRef.byteOffset
+        return currentParser.onHeaderValue(new FastBuffer(currentBufferRef.buffer, start, len))
+      },
+      /**
+       * @param {number} p
+       * @param {number} statusCode
+       * @param {0|1} upgrade
+       * @param {0|1} shouldKeepAlive
+       * @returns {number}
+       */
+      wasm_on_headers_complete: (p, statusCode, upgrade, shouldKeepAlive) => {
+        assert(currentParser.ptr === p)
+        return currentParser.onHeadersComplete(statusCode, upgrade === 1, shouldKeepAlive === 1)
+      },
+      /**
+       * @param {number} p
+       * @param {number} at
+       * @param {number} len
+       * @returns {number}
+       */
+      wasm_on_body: (p, at, len) => {
+        assert(currentParser.ptr === p)
+        const start = at - currentBufferPtr + currentBufferRef.byteOffset
+        return currentParser.onBody(new FastBuffer(currentBufferRef.buffer, start, len))
+      },
+      /**
+       * @param {number} p
+       * @returns {number}
+       */
+      wasm_on_message_complete: (p) => {
+        assert(currentParser.ptr === p)
+        return currentParser.onMessageComplete()
+      }
+
+    }
+  })
+}
+
+let llhttpInstance = null
+
+/**
+ * @type {Parser|null}
+ */
+let currentParser = null
+let currentBufferRef = null
+/**
+ * @type {number}
+ */
+let currentBufferSize = 0
+let currentBufferPtr = null
+
+const USE_NATIVE_TIMER = 0
+const USE_FAST_TIMER = 1
+
+// Use fast timers for headers and body to take eventual event loop
+// latency into account.
+const TIMEOUT_HEADERS = 2 | USE_FAST_TIMER
+const TIMEOUT_BODY = 4 | USE_FAST_TIMER
+
+// Use native timers to ignore event loop latency for keep-alive
+// handling.
+const TIMEOUT_KEEP_ALIVE = 8 | USE_NATIVE_TIMER
+
+class Parser {
+  /**
+     * @param {import('./client.js')} client
+     * @param {import('net').Socket} socket
+     * @param {*} llhttp
+     */
+  constructor (client, socket, { exports }) {
+    this.llhttp = exports
+    this.ptr = this.llhttp.llhttp_alloc(constants.TYPE.RESPONSE)
+    this.client = client
+    /**
+     * @type {import('net').Socket}
+     */
+    this.socket = socket
+    this.timeout = null
+    this.timeoutValue = null
+    this.timeoutType = null
+    this.statusCode = 0
+    this.statusText = ''
+    this.upgrade = false
+    this.headers = []
+    this.headersSize = 0
+    this.headersMaxSize = client[kMaxHeadersSize]
+    this.shouldKeepAlive = false
+    this.paused = false
+    this.resume = this.resume.bind(this)
+
+    this.bytesRead = 0
+
+    this.keepAlive = ''
+    this.contentLength = ''
+    this.connection = ''
+    this.maxResponseSize = client[kMaxResponseSize]
+  }
+
+  setTimeout (delay, type) {
+    // If the existing timer and the new timer are of different timer type
+    // (fast or native) or have different delay, we need to clear the existing
+    // timer and set a new one.
+    if (
+      delay !== this.timeoutValue ||
+      (type & USE_FAST_TIMER) ^ (this.timeoutType & USE_FAST_TIMER)
+    ) {
+      // If a timeout is already set, clear it with clearTimeout of the fast
+      // timer implementation, as it can clear fast and native timers.
+      if (this.timeout) {
+        timers.clearTimeout(this.timeout)
+        this.timeout = null
+      }
+
+      if (delay) {
+        if (type & USE_FAST_TIMER) {
+          this.timeout = timers.setFastTimeout(onParserTimeout, delay, new WeakRef(this))
+        } else {
+          this.timeout = setTimeout(onParserTimeout, delay, new WeakRef(this))
+          this.timeout?.unref()
+        }
+      }
+
+      this.timeoutValue = delay
+    } else if (this.timeout) {
+      if (this.timeout.refresh) {
+        this.timeout.refresh()
+      }
+    }
+
+    this.timeoutType = type
+  }
+
+  resume () {
+    if (this.socket.destroyed || !this.paused) {
+      return
+    }
+
+    assert(this.ptr != null)
+    assert(currentParser === null)
+
+    this.llhttp.llhttp_resume(this.ptr)
+
+    assert(this.timeoutType === TIMEOUT_BODY)
+    if (this.timeout) {
+      if (this.timeout.refresh) {
+        this.timeout.refresh()
+      }
+    }
+
+    this.paused = false
+    this.execute(this.socket.read() || EMPTY_BUF) // Flush parser.
+    this.readMore()
+  }
+
+  readMore () {
+    while (!this.paused && this.ptr) {
+      const chunk = this.socket.read()
+      if (chunk === null) {
+        break
+      }
+      this.execute(chunk)
+    }
+  }
+
+  /**
+   * @param {Buffer} chunk
+   */
+  execute (chunk) {
+    assert(currentParser === null)
+    assert(this.ptr != null)
+    assert(!this.paused)
+
+    const { socket, llhttp } = this
+
+    // Allocate a new buffer if the current buffer is too small.
+    if (chunk.length > currentBufferSize) {
+      if (currentBufferPtr) {
+        llhttp.free(currentBufferPtr)
+      }
+      // Allocate a buffer that is a multiple of 4096 bytes.
+      currentBufferSize = Math.ceil(chunk.length / 4096) * 4096
+      currentBufferPtr = llhttp.malloc(currentBufferSize)
+    }
+
+    new Uint8Array(llhttp.memory.buffer, currentBufferPtr, currentBufferSize).set(chunk)
+
+    // Call `execute` on the wasm parser.
+    // We pass the `llhttp_parser` pointer address, the pointer address of buffer view data,
+    // and finally the length of bytes to parse.
+    // The return value is an error code or `constants.ERROR.OK`.
+    try {
+      let ret
+
+      try {
+        currentBufferRef = chunk
+        currentParser = this
+        ret = llhttp.llhttp_execute(this.ptr, currentBufferPtr, chunk.length)
+      } finally {
+        currentParser = null
+        currentBufferRef = null
+      }
+
+      if (ret !== constants.ERROR.OK) {
+        const data = chunk.subarray(llhttp.llhttp_get_error_pos(this.ptr) - currentBufferPtr)
+
+        if (ret === constants.ERROR.PAUSED_UPGRADE) {
+          this.onUpgrade(data)
+        } else if (ret === constants.ERROR.PAUSED) {
+          this.paused = true
+          socket.unshift(data)
+        } else {
+          const ptr = llhttp.llhttp_get_error_reason(this.ptr)
+          let message = ''
+          if (ptr) {
+            const len = new Uint8Array(llhttp.memory.buffer, ptr).indexOf(0)
+            message =
+              'Response does not match the HTTP/1.1 protocol (' +
+              Buffer.from(llhttp.memory.buffer, ptr, len).toString() +
+              ')'
+          }
+          throw new HTTPParserError(message, constants.ERROR[ret], data)
+        }
+      }
+    } catch (err) {
+      util.destroy(socket, err)
+    }
+  }
+
+  destroy () {
+    assert(currentParser === null)
+    assert(this.ptr != null)
+
+    this.llhttp.llhttp_free(this.ptr)
+    this.ptr = null
+
+    this.timeout && timers.clearTimeout(this.timeout)
+    this.timeout = null
+    this.timeoutValue = null
+    this.timeoutType = null
+
+    this.paused = false
+  }
+
+  /**
+   * @param {Buffer} buf
+   * @returns {0}
+   */
+  onStatus (buf) {
+    this.statusText = buf.toString()
+    return 0
+  }
+
+  /**
+   * @returns {0|-1}
+   */
+  onMessageBegin () {
+    const { socket, client } = this
+
+    if (socket.destroyed) {
+      return -1
+    }
+
+    const request = client[kQueue][client[kRunningIdx]]
+    if (!request) {
+      return -1
+    }
+    request.onResponseStarted()
+
+    return 0
+  }
+
+  /**
+   * @param {Buffer} buf
+   * @returns {number}
+   */
+  onHeaderField (buf) {
+    const len = this.headers.length
+
+    if ((len & 1) === 0) {
+      this.headers.push(buf)
+    } else {
+      this.headers[len - 1] = Buffer.concat([this.headers[len - 1], buf])
+    }
+
+    this.trackHeader(buf.length)
+
+    return 0
+  }
+
+  /**
+   * @param {Buffer} buf
+   * @returns {number}
+   */
+  onHeaderValue (buf) {
+    let len = this.headers.length
+
+    if ((len & 1) === 1) {
+      this.headers.push(buf)
+      len += 1
+    } else {
+      this.headers[len - 1] = Buffer.concat([this.headers[len - 1], buf])
+    }
+
+    const key = this.headers[len - 2]
+    if (key.length === 10) {
+      const headerName = util.bufferToLowerCasedHeaderName(key)
+      if (headerName === 'keep-alive') {
+        this.keepAlive += buf.toString()
+      } else if (headerName === 'connection') {
+        this.connection += buf.toString()
+      }
+    } else if (key.length === 14 && util.bufferToLowerCasedHeaderName(key) === 'content-length') {
+      this.contentLength += buf.toString()
+    }
+
+    this.trackHeader(buf.length)
+
+    return 0
+  }
+
+  /**
+   * @param {number} len
+   */
+  trackHeader (len) {
+    this.headersSize += len
+    if (this.headersSize >= this.headersMaxSize) {
+      util.destroy(this.socket, new HeadersOverflowError())
+    }
+  }
+
+  /**
+   * @param {Buffer} head
+   */
+  onUpgrade (head) {
+    const { upgrade, client, socket, headers, statusCode } = this
+
+    assert(upgrade)
+    assert(client[kSocket] === socket)
+    assert(!socket.destroyed)
+    assert(!this.paused)
+    assert((headers.length & 1) === 0)
+
+    const request = client[kQueue][client[kRunningIdx]]
+    assert(request)
+    assert(request.upgrade || request.method === 'CONNECT')
+
+    this.statusCode = 0
+    this.statusText = ''
+    this.shouldKeepAlive = false
+
+    this.headers = []
+    this.headersSize = 0
+
+    socket.unshift(head)
+
+    socket[kParser].destroy()
+    socket[kParser] = null
+
+    socket[kClient] = null
+    socket[kError] = null
+
+    removeAllListeners(socket)
+
+    client[kSocket] = null
+    client[kHTTPContext] = null // TODO (fix): This is hacky...
+    client[kQueue][client[kRunningIdx]++] = null
+    client.emit('disconnect', client[kUrl], [client], new InformationalError('upgrade'))
+
+    try {
+      request.onUpgrade(statusCode, headers, socket)
+    } catch (err) {
+      util.destroy(socket, err)
+    }
+
+    client[kResume]()
+  }
+
+  /**
+   * @param {number} statusCode
+   * @param {boolean} upgrade
+   * @param {boolean} shouldKeepAlive
+   * @returns {number}
+   */
+  onHeadersComplete (statusCode, upgrade, shouldKeepAlive) {
+    const { client, socket, headers, statusText } = this
+
+    if (socket.destroyed) {
+      return -1
+    }
+
+    const request = client[kQueue][client[kRunningIdx]]
+
+    if (!request) {
+      return -1
+    }
+
+    assert(!this.upgrade)
+    assert(this.statusCode < 200)
+
+    if (statusCode === 100) {
+      util.destroy(socket, new SocketError('bad response', util.getSocketInfo(socket)))
+      return -1
+    }
+
+    /* this can only happen if server is misbehaving */
+    if (upgrade && !request.upgrade) {
+      util.destroy(socket, new SocketError('bad upgrade', util.getSocketInfo(socket)))
+      return -1
+    }
+
+    assert(this.timeoutType === TIMEOUT_HEADERS)
+
+    this.statusCode = statusCode
+    this.shouldKeepAlive = (
+      shouldKeepAlive ||
+      // Override llhttp value which does not allow keepAlive for HEAD.
+      (request.method === 'HEAD' && !socket[kReset] && this.connection.toLowerCase() === 'keep-alive')
+    )
+
+    if (this.statusCode >= 200) {
+      const bodyTimeout = request.bodyTimeout != null
+        ? request.bodyTimeout
+        : client[kBodyTimeout]
+      this.setTimeout(bodyTimeout, TIMEOUT_BODY)
+    } else if (this.timeout) {
+      if (this.timeout.refresh) {
+        this.timeout.refresh()
+      }
+    }
+
+    if (request.method === 'CONNECT') {
+      assert(client[kRunning] === 1)
+      this.upgrade = true
+      return 2
+    }
+
+    if (upgrade) {
+      assert(client[kRunning] === 1)
+      this.upgrade = true
+      return 2
+    }
+
+    assert((this.headers.length & 1) === 0)
+    this.headers = []
+    this.headersSize = 0
+
+    if (this.shouldKeepAlive && client[kPipelining]) {
+      const keepAliveTimeout = this.keepAlive ? util.parseKeepAliveTimeout(this.keepAlive) : null
+
+      if (keepAliveTimeout != null) {
+        const timeout = Math.min(
+          keepAliveTimeout - client[kKeepAliveTimeoutThreshold],
+          client[kKeepAliveMaxTimeout]
+        )
+        if (timeout <= 0) {
+          socket[kReset] = true
+        } else {
+          client[kKeepAliveTimeoutValue] = timeout
+        }
+      } else {
+        client[kKeepAliveTimeoutValue] = client[kKeepAliveDefaultTimeout]
+      }
+    } else {
+      // Stop more requests from being dispatched.
+      socket[kReset] = true
+    }
+
+    const pause = request.onHeaders(statusCode, headers, this.resume, statusText) === false
+
+    if (request.aborted) {
+      return -1
+    }
+
+    if (request.method === 'HEAD') {
+      return 1
+    }
+
+    if (statusCode < 200) {
+      return 1
+    }
+
+    if (socket[kBlocking]) {
+      socket[kBlocking] = false
+      client[kResume]()
+    }
+
+    return pause ? constants.ERROR.PAUSED : 0
+  }
+
+  /**
+   * @param {Buffer} buf
+   * @returns {number}
+   */
+  onBody (buf) {
+    const { client, socket, statusCode, maxResponseSize } = this
+
+    if (socket.destroyed) {
+      return -1
+    }
+
+    const request = client[kQueue][client[kRunningIdx]]
+    assert(request)
+
+    assert(this.timeoutType === TIMEOUT_BODY)
+    if (this.timeout) {
+      if (this.timeout.refresh) {
+        this.timeout.refresh()
+      }
+    }
+
+    assert(statusCode >= 200)
+
+    if (maxResponseSize > -1 && this.bytesRead + buf.length > maxResponseSize) {
+      util.destroy(socket, new ResponseExceededMaxSizeError())
+      return -1
+    }
+
+    this.bytesRead += buf.length
+
+    if (request.onData(buf) === false) {
+      return constants.ERROR.PAUSED
+    }
+
+    return 0
+  }
+
+  /**
+   * @returns {number}
+   */
+  onMessageComplete () {
+    const { client, socket, statusCode, upgrade, headers, contentLength, bytesRead, shouldKeepAlive } = this
+
+    if (socket.destroyed && (!statusCode || shouldKeepAlive)) {
+      return -1
+    }
+
+    if (upgrade) {
+      return 0
+    }
+
+    assert(statusCode >= 100)
+    assert((this.headers.length & 1) === 0)
+
+    const request = client[kQueue][client[kRunningIdx]]
+    assert(request)
+
+    this.statusCode = 0
+    this.statusText = ''
+    this.bytesRead = 0
+    this.contentLength = ''
+    this.keepAlive = ''
+    this.connection = ''
+
+    this.headers = []
+    this.headersSize = 0
+
+    if (statusCode < 200) {
+      return 0
+    }
+
+    if (request.method !== 'HEAD' && contentLength && bytesRead !== parseInt(contentLength, 10)) {
+      util.destroy(socket, new ResponseContentLengthMismatchError())
+      return -1
+    }
+
+    request.onComplete(headers)
+
+    client[kQueue][client[kRunningIdx]++] = null
+
+    if (socket[kWriting]) {
+      assert(client[kRunning] === 0)
+      // Response completed before request.
+      util.destroy(socket, new InformationalError('reset'))
+      return constants.ERROR.PAUSED
+    } else if (!shouldKeepAlive) {
+      util.destroy(socket, new InformationalError('reset'))
+      return constants.ERROR.PAUSED
+    } else if (socket[kReset] && client[kRunning] === 0) {
+      // Destroy socket once all requests have completed.
+      // The request at the tail of the pipeline is the one
+      // that requested reset and no further requests should
+      // have been queued since then.
+      util.destroy(socket, new InformationalError('reset'))
+      return constants.ERROR.PAUSED
+    } else if (client[kPipelining] == null || client[kPipelining] === 1) {
+      // We must wait a full event loop cycle to reuse this socket to make sure
+      // that non-spec compliant servers are not closing the connection even if they
+      // said they won't.
+      setImmediate(client[kResume])
+    } else {
+      client[kResume]()
+    }
+
+    return 0
+  }
+}
+
+function onParserTimeout (parserWeakRef) {
+  const parser = parserWeakRef.deref()
+  if (!parser) {
+    return
+  }
+
+  const { socket, timeoutType, client, paused } = parser
+
+  if (timeoutType === TIMEOUT_HEADERS) {
+    if (!socket[kWriting] || socket.writableNeedDrain || client[kRunning] > 1) {
+      assert(!paused, 'cannot be paused while waiting for headers')
+      util.destroy(socket, new HeadersTimeoutError())
+    }
+  } else if (timeoutType === TIMEOUT_BODY) {
+    if (!paused) {
+      util.destroy(socket, new BodyTimeoutError())
+    }
+  } else if (timeoutType === TIMEOUT_KEEP_ALIVE) {
+    assert(client[kRunning] === 0 && client[kKeepAliveTimeoutValue])
+    util.destroy(socket, new InformationalError('socket idle timeout'))
+  }
+}
+
+/**
+ * @param {import ('./client.js')} client
+ * @param {import('net').Socket} socket
+ * @returns
+ */
+function connectH1 (client, socket) {
+  client[kSocket] = socket
+
+  if (!llhttpInstance) {
+    llhttpInstance = lazyllhttp()
+  }
+
+  if (socket.errored) {
+    throw socket.errored
+  }
+
+  if (socket.destroyed) {
+    throw new SocketError('destroyed')
+  }
+
+  socket[kNoRef] = false
+  socket[kWriting] = false
+  socket[kReset] = false
+  socket[kBlocking] = false
+  socket[kParser] = new Parser(client, socket, llhttpInstance)
+
+  util.addListener(socket, 'error', onHttpSocketError)
+  util.addListener(socket, 'readable', onHttpSocketReadable)
+  util.addListener(socket, 'end', onHttpSocketEnd)
+  util.addListener(socket, 'close', onHttpSocketClose)
+
+  socket[kClosed] = false
+  socket.on('close', onSocketClose)
+
+  return {
+    version: 'h1',
+    defaultPipelining: 1,
+    write (request) {
+      return writeH1(client, request)
+    },
+    resume () {
+      resumeH1(client)
+    },
+    /**
+     * @param {Error|undefined} err
+     * @param {() => void} callback
+     */
+    destroy (err, callback) {
+      if (socket[kClosed]) {
+        queueMicrotask(callback)
+      } else {
+        socket.on('close', callback)
+        socket.destroy(err)
+      }
+    },
+    /**
+     * @returns {boolean}
+     */
+    get destroyed () {
+      return socket.destroyed
+    },
+    /**
+     * @param {import('../core/request.js')} request
+     * @returns {boolean}
+     */
+    busy (request) {
+      if (socket[kWriting] || socket[kReset] || socket[kBlocking]) {
+        return true
+      }
+
+      if (request) {
+        if (client[kRunning] > 0 && !request.idempotent) {
+          // Non-idempotent request cannot be retried.
+          // Ensure that no other requests are inflight and
+          // could cause failure.
+          return true
+        }
+
+        if (client[kRunning] > 0 && (request.upgrade || request.method === 'CONNECT')) {
+          // Don't dispatch an upgrade until all preceding requests have completed.
+          // A misbehaving server might upgrade the connection before all pipelined
+          // request has completed.
+          return true
+        }
+
+        if (client[kRunning] > 0 && util.bodyLength(request.body) !== 0 &&
+          (util.isStream(request.body) || util.isAsyncIterable(request.body) || util.isFormDataLike(request.body))) {
+          // Request with stream or iterator body can error while other requests
+          // are inflight and indirectly error those as well.
+          // Ensure this doesn't happen by waiting for inflight
+          // to complete before dispatching.
+
+          // Request with stream or iterator body cannot be retried.
+          // Ensure that no other requests are inflight and
+          // could cause failure.
+          return true
+        }
+      }
+
+      return false
+    }
+  }
+}
+
+function onHttpSocketError (err) {
+  assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
+
+  const parser = this[kParser]
+
+  // On Mac OS, we get an ECONNRESET even if there is a full body to be forwarded
+  // to the user.
+  if (err.code === 'ECONNRESET' && parser.statusCode && !parser.shouldKeepAlive) {
+    // We treat all incoming data so for as a valid response.
+    parser.onMessageComplete()
+    return
+  }
+
+  this[kError] = err
+
+  this[kClient][kOnError](err)
+}
+
+function onHttpSocketReadable () {
+  this[kParser]?.readMore()
+}
+
+function onHttpSocketEnd () {
+  const parser = this[kParser]
+
+  if (parser.statusCode && !parser.shouldKeepAlive) {
+    // We treat all incoming data so far as a valid response.
+    parser.onMessageComplete()
+    return
+  }
+
+  util.destroy(this, new SocketError('other side closed', util.getSocketInfo(this)))
+}
+
+function onHttpSocketClose () {
+  const parser = this[kParser]
+
+  if (parser) {
+    if (!this[kError] && parser.statusCode && !parser.shouldKeepAlive) {
+      // We treat all incoming data so far as a valid response.
+      parser.onMessageComplete()
+    }
+
+    this[kParser].destroy()
+    this[kParser] = null
+  }
+
+  const err = this[kError] || new SocketError('closed', util.getSocketInfo(this))
+
+  const client = this[kClient]
+
+  client[kSocket] = null
+  client[kHTTPContext] = null // TODO (fix): This is hacky...
+
+  if (client.destroyed) {
+    assert(client[kPending] === 0)
+
+    // Fail entire queue.
+    const requests = client[kQueue].splice(client[kRunningIdx])
+    for (let i = 0; i < requests.length; i++) {
+      const request = requests[i]
+      util.errorRequest(client, request, err)
+    }
+  } else if (client[kRunning] > 0 && err.code !== 'UND_ERR_INFO') {
+    // Fail head of pipeline.
+    const request = client[kQueue][client[kRunningIdx]]
+    client[kQueue][client[kRunningIdx]++] = null
+
+    util.errorRequest(client, request, err)
+  }
+
+  client[kPendingIdx] = client[kRunningIdx]
+
+  assert(client[kRunning] === 0)
+
+  client.emit('disconnect', client[kUrl], [client], err)
+
+  client[kResume]()
+}
+
+function onSocketClose () {
+  this[kClosed] = true
+}
+
+/**
+ * @param {import('./client.js')} client
+ */
+function resumeH1 (client) {
+  const socket = client[kSocket]
+
+  if (socket && !socket.destroyed) {
+    if (client[kSize] === 0) {
+      if (!socket[kNoRef] && socket.unref) {
+        socket.unref()
+        socket[kNoRef] = true
+      }
+    } else if (socket[kNoRef] && socket.ref) {
+      socket.ref()
+      socket[kNoRef] = false
+    }
+
+    if (client[kSize] === 0) {
+      if (socket[kParser].timeoutType !== TIMEOUT_KEEP_ALIVE) {
+        socket[kParser].setTimeout(client[kKeepAliveTimeoutValue], TIMEOUT_KEEP_ALIVE)
+      }
+    } else if (client[kRunning] > 0 && socket[kParser].statusCode < 200) {
+      if (socket[kParser].timeoutType !== TIMEOUT_HEADERS) {
+        const request = client[kQueue][client[kRunningIdx]]
+        const headersTimeout = request.headersTimeout != null
+          ? request.headersTimeout
+          : client[kHeadersTimeout]
+        socket[kParser].setTimeout(headersTimeout, TIMEOUT_HEADERS)
+      }
+    }
+  }
+}
+
+// https://www.rfc-editor.org/rfc/rfc7230#section-3.3.2
+function shouldSendContentLength (method) {
+  return method !== 'GET' && method !== 'HEAD' && method !== 'OPTIONS' && method !== 'TRACE' && method !== 'CONNECT'
+}
+
+/**
+ * @param {import('./client.js')} client
+ * @param {import('../core/request.js')} request
+ * @returns
+ */
+function writeH1 (client, request) {
+  const { method, path, host, upgrade, blocking, reset } = request
+
+  let { body, headers, contentLength } = request
+
+  // https://tools.ietf.org/html/rfc7231#section-4.3.1
+  // https://tools.ietf.org/html/rfc7231#section-4.3.2
+  // https://tools.ietf.org/html/rfc7231#section-4.3.5
+
+  // Sending a payload body on a request that does not
+  // expect it can cause undefined behavior on some
+  // servers and corrupt connection state. Do not
+  // re-use the connection for further requests.
+
+  const expectsPayload = (
+    method === 'PUT' ||
+    method === 'POST' ||
+    method === 'PATCH' ||
+    method === 'QUERY' ||
+    method === 'PROPFIND' ||
+    method === 'PROPPATCH'
+  )
+
+  if (util.isFormDataLike(body)) {
+    if (!extractBody) {
+      extractBody = require('../web/fetch/body.js').extractBody
+    }
+
+    const [bodyStream, contentType] = extractBody(body)
+    if (request.contentType == null) {
+      headers.push('content-type', contentType)
+    }
+    body = bodyStream.stream
+    contentLength = bodyStream.length
+  } else if (util.isBlobLike(body) && request.contentType == null && body.type) {
+    headers.push('content-type', body.type)
+  }
+
+  if (body && typeof body.read === 'function') {
+    // Try to read EOF in order to get length.
+    body.read(0)
+  }
+
+  const bodyLength = util.bodyLength(body)
+
+  contentLength = bodyLength ?? contentLength
+
+  if (contentLength === null) {
+    contentLength = request.contentLength
+  }
+
+  if (contentLength === 0 && !expectsPayload) {
+    // https://tools.ietf.org/html/rfc7230#section-3.3.2
+    // A user agent SHOULD NOT send a Content-Length header field when
+    // the request message does not contain a payload body and the method
+    // semantics do not anticipate such a body.
+
+    contentLength = null
+  }
+
+  // https://github.com/nodejs/undici/issues/2046
+  // A user agent may send a Content-Length header with 0 value, this should be allowed.
+  if (shouldSendContentLength(method) && contentLength > 0 && request.contentLength !== null && request.contentLength !== contentLength) {
+    if (client[kStrictContentLength]) {
+      util.errorRequest(client, request, new RequestContentLengthMismatchError())
+      return false
+    }
+
+    process.emitWarning(new RequestContentLengthMismatchError())
+  }
+
+  const socket = client[kSocket]
+
+  /**
+   * @param {Error} [err]
+   * @returns {void}
+   */
+  const abort = (err) => {
+    if (request.aborted || request.completed) {
+      return
+    }
+
+    util.errorRequest(client, request, err || new RequestAbortedError())
+
+    util.destroy(body)
+    util.destroy(socket, new InformationalError('aborted'))
+  }
+
+  try {
+    request.onConnect(abort)
+  } catch (err) {
+    util.errorRequest(client, request, err)
+  }
+
+  if (request.aborted) {
+    return false
+  }
+
+  if (method === 'HEAD') {
+    // https://github.com/mcollina/undici/issues/258
+    // Close after a HEAD request to interop with misbehaving servers
+    // that may send a body in the response.
+
+    socket[kReset] = true
+  }
+
+  if (upgrade || method === 'CONNECT') {
+    // On CONNECT or upgrade, block pipeline from dispatching further
+    // requests on this connection.
+
+    socket[kReset] = true
+  }
+
+  if (reset != null) {
+    socket[kReset] = reset
+  }
+
+  if (client[kMaxRequests] && socket[kCounter]++ >= client[kMaxRequests]) {
+    socket[kReset] = true
+  }
+
+  if (blocking) {
+    socket[kBlocking] = true
+  }
+
+  let header = `${method} ${path} HTTP/1.1\r\n`
+
+  if (typeof host === 'string') {
+    header += `host: ${host}\r\n`
+  } else {
+    header += client[kHostHeader]
+  }
+
+  if (upgrade) {
+    header += `connection: upgrade\r\nupgrade: ${upgrade}\r\n`
+  } else if (client[kPipelining] && !socket[kReset]) {
+    header += 'connection: keep-alive\r\n'
+  } else {
+    header += 'connection: close\r\n'
+  }
+
+  if (Array.isArray(headers)) {
+    for (let n = 0; n < headers.length; n += 2) {
+      const key = headers[n + 0]
+      const val = headers[n + 1]
+
+      if (Array.isArray(val)) {
+        for (let i = 0; i < val.length; i++) {
+          header += `${key}: ${val[i]}\r\n`
+        }
+      } else {
+        header += `${key}: ${val}\r\n`
+      }
+    }
+  }
+
+  if (channels.sendHeaders.hasSubscribers) {
+    channels.sendHeaders.publish({ request, headers: header, socket })
+  }
+
+  if (!body || bodyLength === 0) {
+    writeBuffer(abort, null, client, request, socket, contentLength, header, expectsPayload)
+  } else if (util.isBuffer(body)) {
+    writeBuffer(abort, body, client, request, socket, contentLength, header, expectsPayload)
+  } else if (util.isBlobLike(body)) {
+    if (typeof body.stream === 'function') {
+      writeIterable(abort, body.stream(), client, request, socket, contentLength, header, expectsPayload)
+    } else {
+      writeBlob(abort, body, client, request, socket, contentLength, header, expectsPayload)
+    }
+  } else if (util.isStream(body)) {
+    writeStream(abort, body, client, request, socket, contentLength, header, expectsPayload)
+  } else if (util.isIterable(body)) {
+    writeIterable(abort, body, client, request, socket, contentLength, header, expectsPayload)
+  } else {
+    assert(false)
+  }
+
+  return true
+}
+
+/**
+ * @param {AbortCallback} abort
+ * @param {import('stream').Stream} body
+ * @param {import('./client.js')} client
+ * @param {import('../core/request.js')} request
+ * @param {import('net').Socket} socket
+ * @param {number} contentLength
+ * @param {string} header
+ * @param {boolean} expectsPayload
+ */
+function writeStream (abort, body, client, request, socket, contentLength, header, expectsPayload) {
+  assert(contentLength !== 0 || client[kRunning] === 0, 'stream body cannot be pipelined')
+
+  let finished = false
+
+  const writer = new AsyncWriter({ abort, socket, request, contentLength, client, expectsPayload, header })
+
+  /**
+   * @param {Buffer} chunk
+   * @returns {void}
+   */
+  const onData = function (chunk) {
+    if (finished) {
+      return
+    }
+
+    try {
+      if (!writer.write(chunk) && this.pause) {
+        this.pause()
+      }
+    } catch (err) {
+      util.destroy(this, err)
+    }
+  }
+
+  /**
+   * @returns {void}
+   */
+  const onDrain = function () {
+    if (finished) {
+      return
+    }
+
+    if (body.resume) {
+      body.resume()
+    }
+  }
+
+  /**
+   * @returns {void}
+   */
+  const onClose = function () {
+    // 'close' might be emitted *before* 'error' for
+    // broken streams. Wait a tick to avoid this case.
+    queueMicrotask(() => {
+      // It's only safe to remove 'error' listener after
+      // 'close'.
+      body.removeListener('error', onFinished)
+    })
+
+    if (!finished) {
+      const err = new RequestAbortedError()
+      queueMicrotask(() => onFinished(err))
+    }
+  }
+
+  /**
+   * @param {Error} [err]
+   * @returns
+   */
+  const onFinished = function (err) {
+    if (finished) {
+      return
+    }
+
+    finished = true
+
+    assert(socket.destroyed || (socket[kWriting] && client[kRunning] <= 1))
+
+    socket
+      .off('drain', onDrain)
+      .off('error', onFinished)
+
+    body
+      .removeListener('data', onData)
+      .removeListener('end', onFinished)
+      .removeListener('close', onClose)
+
+    if (!err) {
+      try {
+        writer.end()
+      } catch (er) {
+        err = er
+      }
+    }
+
+    writer.destroy(err)
+
+    if (err && (err.code !== 'UND_ERR_INFO' || err.message !== 'reset')) {
+      util.destroy(body, err)
+    } else {
+      util.destroy(body)
+    }
+  }
+
+  body
+    .on('data', onData)
+    .on('end', onFinished)
+    .on('error', onFinished)
+    .on('close', onClose)
+
+  if (body.resume) {
+    body.resume()
+  }
+
+  socket
+    .on('drain', onDrain)
+    .on('error', onFinished)
+
+  if (body.errorEmitted ?? body.errored) {
+    setImmediate(onFinished, body.errored)
+  } else if (body.endEmitted ?? body.readableEnded) {
+    setImmediate(onFinished, null)
+  }
+
+  if (body.closeEmitted ?? body.closed) {
+    setImmediate(onClose)
+  }
+}
+
+/**
+ * @typedef AbortCallback
+ * @type {Function}
+ * @param {Error} [err]
+ * @returns {void}
+ */
+
+/**
+ * @param {AbortCallback} abort
+ * @param {Uint8Array|null} body
+ * @param {import('./client.js')} client
+ * @param {import('../core/request.js')} request
+ * @param {import('net').Socket} socket
+ * @param {number} contentLength
+ * @param {string} header
+ * @param {boolean} expectsPayload
+ * @returns {void}
+ */
+function writeBuffer (abort, body, client, request, socket, contentLength, header, expectsPayload) {
+  try {
+    if (!body) {
+      if (contentLength === 0) {
+        socket.write(`${header}content-length: 0\r\n\r\n`, 'latin1')
+      } else {
+        assert(contentLength === null, 'no body must not have content length')
+        socket.write(`${header}\r\n`, 'latin1')
+      }
+    } else if (util.isBuffer(body)) {
+      assert(contentLength === body.byteLength, 'buffer body must have content length')
+
+      socket.cork()
+      socket.write(`${header}content-length: ${contentLength}\r\n\r\n`, 'latin1')
+      socket.write(body)
+      socket.uncork()
+      request.onBodySent(body)
+
+      if (!expectsPayload && request.reset !== false) {
+        socket[kReset] = true
+      }
+    }
+    request.onRequestSent()
+
+    client[kResume]()
+  } catch (err) {
+    abort(err)
+  }
+}
+
+/**
+ * @param {AbortCallback} abort
+ * @param {Blob} body
+ * @param {import('./client.js')} client
+ * @param {import('../core/request.js')} request
+ * @param {import('net').Socket} socket
+ * @param {number} contentLength
+ * @param {string} header
+ * @param {boolean} expectsPayload
+ * @returns {Promise<void>}
+ */
+async function writeBlob (abort, body, client, request, socket, contentLength, header, expectsPayload) {
+  assert(contentLength === body.size, 'blob body must have content length')
+
+  try {
+    if (contentLength != null && contentLength !== body.size) {
+      throw new RequestContentLengthMismatchError()
+    }
+
+    const buffer = Buffer.from(await body.arrayBuffer())
+
+    socket.cork()
+    socket.write(`${header}content-length: ${contentLength}\r\n\r\n`, 'latin1')
+    socket.write(buffer)
+    socket.uncork()
+
+    request.onBodySent(buffer)
+    request.onRequestSent()
+
+    if (!expectsPayload && request.reset !== false) {
+      socket[kReset] = true
+    }
+
+    client[kResume]()
+  } catch (err) {
+    abort(err)
+  }
+}
+
+/**
+ * @param {AbortCallback} abort
+ * @param {Iterable} body
+ * @param {import('./client.js')} client
+ * @param {import('../core/request.js')} request
+ * @param {import('net').Socket} socket
+ * @param {number} contentLength
+ * @param {string} header
+ * @param {boolean} expectsPayload
+ * @returns {Promise<void>}
+ */
+async function writeIterable (abort, body, client, request, socket, contentLength, header, expectsPayload) {
+  assert(contentLength !== 0 || client[kRunning] === 0, 'iterator body cannot be pipelined')
+
+  let callback = null
+  function onDrain () {
+    if (callback) {
+      const cb = callback
+      callback = null
+      cb()
+    }
+  }
+
+  const waitForDrain = () => new Promise((resolve, reject) => {
+    assert(callback === null)
+
+    if (socket[kError]) {
+      reject(socket[kError])
+    } else {
+      callback = resolve
+    }
+  })
+
+  socket
+    .on('close', onDrain)
+    .on('drain', onDrain)
+
+  const writer = new AsyncWriter({ abort, socket, request, contentLength, client, expectsPayload, header })
+  try {
+    // It's up to the user to somehow abort the async iterable.
+    for await (const chunk of body) {
+      if (socket[kError]) {
+        throw socket[kError]
+      }
+
+      if (!writer.write(chunk)) {
+        await waitForDrain()
+      }
+    }
+
+    writer.end()
+  } catch (err) {
+    writer.destroy(err)
+  } finally {
+    socket
+      .off('close', onDrain)
+      .off('drain', onDrain)
+  }
+}
+
+class AsyncWriter {
+  /**
+   *
+   * @param {object} arg
+   * @param {AbortCallback} arg.abort
+   * @param {import('net').Socket} arg.socket
+   * @param {import('../core/request.js')} arg.request
+   * @param {number} arg.contentLength
+   * @param {import('./client.js')} arg.client
+   * @param {boolean} arg.expectsPayload
+   * @param {string} arg.header
+   */
+  constructor ({ abort, socket, request, contentLength, client, expectsPayload, header }) {
+    this.socket = socket
+    this.request = request
+    this.contentLength = contentLength
+    this.client = client
+    this.bytesWritten = 0
+    this.expectsPayload = expectsPayload
+    this.header = header
+    this.abort = abort
+
+    socket[kWriting] = true
+  }
+
+  /**
+   * @param {Buffer} chunk
+   * @returns
+   */
+  write (chunk) {
+    const { socket, request, contentLength, client, bytesWritten, expectsPayload, header } = this
+
+    if (socket[kError]) {
+      throw socket[kError]
+    }
+
+    if (socket.destroyed) {
+      return false
+    }
+
+    const len = Buffer.byteLength(chunk)
+    if (!len) {
+      return true
+    }
+
+    // We should defer writing chunks.
+    if (contentLength !== null && bytesWritten + len > contentLength) {
+      if (client[kStrictContentLength]) {
+        throw new RequestContentLengthMismatchError()
+      }
+
+      process.emitWarning(new RequestContentLengthMismatchError())
+    }
+
+    socket.cork()
+
+    if (bytesWritten === 0) {
+      if (!expectsPayload && request.reset !== false) {
+        socket[kReset] = true
+      }
+
+      if (contentLength === null) {
+        socket.write(`${header}transfer-encoding: chunked\r\n`, 'latin1')
+      } else {
+        socket.write(`${header}content-length: ${contentLength}\r\n\r\n`, 'latin1')
+      }
+    }
+
+    if (contentLength === null) {
+      socket.write(`\r\n${len.toString(16)}\r\n`, 'latin1')
+    }
+
+    this.bytesWritten += len
+
+    const ret = socket.write(chunk)
+
+    socket.uncork()
+
+    request.onBodySent(chunk)
+
+    if (!ret) {
+      if (socket[kParser].timeout && socket[kParser].timeoutType === TIMEOUT_HEADERS) {
+        if (socket[kParser].timeout.refresh) {
+          socket[kParser].timeout.refresh()
+        }
+      }
+    }
+
+    return ret
+  }
+
+  /**
+   * @returns {void}
+   */
+  end () {
+    const { socket, contentLength, client, bytesWritten, expectsPayload, header, request } = this
+    request.onRequestSent()
+
+    socket[kWriting] = false
+
+    if (socket[kError]) {
+      throw socket[kError]
+    }
+
+    if (socket.destroyed) {
+      return
+    }
+
+    if (bytesWritten === 0) {
+      if (expectsPayload) {
+        // https://tools.ietf.org/html/rfc7230#section-3.3.2
+        // A user agent SHOULD send a Content-Length in a request message when
+        // no Transfer-Encoding is sent and the request method defines a meaning
+        // for an enclosed payload body.
+
+        socket.write(`${header}content-length: 0\r\n\r\n`, 'latin1')
+      } else {
+        socket.write(`${header}\r\n`, 'latin1')
+      }
+    } else if (contentLength === null) {
+      socket.write('\r\n0\r\n\r\n', 'latin1')
+    }
+
+    if (contentLength !== null && bytesWritten !== contentLength) {
+      if (client[kStrictContentLength]) {
+        throw new RequestContentLengthMismatchError()
+      } else {
+        process.emitWarning(new RequestContentLengthMismatchError())
+      }
+    }
+
+    if (socket[kParser].timeout && socket[kParser].timeoutType === TIMEOUT_HEADERS) {
+      if (socket[kParser].timeout.refresh) {
+        socket[kParser].timeout.refresh()
+      }
+    }
+
+    client[kResume]()
+  }
+
+  /**
+   * @param {Error} [err]
+   * @returns {void}
+   */
+  destroy (err) {
+    const { socket, client, abort } = this
+
+    socket[kWriting] = false
+
+    if (err) {
+      assert(client[kRunning] <= 1, 'pipeline should only contain this request')
+      abort(err)
+    }
+  }
+}
+
+module.exports = connectH1