初始化

node_modules/undici/lib/api/abort-signal.js

@@ -0,0 +1,59 @@
+'use strict'
+
+const { addAbortListener } = require('../core/util')
+const { RequestAbortedError } = require('../core/errors')
+
+const kListener = Symbol('kListener')
+const kSignal = Symbol('kSignal')
+
+function abort (self) {
+  if (self.abort) {
+    self.abort(self[kSignal]?.reason)
+  } else {
+    self.reason = self[kSignal]?.reason ?? new RequestAbortedError()
+  }
+  removeSignal(self)
+}
+
+function addSignal (self, signal) {
+  self.reason = null
+
+  self[kSignal] = null
+  self[kListener] = null
+
+  if (!signal) {
+    return
+  }
+
+  if (signal.aborted) {
+    abort(self)
+    return
+  }
+
+  self[kSignal] = signal
+  self[kListener] = () => {
+    abort(self)
+  }
+
+  addAbortListener(self[kSignal], self[kListener])
+}
+
+function removeSignal (self) {
+  if (!self[kSignal]) {
+    return
+  }
+
+  if ('removeEventListener' in self[kSignal]) {
+    self[kSignal].removeEventListener('abort', self[kListener])
+  } else {
+    self[kSignal].removeListener('abort', self[kListener])
+  }
+
+  self[kSignal] = null
+  self[kListener] = null
+}
+
+module.exports = {
+  addSignal,
+  removeSignal
+}

node_modules/undici/lib/api/api-connect.js

@@ -0,0 +1,110 @@
+'use strict'
+
+const assert = require('node:assert')
+const { AsyncResource } = require('node:async_hooks')
+const { InvalidArgumentError, SocketError } = require('../core/errors')
+const util = require('../core/util')
+const { addSignal, removeSignal } = require('./abort-signal')
+
+class ConnectHandler extends AsyncResource {
+  constructor (opts, callback) {
+    if (!opts || typeof opts !== 'object') {
+      throw new InvalidArgumentError('invalid opts')
+    }
+
+    if (typeof callback !== 'function') {
+      throw new InvalidArgumentError('invalid callback')
+    }
+
+    const { signal, opaque, responseHeaders } = opts
+
+    if (signal && typeof signal.on !== 'function' && typeof signal.addEventListener !== 'function') {
+      throw new InvalidArgumentError('signal must be an EventEmitter or EventTarget')
+    }
+
+    super('UNDICI_CONNECT')
+
+    this.opaque = opaque || null
+    this.responseHeaders = responseHeaders || null
+    this.callback = callback
+    this.abort = null
+
+    addSignal(this, signal)
+  }
+
+  onConnect (abort, context) {
+    if (this.reason) {
+      abort(this.reason)
+      return
+    }
+
+    assert(this.callback)
+
+    this.abort = abort
+    this.context = context
+  }
+
+  onHeaders () {
+    throw new SocketError('bad connect', null)
+  }
+
+  onUpgrade (statusCode, rawHeaders, socket) {
+    const { callback, opaque, context } = this
+
+    removeSignal(this)
+
+    this.callback = null
+
+    let headers = rawHeaders
+    // Indicates is an HTTP2Session
+    if (headers != null) {
+      headers = this.responseHeaders === 'raw' ? util.parseRawHeaders(rawHeaders) : util.parseHeaders(rawHeaders)
+    }
+
+    this.runInAsyncScope(callback, null, null, {
+      statusCode,
+      headers,
+      socket,
+      opaque,
+      context
+    })
+  }
+
+  onError (err) {
+    const { callback, opaque } = this
+
+    removeSignal(this)
+
+    if (callback) {
+      this.callback = null
+      queueMicrotask(() => {
+        this.runInAsyncScope(callback, null, err, { opaque })
+      })
+    }
+  }
+}
+
+function connect (opts, callback) {
+  if (callback === undefined) {
+    return new Promise((resolve, reject) => {
+      connect.call(this, opts, (err, data) => {
+        return err ? reject(err) : resolve(data)
+      })
+    })
+  }
+
+  try {
+    const connectHandler = new ConnectHandler(opts, callback)
+    const connectOptions = { ...opts, method: 'CONNECT' }
+
+    this.dispatch(connectOptions, connectHandler)
+  } catch (err) {
+    if (typeof callback !== 'function') {
+      throw err
+    }
+    const opaque = opts?.opaque
+    queueMicrotask(() => callback(err, { opaque }))
+  }
+}
+
+module.exports = connect

node_modules/undici/lib/api/api-pipeline.js

@@ -0,0 +1,252 @@
+'use strict'
+
+const {
+  Readable,
+  Duplex,
+  PassThrough
+} = require('node:stream')
+const assert = require('node:assert')
+const { AsyncResource } = require('node:async_hooks')
+const {
+  InvalidArgumentError,
+  InvalidReturnValueError,
+  RequestAbortedError
+} = require('../core/errors')
+const util = require('../core/util')
+const { addSignal, removeSignal } = require('./abort-signal')
+
+function noop () {}
+
+const kResume = Symbol('resume')
+
+class PipelineRequest extends Readable {
+  constructor () {
+    super({ autoDestroy: true })
+
+    this[kResume] = null
+  }
+
+  _read () {
+    const { [kResume]: resume } = this
+
+    if (resume) {
+      this[kResume] = null
+      resume()
+    }
+  }
+
+  _destroy (err, callback) {
+    this._read()
+
+    callback(err)
+  }
+}
+
+class PipelineResponse extends Readable {
+  constructor (resume) {
+    super({ autoDestroy: true })
+    this[kResume] = resume
+  }
+
+  _read () {
+    this[kResume]()
+  }
+
+  _destroy (err, callback) {
+    if (!err && !this._readableState.endEmitted) {
+      err = new RequestAbortedError()
+    }
+
+    callback(err)
+  }
+}
+
+class PipelineHandler extends AsyncResource {
+  constructor (opts, handler) {
+    if (!opts || typeof opts !== 'object') {
+      throw new InvalidArgumentError('invalid opts')
+    }
+
+    if (typeof handler !== 'function') {
+      throw new InvalidArgumentError('invalid handler')
+    }
+
+    const { signal, method, opaque, onInfo, responseHeaders } = opts
+
+    if (signal && typeof signal.on !== 'function' && typeof signal.addEventListener !== 'function') {
+      throw new InvalidArgumentError('signal must be an EventEmitter or EventTarget')
+    }
+
+    if (method === 'CONNECT') {
+      throw new InvalidArgumentError('invalid method')
+    }
+
+    if (onInfo && typeof onInfo !== 'function') {
+      throw new InvalidArgumentError('invalid onInfo callback')
+    }
+
+    super('UNDICI_PIPELINE')
+
+    this.opaque = opaque || null
+    this.responseHeaders = responseHeaders || null
+    this.handler = handler
+    this.abort = null
+    this.context = null
+    this.onInfo = onInfo || null
+
+    this.req = new PipelineRequest().on('error', noop)
+
+    this.ret = new Duplex({
+      readableObjectMode: opts.objectMode,
+      autoDestroy: true,
+      read: () => {
+        const { body } = this
+
+        if (body?.resume) {
+          body.resume()
+        }
+      },
+      write: (chunk, encoding, callback) => {
+        const { req } = this
+
+        if (req.push(chunk, encoding) || req._readableState.destroyed) {
+          callback()
+        } else {
+          req[kResume] = callback
+        }
+      },
+      destroy: (err, callback) => {
+        const { body, req, res, ret, abort } = this
+
+        if (!err && !ret._readableState.endEmitted) {
+          err = new RequestAbortedError()
+        }
+
+        if (abort && err) {
+          abort()
+        }
+
+        util.destroy(body, err)
+        util.destroy(req, err)
+        util.destroy(res, err)
+
+        removeSignal(this)
+
+        callback(err)
+      }
+    }).on('prefinish', () => {
+      const { req } = this
+
+      // Node < 15 does not call _final in same tick.
+      req.push(null)
+    })
+
+    this.res = null
+
+    addSignal(this, signal)
+  }
+
+  onConnect (abort, context) {
+    const { res } = this
+
+    if (this.reason) {
+      abort(this.reason)
+      return
+    }
+
+    assert(!res, 'pipeline cannot be retried')
+
+    this.abort = abort
+    this.context = context
+  }
+
+  onHeaders (statusCode, rawHeaders, resume) {
+    const { opaque, handler, context } = this
+
+    if (statusCode < 200) {
+      if (this.onInfo) {
+        const headers = this.responseHeaders === 'raw' ? util.parseRawHeaders(rawHeaders) : util.parseHeaders(rawHeaders)
+        this.onInfo({ statusCode, headers })
+      }
+      return
+    }
+
+    this.res = new PipelineResponse(resume)
+
+    let body
+    try {
+      this.handler = null
+      const headers = this.responseHeaders === 'raw' ? util.parseRawHeaders(rawHeaders) : util.parseHeaders(rawHeaders)
+      body = this.runInAsyncScope(handler, null, {
+        statusCode,
+        headers,
+        opaque,
+        body: this.res,
+        context
+      })
+    } catch (err) {
+      this.res.on('error', noop)
+      throw err
+    }
+
+    if (!body || typeof body.on !== 'function') {
+      throw new InvalidReturnValueError('expected Readable')
+    }
+
+    body
+      .on('data', (chunk) => {
+        const { ret, body } = this
+
+        if (!ret.push(chunk) && body.pause) {
+          body.pause()
+        }
+      })
+      .on('error', (err) => {
+        const { ret } = this
+
+        util.destroy(ret, err)
+      })
+      .on('end', () => {
+        const { ret } = this
+
+        ret.push(null)
+      })
+      .on('close', () => {
+        const { ret } = this
+
+        if (!ret._readableState.ended) {
+          util.destroy(ret, new RequestAbortedError())
+        }
+      })
+
+    this.body = body
+  }
+
+  onData (chunk) {
+    const { res } = this
+    return res.push(chunk)
+  }
+
+  onComplete (trailers) {
+    const { res } = this
+    res.push(null)
+  }
+
+  onError (err) {
+    const { ret } = this
+    this.handler = null
+    util.destroy(ret, err)
+  }
+}
+
+function pipeline (opts, handler) {
+  try {
+    const pipelineHandler = new PipelineHandler(opts, handler)
+    this.dispatch({ ...opts, body: pipelineHandler.req }, pipelineHandler)
+    return pipelineHandler.ret
+  } catch (err) {
+    return new PassThrough().destroy(err)
+  }
+}
+
+module.exports = pipeline

node_modules/undici/lib/api/api-request.js

@@ -0,0 +1,213 @@
+'use strict'
+
+const assert = require('node:assert')
+const { AsyncResource } = require('node:async_hooks')
+const { Readable } = require('./readable')
+const { InvalidArgumentError, RequestAbortedError } = require('../core/errors')
+const util = require('../core/util')
+
+function noop () {}
+
+class RequestHandler extends AsyncResource {
+  constructor (opts, callback) {
+    if (!opts || typeof opts !== 'object') {
+      throw new InvalidArgumentError('invalid opts')
+    }
+
+    const { signal, method, opaque, body, onInfo, responseHeaders, highWaterMark } = opts
+
+    try {
+      if (typeof callback !== 'function') {
+        throw new InvalidArgumentError('invalid callback')
+      }
+
+      if (highWaterMark && (typeof highWaterMark !== 'number' || highWaterMark < 0)) {
+        throw new InvalidArgumentError('invalid highWaterMark')
+      }
+
+      if (signal && typeof signal.on !== 'function' && typeof signal.addEventListener !== 'function') {
+        throw new InvalidArgumentError('signal must be an EventEmitter or EventTarget')
+      }
+
+      if (method === 'CONNECT') {
+        throw new InvalidArgumentError('invalid method')
+      }
+
+      if (onInfo && typeof onInfo !== 'function') {
+        throw new InvalidArgumentError('invalid onInfo callback')
+      }
+
+      super('UNDICI_REQUEST')
+    } catch (err) {
+      if (util.isStream(body)) {
+        util.destroy(body.on('error', noop), err)
+      }
+      throw err
+    }
+
+    this.method = method
+    this.responseHeaders = responseHeaders || null
+    this.opaque = opaque || null
+    this.callback = callback
+    this.res = null
+    this.abort = null
+    this.body = body
+    this.trailers = {}
+    this.context = null
+    this.onInfo = onInfo || null
+    this.highWaterMark = highWaterMark
+    this.reason = null
+    this.removeAbortListener = null
+
+    if (signal?.aborted) {
+      this.reason = signal.reason ?? new RequestAbortedError()
+    } else if (signal) {
+      this.removeAbortListener = util.addAbortListener(signal, () => {
+        this.reason = signal.reason ?? new RequestAbortedError()
+        if (this.res) {
+          util.destroy(this.res.on('error', noop), this.reason)
+        } else if (this.abort) {
+          this.abort(this.reason)
+        }
+      })
+    }
+  }
+
+  onConnect (abort, context) {
+    if (this.reason) {
+      abort(this.reason)
+      return
+    }
+
+    assert(this.callback)
+
+    this.abort = abort
+    this.context = context
+  }
+
+  onHeaders (statusCode, rawHeaders, resume, statusMessage) {
+    const { callback, opaque, abort, context, responseHeaders, highWaterMark } = this
+
+    const headers = responseHeaders === 'raw' ? util.parseRawHeaders(rawHeaders) : util.parseHeaders(rawHeaders)
+
+    if (statusCode < 200) {
+      if (this.onInfo) {
+        this.onInfo({ statusCode, headers })
+      }
+      return
+    }
+
+    const parsedHeaders = responseHeaders === 'raw' ? util.parseHeaders(rawHeaders) : headers
+    const contentType = parsedHeaders['content-type']
+    const contentLength = parsedHeaders['content-length']
+    const res = new Readable({
+      resume,
+      abort,
+      contentType,
+      contentLength: this.method !== 'HEAD' && contentLength
+        ? Number(contentLength)
+        : null,
+      highWaterMark
+    })
+
+    if (this.removeAbortListener) {
+      res.on('close', this.removeAbortListener)
+      this.removeAbortListener = null
+    }
+
+    this.callback = null
+    this.res = res
+    if (callback !== null) {
+      try {
+        this.runInAsyncScope(callback, null, null, {
+          statusCode,
+          headers,
+          trailers: this.trailers,
+          opaque,
+          body: res,
+          context
+        })
+      } catch (err) {
+        // If the callback throws synchronously, we need to handle it
+        // Remove reference to res to allow res being garbage collected
+        this.res = null
+
+        // Destroy the response stream
+        util.destroy(res.on('error', noop), err)
+
+        // Use queueMicrotask to re-throw the error so it reaches uncaughtException
+        queueMicrotask(() => {
+          throw err
+        })
+      }
+    }
+  }
+
+  onData (chunk) {
+    return this.res.push(chunk)
+  }
+
+  onComplete (trailers) {
+    util.parseHeaders(trailers, this.trailers)
+    this.res.push(null)
+  }
+
+  onError (err) {
+    const { res, callback, body, opaque } = this
+
+    if (callback) {
+      // TODO: Does this need queueMicrotask?
+      this.callback = null
+      queueMicrotask(() => {
+        this.runInAsyncScope(callback, null, err, { opaque })
+      })
+    }
+
+    if (res) {
+      this.res = null
+      // Ensure all queued handlers are invoked before destroying res.
+      queueMicrotask(() => {
+        util.destroy(res.on('error', noop), err)
+      })
+    }
+
+    if (body) {
+      this.body = null
+
+      if (util.isStream(body)) {
+        body.on('error', noop)
+        util.destroy(body, err)
+      }
+    }
+
+    if (this.removeAbortListener) {
+      this.removeAbortListener()
+      this.removeAbortListener = null
+    }
+  }
+}
+
+function request (opts, callback) {
+  if (callback === undefined) {
+    return new Promise((resolve, reject) => {
+      request.call(this, opts, (err, data) => {
+        return err ? reject(err) : resolve(data)
+      })
+    })
+  }
+
+  try {
+    const handler = new RequestHandler(opts, callback)
+
+    this.dispatch(opts, handler)
+  } catch (err) {
+    if (typeof callback !== 'function') {
+      throw err
+    }
+    const opaque = opts?.opaque
+    queueMicrotask(() => callback(err, { opaque }))
+  }
+}
+
+module.exports = request
+module.exports.RequestHandler = RequestHandler

node_modules/undici/lib/api/api-stream.js

@@ -0,0 +1,209 @@
+'use strict'
+
+const assert = require('node:assert')
+const { finished } = require('node:stream')
+const { AsyncResource } = require('node:async_hooks')
+const { InvalidArgumentError, InvalidReturnValueError } = require('../core/errors')
+const util = require('../core/util')
+const { addSignal, removeSignal } = require('./abort-signal')
+
+function noop () {}
+
+class StreamHandler extends AsyncResource {
+  constructor (opts, factory, callback) {
+    if (!opts || typeof opts !== 'object') {
+      throw new InvalidArgumentError('invalid opts')
+    }
+
+    const { signal, method, opaque, body, onInfo, responseHeaders } = opts
+
+    try {
+      if (typeof callback !== 'function') {
+        throw new InvalidArgumentError('invalid callback')
+      }
+
+      if (typeof factory !== 'function') {
+        throw new InvalidArgumentError('invalid factory')
+      }
+
+      if (signal && typeof signal.on !== 'function' && typeof signal.addEventListener !== 'function') {
+        throw new InvalidArgumentError('signal must be an EventEmitter or EventTarget')
+      }
+
+      if (method === 'CONNECT') {
+        throw new InvalidArgumentError('invalid method')
+      }
+
+      if (onInfo && typeof onInfo !== 'function') {
+        throw new InvalidArgumentError('invalid onInfo callback')
+      }
+
+      super('UNDICI_STREAM')
+    } catch (err) {
+      if (util.isStream(body)) {
+        util.destroy(body.on('error', noop), err)
+      }
+      throw err
+    }
+
+    this.responseHeaders = responseHeaders || null
+    this.opaque = opaque || null
+    this.factory = factory
+    this.callback = callback
+    this.res = null
+    this.abort = null
+    this.context = null
+    this.trailers = null
+    this.body = body
+    this.onInfo = onInfo || null
+
+    if (util.isStream(body)) {
+      body.on('error', (err) => {
+        this.onError(err)
+      })
+    }
+
+    addSignal(this, signal)
+  }
+
+  onConnect (abort, context) {
+    if (this.reason) {
+      abort(this.reason)
+      return
+    }
+
+    assert(this.callback)
+
+    this.abort = abort
+    this.context = context
+  }
+
+  onHeaders (statusCode, rawHeaders, resume, statusMessage) {
+    const { factory, opaque, context, responseHeaders } = this
+
+    const headers = responseHeaders === 'raw' ? util.parseRawHeaders(rawHeaders) : util.parseHeaders(rawHeaders)
+
+    if (statusCode < 200) {
+      if (this.onInfo) {
+        this.onInfo({ statusCode, headers })
+      }
+      return
+    }
+
+    this.factory = null
+
+    if (factory === null) {
+      return
+    }
+
+    const res = this.runInAsyncScope(factory, null, {
+      statusCode,
+      headers,
+      opaque,
+      context
+    })
+
+    if (
+      !res ||
+      typeof res.write !== 'function' ||
+      typeof res.end !== 'function' ||
+      typeof res.on !== 'function'
+    ) {
+      throw new InvalidReturnValueError('expected Writable')
+    }
+
+    // TODO: Avoid finished. It registers an unnecessary amount of listeners.
+    finished(res, { readable: false }, (err) => {
+      const { callback, res, opaque, trailers, abort } = this
+
+      this.res = null
+      if (err || !res?.readable) {
+        util.destroy(res, err)
+      }
+
+      this.callback = null
+      this.runInAsyncScope(callback, null, err || null, { opaque, trailers })
+
+      if (err) {
+        abort()
+      }
+    })
+
+    res.on('drain', resume)
+
+    this.res = res
+
+    const needDrain = res.writableNeedDrain !== undefined
+      ? res.writableNeedDrain
+      : res._writableState?.needDrain
+
+    return needDrain !== true
+  }
+
+  onData (chunk) {
+    const { res } = this
+
+    return res ? res.write(chunk) : true
+  }
+
+  onComplete (trailers) {
+    const { res } = this
+
+    removeSignal(this)
+
+    if (!res) {
+      return
+    }
+
+    this.trailers = util.parseHeaders(trailers)
+
+    res.end()
+  }
+
+  onError (err) {
+    const { res, callback, opaque, body } = this
+
+    removeSignal(this)
+
+    this.factory = null
+
+    if (res) {
+      this.res = null
+      util.destroy(res, err)
+    } else if (callback) {
+      this.callback = null
+      queueMicrotask(() => {
+        this.runInAsyncScope(callback, null, err, { opaque })
+      })
+    }
+
+    if (body) {
+      this.body = null
+      util.destroy(body, err)
+    }
+  }
+}
+
+function stream (opts, factory, callback) {
+  if (callback === undefined) {
+    return new Promise((resolve, reject) => {
+      stream.call(this, opts, factory, (err, data) => {
+        return err ? reject(err) : resolve(data)
+      })
+    })
+  }
+
+  try {
+    const handler = new StreamHandler(opts, factory, callback)
+
+    this.dispatch(opts, handler)
+  } catch (err) {
+    if (typeof callback !== 'function') {
+      throw err
+    }
+    const opaque = opts?.opaque
+    queueMicrotask(() => callback(err, { opaque }))
+  }
+}
+
+module.exports = stream

node_modules/undici/lib/api/api-upgrade.js

@@ -0,0 +1,110 @@
+'use strict'
+
+const { InvalidArgumentError, SocketError } = require('../core/errors')
+const { AsyncResource } = require('node:async_hooks')
+const assert = require('node:assert')
+const util = require('../core/util')
+const { addSignal, removeSignal } = require('./abort-signal')
+
+class UpgradeHandler extends AsyncResource {
+  constructor (opts, callback) {
+    if (!opts || typeof opts !== 'object') {
+      throw new InvalidArgumentError('invalid opts')
+    }
+
+    if (typeof callback !== 'function') {
+      throw new InvalidArgumentError('invalid callback')
+    }
+
+    const { signal, opaque, responseHeaders } = opts
+
+    if (signal && typeof signal.on !== 'function' && typeof signal.addEventListener !== 'function') {
+      throw new InvalidArgumentError('signal must be an EventEmitter or EventTarget')
+    }
+
+    super('UNDICI_UPGRADE')
+
+    this.responseHeaders = responseHeaders || null
+    this.opaque = opaque || null
+    this.callback = callback
+    this.abort = null
+    this.context = null
+
+    addSignal(this, signal)
+  }
+
+  onConnect (abort, context) {
+    if (this.reason) {
+      abort(this.reason)
+      return
+    }
+
+    assert(this.callback)
+
+    this.abort = abort
+    this.context = null
+  }
+
+  onHeaders () {
+    throw new SocketError('bad upgrade', null)
+  }
+
+  onUpgrade (statusCode, rawHeaders, socket) {
+    assert(statusCode === 101)
+
+    const { callback, opaque, context } = this
+
+    removeSignal(this)
+
+    this.callback = null
+    const headers = this.responseHeaders === 'raw' ? util.parseRawHeaders(rawHeaders) : util.parseHeaders(rawHeaders)
+    this.runInAsyncScope(callback, null, null, {
+      headers,
+      socket,
+      opaque,
+      context
+    })
+  }
+
+  onError (err) {
+    const { callback, opaque } = this
+
+    removeSignal(this)
+
+    if (callback) {
+      this.callback = null
+      queueMicrotask(() => {
+        this.runInAsyncScope(callback, null, err, { opaque })
+      })
+    }
+  }
+}
+
+function upgrade (opts, callback) {
+  if (callback === undefined) {
+    return new Promise((resolve, reject) => {
+      upgrade.call(this, opts, (err, data) => {
+        return err ? reject(err) : resolve(data)
+      })
+    })
+  }
+
+  try {
+    const upgradeHandler = new UpgradeHandler(opts, callback)
+    const upgradeOpts = {
+      ...opts,
+      method: opts.method || 'GET',
+      upgrade: opts.protocol || 'Websocket'
+    }
+
+    this.dispatch(upgradeOpts, upgradeHandler)
+  } catch (err) {
+    if (typeof callback !== 'function') {
+      throw err
+    }
+    const opaque = opts?.opaque
+    queueMicrotask(() => callback(err, { opaque }))
+  }
+}
+
+module.exports = upgrade

node_modules/undici/lib/api/index.js

@@ -0,0 +1,7 @@
+'use strict'
+
+module.exports.request = require('./api-request')
+module.exports.stream = require('./api-stream')
+module.exports.pipeline = require('./api-pipeline')
+module.exports.upgrade = require('./api-upgrade')
+module.exports.connect = require('./api-connect')

node_modules/undici/lib/api/readable.js

@@ -0,0 +1,580 @@
+'use strict'
+
+const assert = require('node:assert')
+const { Readable } = require('node:stream')
+const { RequestAbortedError, NotSupportedError, InvalidArgumentError, AbortError } = require('../core/errors')
+const util = require('../core/util')
+const { ReadableStreamFrom } = require('../core/util')
+
+const kConsume = Symbol('kConsume')
+const kReading = Symbol('kReading')
+const kBody = Symbol('kBody')
+const kAbort = Symbol('kAbort')
+const kContentType = Symbol('kContentType')
+const kContentLength = Symbol('kContentLength')
+const kUsed = Symbol('kUsed')
+const kBytesRead = Symbol('kBytesRead')
+
+const noop = () => {}
+
+/**
+ * @class
+ * @extends {Readable}
+ * @see https://fetch.spec.whatwg.org/#body
+ */
+class BodyReadable extends Readable {
+  /**
+   * @param {object} opts
+   * @param {(this: Readable, size: number) => void} opts.resume
+   * @param {() => (void | null)} opts.abort
+   * @param {string} [opts.contentType = '']
+   * @param {number} [opts.contentLength]
+   * @param {number} [opts.highWaterMark = 64 * 1024]
+   */
+  constructor ({
+    resume,
+    abort,
+    contentType = '',
+    contentLength,
+    highWaterMark = 64 * 1024 // Same as nodejs fs streams.
+  }) {
+    super({
+      autoDestroy: true,
+      read: resume,
+      highWaterMark
+    })
+
+    this._readableState.dataEmitted = false
+
+    this[kAbort] = abort
+
+    /** @type {Consume | null} */
+    this[kConsume] = null
+
+    /** @type {number} */
+    this[kBytesRead] = 0
+
+    /** @type {ReadableStream|null} */
+    this[kBody] = null
+
+    /** @type {boolean} */
+    this[kUsed] = false
+
+    /** @type {string} */
+    this[kContentType] = contentType
+
+    /** @type {number|null} */
+    this[kContentLength] = Number.isFinite(contentLength) ? contentLength : null
+
+    /**
+     * Is stream being consumed through Readable API?
+     * This is an optimization so that we avoid checking
+     * for 'data' and 'readable' listeners in the hot path
+     * inside push().
+     *
+     * @type {boolean}
+     */
+    this[kReading] = false
+  }
+
+  /**
+   * @param {Error|null} err
+   * @param {(error:(Error|null)) => void} callback
+   * @returns {void}
+   */
+  _destroy (err, callback) {
+    if (!err && !this._readableState.endEmitted) {
+      err = new RequestAbortedError()
+    }
+
+    if (err) {
+      this[kAbort]()
+    }
+
+    // Workaround for Node "bug". If the stream is destroyed in same
+    // tick as it is created, then a user who is waiting for a
+    // promise (i.e micro tick) for installing an 'error' listener will
+    // never get a chance and will always encounter an unhandled exception.
+    if (!this[kUsed]) {
+      setImmediate(callback, err)
+    } else {
+      callback(err)
+    }
+  }
+
+  /**
+   * @param {string|symbol} event
+   * @param {(...args: any[]) => void} listener
+   * @returns {this}
+   */
+  on (event, listener) {
+    if (event === 'data' || event === 'readable') {
+      this[kReading] = true
+      this[kUsed] = true
+    }
+    return super.on(event, listener)
+  }
+
+  /**
+   * @param {string|symbol} event
+   * @param {(...args: any[]) => void} listener
+   * @returns {this}
+   */
+  addListener (event, listener) {
+    return this.on(event, listener)
+  }
+
+  /**
+   * @param {string|symbol} event
+   * @param {(...args: any[]) => void} listener
+   * @returns {this}
+   */
+  off (event, listener) {
+    const ret = super.off(event, listener)
+    if (event === 'data' || event === 'readable') {
+      this[kReading] = (
+        this.listenerCount('data') > 0 ||
+        this.listenerCount('readable') > 0
+      )
+    }
+    return ret
+  }
+
+  /**
+   * @param {string|symbol} event
+   * @param {(...args: any[]) => void} listener
+   * @returns {this}
+   */
+  removeListener (event, listener) {
+    return this.off(event, listener)
+  }
+
+  /**
+   * @param {Buffer|null} chunk
+   * @returns {boolean}
+   */
+  push (chunk) {
+    if (chunk) {
+      this[kBytesRead] += chunk.length
+      if (this[kConsume]) {
+        consumePush(this[kConsume], chunk)
+        return this[kReading] ? super.push(chunk) : true
+      }
+    }
+
+    return super.push(chunk)
+  }
+
+  /**
+   * Consumes and returns the body as a string.
+   *
+   * @see https://fetch.spec.whatwg.org/#dom-body-text
+   * @returns {Promise<string>}
+   */
+  text () {
+    return consume(this, 'text')
+  }
+
+  /**
+   * Consumes and returns the body as a JavaScript Object.
+   *
+   * @see https://fetch.spec.whatwg.org/#dom-body-json
+   * @returns {Promise<unknown>}
+   */
+  json () {
+    return consume(this, 'json')
+  }
+
+  /**
+   * Consumes and returns the body as a Blob
+   *
+   * @see https://fetch.spec.whatwg.org/#dom-body-blob
+   * @returns {Promise<Blob>}
+   */
+  blob () {
+    return consume(this, 'blob')
+  }
+
+  /**
+   * Consumes and returns the body as an Uint8Array.
+   *
+   * @see https://fetch.spec.whatwg.org/#dom-body-bytes
+   * @returns {Promise<Uint8Array>}
+   */
+  bytes () {
+    return consume(this, 'bytes')
+  }
+
+  /**
+   * Consumes and returns the body as an ArrayBuffer.
+   *
+   * @see https://fetch.spec.whatwg.org/#dom-body-arraybuffer
+   * @returns {Promise<ArrayBuffer>}
+   */
+  arrayBuffer () {
+    return consume(this, 'arrayBuffer')
+  }
+
+  /**
+   * Not implemented
+   *
+   * @see https://fetch.spec.whatwg.org/#dom-body-formdata
+   * @throws {NotSupportedError}
+   */
+  async formData () {
+    // TODO: Implement.
+    throw new NotSupportedError()
+  }
+
+  /**
+   * Returns true if the body is not null and the body has been consumed.
+   * Otherwise, returns false.
+   *
+   * @see https://fetch.spec.whatwg.org/#dom-body-bodyused
+   * @readonly
+   * @returns {boolean}
+   */
+  get bodyUsed () {
+    return util.isDisturbed(this)
+  }
+
+  /**
+   * @see https://fetch.spec.whatwg.org/#dom-body-body
+   * @readonly
+   * @returns {ReadableStream}
+   */
+  get body () {
+    if (!this[kBody]) {
+      this[kBody] = ReadableStreamFrom(this)
+      if (this[kConsume]) {
+        // TODO: Is this the best way to force a lock?
+        this[kBody].getReader() // Ensure stream is locked.
+        assert(this[kBody].locked)
+      }
+    }
+    return this[kBody]
+  }
+
+  /**
+   * Dumps the response body by reading `limit` number of bytes.
+   * @param {object} opts
+   * @param {number} [opts.limit = 131072] Number of bytes to read.
+   * @param {AbortSignal} [opts.signal] An AbortSignal to cancel the dump.
+   * @returns {Promise<null>}
+   */
+  dump (opts) {
+    const signal = opts?.signal
+
+    if (signal != null && (typeof signal !== 'object' || !('aborted' in signal))) {
+      return Promise.reject(new InvalidArgumentError('signal must be an AbortSignal'))
+    }
+
+    const limit = opts?.limit && Number.isFinite(opts.limit)
+      ? opts.limit
+      : 128 * 1024
+
+    if (signal?.aborted) {
+      return Promise.reject(signal.reason ?? new AbortError())
+    }
+
+    if (this._readableState.closeEmitted) {
+      return Promise.resolve(null)
+    }
+
+    return new Promise((resolve, reject) => {
+      if (
+        (this[kContentLength] && (this[kContentLength] > limit)) ||
+        this[kBytesRead] > limit
+      ) {
+        this.destroy(new AbortError())
+      }
+
+      if (signal) {
+        const onAbort = () => {
+          this.destroy(signal.reason ?? new AbortError())
+        }
+        signal.addEventListener('abort', onAbort)
+        this
+          .on('close', function () {
+            signal.removeEventListener('abort', onAbort)
+            if (signal.aborted) {
+              reject(signal.reason ?? new AbortError())
+            } else {
+              resolve(null)
+            }
+          })
+      } else {
+        this.on('close', resolve)
+      }
+
+      this
+        .on('error', noop)
+        .on('data', () => {
+          if (this[kBytesRead] > limit) {
+            this.destroy()
+          }
+        })
+        .resume()
+    })
+  }
+
+  /**
+   * @param {BufferEncoding} encoding
+   * @returns {this}
+   */
+  setEncoding (encoding) {
+    if (Buffer.isEncoding(encoding)) {
+      this._readableState.encoding = encoding
+    }
+    return this
+  }
+}
+
+/**
+ * @see https://streams.spec.whatwg.org/#readablestream-locked
+ * @param {BodyReadable} bodyReadable
+ * @returns {boolean}
+ */
+function isLocked (bodyReadable) {
+  // Consume is an implicit lock.
+  return bodyReadable[kBody]?.locked === true || bodyReadable[kConsume] !== null
+}
+
+/**
+ * @see https://fetch.spec.whatwg.org/#body-unusable
+ * @param {BodyReadable} bodyReadable
+ * @returns {boolean}
+ */
+function isUnusable (bodyReadable) {
+  return util.isDisturbed(bodyReadable) || isLocked(bodyReadable)
+}
+
+/**
+ * @typedef {'text' | 'json' | 'blob' | 'bytes' | 'arrayBuffer'} ConsumeType
+ */
+
+/**
+ * @template {ConsumeType} T
+ * @typedef {T extends 'text' ? string :
+ *           T extends 'json' ? unknown :
+ *           T extends 'blob' ? Blob :
+ *           T extends 'arrayBuffer' ? ArrayBuffer :
+ *           T extends 'bytes' ? Uint8Array :
+ *           never
+ * } ConsumeReturnType
+ */
+/**
+ * @typedef {object} Consume
+ * @property {ConsumeType} type
+ * @property {BodyReadable} stream
+ * @property {((value?: any) => void)} resolve
+ * @property {((err: Error) => void)} reject
+ * @property {number} length
+ * @property {Buffer[]} body
+ */
+
+/**
+ * @template {ConsumeType} T
+ * @param {BodyReadable} stream
+ * @param {T} type
+ * @returns {Promise<ConsumeReturnType<T>>}
+ */
+function consume (stream, type) {
+  assert(!stream[kConsume])
+
+  return new Promise((resolve, reject) => {
+    if (isUnusable(stream)) {
+      const rState = stream._readableState
+      if (rState.destroyed && rState.closeEmitted === false) {
+        stream
+          .on('error', reject)
+          .on('close', () => {
+            reject(new TypeError('unusable'))
+          })
+      } else {
+        reject(rState.errored ?? new TypeError('unusable'))
+      }
+    } else {
+      queueMicrotask(() => {
+        stream[kConsume] = {
+          type,
+          stream,
+          resolve,
+          reject,
+          length: 0,
+          body: []
+        }
+
+        stream
+          .on('error', function (err) {
+            consumeFinish(this[kConsume], err)
+          })
+          .on('close', function () {
+            if (this[kConsume].body !== null) {
+              consumeFinish(this[kConsume], new RequestAbortedError())
+            }
+          })
+
+        consumeStart(stream[kConsume])
+      })
+    }
+  })
+}
+
+/**
+ * @param {Consume} consume
+ * @returns {void}
+ */
+function consumeStart (consume) {
+  if (consume.body === null) {
+    return
+  }
+
+  const { _readableState: state } = consume.stream
+
+  if (state.bufferIndex) {
+    const start = state.bufferIndex
+    const end = state.buffer.length
+    for (let n = start; n < end; n++) {
+      consumePush(consume, state.buffer[n])
+    }
+  } else {
+    for (const chunk of state.buffer) {
+      consumePush(consume, chunk)
+    }
+  }
+
+  if (state.endEmitted) {
+    consumeEnd(this[kConsume], this._readableState.encoding)
+  } else {
+    consume.stream.on('end', function () {
+      consumeEnd(this[kConsume], this._readableState.encoding)
+    })
+  }
+
+  consume.stream.resume()
+
+  while (consume.stream.read() != null) {
+    // Loop
+  }
+}
+
+/**
+ * @param {Buffer[]} chunks
+ * @param {number} length
+ * @param {BufferEncoding} [encoding='utf8']
+ * @returns {string}
+ */
+function chunksDecode (chunks, length, encoding) {
+  if (chunks.length === 0 || length === 0) {
+    return ''
+  }
+  const buffer = chunks.length === 1 ? chunks[0] : Buffer.concat(chunks, length)
+  const bufferLength = buffer.length
+
+  // Skip BOM.
+  const start =
+    bufferLength > 2 &&
+    buffer[0] === 0xef &&
+    buffer[1] === 0xbb &&
+    buffer[2] === 0xbf
+      ? 3
+      : 0
+  if (!encoding || encoding === 'utf8' || encoding === 'utf-8') {
+    return buffer.utf8Slice(start, bufferLength)
+  } else {
+    return buffer.subarray(start, bufferLength).toString(encoding)
+  }
+}
+
+/**
+ * @param {Buffer[]} chunks
+ * @param {number} length
+ * @returns {Uint8Array}
+ */
+function chunksConcat (chunks, length) {
+  if (chunks.length === 0 || length === 0) {
+    return new Uint8Array(0)
+  }
+  if (chunks.length === 1) {
+    // fast-path
+    return new Uint8Array(chunks[0])
+  }
+  const buffer = new Uint8Array(Buffer.allocUnsafeSlow(length).buffer)
+
+  let offset = 0
+  for (let i = 0; i < chunks.length; ++i) {
+    const chunk = chunks[i]
+    buffer.set(chunk, offset)
+    offset += chunk.length
+  }
+
+  return buffer
+}
+
+/**
+ * @param {Consume} consume
+ * @param {BufferEncoding} encoding
+ * @returns {void}
+ */
+function consumeEnd (consume, encoding) {
+  const { type, body, resolve, stream, length } = consume
+
+  try {
+    if (type === 'text') {
+      resolve(chunksDecode(body, length, encoding))
+    } else if (type === 'json') {
+      resolve(JSON.parse(chunksDecode(body, length, encoding)))
+    } else if (type === 'arrayBuffer') {
+      resolve(chunksConcat(body, length).buffer)
+    } else if (type === 'blob') {
+      resolve(new Blob(body, { type: stream[kContentType] }))
+    } else if (type === 'bytes') {
+      resolve(chunksConcat(body, length))
+    }
+
+    consumeFinish(consume)
+  } catch (err) {
+    stream.destroy(err)
+  }
+}
+
+/**
+ * @param {Consume} consume
+ * @param {Buffer} chunk
+ * @returns {void}
+ */
+function consumePush (consume, chunk) {
+  consume.length += chunk.length
+  consume.body.push(chunk)
+}
+
+/**
+ * @param {Consume} consume
+ * @param {Error} [err]
+ * @returns {void}
+ */
+function consumeFinish (consume, err) {
+  if (consume.body === null) {
+    return
+  }
+
+  if (err) {
+    consume.reject(err)
+  } else {
+    consume.resolve()
+  }
+
+  // Reset the consume object to allow for garbage collection.
+  consume.type = null
+  consume.stream = null
+  consume.resolve = null
+  consume.reject = null
+  consume.length = 0
+  consume.body = null
+}
+
+module.exports = {
+  Readable: BodyReadable,
+  chunksDecode
+}