chore: base

node_modules/undici/lib/fetch/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Ethan Arrowood
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

node_modules/undici/lib/fetch/body.js

@@ -0,0 +1,402 @@
+'use strict'
+
+const util = require('../core/util')
+const { ReadableStreamFrom, toUSVString, isBlobLike } = require('./util')
+const { FormData } = require('./formdata')
+const { kState } = require('./symbols')
+const { webidl } = require('./webidl')
+const { Blob } = require('buffer')
+const { kBodyUsed } = require('../core/symbols')
+const assert = require('assert')
+const { NotSupportedError } = require('../core/errors')
+const { isErrored } = require('../core/util')
+const { isUint8Array, isArrayBuffer } = require('util/types')
+
+let ReadableStream
+
+async function * blobGen (blob) {
+  if (blob.stream) {
+    yield * blob.stream()
+  } else {
+    // istanbul ignore next: node < 16.7
+    yield await blob.arrayBuffer()
+  }
+}
+
+// https://fetch.spec.whatwg.org/#concept-bodyinit-extract
+function extractBody (object, keepalive = false) {
+  if (!ReadableStream) {
+    ReadableStream = require('stream/web').ReadableStream
+  }
+
+  // 1. Let stream be object if object is a ReadableStream object.
+  // Otherwise, let stream be a new ReadableStream, and set up stream.
+  let stream = null
+
+  // 2. Let action be null.
+  let action = null
+
+  // 3. Let source be null.
+  let source = null
+
+  // 4. Let length be null.
+  let length = null
+
+  // 5. Let Content-Type be null.
+  let contentType = null
+
+  // 6. Switch on object:
+  if (object == null) {
+    // Note: The IDL processor cannot handle this situation. See
+    // https://crbug.com/335871.
+  } else if (object instanceof URLSearchParams) {
+    // URLSearchParams
+
+    // spec says to run application/x-www-form-urlencoded on body.list
+    // this is implemented in Node.js as apart of an URLSearchParams instance toString method
+    // See: https://github.com/nodejs/node/blob/e46c680bf2b211bbd52cf959ca17ee98c7f657f5/lib/internal/url.js#L490
+    // and https://github.com/nodejs/node/blob/e46c680bf2b211bbd52cf959ca17ee98c7f657f5/lib/internal/url.js#L1100
+
+    // Set source to the result of running the application/x-www-form-urlencoded serializer with object’s list.
+    source = object.toString()
+
+    // Set Content-Type to `application/x-www-form-urlencoded;charset=UTF-8`.
+    contentType = 'application/x-www-form-urlencoded;charset=UTF-8'
+  } else if (isArrayBuffer(object) || ArrayBuffer.isView(object)) {
+    // BufferSource
+
+    if (object instanceof DataView) {
+      // TODO: Blob doesn't seem to work with DataView?
+      object = object.buffer
+    }
+
+    // Set source to a copy of the bytes held by object.
+    source = new Uint8Array(object)
+  } else if (util.isFormDataLike(object)) {
+    const boundary = '----formdata-undici-' + Math.random()
+    const prefix = `--${boundary}\r\nContent-Disposition: form-data`
+
+    /*! formdata-polyfill. MIT License. Jimmy Wärting <https://jimmy.warting.se/opensource> */
+    const escape = (str) =>
+      str.replace(/\n/g, '%0A').replace(/\r/g, '%0D').replace(/"/g, '%22')
+    const normalizeLinefeeds = (value) => value.replace(/\r?\n|\r/g, '\r\n')
+
+    // Set action to this step: run the multipart/form-data
+    // encoding algorithm, with object’s entry list and UTF-8.
+    action = async function * (object) {
+      const enc = new TextEncoder()
+
+      for (const [name, value] of object) {
+        if (typeof value === 'string') {
+          yield enc.encode(
+            prefix +
+              `; name="${escape(normalizeLinefeeds(name))}"` +
+              `\r\n\r\n${normalizeLinefeeds(value)}\r\n`
+          )
+        } else {
+          yield enc.encode(
+            prefix +
+              `; name="${escape(normalizeLinefeeds(name))}"` +
+              (value.name ? `; filename="${escape(value.name)}"` : '') +
+              '\r\n' +
+              `Content-Type: ${
+                value.type || 'application/octet-stream'
+              }\r\n\r\n`
+          )
+
+          yield * blobGen(value)
+
+          yield enc.encode('\r\n')
+        }
+      }
+
+      yield enc.encode(`--${boundary}--`)
+    }
+
+    // Set source to object.
+    source = object
+
+    // Set length to unclear, see html/6424 for improving this.
+    // TODO
+
+    // Set Content-Type to `multipart/form-data; boundary=`,
+    // followed by the multipart/form-data boundary string generated
+    // by the multipart/form-data encoding algorithm.
+    contentType = 'multipart/form-data; boundary=' + boundary
+  } else if (isBlobLike(object)) {
+    // Blob
+
+    // Set action to this step: read object.
+    action = blobGen
+
+    // Set source to object.
+    source = object
+
+    // Set length to object’s size.
+    length = object.size
+
+    // If object’s type attribute is not the empty byte sequence, set
+    // Content-Type to its value.
+    if (object.type) {
+      contentType = object.type
+    }
+  } else if (typeof object[Symbol.asyncIterator] === 'function') {
+    // If keepalive is true, then throw a TypeError.
+    if (keepalive) {
+      throw new TypeError('keepalive')
+    }
+
+    // If object is disturbed or locked, then throw a TypeError.
+    if (util.isDisturbed(object) || object.locked) {
+      throw new TypeError(
+        'Response body object should not be disturbed or locked'
+      )
+    }
+
+    stream =
+      object instanceof ReadableStream ? object : ReadableStreamFrom(object)
+  } else {
+    // TODO: byte sequence?
+    // TODO: scalar value string?
+    // TODO: else?
+    source = toUSVString(object)
+    contentType = 'text/plain;charset=UTF-8'
+  }
+
+  // 7. If source is a byte sequence, then set action to a
+  // step that returns source and length to source’s length.
+  // TODO: What is a "byte sequence?"
+  if (typeof source === 'string' || util.isBuffer(source)) {
+    length = Buffer.byteLength(source)
+  }
+
+  // 8. If action is non-null, then run these steps in in parallel:
+  if (action != null) {
+    // Run action.
+    let iterator
+    stream = new ReadableStream({
+      async start () {
+        iterator = action(object)[Symbol.asyncIterator]()
+      },
+      async pull (controller) {
+        const { value, done } = await iterator.next()
+        if (done) {
+          // When running action is done, close stream.
+          queueMicrotask(() => {
+            controller.close()
+          })
+        } else {
+          // Whenever one or more bytes are available and stream is not errored,
+          // enqueue a Uint8Array wrapping an ArrayBuffer containing the available
+          // bytes into stream.
+          if (!isErrored(stream)) {
+            controller.enqueue(new Uint8Array(value))
+          }
+        }
+        return controller.desiredSize > 0
+      },
+      async cancel (reason) {
+        await iterator.return()
+      }
+    })
+  } else if (!stream) {
+    // TODO: Spec doesn't say anything about this?
+    stream = new ReadableStream({
+      async pull (controller) {
+        controller.enqueue(
+          typeof source === 'string' ? new TextEncoder().encode(source) : source
+        )
+        queueMicrotask(() => {
+          controller.close()
+        })
+      }
+    })
+  }
+
+  // 9. Let body be a body whose stream is stream, source is source,
+  // and length is length.
+  const body = { stream, source, length }
+
+  // 10. Return body and Content-Type.
+  return [body, contentType]
+}
+
+// https://fetch.spec.whatwg.org/#bodyinit-safely-extract
+function safelyExtractBody (object, keepalive = false) {
+  if (!ReadableStream) {
+    // istanbul ignore next
+    ReadableStream = require('stream/web').ReadableStream
+  }
+
+  // To safely extract a body and a `Content-Type` value from
+  // a byte sequence or BodyInit object object, run these steps:
+
+  // 1. If object is a ReadableStream object, then:
+  if (object instanceof ReadableStream) {
+    // Assert: object is neither disturbed nor locked.
+    // istanbul ignore next
+    assert(!util.isDisturbed(object), 'disturbed')
+    // istanbul ignore next
+    assert(!object.locked, 'locked')
+  }
+
+  // 2. Return the results of extracting object.
+  return extractBody(object, keepalive)
+}
+
+function cloneBody (body) {
+  // To clone a body body, run these steps:
+
+  // https://fetch.spec.whatwg.org/#concept-body-clone
+
+  // 1. Let « out1, out2 » be the result of teeing body’s stream.
+  const [out1, out2] = body.stream.tee()
+
+  // 2. Set body’s stream to out1.
+  body.stream = out1
+
+  // 3. Return a body whose stream is out2 and other members are copied from body.
+  return {
+    stream: out2,
+    length: body.length,
+    source: body.source
+  }
+}
+
+function bodyMixinMethods (instance) {
+  const methods = {
+    async blob () {
+      if (!(this instanceof instance)) {
+        throw new TypeError('Illegal invocation')
+      }
+
+      const chunks = []
+
+      if (this[kState].body) {
+        if (isUint8Array(this[kState].body)) {
+          chunks.push(this[kState].body)
+        } else {
+          const stream = this[kState].body.stream
+
+          if (util.isDisturbed(stream)) {
+            throw new TypeError('disturbed')
+          }
+
+          if (stream.locked) {
+            throw new TypeError('locked')
+          }
+
+          // Compat.
+          stream[kBodyUsed] = true
+
+          for await (const chunk of stream) {
+            chunks.push(chunk)
+          }
+        }
+      }
+
+      return new Blob(chunks, { type: this.headers.get('Content-Type') || '' })
+    },
+
+    async arrayBuffer () {
+      if (!(this instanceof instance)) {
+        throw new TypeError('Illegal invocation')
+      }
+
+      const blob = await this.blob()
+      return await blob.arrayBuffer()
+    },
+
+    async text () {
+      if (!(this instanceof instance)) {
+        throw new TypeError('Illegal invocation')
+      }
+
+      const blob = await this.blob()
+      return toUSVString(await blob.text())
+    },
+
+    async json () {
+      if (!(this instanceof instance)) {
+        throw new TypeError('Illegal invocation')
+      }
+
+      return JSON.parse(await this.text())
+    },
+
+    async formData () {
+      if (!(this instanceof instance)) {
+        throw new TypeError('Illegal invocation')
+      }
+
+      const contentType = this.headers.get('Content-Type')
+
+      // If mimeType’s essence is "multipart/form-data", then:
+      if (/multipart\/form-data/.test(contentType)) {
+        throw new NotSupportedError('multipart/form-data not supported')
+      } else if (/application\/x-www-form-urlencoded/.test(contentType)) {
+        // Otherwise, if mimeType’s essence is "application/x-www-form-urlencoded", then:
+
+        // 1. Let entries be the result of parsing bytes.
+        let entries
+        try {
+          entries = new URLSearchParams(await this.text())
+        } catch (err) {
+          // istanbul ignore next: Unclear when new URLSearchParams can fail on a string.
+          // 2. If entries is failure, then throw a TypeError.
+          throw Object.assign(new TypeError(), { cause: err })
+        }
+
+        // 3. Return a new FormData object whose entries are entries.
+        const formData = new FormData()
+        for (const [name, value] of entries) {
+          formData.append(name, value)
+        }
+        return formData
+      } else {
+        // Otherwise, throw a TypeError.
+        webidl.errors.exception({
+          header: `${instance.name}.formData`,
+          value: 'Could not parse content as FormData.'
+        })
+      }
+    }
+  }
+
+  return methods
+}
+
+const properties = {
+  body: {
+    enumerable: true,
+    get () {
+      if (!this || !this[kState]) {
+        throw new TypeError('Illegal invocation')
+      }
+
+      return this[kState].body ? this[kState].body.stream : null
+    }
+  },
+  bodyUsed: {
+    enumerable: true,
+    get () {
+      if (!this || !this[kState]) {
+        throw new TypeError('Illegal invocation')
+      }
+
+      return !!this[kState].body && util.isDisturbed(this[kState].body.stream)
+    }
+  }
+}
+
+function mixinBody (prototype) {
+  Object.assign(prototype.prototype, bodyMixinMethods(prototype))
+  Object.defineProperties(prototype.prototype, properties)
+}
+
+module.exports = {
+  extractBody,
+  safelyExtractBody,
+  cloneBody,
+  mixinBody
+}

node_modules/undici/lib/fetch/constants.js

@@ -0,0 +1,88 @@
+'use strict'
+
+const corsSafeListedMethods = ['GET', 'HEAD', 'POST']
+
+const nullBodyStatus = [101, 204, 205, 304]
+
+const redirectStatus = [301, 302, 303, 307, 308]
+
+const referrerPolicy = [
+  '',
+  'no-referrer',
+  'no-referrer-when-downgrade',
+  'same-origin',
+  'origin',
+  'strict-origin',
+  'origin-when-cross-origin',
+  'strict-origin-when-cross-origin',
+  'unsafe-url'
+]
+
+const requestRedirect = ['follow', 'manual', 'error']
+
+const safeMethods = ['GET', 'HEAD', 'OPTIONS', 'TRACE']
+
+const requestMode = ['navigate', 'same-origin', 'no-cors', 'cors']
+
+const requestCredentials = ['omit', 'same-origin', 'include']
+
+const requestCache = [
+  'default',
+  'no-store',
+  'reload',
+  'no-cache',
+  'force-cache',
+  'only-if-cached'
+]
+
+const requestBodyHeader = [
+  'content-encoding',
+  'content-language',
+  'content-location',
+  'content-type'
+]
+
+// http://fetch.spec.whatwg.org/#forbidden-method
+const forbiddenMethods = ['CONNECT', 'TRACE', 'TRACK']
+
+const subresource = [
+  'audio',
+  'audioworklet',
+  'font',
+  'image',
+  'manifest',
+  'paintworklet',
+  'script',
+  'style',
+  'track',
+  'video',
+  'xslt',
+  ''
+]
+
+/** @type {globalThis['DOMException']} */
+const DOMException = globalThis.DOMException ?? (() => {
+  // DOMException was only made a global in Node v17.0.0,
+  // but fetch supports >= v16.5.
+  try {
+    atob('~')
+  } catch (err) {
+    return Object.getPrototypeOf(err).constructor
+  }
+})()
+
+module.exports = {
+  DOMException,
+  subresource,
+  forbiddenMethods,
+  requestBodyHeader,
+  referrerPolicy,
+  requestRedirect,
+  requestMode,
+  requestCredentials,
+  requestCache,
+  redirectStatus,
+  corsSafeListedMethods,
+  nullBodyStatus,
+  safeMethods
+}

node_modules/undici/lib/fetch/dataURL.js

@@ -0,0 +1,557 @@
+const assert = require('assert')
+const { atob } = require('buffer')
+
+const encoder = new TextEncoder()
+
+// https://fetch.spec.whatwg.org/#data-url-processor
+/** @param {URL} dataURL */
+function dataURLProcessor (dataURL) {
+  // 1. Assert: dataURL’s scheme is "data".
+  assert(dataURL.protocol === 'data:')
+
+  // 2. Let input be the result of running the URL
+  // serializer on dataURL with exclude fragment
+  // set to true.
+  let input = URLSerializer(dataURL, true)
+
+  // 3. Remove the leading "data:" string from input.
+  input = input.slice(5)
+
+  // 4. Let position point at the start of input.
+  const position = { position: 0 }
+
+  // 5. Let mimeType be the result of collecting a
+  // sequence of code points that are not equal
+  // to U+002C (,), given position.
+  let mimeType = collectASequenceOfCodePoints(
+    (char) => char !== ',',
+    input,
+    position
+  )
+
+  // 6. Strip leading and trailing ASCII whitespace
+  // from mimeType.
+  // Note: This will only remove U+0020 SPACE code
+  // points, if any.
+  // Undici implementation note: we need to store the
+  // length because if the mimetype has spaces removed,
+  // the wrong amount will be sliced from the input in
+  // step #9
+  const mimeTypeLength = mimeType.length
+  mimeType = mimeType.replace(/^(\u0020)+|(\u0020)+$/g, '')
+
+  // 7. If position is past the end of input, then
+  // return failure
+  if (position.position >= input.length) {
+    return 'failure'
+  }
+
+  // 8. Advance position by 1.
+  position.position++
+
+  // 9. Let encodedBody be the remainder of input.
+  const encodedBody = input.slice(mimeTypeLength + 1)
+
+  // 10. Let body be the percent-decoding of encodedBody.
+  /** @type {Uint8Array|string} */
+  let body = stringPercentDecode(encodedBody)
+
+  // 11. If mimeType ends with U+003B (;), followed by
+  // zero or more U+0020 SPACE, followed by an ASCII
+  // case-insensitive match for "base64", then:
+  if (/;(\u0020){0,}base64$/i.test(mimeType)) {
+    // 1. Let stringBody be the isomorphic decode of body.
+    const stringBody = decodeURIComponent(new TextDecoder('utf-8').decode(body))
+    // 2. Set body to the forgiving-base64 decode of
+    // stringBody.
+    body = forgivingBase64(stringBody)
+
+    // 3. If body is failure, then return failure.
+    if (body === 'failure') {
+      return 'failure'
+    }
+
+    // 4. Remove the last 6 code points from mimeType.
+    mimeType = mimeType.slice(0, -6)
+
+    // 5. Remove trailing U+0020 SPACE code points from mimeType,
+    // if any.
+    mimeType = mimeType.replace(/(\u0020)+$/, '')
+
+    // 6. Remove the last U+003B (;) code point from mimeType.
+    mimeType = mimeType.slice(0, -1)
+  }
+
+  // 12. If mimeType starts with U+003B (;), then prepend
+  // "text/plain" to mimeType.
+  if (mimeType.startsWith(';')) {
+    mimeType = 'text/plain' + mimeType
+  }
+
+  // 13. Let mimeTypeRecord be the result of parsing
+  // mimeType.
+  let mimeTypeRecord = parseMIMEType(mimeType)
+
+  // 14. If mimeTypeRecord is failure, then set
+  // mimeTypeRecord to text/plain;charset=US-ASCII.
+  if (mimeTypeRecord === 'failure') {
+    mimeTypeRecord = parseMIMEType('text/plain;charset=US-ASCII')
+  }
+
+  // 15. Return a new data: URL struct whose MIME
+  // type is mimeTypeRecord and body is body.
+  // https://fetch.spec.whatwg.org/#data-url-struct
+  return { mimeType: mimeTypeRecord, body }
+}
+
+// https://url.spec.whatwg.org/#concept-url-serializer
+/**
+ * @param {URL} url
+ * @param {boolean} excludeFragment
+ */
+function URLSerializer (url, excludeFragment = false) {
+  // 1. Let output be url’s scheme and U+003A (:) concatenated.
+  let output = url.protocol
+
+  // 2. If url’s host is non-null:
+  if (url.host.length > 0) {
+    // 1. Append "//" to output.
+    output += '//'
+
+    // 2. If url includes credentials, then:
+    if (url.username.length > 0 || url.password.length > 0) {
+      // 1. Append url’s username to output.
+      output += url.username
+
+      // 2. If url’s password is not the empty string, then append U+003A (:),
+      // followed by url’s password, to output.
+      if (url.password.length > 0) {
+        output += ':' + url.password
+      }
+
+      // 3. Append U+0040 (@) to output.
+      output += '@'
+    }
+
+    // 3. Append url’s host, serialized, to output.
+    output += decodeURIComponent(url.host)
+
+    // 4. If url’s port is non-null, append U+003A (:) followed by url’s port,
+    // serialized, to output.
+    if (url.port.length > 0) {
+      output += ':' + url.port
+    }
+  }
+
+  // 3. If url’s host is null, url does not have an opaque path,
+  // url’s path’s size is greater than 1, and url’s path[0]
+  // is the empty string, then append U+002F (/) followed by
+  // U+002E (.) to output.
+  // Note: This prevents web+demo:/.//not-a-host/ or web+demo:/path/..//not-a-host/,
+  // when parsed and then serialized, from ending up as web+demo://not-a-host/
+  // (they end up as web+demo:/.//not-a-host/).
+  // Undici implementation note: url's path[0] can never be an
+  // empty string, so we have to slightly alter what the spec says.
+  if (
+    url.host.length === 0 &&
+    url.pathname.length > 1 &&
+    url.href.slice(url.protocol.length + 1)[0] === '.'
+  ) {
+    output += '/.'
+  }
+
+  // 4. Append the result of URL path serializing url to output.
+  output += url.pathname
+
+  // 5. If url’s query is non-null, append U+003F (?),
+  // followed by url’s query, to output.
+  if (url.search.length > 0) {
+    output += url.search
+  }
+
+  // 6. If exclude fragment is false and url’s fragment is non-null,
+  // then append U+0023 (#), followed by url’s fragment, to output.
+  if (excludeFragment === false && url.hash.length > 0) {
+    output += url.hash
+  }
+
+  // 7. Return output.
+  return output
+}
+
+// https://infra.spec.whatwg.org/#collect-a-sequence-of-code-points
+/**
+ * @param {(char: string) => boolean} condition
+ * @param {string} input
+ * @param {{ position: number }} position
+ */
+function collectASequenceOfCodePoints (condition, input, position) {
+  // 1. Let result be the empty string.
+  let result = ''
+
+  // 2. While position doesn’t point past the end of input and the
+  // code point at position within input meets the condition condition:
+  while (position.position < input.length && condition(input[position.position])) {
+    // 1. Append that code point to the end of result.
+    result += input[position.position]
+
+    // 2. Advance position by 1.
+    position.position++
+  }
+
+  // 3. Return result.
+  return result
+}
+
+// https://url.spec.whatwg.org/#string-percent-decode
+/** @param {string} input */
+function stringPercentDecode (input) {
+  // 1. Let bytes be the UTF-8 encoding of input.
+  const bytes = encoder.encode(input)
+
+  // 2. Return the percent-decoding of bytes.
+  return percentDecode(bytes)
+}
+
+// https://url.spec.whatwg.org/#percent-decode
+/** @param {Uint8Array} input */
+function percentDecode (input) {
+  // 1. Let output be an empty byte sequence.
+  /** @type {number[]} */
+  const output = []
+
+  // 2. For each byte byte in input:
+  for (let i = 0; i < input.length; i++) {
+    const byte = input[i]
+
+    // 1. If byte is not 0x25 (%), then append byte to output.
+    if (byte !== 0x25) {
+      output.push(byte)
+
+    // 2. Otherwise, if byte is 0x25 (%) and the next two bytes
+    // after byte in input are not in the ranges
+    // 0x30 (0) to 0x39 (9), 0x41 (A) to 0x46 (F),
+    // and 0x61 (a) to 0x66 (f), all inclusive, append byte
+    // to output.
+    } else if (
+      byte === 0x25 &&
+      !/^[0-9A-Fa-f]{2}$/i.test(String.fromCharCode(input[i + 1], input[i + 2]))
+    ) {
+      output.push(0x25)
+
+    // 3. Otherwise:
+    } else {
+      // 1. Let bytePoint be the two bytes after byte in input,
+      // decoded, and then interpreted as hexadecimal number.
+      const nextTwoBytes = String.fromCharCode(input[i + 1], input[i + 2])
+      const bytePoint = Number.parseInt(nextTwoBytes, 16)
+
+      // 2. Append a byte whose value is bytePoint to output.
+      output.push(bytePoint)
+
+      // 3. Skip the next two bytes in input.
+      i += 2
+    }
+  }
+
+  // 3. Return output.
+  return Uint8Array.of(...output)
+}
+
+// https://mimesniff.spec.whatwg.org/#parse-a-mime-type
+/** @param {string} input */
+function parseMIMEType (input) {
+  // 1. Remove any leading and trailing HTTP whitespace
+  // from input.
+  input = input.trim()
+
+  // 2. Let position be a position variable for input,
+  // initially pointing at the start of input.
+  const position = { position: 0 }
+
+  // 3. Let type be the result of collecting a sequence
+  // of code points that are not U+002F (/) from
+  // input, given position.
+  const type = collectASequenceOfCodePoints(
+    (char) => char !== '/',
+    input,
+    position
+  )
+
+  // 4. If type is the empty string or does not solely
+  // contain HTTP token code points, then return failure.
+  // https://mimesniff.spec.whatwg.org/#http-token-code-point
+  if (type.length === 0 || !/^[!#$%&'*+-.^_|~A-z0-9]+$/.test(type)) {
+    return 'failure'
+  }
+
+  // 5. If position is past the end of input, then return
+  // failure
+  if (position.position > input.length) {
+    return 'failure'
+  }
+
+  // 6. Advance position by 1. (This skips past U+002F (/).)
+  position.position++
+
+  // 7. Let subtype be the result of collecting a sequence of
+  // code points that are not U+003B (;) from input, given
+  // position.
+  let subtype = collectASequenceOfCodePoints(
+    (char) => char !== ';',
+    input,
+    position
+  )
+
+  // 8. Remove any trailing HTTP whitespace from subtype.
+  subtype = subtype.trim()
+
+  // 9. If subtype is the empty string or does not solely
+  // contain HTTP token code points, then return failure.
+  if (subtype.length === 0 || !/^[!#$%&'*+-.^_|~A-z0-9]+$/.test(subtype)) {
+    return 'failure'
+  }
+
+  // 10. Let mimeType be a new MIME type record whose type
+  // is type, in ASCII lowercase, and subtype is subtype,
+  // in ASCII lowercase.
+  // https://mimesniff.spec.whatwg.org/#mime-type
+  const mimeType = {
+    type: type.toLowerCase(),
+    subtype: subtype.toLowerCase(),
+    /** @type {Map<string, string>} */
+    parameters: new Map()
+  }
+
+  // 11. While position is not past the end of input:
+  while (position.position < input.length) {
+    // 1. Advance position by 1. (This skips past U+003B (;).)
+    position.position++
+
+    // 2. Collect a sequence of code points that are HTTP
+    // whitespace from input given position.
+    collectASequenceOfCodePoints(
+      // https://fetch.spec.whatwg.org/#http-whitespace
+      (char) => /(\u000A|\u000D|\u0009|\u0020)/.test(char), // eslint-disable-line
+      input,
+      position
+    )
+
+    // 3. Let parameterName be the result of collecting a
+    // sequence of code points that are not U+003B (;)
+    // or U+003D (=) from input, given position.
+    let parameterName = collectASequenceOfCodePoints(
+      (char) => char !== ';' && char !== '=',
+      input,
+      position
+    )
+
+    // 4. Set parameterName to parameterName, in ASCII
+    // lowercase.
+    parameterName = parameterName.toLowerCase()
+
+    // 5. If position is not past the end of input, then:
+    if (position.position < input.length) {
+      // 1. If the code point at position within input is
+      // U+003B (;), then continue.
+      if (input[position.position] === ';') {
+        continue
+      }
+
+      // 2. Advance position by 1. (This skips past U+003D (=).)
+      position.position++
+    }
+
+    // 6. If position is past the end of input, then break.
+    if (position.position > input.length) {
+      break
+    }
+
+    // 7. Let parameterValue be null.
+    let parameterValue = null
+
+    // 8. If the code point at position within input is
+    // U+0022 ("), then:
+    if (input[position.position] === '"') {
+      // 1. Set parameterValue to the result of collecting
+      // an HTTP quoted string from input, given position
+      // and the extract-value flag.
+      // Undici implementation note: extract-value is never
+      // defined or mentioned anywhere.
+      parameterValue = collectAnHTTPQuotedString(input, position/*, extractValue */)
+
+      // 2. Collect a sequence of code points that are not
+      // U+003B (;) from input, given position.
+      collectASequenceOfCodePoints(
+        (char) => char !== ';',
+        input,
+        position
+      )
+
+    // 9. Otherwise:
+    } else {
+      // 1. Set parameterValue to the result of collecting
+      // a sequence of code points that are not U+003B (;)
+      // from input, given position.
+      parameterValue = collectASequenceOfCodePoints(
+        (char) => char !== ';',
+        input,
+        position
+      )
+
+      // 2. Remove any trailing HTTP whitespace from parameterValue.
+      parameterValue = parameterValue.trim()
+
+      // 3. If parameterValue is the empty string, then continue.
+      if (parameterValue.length === 0) {
+        continue
+      }
+    }
+
+    // 10. If all of the following are true
+    // - parameterName is not the empty string
+    // - parameterName solely contains HTTP token code points
+    // - parameterValue solely contains HTTP quoted-string token code points
+    // - mimeType’s parameters[parameterName] does not exist
+    // then set mimeType’s parameters[parameterName] to parameterValue.
+    if (
+      parameterName.length !== 0 &&
+      /^[!#$%&'*+-.^_|~A-z0-9]+$/.test(parameterName) &&
+      // https://mimesniff.spec.whatwg.org/#http-quoted-string-token-code-point
+      !/^(\u0009|\x{0020}-\x{007E}|\x{0080}-\x{00FF})+$/.test(parameterValue) &&  // eslint-disable-line
+      !mimeType.parameters.has(parameterName)
+    ) {
+      mimeType.parameters.set(parameterName, parameterValue)
+    }
+  }
+
+  // 12. Return mimeType.
+  return mimeType
+}
+
+// https://infra.spec.whatwg.org/#forgiving-base64-decode
+/** @param {string} data */
+function forgivingBase64 (data) {
+  // 1. Remove all ASCII whitespace from data.
+  data = data.replace(/[\u0009\u000A\u000C\u000D\u0020]/g, '')  // eslint-disable-line
+
+  // 2. If data’s code point length divides by 4 leaving
+  // no remainder, then:
+  if (data.length % 4 === 0) {
+    // 1. If data ends with one or two U+003D (=) code points,
+    // then remove them from data.
+    data = data.replace(/=?=$/, '')
+  }
+
+  // 3. If data’s code point length divides by 4 leaving
+  // a remainder of 1, then return failure.
+  if (data.length % 4 === 1) {
+    return 'failure'
+  }
+
+  // 4. If data contains a code point that is not one of
+  //  U+002B (+)
+  //  U+002F (/)
+  //  ASCII alphanumeric
+  // then return failure.
+  if (/[^+/0-9A-Za-z]/.test(data)) {
+    return 'failure'
+  }
+
+  const binary = atob(data)
+  const bytes = new Uint8Array(binary.length)
+
+  for (let byte = 0; byte < binary.length; byte++) {
+    bytes[byte] = binary.charCodeAt(byte)
+  }
+
+  return bytes
+}
+
+// https://fetch.spec.whatwg.org/#collect-an-http-quoted-string
+// tests: https://fetch.spec.whatwg.org/#example-http-quoted-string
+/**
+ * @param {string} input
+ * @param {{ position: number }} position
+ * @param {boolean?} extractValue
+ */
+function collectAnHTTPQuotedString (input, position, extractValue) {
+  // 1. Let positionStart be position.
+  const positionStart = position.position
+
+  // 2. Let value be the empty string.
+  let value = ''
+
+  // 3. Assert: the code point at position within input
+  // is U+0022 (").
+  assert(input[position.position] === '"')
+
+  // 4. Advance position by 1.
+  position.position++
+
+  // 5. While true:
+  while (true) {
+    // 1. Append the result of collecting a sequence of code points
+    // that are not U+0022 (") or U+005C (\) from input, given
+    // position, to value.
+    value += collectASequenceOfCodePoints(
+      (char) => char !== '"' && char !== '\\',
+      input,
+      position
+    )
+
+    // 2. If position is past the end of input, then break.
+    if (position.position >= input.length) {
+      break
+    }
+
+    // 3. Let quoteOrBackslash be the code point at position within
+    // input.
+    const quoteOrBackslash = input[position.position]
+
+    // 4. Advance position by 1.
+    position.position++
+
+    // 5. If quoteOrBackslash is U+005C (\), then:
+    if (quoteOrBackslash === '\\') {
+      // 1. If position is past the end of input, then append
+      // U+005C (\) to value and break.
+      if (position.position >= input.length) {
+        value += '\\'
+        break
+      }
+
+      // 2. Append the code point at position within input to value.
+      value += input[position.position]
+
+      // 3. Advance position by 1.
+      position.position++
+
+    // 6. Otherwise:
+    } else {
+      // 1. Assert: quoteOrBackslash is U+0022 (").
+      assert(quoteOrBackslash === '"')
+
+      // 2. Break.
+      break
+    }
+  }
+
+  // 6. If the extract-value flag is set, then return value.
+  if (extractValue) {
+    return value
+  }
+
+  // 7. Return the code points from positionStart to position,
+  // inclusive, within input.
+  return input.slice(positionStart, position.position)
+}
+
+module.exports = {
+  dataURLProcessor,
+  URLSerializer,
+  collectASequenceOfCodePoints,
+  stringPercentDecode,
+  parseMIMEType,
+  collectAnHTTPQuotedString
+}

node_modules/undici/lib/fetch/file.js

@@ -0,0 +1,313 @@
+'use strict'
+
+const { Blob } = require('buffer')
+const { types } = require('util')
+const { kState } = require('./symbols')
+const { isBlobLike } = require('./util')
+const { webidl } = require('./webidl')
+
+class File extends Blob {
+  constructor (fileBits, fileName, options = {}) {
+    // The File constructor is invoked with two or three parameters, depending
+    // on whether the optional dictionary parameter is used. When the File()
+    // constructor is invoked, user agents must run the following steps:
+    if (arguments.length < 2) {
+      throw new TypeError('2 arguments required')
+    }
+
+    fileBits = webidl.converters['sequence<BlobPart>'](fileBits)
+    fileName = webidl.converters.USVString(fileName)
+    options = webidl.converters.FilePropertyBag(options)
+
+    // 1. Let bytes be the result of processing blob parts given fileBits and
+    // options.
+    // Note: Blob handles this for us
+
+    // 2. Let n be the fileName argument to the constructor.
+    const n = fileName
+
+    // 3. Process FilePropertyBag dictionary argument by running the following
+    // substeps:
+
+    //    1. If the type member is provided and is not the empty string, let t
+    //    be set to the type dictionary member. If t contains any characters
+    //    outside the range U+0020 to U+007E, then set t to the empty string
+    //    and return from these substeps.
+    //    2. Convert every character in t to ASCII lowercase.
+    // Note: Blob handles both of these steps for us
+
+    //    3. If the lastModified member is provided, let d be set to the
+    //    lastModified dictionary member. If it is not provided, set d to the
+    //    current date and time represented as the number of milliseconds since
+    //    the Unix Epoch (which is the equivalent of Date.now() [ECMA-262]).
+    const d = options.lastModified
+
+    // 4. Return a new File object F such that:
+    // F refers to the bytes byte sequence.
+    // F.size is set to the number of total bytes in bytes.
+    // F.name is set to n.
+    // F.type is set to t.
+    // F.lastModified is set to d.
+
+    super(processBlobParts(fileBits, options), { type: options.type })
+    this[kState] = {
+      name: n,
+      lastModified: d
+    }
+  }
+
+  get name () {
+    if (!(this instanceof File)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].name
+  }
+
+  get lastModified () {
+    if (!(this instanceof File)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].lastModified
+  }
+
+  get [Symbol.toStringTag] () {
+    return this.constructor.name
+  }
+}
+
+class FileLike {
+  constructor (blobLike, fileName, options = {}) {
+    // TODO: argument idl type check
+
+    // The File constructor is invoked with two or three parameters, depending
+    // on whether the optional dictionary parameter is used. When the File()
+    // constructor is invoked, user agents must run the following steps:
+
+    // 1. Let bytes be the result of processing blob parts given fileBits and
+    // options.
+
+    // 2. Let n be the fileName argument to the constructor.
+    const n = fileName
+
+    // 3. Process FilePropertyBag dictionary argument by running the following
+    // substeps:
+
+    //    1. If the type member is provided and is not the empty string, let t
+    //    be set to the type dictionary member. If t contains any characters
+    //    outside the range U+0020 to U+007E, then set t to the empty string
+    //    and return from these substeps.
+    //    TODO
+    const t = options.type
+
+    //    2. Convert every character in t to ASCII lowercase.
+    //    TODO
+
+    //    3. If the lastModified member is provided, let d be set to the
+    //    lastModified dictionary member. If it is not provided, set d to the
+    //    current date and time represented as the number of milliseconds since
+    //    the Unix Epoch (which is the equivalent of Date.now() [ECMA-262]).
+    const d = options.lastModified ?? Date.now()
+
+    // 4. Return a new File object F such that:
+    // F refers to the bytes byte sequence.
+    // F.size is set to the number of total bytes in bytes.
+    // F.name is set to n.
+    // F.type is set to t.
+    // F.lastModified is set to d.
+
+    this[kState] = {
+      blobLike,
+      name: n,
+      type: t,
+      lastModified: d
+    }
+  }
+
+  stream (...args) {
+    if (!(this instanceof FileLike)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].blobLike.stream(...args)
+  }
+
+  arrayBuffer (...args) {
+    if (!(this instanceof FileLike)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].blobLike.arrayBuffer(...args)
+  }
+
+  slice (...args) {
+    if (!(this instanceof FileLike)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].blobLike.slice(...args)
+  }
+
+  text (...args) {
+    if (!(this instanceof FileLike)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].blobLike.text(...args)
+  }
+
+  get size () {
+    if (!(this instanceof FileLike)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].blobLike.size
+  }
+
+  get type () {
+    if (!(this instanceof FileLike)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].blobLike.type
+  }
+
+  get name () {
+    if (!(this instanceof FileLike)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].name
+  }
+
+  get lastModified () {
+    if (!(this instanceof FileLike)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kState].lastModified
+  }
+
+  get [Symbol.toStringTag] () {
+    return 'File'
+  }
+}
+
+webidl.converters.Blob = webidl.interfaceConverter(Blob)
+
+webidl.converters.BlobPart = function (V, opts) {
+  if (webidl.util.Type(V) === 'Object') {
+    if (isBlobLike(V)) {
+      return webidl.converters.Blob(V, { strict: false })
+    }
+
+    return webidl.converters.BufferSource(V, opts)
+  } else {
+    return webidl.converters.USVString(V, opts)
+  }
+}
+
+webidl.converters['sequence<BlobPart>'] = webidl.sequenceConverter(
+  webidl.converters.BlobPart
+)
+
+// https://www.w3.org/TR/FileAPI/#dfn-FilePropertyBag
+webidl.converters.FilePropertyBag = webidl.dictionaryConverter([
+  {
+    key: 'lastModified',
+    converter: webidl.converters['long long'],
+    get defaultValue () {
+      return Date.now()
+    }
+  },
+  {
+    key: 'type',
+    converter: webidl.converters.DOMString,
+    defaultValue: ''
+  },
+  {
+    key: 'endings',
+    converter: (value) => {
+      value = webidl.converters.DOMString(value)
+      value = value.toLowerCase()
+
+      if (value !== 'native') {
+        value = 'transparent'
+      }
+
+      return value
+    },
+    defaultValue: 'transparent'
+  }
+])
+
+/**
+ * @see https://www.w3.org/TR/FileAPI/#process-blob-parts
+ * @param {(NodeJS.TypedArray|Blob|string)[]} parts
+ * @param {{ type: string, endings: string }} options
+ */
+function processBlobParts (parts, options) {
+  // 1. Let bytes be an empty sequence of bytes.
+  /** @type {NodeJS.TypedArray[]} */
+  const bytes = []
+
+  // 2. For each element in parts:
+  for (const element of parts) {
+    // 1. If element is a USVString, run the following substeps:
+    if (typeof element === 'string') {
+      // 1. Let s be element.
+      let s = element
+
+      // 2. If the endings member of options is "native", set s
+      //    to the result of converting line endings to native
+      //    of element.
+      if (options.endings === 'native') {
+        s = convertLineEndingsNative(s)
+      }
+
+      // 3. Append the result of UTF-8 encoding s to bytes.
+      bytes.push(new TextEncoder().encode(s))
+    } else if (
+      types.isAnyArrayBuffer(element) ||
+      types.isTypedArray(element)
+    ) {
+      // 2. If element is a BufferSource, get a copy of the
+      //    bytes held by the buffer source, and append those
+      //    bytes to bytes.
+      if (!element.buffer) { // ArrayBuffer
+        bytes.push(new Uint8Array(element))
+      } else {
+        bytes.push(element.buffer)
+      }
+    } else if (isBlobLike(element)) {
+      // 3. If element is a Blob, append the bytes it represents
+      //    to bytes.
+      bytes.push(element)
+    }
+  }
+
+  // 3. Return bytes.
+  return bytes
+}
+
+/**
+ * @see https://www.w3.org/TR/FileAPI/#convert-line-endings-to-native
+ * @param {string} s
+ */
+function convertLineEndingsNative (s) {
+  // 1. Let native line ending be be the code point U+000A LF.
+  let nativeLineEnding = '\n'
+
+  // 2. If the underlying platform’s conventions are to
+  //    represent newlines as a carriage return and line feed
+  //    sequence, set native line ending to the code point
+  //    U+000D CR followed by the code point U+000A LF.
+  if (process.platform === 'win32') {
+    nativeLineEnding = '\r\n'
+  }
+
+  return s.replace(/\r?\n/g, nativeLineEnding)
+}
+
+module.exports = { File, FileLike }

node_modules/undici/lib/fetch/formdata.js

@@ -0,0 +1,321 @@
+'use strict'
+
+const { isBlobLike, isFileLike, toUSVString, makeIterator } = require('./util')
+const { kState } = require('./symbols')
+const { File, FileLike } = require('./file')
+const { webidl } = require('./webidl')
+const { Blob } = require('buffer')
+
+// https://xhr.spec.whatwg.org/#formdata
+class FormData {
+  static name = 'FormData'
+
+  constructor (form) {
+    if (arguments.length > 0 && form != null) {
+      webidl.errors.conversionFailed({
+        prefix: 'FormData constructor',
+        argument: 'Argument 1',
+        types: ['null']
+      })
+    }
+
+    this[kState] = []
+  }
+
+  append (name, value, filename = undefined) {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 2) {
+      throw new TypeError(
+        `Failed to execute 'append' on 'FormData': 2 arguments required, but only ${arguments.length} present.`
+      )
+    }
+
+    if (arguments.length === 3 && !isBlobLike(value)) {
+      throw new TypeError(
+        "Failed to execute 'append' on 'FormData': parameter 2 is not of type 'Blob'"
+      )
+    }
+
+    // 1. Let value be value if given; otherwise blobValue.
+
+    name = webidl.converters.USVString(name)
+    value = isBlobLike(value)
+      ? webidl.converters.Blob(value, { strict: false })
+      : webidl.converters.USVString(value)
+    filename = arguments.length === 3
+      ? webidl.converters.USVString(filename)
+      : undefined
+
+    // 2. Let entry be the result of creating an entry with
+    // name, value, and filename if given.
+    const entry = makeEntry(name, value, filename)
+
+    // 3. Append entry to this’s entry list.
+    this[kState].push(entry)
+  }
+
+  delete (name) {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'delete' on 'FormData': 1 arguments required, but only ${arguments.length} present.`
+      )
+    }
+
+    name = webidl.converters.USVString(name)
+
+    // The delete(name) method steps are to remove all entries whose name
+    // is name from this’s entry list.
+    const next = []
+    for (const entry of this[kState]) {
+      if (entry.name !== name) {
+        next.push(entry)
+      }
+    }
+
+    this[kState] = next
+  }
+
+  get (name) {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'get' on 'FormData': 1 arguments required, but only ${arguments.length} present.`
+      )
+    }
+
+    name = webidl.converters.USVString(name)
+
+    // 1. If there is no entry whose name is name in this’s entry list,
+    // then return null.
+    const idx = this[kState].findIndex((entry) => entry.name === name)
+    if (idx === -1) {
+      return null
+    }
+
+    // 2. Return the value of the first entry whose name is name from
+    // this’s entry list.
+    return this[kState][idx].value
+  }
+
+  getAll (name) {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'getAll' on 'FormData': 1 arguments required, but only ${arguments.length} present.`
+      )
+    }
+
+    name = webidl.converters.USVString(name)
+
+    // 1. If there is no entry whose name is name in this’s entry list,
+    // then return the empty list.
+    // 2. Return the values of all entries whose name is name, in order,
+    // from this’s entry list.
+    return this[kState]
+      .filter((entry) => entry.name === name)
+      .map((entry) => entry.value)
+  }
+
+  has (name) {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'has' on 'FormData': 1 arguments required, but only ${arguments.length} present.`
+      )
+    }
+
+    name = webidl.converters.USVString(name)
+
+    // The has(name) method steps are to return true if there is an entry
+    // whose name is name in this’s entry list; otherwise false.
+    return this[kState].findIndex((entry) => entry.name === name) !== -1
+  }
+
+  set (name, value, filename = undefined) {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 2) {
+      throw new TypeError(
+        `Failed to execute 'set' on 'FormData': 2 arguments required, but only ${arguments.length} present.`
+      )
+    }
+
+    if (arguments.length === 3 && !isBlobLike(value)) {
+      throw new TypeError(
+        "Failed to execute 'set' on 'FormData': parameter 2 is not of type 'Blob'"
+      )
+    }
+
+    // The set(name, value) and set(name, blobValue, filename) method steps
+    // are:
+
+    // 1. Let value be value if given; otherwise blobValue.
+
+    name = webidl.converters.USVString(name)
+    value = isBlobLike(value)
+      ? webidl.converters.Blob(value, { strict: false })
+      : webidl.converters.USVString(value)
+    filename = arguments.length === 3
+      ? toUSVString(filename)
+      : undefined
+
+    // 2. Let entry be the result of creating an entry with name, value, and
+    // filename if given.
+    const entry = makeEntry(name, value, filename)
+
+    // 3. If there are entries in this’s entry list whose name is name, then
+    // replace the first such entry with entry and remove the others.
+    const idx = this[kState].findIndex((entry) => entry.name === name)
+    if (idx !== -1) {
+      this[kState] = [
+        ...this[kState].slice(0, idx),
+        entry,
+        ...this[kState].slice(idx + 1).filter((entry) => entry.name !== name)
+      ]
+    } else {
+      // 4. Otherwise, append entry to this’s entry list.
+      this[kState].push(entry)
+    }
+  }
+
+  get [Symbol.toStringTag] () {
+    return this.constructor.name
+  }
+
+  entries () {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return makeIterator(
+      makeIterable(this[kState], 'entries'),
+      'FormData'
+    )
+  }
+
+  keys () {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return makeIterator(
+      makeIterable(this[kState], 'keys'),
+      'FormData'
+    )
+  }
+
+  values () {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return makeIterator(
+      makeIterable(this[kState], 'values'),
+      'FormData'
+    )
+  }
+
+  /**
+   * @param {(value: string, key: string, self: FormData) => void} callbackFn
+   * @param {unknown} thisArg
+   */
+  forEach (callbackFn, thisArg = globalThis) {
+    if (!(this instanceof FormData)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'forEach' on 'FormData': 1 argument required, but only ${arguments.length} present.`
+      )
+    }
+
+    if (typeof callbackFn !== 'function') {
+      throw new TypeError(
+        "Failed to execute 'forEach' on 'FormData': parameter 1 is not of type 'Function'."
+      )
+    }
+
+    for (const [key, value] of this) {
+      callbackFn.apply(thisArg, [value, key, this])
+    }
+  }
+}
+
+FormData.prototype[Symbol.iterator] = FormData.prototype.entries
+
+/**
+ * @see https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#create-an-entry
+ * @param {string} name
+ * @param {string|Blob} value
+ * @param {?string} filename
+ * @returns
+ */
+function makeEntry (name, value, filename) {
+  // 1. Set name to the result of converting name into a scalar value string.
+  // "To convert a string into a scalar value string, replace any surrogates
+  //  with U+FFFD."
+  // see: https://nodejs.org/dist/latest-v18.x/docs/api/buffer.html#buftostringencoding-start-end
+  name = Buffer.from(name).toString('utf8')
+
+  // 2. If value is a string, then set value to the result of converting
+  //    value into a scalar value string.
+  if (typeof value === 'string') {
+    value = Buffer.from(value).toString('utf8')
+  } else {
+    // 3. Otherwise:
+
+    // 1. If value is not a File object, then set value to a new File object,
+    //    representing the same bytes, whose name attribute value is "blob"
+    if (!isFileLike(value)) {
+      value = value instanceof Blob
+        ? new File([value], 'blob', { type: value.type })
+        : new FileLike(value, 'blob', { type: value.type })
+    }
+
+    // 2. If filename is given, then set value to a new File object,
+    //    representing the same bytes, whose name attribute is filename.
+    if (filename !== undefined) {
+      value = value instanceof File
+        ? new File([value], filename, { type: value.type })
+        : new FileLike(value, filename, { type: value.type })
+    }
+  }
+
+  // 4. Return an entry whose name is name and whose value is value.
+  return { name, value }
+}
+
+function * makeIterable (entries, type) {
+  // The value pairs to iterate over are this’s entry list’s entries
+  // with the key being the name and the value being the value.
+  for (const { name, value } of entries) {
+    if (type === 'entries') {
+      yield [name, value]
+    } else if (type === 'values') {
+      yield value
+    } else {
+      yield name
+    }
+  }
+}
+
+module.exports = { FormData }

node_modules/undici/lib/fetch/headers.js

@@ -0,0 +1,501 @@
+// https://github.com/Ethan-Arrowood/undici-fetch
+
+'use strict'
+
+const { kHeadersList } = require('../core/symbols')
+const { kGuard } = require('./symbols')
+const { kEnumerableProperty } = require('../core/util')
+const {
+  makeIterator,
+  isValidHeaderName,
+  isValidHeaderValue
+} = require('./util')
+const { webidl } = require('./webidl')
+
+const kHeadersMap = Symbol('headers map')
+const kHeadersSortedMap = Symbol('headers map sorted')
+
+/**
+ * @see https://fetch.spec.whatwg.org/#concept-header-value-normalize
+ * @param {string} potentialValue
+ */
+function headerValueNormalize (potentialValue) {
+  //  To normalize a byte sequence potentialValue, remove
+  //  any leading and trailing HTTP whitespace bytes from
+  //  potentialValue.
+  return potentialValue.replace(
+    /^[\r\n\t ]+|[\r\n\t ]+$/g,
+    ''
+  )
+}
+
+function fill (headers, object) {
+  // To fill a Headers object headers with a given object object, run these steps:
+
+  // 1. If object is a sequence, then for each header in object:
+  // Note: webidl conversion to array has already been done.
+  if (Array.isArray(object)) {
+    for (const header of object) {
+      // 1. If header does not contain exactly two items, then throw a TypeError.
+      if (header.length !== 2) {
+        webidl.errors.exception({
+          header: 'Headers constructor',
+          message: `expected name/value pair to be length 2, found ${header.length}.`
+        })
+      }
+
+      // 2. Append (header’s first item, header’s second item) to headers.
+      headers.append(header[0], header[1])
+    }
+  } else if (typeof object === 'object' && object !== null) {
+    // Note: null should throw
+
+    // 2. Otherwise, object is a record, then for each key → value in object,
+    //    append (key, value) to headers
+    for (const [key, value] of Object.entries(object)) {
+      headers.append(key, value)
+    }
+  } else {
+    webidl.errors.conversionFailed({
+      prefix: 'Headers constructor',
+      argument: 'Argument 1',
+      types: ['sequence<sequence<ByteString>>', 'record<ByteString, ByteString>']
+    })
+  }
+}
+
+class HeadersList {
+  constructor (init) {
+    if (init instanceof HeadersList) {
+      this[kHeadersMap] = new Map(init[kHeadersMap])
+      this[kHeadersSortedMap] = init[kHeadersSortedMap]
+    } else {
+      this[kHeadersMap] = new Map(init)
+      this[kHeadersSortedMap] = null
+    }
+  }
+
+  // https://fetch.spec.whatwg.org/#header-list-contains
+  contains (name) {
+    // A header list list contains a header name name if list
+    // contains a header whose name is a byte-case-insensitive
+    // match for name.
+    name = name.toLowerCase()
+
+    return this[kHeadersMap].has(name)
+  }
+
+  clear () {
+    this[kHeadersMap].clear()
+    this[kHeadersSortedMap] = null
+  }
+
+  // https://fetch.spec.whatwg.org/#concept-header-list-append
+  append (name, value) {
+    this[kHeadersSortedMap] = null
+
+    // 1. If list contains name, then set name to the first such
+    //    header’s name.
+    name = name.toLowerCase()
+    const exists = this[kHeadersMap].get(name)
+
+    // 2. Append (name, value) to list.
+    if (exists) {
+      this[kHeadersMap].set(name, `${exists}, ${value}`)
+    } else {
+      this[kHeadersMap].set(name, `${value}`)
+    }
+  }
+
+  // https://fetch.spec.whatwg.org/#concept-header-list-set
+  set (name, value) {
+    this[kHeadersSortedMap] = null
+
+    // 1. If list contains name, then set the value of
+    //    the first such header to value and remove the
+    //    others.
+    // 2. Otherwise, append header (name, value) to list.
+    return this[kHeadersMap].set(name, value)
+  }
+
+  // https://fetch.spec.whatwg.org/#concept-header-list-delete
+  delete (name) {
+    this[kHeadersSortedMap] = null
+
+    name = name.toLowerCase()
+    return this[kHeadersMap].delete(name)
+  }
+
+  // https://fetch.spec.whatwg.org/#concept-header-list-get
+  get (name) {
+    name = name.toLowerCase()
+
+    // 1. If list does not contain name, then return null.
+    if (!this.contains(name)) {
+      return null
+    }
+
+    // 2. Return the values of all headers in list whose name
+    //    is a byte-case-insensitive match for name,
+    //    separated from each other by 0x2C 0x20, in order.
+    return this[kHeadersMap].get(name) ?? null
+  }
+
+  has (name) {
+    name = name.toLowerCase()
+    return this[kHeadersMap].has(name)
+  }
+
+  keys () {
+    return this[kHeadersMap].keys()
+  }
+
+  values () {
+    return this[kHeadersMap].values()
+  }
+
+  entries () {
+    return this[kHeadersMap].entries()
+  }
+
+  [Symbol.iterator] () {
+    return this[kHeadersMap][Symbol.iterator]()
+  }
+}
+
+// https://fetch.spec.whatwg.org/#headers-class
+class Headers {
+  constructor (init = undefined) {
+    this[kHeadersList] = new HeadersList()
+
+    // The new Headers(init) constructor steps are:
+
+    // 1. Set this’s guard to "none".
+    this[kGuard] = 'none'
+
+    // 2. If init is given, then fill this with init.
+    if (init !== undefined) {
+      init = webidl.converters.HeadersInit(init)
+      fill(this, init)
+    }
+  }
+
+  get [Symbol.toStringTag] () {
+    return this.constructor.name
+  }
+
+  // https://fetch.spec.whatwg.org/#dom-headers-append
+  append (name, value) {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 2) {
+      throw new TypeError(
+        `Failed to execute 'append' on 'Headers': 2 arguments required, but only ${arguments.length} present.`
+      )
+    }
+
+    name = webidl.converters.ByteString(name)
+    value = webidl.converters.ByteString(value)
+
+    // 1. Normalize value.
+    value = headerValueNormalize(value)
+
+    // 2. If name is not a header name or value is not a
+    //    header value, then throw a TypeError.
+    if (!isValidHeaderName(name)) {
+      webidl.errors.invalidArgument({
+        prefix: 'Headers.append',
+        value: name,
+        type: 'header name'
+      })
+    } else if (!isValidHeaderValue(value)) {
+      webidl.errors.invalidArgument({
+        prefix: 'Headers.append',
+        value,
+        type: 'header value'
+      })
+    }
+
+    // 3. If headers’s guard is "immutable", then throw a TypeError.
+    // 4. Otherwise, if headers’s guard is "request" and name is a
+    //    forbidden header name, return.
+    // Note: undici does not implement forbidden header names
+    if (this[kGuard] === 'immutable') {
+      throw new TypeError('immutable')
+    } else if (this[kGuard] === 'request-no-cors') {
+      // 5. Otherwise, if headers’s guard is "request-no-cors":
+      // TODO
+    }
+
+    // 6. Otherwise, if headers’s guard is "response" and name is a
+    //    forbidden response-header name, return.
+
+    // 7. Append (name, value) to headers’s header list.
+    // 8. If headers’s guard is "request-no-cors", then remove
+    //    privileged no-CORS request headers from headers
+    return this[kHeadersList].append(name, value)
+  }
+
+  // https://fetch.spec.whatwg.org/#dom-headers-delete
+  delete (name) {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'delete' on 'Headers': 1 argument required, but only ${arguments.length} present.`
+      )
+    }
+
+    name = webidl.converters.ByteString(name)
+
+    // 1. If name is not a header name, then throw a TypeError.
+    if (!isValidHeaderName(name)) {
+      webidl.errors.invalidArgument({
+        prefix: 'Headers.delete',
+        value: name,
+        type: 'header name'
+      })
+    }
+
+    // 2. If this’s guard is "immutable", then throw a TypeError.
+    // 3. Otherwise, if this’s guard is "request" and name is a
+    //    forbidden header name, return.
+    // 4. Otherwise, if this’s guard is "request-no-cors", name
+    //    is not a no-CORS-safelisted request-header name, and
+    //    name is not a privileged no-CORS request-header name,
+    //    return.
+    // 5. Otherwise, if this’s guard is "response" and name is
+    //    a forbidden response-header name, return.
+    // Note: undici does not implement forbidden header names
+    if (this[kGuard] === 'immutable') {
+      throw new TypeError('immutable')
+    } else if (this[kGuard] === 'request-no-cors') {
+      // TODO
+    }
+
+    // 6. If this’s header list does not contain name, then
+    //    return.
+    if (!this[kHeadersList].contains(name)) {
+      return
+    }
+
+    // 7. Delete name from this’s header list.
+    // 8. If this’s guard is "request-no-cors", then remove
+    //    privileged no-CORS request headers from this.
+    return this[kHeadersList].delete(name)
+  }
+
+  // https://fetch.spec.whatwg.org/#dom-headers-get
+  get (name) {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'get' on 'Headers': 1 argument required, but only ${arguments.length} present.`
+      )
+    }
+
+    name = webidl.converters.ByteString(name)
+
+    // 1. If name is not a header name, then throw a TypeError.
+    if (!isValidHeaderName(name)) {
+      webidl.errors.invalidArgument({
+        prefix: 'Headers.get',
+        value: name,
+        type: 'header name'
+      })
+    }
+
+    // 2. Return the result of getting name from this’s header
+    //    list.
+    return this[kHeadersList].get(name)
+  }
+
+  // https://fetch.spec.whatwg.org/#dom-headers-has
+  has (name) {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'has' on 'Headers': 1 argument required, but only ${arguments.length} present.`
+      )
+    }
+
+    name = webidl.converters.ByteString(name)
+
+    // 1. If name is not a header name, then throw a TypeError.
+    if (!isValidHeaderName(name)) {
+      webidl.errors.invalidArgument({
+        prefix: 'Headers.has',
+        value: name,
+        type: 'header name'
+      })
+    }
+
+    // 2. Return true if this’s header list contains name;
+    //    otherwise false.
+    return this[kHeadersList].contains(name)
+  }
+
+  // https://fetch.spec.whatwg.org/#dom-headers-set
+  set (name, value) {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 2) {
+      throw new TypeError(
+        `Failed to execute 'set' on 'Headers': 2 arguments required, but only ${arguments.length} present.`
+      )
+    }
+
+    name = webidl.converters.ByteString(name)
+    value = webidl.converters.ByteString(value)
+
+    // 1. Normalize value.
+    value = headerValueNormalize(value)
+
+    // 2. If name is not a header name or value is not a
+    //    header value, then throw a TypeError.
+    if (!isValidHeaderName(name)) {
+      webidl.errors.invalidArgument({
+        prefix: 'Headers.set',
+        value: name,
+        type: 'header name'
+      })
+    } else if (!isValidHeaderValue(value)) {
+      webidl.errors.invalidArgument({
+        prefix: 'Headers.set',
+        value,
+        type: 'header value'
+      })
+    }
+
+    // 3. If this’s guard is "immutable", then throw a TypeError.
+    // 4. Otherwise, if this’s guard is "request" and name is a
+    //    forbidden header name, return.
+    // 5. Otherwise, if this’s guard is "request-no-cors" and
+    //    name/value is not a no-CORS-safelisted request-header,
+    //    return.
+    // 6. Otherwise, if this’s guard is "response" and name is a
+    //    forbidden response-header name, return.
+    // Note: undici does not implement forbidden header names
+    if (this[kGuard] === 'immutable') {
+      throw new TypeError('immutable')
+    } else if (this[kGuard] === 'request-no-cors') {
+      // TODO
+    }
+
+    // 7. Set (name, value) in this’s header list.
+    // 8. If this’s guard is "request-no-cors", then remove
+    //    privileged no-CORS request headers from this
+    return this[kHeadersList].set(name, value)
+  }
+
+  get [kHeadersSortedMap] () {
+    this[kHeadersList][kHeadersSortedMap] ??= new Map([...this[kHeadersList]].sort((a, b) => a[0] < b[0] ? -1 : 1))
+    return this[kHeadersList][kHeadersSortedMap]
+  }
+
+  keys () {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return makeIterator(this[kHeadersSortedMap].keys(), 'Headers')
+  }
+
+  values () {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return makeIterator(this[kHeadersSortedMap].values(), 'Headers')
+  }
+
+  entries () {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return makeIterator(this[kHeadersSortedMap].entries(), 'Headers')
+  }
+
+  /**
+   * @param {(value: string, key: string, self: Headers) => void} callbackFn
+   * @param {unknown} thisArg
+   */
+  forEach (callbackFn, thisArg = globalThis) {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'forEach' on 'Headers': 1 argument required, but only ${arguments.length} present.`
+      )
+    }
+
+    if (typeof callbackFn !== 'function') {
+      throw new TypeError(
+        "Failed to execute 'forEach' on 'Headers': parameter 1 is not of type 'Function'."
+      )
+    }
+
+    for (const [key, value] of this) {
+      callbackFn.apply(thisArg, [value, key, this])
+    }
+  }
+
+  [Symbol.for('nodejs.util.inspect.custom')] () {
+    if (!(this instanceof Headers)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    return this[kHeadersList]
+  }
+}
+
+Headers.prototype[Symbol.iterator] = Headers.prototype.entries
+
+Object.defineProperties(Headers.prototype, {
+  append: kEnumerableProperty,
+  delete: kEnumerableProperty,
+  get: kEnumerableProperty,
+  has: kEnumerableProperty,
+  set: kEnumerableProperty,
+  keys: kEnumerableProperty,
+  values: kEnumerableProperty,
+  entries: kEnumerableProperty,
+  forEach: kEnumerableProperty
+})
+
+webidl.converters.HeadersInit = function (V) {
+  if (webidl.util.Type(V) === 'Object') {
+    if (V[Symbol.iterator]) {
+      return webidl.converters['sequence<sequence<ByteString>>'](V)
+    }
+
+    return webidl.converters['record<ByteString, ByteString>'](V)
+  }
+
+  webidl.errors.conversionFailed({
+    prefix: 'Headers constructor',
+    argument: 'Argument 1',
+    types: ['sequence<sequence<ByteString>>', 'record<ByteString, ByteString>']
+  })
+}
+
+module.exports = {
+  fill,
+  Headers,
+  HeadersList
+}

node_modules/undici/lib/fetch/request.js

@@ -0,0 +1,926 @@
+/* globals AbortController */
+
+'use strict'
+
+const { extractBody, mixinBody, cloneBody } = require('./body')
+const { Headers, fill: fillHeaders, HeadersList } = require('./headers')
+const util = require('../core/util')
+const {
+  isValidHTTPToken,
+  sameOrigin,
+  normalizeMethod
+} = require('./util')
+const {
+  forbiddenMethods,
+  corsSafeListedMethods,
+  referrerPolicy,
+  requestRedirect,
+  requestMode,
+  requestCredentials,
+  requestCache
+} = require('./constants')
+const { kEnumerableProperty } = util
+const { kHeaders, kSignal, kState, kGuard, kRealm } = require('./symbols')
+const { webidl } = require('./webidl')
+const { kHeadersList } = require('../core/symbols')
+const assert = require('assert')
+
+let TransformStream
+
+const kInit = Symbol('init')
+
+const requestFinalizer = new FinalizationRegistry(({ signal, abort }) => {
+  signal.removeEventListener('abort', abort)
+})
+
+// https://fetch.spec.whatwg.org/#request-class
+class Request {
+  // https://fetch.spec.whatwg.org/#dom-request
+  constructor (input, init = {}) {
+    if (input === kInit) {
+      return
+    }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to construct 'Request': 1 argument required, but only ${arguments.length} present.`
+      )
+    }
+
+    input = webidl.converters.RequestInfo(input)
+    init = webidl.converters.RequestInit(init)
+
+    // TODO
+    this[kRealm] = { settingsObject: {} }
+
+    // 1. Let request be null.
+    let request = null
+
+    // 2. Let fallbackMode be null.
+    let fallbackMode = null
+
+    // 3. Let baseURL be this’s relevant settings object’s API base URL.
+    const baseUrl = this[kRealm].settingsObject.baseUrl
+
+    // 4. Let signal be null.
+    let signal = null
+
+    // 5. If input is a string, then:
+    if (typeof input === 'string') {
+      // 1. Let parsedURL be the result of parsing input with baseURL.
+      // 2. If parsedURL is failure, then throw a TypeError.
+      let parsedURL
+      try {
+        parsedURL = new URL(input, baseUrl)
+      } catch (err) {
+        throw new TypeError('Failed to parse URL from ' + input, { cause: err })
+      }
+
+      // 3. If parsedURL includes credentials, then throw a TypeError.
+      if (parsedURL.username || parsedURL.password) {
+        throw new TypeError(
+          'Request cannot be constructed from a URL that includes credentials: ' +
+            input
+        )
+      }
+
+      // 4. Set request to a new request whose URL is parsedURL.
+      request = makeRequest({ urlList: [parsedURL] })
+
+      // 5. Set fallbackMode to "cors".
+      fallbackMode = 'cors'
+    } else {
+      // 6. Otherwise:
+
+      // 7. Assert: input is a Request object.
+      assert(input instanceof Request)
+
+      // 8. Set request to input’s request.
+      request = input[kState]
+
+      // 9. Set signal to input’s signal.
+      signal = input[kSignal]
+    }
+
+    // 7. Let origin be this’s relevant settings object’s origin.
+    const origin = this[kRealm].settingsObject.origin
+
+    // 8. Let window be "client".
+    let window = 'client'
+
+    // 9. If request’s window is an environment settings object and its origin
+    // is same origin with origin, then set window to request’s window.
+    if (
+      request.window?.constructor?.name === 'EnvironmentSettingsObject' &&
+      sameOrigin(request.window, origin)
+    ) {
+      window = request.window
+    }
+
+    // 10. If init["window"] exists and is non-null, then throw a TypeError.
+    if (init.window !== undefined && init.window != null) {
+      throw new TypeError(`'window' option '${window}' must be null`)
+    }
+
+    // 11. If init["window"] exists, then set window to "no-window".
+    if (init.window !== undefined) {
+      window = 'no-window'
+    }
+
+    // 12. Set request to a new request with the following properties:
+    request = makeRequest({
+      // URL request’s URL.
+      // undici implementation note: this is set as the first item in request's urlList in makeRequest
+      // method request’s method.
+      method: request.method,
+      // header list A copy of request’s header list.
+      // undici implementation note: headersList is cloned in makeRequest
+      headersList: request.headersList,
+      // unsafe-request flag Set.
+      unsafeRequest: request.unsafeRequest,
+      // client This’s relevant settings object.
+      client: this[kRealm].settingsObject,
+      // window window.
+      window,
+      // priority request’s priority.
+      priority: request.priority,
+      // origin request’s origin. The propagation of the origin is only significant for navigation requests
+      // being handled by a service worker. In this scenario a request can have an origin that is different
+      // from the current client.
+      origin: request.origin,
+      // referrer request’s referrer.
+      referrer: request.referrer,
+      // referrer policy request’s referrer policy.
+      referrerPolicy: request.referrerPolicy,
+      // mode request’s mode.
+      mode: request.mode,
+      // credentials mode request’s credentials mode.
+      credentials: request.credentials,
+      // cache mode request’s cache mode.
+      cache: request.cache,
+      // redirect mode request’s redirect mode.
+      redirect: request.redirect,
+      // integrity metadata request’s integrity metadata.
+      integrity: request.integrity,
+      // keepalive request’s keepalive.
+      keepalive: request.keepalive,
+      // reload-navigation flag request’s reload-navigation flag.
+      reloadNavigation: request.reloadNavigation,
+      // history-navigation flag request’s history-navigation flag.
+      historyNavigation: request.historyNavigation,
+      // URL list A clone of request’s URL list.
+      urlList: [...request.urlList]
+    })
+
+    // 13. If init is not empty, then:
+    if (Object.keys(init).length > 0) {
+      // 1. If request’s mode is "navigate", then set it to "same-origin".
+      if (request.mode === 'navigate') {
+        request.mode = 'same-origin'
+      }
+
+      // 2. Unset request’s reload-navigation flag.
+      request.reloadNavigation = false
+
+      // 3. Unset request’s history-navigation flag.
+      request.historyNavigation = false
+
+      // 4. Set request’s origin to "client".
+      request.origin = 'client'
+
+      // 5. Set request’s referrer to "client"
+      request.referrer = 'client'
+
+      // 6. Set request’s referrer policy to the empty string.
+      request.referrerPolicy = ''
+
+      // 7. Set request’s URL to request’s current URL.
+      request.url = request.urlList[request.urlList.length - 1]
+
+      // 8. Set request’s URL list to « request’s URL ».
+      request.urlList = [request.url]
+    }
+
+    // 14. If init["referrer"] exists, then:
+    if (init.referrer !== undefined) {
+      // 1. Let referrer be init["referrer"].
+      const referrer = init.referrer
+
+      // 2. If referrer is the empty string, then set request’s referrer to "no-referrer".
+      if (referrer === '') {
+        request.referrer = 'no-referrer'
+      } else {
+        // 1. Let parsedReferrer be the result of parsing referrer with
+        // baseURL.
+        // 2. If parsedReferrer is failure, then throw a TypeError.
+        let parsedReferrer
+        try {
+          parsedReferrer = new URL(referrer, baseUrl)
+        } catch (err) {
+          throw new TypeError(`Referrer "${referrer}" is not a valid URL.`, { cause: err })
+        }
+
+        // 3. If one of the following is true
+        // parsedReferrer’s cannot-be-a-base-URL is true, scheme is "about",
+        // and path contains a single string "client"
+        // parsedReferrer’s origin is not same origin with origin
+        // then set request’s referrer to "client".
+        // TODO
+
+        // 4. Otherwise, set request’s referrer to parsedReferrer.
+        request.referrer = parsedReferrer
+      }
+    }
+
+    // 15. If init["referrerPolicy"] exists, then set request’s referrer policy
+    // to it.
+    if (init.referrerPolicy !== undefined) {
+      request.referrerPolicy = init.referrerPolicy
+      if (!referrerPolicy.includes(request.referrerPolicy)) {
+        throw new TypeError(
+          `Failed to construct 'Request': The provided value '${request.referrerPolicy}' is not a valid enum value of type ReferrerPolicy.`
+        )
+      }
+    }
+
+    // 16. Let mode be init["mode"] if it exists, and fallbackMode otherwise.
+    let mode
+    if (init.mode !== undefined) {
+      mode = init.mode
+      if (!requestMode.includes(mode)) {
+        throw new TypeError(
+          `Failed to construct 'Request': The provided value '${request.mode}' is not a valid enum value of type RequestMode.`
+        )
+      }
+    } else {
+      mode = fallbackMode
+    }
+
+    // 17. If mode is "navigate", then throw a TypeError.
+    if (mode === 'navigate') {
+      webidl.errors.exception({
+        header: 'Request constructor',
+        message: 'invalid request mode navigate.'
+      })
+    }
+
+    // 18. If mode is non-null, set request’s mode to mode.
+    if (mode != null) {
+      request.mode = mode
+    }
+
+    // 19. If init["credentials"] exists, then set request’s credentials mode
+    // to it.
+    if (init.credentials !== undefined) {
+      request.credentials = init.credentials
+      if (!requestCredentials.includes(request.credentials)) {
+        throw new TypeError(
+          `Failed to construct 'Request': The provided value '${request.credentials}' is not a valid enum value of type RequestCredentials.`
+        )
+      }
+    }
+
+    // 18. If init["cache"] exists, then set request’s cache mode to it.
+    if (init.cache !== undefined) {
+      request.cache = init.cache
+      if (!requestCache.includes(request.cache)) {
+        throw new TypeError(
+          `Failed to construct 'Request': The provided value '${request.cache}' is not a valid enum value of type RequestCache.`
+        )
+      }
+    }
+
+    // 21. If request’s cache mode is "only-if-cached" and request’s mode is
+    // not "same-origin", then throw a TypeError.
+    if (request.cache === 'only-if-cached' && request.mode !== 'same-origin') {
+      throw new TypeError(
+        "'only-if-cached' can be set only with 'same-origin' mode"
+      )
+    }
+
+    // 22. If init["redirect"] exists, then set request’s redirect mode to it.
+    if (init.redirect !== undefined) {
+      request.redirect = init.redirect
+      if (!requestRedirect.includes(request.redirect)) {
+        throw new TypeError(
+          `Failed to construct 'Request': The provided value '${request.redirect}' is not a valid enum value of type RequestRedirect.`
+        )
+      }
+    }
+
+    // 23. If init["integrity"] exists, then set request’s integrity metadata to it.
+    if (init.integrity !== undefined && init.integrity != null) {
+      request.integrity = String(init.integrity)
+    }
+
+    // 24. If init["keepalive"] exists, then set request’s keepalive to it.
+    if (init.keepalive !== undefined) {
+      request.keepalive = Boolean(init.keepalive)
+    }
+
+    // 25. If init["method"] exists, then:
+    if (init.method !== undefined) {
+      // 1. Let method be init["method"].
+      let method = init.method
+
+      // 2. If method is not a method or method is a forbidden method, then
+      // throw a TypeError.
+      if (!isValidHTTPToken(init.method)) {
+        throw TypeError(`'${init.method}' is not a valid HTTP method.`)
+      }
+
+      if (forbiddenMethods.indexOf(method.toUpperCase()) !== -1) {
+        throw TypeError(`'${init.method}' HTTP method is unsupported.`)
+      }
+
+      // 3. Normalize method.
+      method = normalizeMethod(init.method)
+
+      // 4. Set request’s method to method.
+      request.method = method
+    }
+
+    // 26. If init["signal"] exists, then set signal to it.
+    if (init.signal !== undefined) {
+      signal = init.signal
+    }
+
+    // 27. Set this’s request to request.
+    this[kState] = request
+
+    // 28. Set this’s signal to a new AbortSignal object with this’s relevant
+    // Realm.
+    const ac = new AbortController()
+    this[kSignal] = ac.signal
+    this[kSignal][kRealm] = this[kRealm]
+
+    // 29. If signal is not null, then make this’s signal follow signal.
+    if (signal != null) {
+      if (
+        !signal ||
+        typeof signal.aborted !== 'boolean' ||
+        typeof signal.addEventListener !== 'function'
+      ) {
+        throw new TypeError(
+          "Failed to construct 'Request': member signal is not of type AbortSignal."
+        )
+      }
+
+      if (signal.aborted) {
+        ac.abort()
+      } else {
+        const abort = () => ac.abort()
+        signal.addEventListener('abort', abort, { once: true })
+        requestFinalizer.register(this, { signal, abort })
+      }
+    }
+
+    // 30. Set this’s headers to a new Headers object with this’s relevant
+    // Realm, whose header list is request’s header list and guard is
+    // "request".
+    this[kHeaders] = new Headers()
+    this[kHeaders][kHeadersList] = request.headersList
+    this[kHeaders][kGuard] = 'request'
+    this[kHeaders][kRealm] = this[kRealm]
+
+    // 31. If this’s request’s mode is "no-cors", then:
+    if (mode === 'no-cors') {
+      // 1. If this’s request’s method is not a CORS-safelisted method,
+      // then throw a TypeError.
+      if (!corsSafeListedMethods.includes(request.method)) {
+        throw new TypeError(
+          `'${request.method} is unsupported in no-cors mode.`
+        )
+      }
+
+      // 2. Set this’s headers’s guard to "request-no-cors".
+      this[kHeaders][kGuard] = 'request-no-cors'
+    }
+
+    // 32. If init is not empty, then:
+    if (Object.keys(init).length !== 0) {
+      // 1. Let headers be a copy of this’s headers and its associated header
+      // list.
+      let headers = new Headers(this[kHeaders])
+
+      // 2. If init["headers"] exists, then set headers to init["headers"].
+      if (init.headers !== undefined) {
+        headers = init.headers
+      }
+
+      // 3. Empty this’s headers’s header list.
+      this[kHeaders][kHeadersList].clear()
+
+      // 4. If headers is a Headers object, then for each header in its header
+      // list, append header’s name/header’s value to this’s headers.
+      if (headers.constructor.name === 'Headers') {
+        for (const [key, val] of headers) {
+          this[kHeaders].append(key, val)
+        }
+      } else {
+        // 5. Otherwise, fill this’s headers with headers.
+        fillHeaders(this[kHeaders], headers)
+      }
+    }
+
+    // 33. Let inputBody be input’s request’s body if input is a Request
+    // object; otherwise null.
+    const inputBody = input instanceof Request ? input[kState].body : null
+
+    // 34. If either init["body"] exists and is non-null or inputBody is
+    // non-null, and request’s method is `GET` or `HEAD`, then throw a
+    // TypeError.
+    if (
+      ((init.body !== undefined && init.body != null) || inputBody != null) &&
+      (request.method === 'GET' || request.method === 'HEAD')
+    ) {
+      throw new TypeError('Request with GET/HEAD method cannot have body.')
+    }
+
+    // 35. Let initBody be null.
+    let initBody = null
+
+    // 36. If init["body"] exists and is non-null, then:
+    if (init.body !== undefined && init.body != null) {
+      // 1. Let Content-Type be null.
+      // 2. Set initBody and Content-Type to the result of extracting
+      // init["body"], with keepalive set to request’s keepalive.
+      const [extractedBody, contentType] = extractBody(
+        init.body,
+        request.keepalive
+      )
+      initBody = extractedBody
+
+      // 3, If Content-Type is non-null and this’s headers’s header list does
+      // not contain `Content-Type`, then append `Content-Type`/Content-Type to
+      // this’s headers.
+      if (contentType && !this[kHeaders].has('content-type')) {
+        this[kHeaders].append('content-type', contentType)
+      }
+    }
+
+    // 37. Let inputOrInitBody be initBody if it is non-null; otherwise
+    // inputBody.
+    const inputOrInitBody = initBody ?? inputBody
+
+    // 38. If inputOrInitBody is non-null and inputOrInitBody’s source is
+    // null, then:
+    if (inputOrInitBody != null && inputOrInitBody.source == null) {
+      // 1. If this’s request’s mode is neither "same-origin" nor "cors",
+      // then throw a TypeError.
+      if (request.mode !== 'same-origin' && request.mode !== 'cors') {
+        throw new TypeError(
+          'If request is made from ReadableStream, mode should be "same-origin" or "cors"'
+        )
+      }
+
+      // 2. Set this’s request’s use-CORS-preflight flag.
+      request.useCORSPreflightFlag = true
+    }
+
+    // 39. Let finalBody be inputOrInitBody.
+    let finalBody = inputOrInitBody
+
+    // 40. If initBody is null and inputBody is non-null, then:
+    if (initBody == null && inputBody != null) {
+      // 1. If input is unusable, then throw a TypeError.
+      if (util.isDisturbed(inputBody.stream) || inputBody.stream.locked) {
+        throw new TypeError(
+          'Cannot construct a Request with a Request object that has already been used.'
+        )
+      }
+
+      // 2. Set finalBody to the result of creating a proxy for inputBody.
+      if (!TransformStream) {
+        TransformStream = require('stream/web').TransformStream
+      }
+
+      // https://streams.spec.whatwg.org/#readablestream-create-a-proxy
+      const identityTransform = new TransformStream()
+      inputBody.stream.pipeThrough(identityTransform)
+      finalBody = {
+        source: inputBody.source,
+        length: inputBody.length,
+        stream: identityTransform.readable
+      }
+    }
+
+    // 41. Set this’s request’s body to finalBody.
+    this[kState].body = finalBody
+  }
+
+  get [Symbol.toStringTag] () {
+    return this.constructor.name
+  }
+
+  // Returns request’s HTTP method, which is "GET" by default.
+  get method () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The method getter steps are to return this’s request’s method.
+    return this[kState].method
+  }
+
+  // Returns the URL of request as a string.
+  get url () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The url getter steps are to return this’s request’s URL, serialized.
+    return this[kState].url.toString()
+  }
+
+  // Returns a Headers object consisting of the headers associated with request.
+  // Note that headers added in the network layer by the user agent will not
+  // be accounted for in this object, e.g., the "Host" header.
+  get headers () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The headers getter steps are to return this’s headers.
+    return this[kHeaders]
+  }
+
+  // Returns the kind of resource requested by request, e.g., "document"
+  // or "script".
+  get destination () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The destination getter are to return this’s request’s destination.
+    return this[kState].destination
+  }
+
+  // Returns the referrer of request. Its value can be a same-origin URL if
+  // explicitly set in init, the empty string to indicate no referrer, and
+  // "about:client" when defaulting to the global’s default. This is used
+  // during fetching to determine the value of the `Referer` header of the
+  // request being made.
+  get referrer () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // 1. If this’s request’s referrer is "no-referrer", then return the
+    // empty string.
+    if (this[kState].referrer === 'no-referrer') {
+      return ''
+    }
+
+    // 2. If this’s request’s referrer is "client", then return
+    // "about:client".
+    if (this[kState].referrer === 'client') {
+      return 'about:client'
+    }
+
+    // Return this’s request’s referrer, serialized.
+    return this[kState].referrer.toString()
+  }
+
+  // Returns the referrer policy associated with request.
+  // This is used during fetching to compute the value of the request’s
+  // referrer.
+  get referrerPolicy () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The referrerPolicy getter steps are to return this’s request’s referrer policy.
+    return this[kState].referrerPolicy
+  }
+
+  // Returns the mode associated with request, which is a string indicating
+  // whether the request will use CORS, or will be restricted to same-origin
+  // URLs.
+  get mode () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The mode getter steps are to return this’s request’s mode.
+    return this[kState].mode
+  }
+
+  // Returns the credentials mode associated with request,
+  // which is a string indicating whether credentials will be sent with the
+  // request always, never, or only when sent to a same-origin URL.
+  get credentials () {
+    // The credentials getter steps are to return this’s request’s credentials mode.
+    return this[kState].credentials
+  }
+
+  // Returns the cache mode associated with request,
+  // which is a string indicating how the request will
+  // interact with the browser’s cache when fetching.
+  get cache () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The cache getter steps are to return this’s request’s cache mode.
+    return this[kState].cache
+  }
+
+  // Returns the redirect mode associated with request,
+  // which is a string indicating how redirects for the
+  // request will be handled during fetching. A request
+  // will follow redirects by default.
+  get redirect () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The redirect getter steps are to return this’s request’s redirect mode.
+    return this[kState].redirect
+  }
+
+  // Returns request’s subresource integrity metadata, which is a
+  // cryptographic hash of the resource being fetched. Its value
+  // consists of multiple hashes separated by whitespace. [SRI]
+  get integrity () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The integrity getter steps are to return this’s request’s integrity
+    // metadata.
+    return this[kState].integrity
+  }
+
+  // Returns a boolean indicating whether or not request can outlive the
+  // global in which it was created.
+  get keepalive () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The keepalive getter steps are to return this’s request’s keepalive.
+    return this[kState].keepalive
+  }
+
+  // Returns a boolean indicating whether or not request is for a reload
+  // navigation.
+  get isReloadNavigation () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The isReloadNavigation getter steps are to return true if this’s
+    // request’s reload-navigation flag is set; otherwise false.
+    return this[kState].reloadNavigation
+  }
+
+  // Returns a boolean indicating whether or not request is for a history
+  // navigation (a.k.a. back-foward navigation).
+  get isHistoryNavigation () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The isHistoryNavigation getter steps are to return true if this’s request’s
+    // history-navigation flag is set; otherwise false.
+    return this[kState].historyNavigation
+  }
+
+  // Returns the signal associated with request, which is an AbortSignal
+  // object indicating whether or not request has been aborted, and its
+  // abort event handler.
+  get signal () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The signal getter steps are to return this’s signal.
+    return this[kSignal]
+  }
+
+  // Returns a clone of request.
+  clone () {
+    if (!(this instanceof Request)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // 1. If this is unusable, then throw a TypeError.
+    if (this.bodyUsed || this.body?.locked) {
+      throw new TypeError('unusable')
+    }
+
+    // 2. Let clonedRequest be the result of cloning this’s request.
+    const clonedRequest = cloneRequest(this[kState])
+
+    // 3. Let clonedRequestObject be the result of creating a Request object,
+    // given clonedRequest, this’s headers’s guard, and this’s relevant Realm.
+    const clonedRequestObject = new Request(kInit)
+    clonedRequestObject[kState] = clonedRequest
+    clonedRequestObject[kRealm] = this[kRealm]
+    clonedRequestObject[kHeaders] = new Headers()
+    clonedRequestObject[kHeaders][kHeadersList] = clonedRequest.headersList
+    clonedRequestObject[kHeaders][kGuard] = this[kHeaders][kGuard]
+    clonedRequestObject[kHeaders][kRealm] = this[kHeaders][kRealm]
+
+    // 4. Make clonedRequestObject’s signal follow this’s signal.
+    const ac = new AbortController()
+    if (this.signal.aborted) {
+      ac.abort()
+    } else {
+      this.signal.addEventListener(
+        'abort',
+        function () {
+          ac.abort()
+        },
+        { once: true }
+      )
+    }
+    clonedRequestObject[kSignal] = ac.signal
+
+    // 4. Return clonedRequestObject.
+    return clonedRequestObject
+  }
+}
+
+mixinBody(Request)
+
+function makeRequest (init) {
+  // https://fetch.spec.whatwg.org/#requests
+  const request = {
+    method: 'GET',
+    localURLsOnly: false,
+    unsafeRequest: false,
+    body: null,
+    client: null,
+    reservedClient: null,
+    replacesClientId: '',
+    window: 'client',
+    keepalive: false,
+    serviceWorkers: 'all',
+    initiator: '',
+    destination: '',
+    priority: null,
+    origin: 'client',
+    policyContainer: 'client',
+    referrer: 'client',
+    referrerPolicy: '',
+    mode: 'no-cors',
+    useCORSPreflightFlag: false,
+    credentials: 'same-origin',
+    useCredentials: false,
+    cache: 'default',
+    redirect: 'follow',
+    integrity: '',
+    cryptoGraphicsNonceMetadata: '',
+    parserMetadata: '',
+    reloadNavigation: false,
+    historyNavigation: false,
+    userActivation: false,
+    taintedOrigin: false,
+    redirectCount: 0,
+    responseTainting: 'basic',
+    preventNoCacheCacheControlHeaderModification: false,
+    done: false,
+    timingAllowFailed: false,
+    ...init,
+    headersList: init.headersList
+      ? new HeadersList(init.headersList)
+      : new HeadersList()
+  }
+  request.url = request.urlList[0]
+  return request
+}
+
+// https://fetch.spec.whatwg.org/#concept-request-clone
+function cloneRequest (request) {
+  // To clone a request request, run these steps:
+
+  // 1. Let newRequest be a copy of request, except for its body.
+  const newRequest = makeRequest({ ...request, body: null })
+
+  // 2. If request’s body is non-null, set newRequest’s body to the
+  // result of cloning request’s body.
+  if (request.body != null) {
+    newRequest.body = cloneBody(request.body)
+  }
+
+  // 3. Return newRequest.
+  return newRequest
+}
+
+Object.defineProperties(Request.prototype, {
+  method: kEnumerableProperty,
+  url: kEnumerableProperty,
+  headers: kEnumerableProperty,
+  redirect: kEnumerableProperty,
+  clone: kEnumerableProperty,
+  signal: kEnumerableProperty
+})
+
+webidl.converters.Request = webidl.interfaceConverter(
+  Request
+)
+
+// https://fetch.spec.whatwg.org/#requestinfo
+webidl.converters.RequestInfo = function (V) {
+  if (typeof V === 'string') {
+    return webidl.converters.USVString(V)
+  }
+
+  if (V instanceof Request) {
+    return webidl.converters.Request(V)
+  }
+
+  return webidl.converters.USVString(V)
+}
+
+webidl.converters.AbortSignal = webidl.interfaceConverter(
+  AbortSignal
+)
+
+// https://fetch.spec.whatwg.org/#requestinit
+webidl.converters.RequestInit = webidl.dictionaryConverter([
+  {
+    key: 'method',
+    converter: webidl.converters.ByteString
+  },
+  {
+    key: 'headers',
+    converter: webidl.converters.HeadersInit
+  },
+  {
+    key: 'body',
+    converter: webidl.nullableConverter(
+      webidl.converters.BodyInit
+    )
+  },
+  {
+    key: 'referrer',
+    converter: webidl.converters.USVString
+  },
+  {
+    key: 'referrerPolicy',
+    converter: webidl.converters.DOMString,
+    // https://w3c.github.io/webappsec-referrer-policy/#referrer-policy
+    allowedValues: [
+      '', 'no-referrer', 'no-referrer-when-downgrade',
+      'same-origin', 'origin', 'strict-origin',
+      'origin-when-cross-origin', 'strict-origin-when-cross-origin',
+      'unsafe-url'
+    ]
+  },
+  {
+    key: 'mode',
+    converter: webidl.converters.DOMString,
+    // https://fetch.spec.whatwg.org/#concept-request-mode
+    allowedValues: [
+      'same-origin', 'cors', 'no-cors', 'navigate', 'websocket'
+    ]
+  },
+  {
+    key: 'credentials',
+    converter: webidl.converters.DOMString,
+    // https://fetch.spec.whatwg.org/#requestcredentials
+    allowedValues: [
+      'omit', 'same-origin', 'include'
+    ]
+  },
+  {
+    key: 'cache',
+    converter: webidl.converters.DOMString,
+    // https://fetch.spec.whatwg.org/#requestcache
+    allowedValues: [
+      'default', 'no-store', 'reload', 'no-cache', 'force-cache',
+      'only-if-cached'
+    ]
+  },
+  {
+    key: 'redirect',
+    converter: webidl.converters.DOMString,
+    // https://fetch.spec.whatwg.org/#requestredirect
+    allowedValues: [
+      'follow', 'error', 'manual'
+    ]
+  },
+  {
+    key: 'integrity',
+    converter: webidl.converters.DOMString
+  },
+  {
+    key: 'keepalive',
+    converter: webidl.converters.boolean
+  },
+  {
+    key: 'signal',
+    converter: webidl.nullableConverter(
+      webidl.converters.AbortSignal
+    )
+  },
+  {
+    key: 'window',
+    converter: webidl.converters.any
+  }
+])
+
+module.exports = { Request, makeRequest }

node_modules/undici/lib/fetch/response.js

@@ -0,0 +1,580 @@
+'use strict'
+
+const { Headers, HeadersList, fill } = require('./headers')
+const { extractBody, cloneBody, mixinBody } = require('./body')
+const util = require('../core/util')
+const { kEnumerableProperty } = util
+const {
+  responseURL,
+  isValidReasonPhrase,
+  isCancelled,
+  isAborted,
+  isBlobLike,
+  serializeJavascriptValueToJSONString
+} = require('./util')
+const {
+  redirectStatus,
+  nullBodyStatus,
+  DOMException
+} = require('./constants')
+const { kState, kHeaders, kGuard, kRealm } = require('./symbols')
+const { webidl } = require('./webidl')
+const { FormData } = require('./formdata')
+const { kHeadersList } = require('../core/symbols')
+const assert = require('assert')
+const { types } = require('util')
+
+const ReadableStream = globalThis.ReadableStream || require('stream/web').ReadableStream
+
+// https://fetch.spec.whatwg.org/#response-class
+class Response {
+  // Creates network error Response.
+  static error () {
+    // TODO
+    const relevantRealm = { settingsObject: {} }
+
+    // The static error() method steps are to return the result of creating a
+    // Response object, given a new network error, "immutable", and this’s
+    // relevant Realm.
+    const responseObject = new Response()
+    responseObject[kState] = makeNetworkError()
+    responseObject[kRealm] = relevantRealm
+    responseObject[kHeaders][kHeadersList] = responseObject[kState].headersList
+    responseObject[kHeaders][kGuard] = 'immutable'
+    responseObject[kHeaders][kRealm] = relevantRealm
+    return responseObject
+  }
+
+  // https://fetch.spec.whatwg.org/#dom-response-json
+  static json (data, init = {}) {
+    if (arguments.length === 0) {
+      throw new TypeError(
+        'Failed to execute \'json\' on \'Response\': 1 argument required, but 0 present.'
+      )
+    }
+
+    if (init !== null) {
+      init = webidl.converters.ResponseInit(init)
+    }
+
+    // 1. Let bytes the result of running serialize a JavaScript value to JSON bytes on data.
+    const bytes = new TextEncoder('utf-8').encode(
+      serializeJavascriptValueToJSONString(data)
+    )
+
+    // 2. Let body be the result of extracting bytes.
+    const body = extractBody(bytes)
+
+    // 3. Let responseObject be the result of creating a Response object, given a new response,
+    //    "response", and this’s relevant Realm.
+    const relevantRealm = { settingsObject: {} }
+    const responseObject = new Response()
+    responseObject[kRealm] = relevantRealm
+    responseObject[kHeaders][kGuard] = 'response'
+    responseObject[kHeaders][kRealm] = relevantRealm
+
+    // 4. Perform initialize a response given responseObject, init, and (body, "application/json").
+    initializeResponse(responseObject, init, { body: body[0], type: 'application/json' })
+
+    // 5. Return responseObject.
+    return responseObject
+  }
+
+  // Creates a redirect Response that redirects to url with status status.
+  static redirect (url, status = 302) {
+    const relevantRealm = { settingsObject: {} }
+
+    if (arguments.length < 1) {
+      throw new TypeError(
+        `Failed to execute 'redirect' on 'Response': 1 argument required, but only ${arguments.length} present.`
+      )
+    }
+
+    url = webidl.converters.USVString(url)
+    status = webidl.converters['unsigned short'](status)
+
+    // 1. Let parsedURL be the result of parsing url with current settings
+    // object’s API base URL.
+    // 2. If parsedURL is failure, then throw a TypeError.
+    // TODO: base-URL?
+    let parsedURL
+    try {
+      parsedURL = new URL(url)
+    } catch (err) {
+      throw Object.assign(new TypeError('Failed to parse URL from ' + url), {
+        cause: err
+      })
+    }
+
+    // 3. If status is not a redirect status, then throw a RangeError.
+    if (!redirectStatus.includes(status)) {
+      throw new RangeError('Invalid status code')
+    }
+
+    // 4. Let responseObject be the result of creating a Response object,
+    // given a new response, "immutable", and this’s relevant Realm.
+    const responseObject = new Response()
+    responseObject[kRealm] = relevantRealm
+    responseObject[kHeaders][kGuard] = 'immutable'
+    responseObject[kHeaders][kRealm] = relevantRealm
+
+    // 5. Set responseObject’s response’s status to status.
+    responseObject[kState].status = status
+
+    // 6. Let value be parsedURL, serialized and isomorphic encoded.
+    // TODO: isomorphic encoded?
+    const value = parsedURL.toString()
+
+    // 7. Append `Location`/value to responseObject’s response’s header list.
+    responseObject[kState].headersList.append('location', value)
+
+    // 8. Return responseObject.
+    return responseObject
+  }
+
+  // https://fetch.spec.whatwg.org/#dom-response
+  constructor (body = null, init = {}) {
+    if (body !== null) {
+      body = webidl.converters.BodyInit(body)
+    }
+
+    init = webidl.converters.ResponseInit(init)
+
+    // TODO
+    this[kRealm] = { settingsObject: {} }
+
+    // 1. Set this’s response to a new response.
+    this[kState] = makeResponse({})
+
+    // 2. Set this’s headers to a new Headers object with this’s relevant
+    // Realm, whose header list is this’s response’s header list and guard
+    // is "response".
+    this[kHeaders] = new Headers()
+    this[kHeaders][kGuard] = 'response'
+    this[kHeaders][kHeadersList] = this[kState].headersList
+    this[kHeaders][kRealm] = this[kRealm]
+
+    // 3. Let bodyWithType be null.
+    let bodyWithType = null
+
+    // 4. If body is non-null, then set bodyWithType to the result of extracting body.
+    if (body != null) {
+      const [extractedBody, type] = extractBody(body)
+      bodyWithType = { body: extractedBody, type }
+    }
+
+    // 5. Perform initialize a response given this, init, and bodyWithType.
+    initializeResponse(this, init, bodyWithType)
+  }
+
+  get [Symbol.toStringTag] () {
+    return this.constructor.name
+  }
+
+  // Returns response’s type, e.g., "cors".
+  get type () {
+    if (!(this instanceof Response)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The type getter steps are to return this’s response’s type.
+    return this[kState].type
+  }
+
+  // Returns response’s URL, if it has one; otherwise the empty string.
+  get url () {
+    if (!(this instanceof Response)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The url getter steps are to return the empty string if this’s
+    // response’s URL is null; otherwise this’s response’s URL,
+    // serialized with exclude fragment set to true.
+    let url = responseURL(this[kState])
+
+    if (url == null) {
+      return ''
+    }
+
+    if (url.hash) {
+      url = new URL(url)
+      url.hash = ''
+    }
+
+    return url.toString()
+  }
+
+  // Returns whether response was obtained through a redirect.
+  get redirected () {
+    if (!(this instanceof Response)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The redirected getter steps are to return true if this’s response’s URL
+    // list has more than one item; otherwise false.
+    return this[kState].urlList.length > 1
+  }
+
+  // Returns response’s status.
+  get status () {
+    if (!(this instanceof Response)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The status getter steps are to return this’s response’s status.
+    return this[kState].status
+  }
+
+  // Returns whether response’s status is an ok status.
+  get ok () {
+    if (!(this instanceof Response)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The ok getter steps are to return true if this’s response’s status is an
+    // ok status; otherwise false.
+    return this[kState].status >= 200 && this[kState].status <= 299
+  }
+
+  // Returns response’s status message.
+  get statusText () {
+    if (!(this instanceof Response)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The statusText getter steps are to return this’s response’s status
+    // message.
+    return this[kState].statusText
+  }
+
+  // Returns response’s headers as Headers.
+  get headers () {
+    if (!(this instanceof Response)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // The headers getter steps are to return this’s headers.
+    return this[kHeaders]
+  }
+
+  // Returns a clone of response.
+  clone () {
+    if (!(this instanceof Response)) {
+      throw new TypeError('Illegal invocation')
+    }
+
+    // 1. If this is unusable, then throw a TypeError.
+    if (this.bodyUsed || (this.body && this.body.locked)) {
+      webidl.errors.exception({
+        header: 'Response.clone',
+        message: 'Body has already been consumed.'
+      })
+    }
+
+    // 2. Let clonedResponse be the result of cloning this’s response.
+    const clonedResponse = cloneResponse(this[kState])
+
+    // 3. Return the result of creating a Response object, given
+    // clonedResponse, this’s headers’s guard, and this’s relevant Realm.
+    const clonedResponseObject = new Response()
+    clonedResponseObject[kState] = clonedResponse
+    clonedResponseObject[kRealm] = this[kRealm]
+    clonedResponseObject[kHeaders][kHeadersList] = clonedResponse.headersList
+    clonedResponseObject[kHeaders][kGuard] = this[kHeaders][kGuard]
+    clonedResponseObject[kHeaders][kRealm] = this[kHeaders][kRealm]
+
+    return clonedResponseObject
+  }
+}
+
+mixinBody(Response)
+
+Object.defineProperties(Response.prototype, {
+  type: kEnumerableProperty,
+  url: kEnumerableProperty,
+  status: kEnumerableProperty,
+  ok: kEnumerableProperty,
+  redirected: kEnumerableProperty,
+  statusText: kEnumerableProperty,
+  headers: kEnumerableProperty,
+  clone: kEnumerableProperty
+})
+
+// https://fetch.spec.whatwg.org/#concept-response-clone
+function cloneResponse (response) {
+  // To clone a response response, run these steps:
+
+  // 1. If response is a filtered response, then return a new identical
+  // filtered response whose internal response is a clone of response’s
+  // internal response.
+  if (response.internalResponse) {
+    return filterResponse(
+      cloneResponse(response.internalResponse),
+      response.type
+    )
+  }
+
+  // 2. Let newResponse be a copy of response, except for its body.
+  const newResponse = makeResponse({ ...response, body: null })
+
+  // 3. If response’s body is non-null, then set newResponse’s body to the
+  // result of cloning response’s body.
+  if (response.body != null) {
+    newResponse.body = cloneBody(response.body)
+  }
+
+  // 4. Return newResponse.
+  return newResponse
+}
+
+function makeResponse (init) {
+  return {
+    aborted: false,
+    rangeRequested: false,
+    timingAllowPassed: false,
+    requestIncludesCredentials: false,
+    type: 'default',
+    status: 200,
+    timingInfo: null,
+    cacheState: '',
+    statusText: '',
+    ...init,
+    headersList: init.headersList
+      ? new HeadersList(init.headersList)
+      : new HeadersList(),
+    urlList: init.urlList ? [...init.urlList] : []
+  }
+}
+
+function makeNetworkError (reason) {
+  return makeResponse({
+    type: 'error',
+    status: 0,
+    error:
+      reason instanceof Error
+        ? reason
+        : new Error(reason ? String(reason) : reason, {
+          cause: reason instanceof Error ? reason : undefined
+        }),
+    aborted: reason && reason.name === 'AbortError'
+  })
+}
+
+function makeFilteredResponse (response, state) {
+  state = {
+    internalResponse: response,
+    ...state
+  }
+
+  return new Proxy(response, {
+    get (target, p) {
+      return p in state ? state[p] : target[p]
+    },
+    set (target, p, value) {
+      assert(!(p in state))
+      target[p] = value
+      return true
+    }
+  })
+}
+
+// https://fetch.spec.whatwg.org/#concept-filtered-response
+function filterResponse (response, type) {
+  // Set response to the following filtered response with response as its
+  // internal response, depending on request’s response tainting:
+  if (type === 'basic') {
+    // A basic filtered response is a filtered response whose type is "basic"
+    // and header list excludes any headers in internal response’s header list
+    // whose name is a forbidden response-header name.
+
+    // Note: undici does not implement forbidden response-header names
+    return makeFilteredResponse(response, {
+      type: 'basic',
+      headersList: response.headersList
+    })
+  } else if (type === 'cors') {
+    // A CORS filtered response is a filtered response whose type is "cors"
+    // and header list excludes any headers in internal response’s header
+    // list whose name is not a CORS-safelisted response-header name, given
+    // internal response’s CORS-exposed header-name list.
+
+    // Note: undici does not implement CORS-safelisted response-header names
+    return makeFilteredResponse(response, {
+      type: 'cors',
+      headersList: response.headersList
+    })
+  } else if (type === 'opaque') {
+    // An opaque filtered response is a filtered response whose type is
+    // "opaque", URL list is the empty list, status is 0, status message
+    // is the empty byte sequence, header list is empty, and body is null.
+
+    return makeFilteredResponse(response, {
+      type: 'opaque',
+      urlList: Object.freeze([]),
+      status: 0,
+      statusText: '',
+      body: null
+    })
+  } else if (type === 'opaqueredirect') {
+    // An opaque-redirect filtered response is a filtered response whose type
+    // is "opaqueredirect", status is 0, status message is the empty byte
+    // sequence, header list is empty, and body is null.
+
+    return makeFilteredResponse(response, {
+      type: 'opaqueredirect',
+      status: 0,
+      statusText: '',
+      headersList: [],
+      body: null
+    })
+  } else {
+    assert(false)
+  }
+}
+
+// https://fetch.spec.whatwg.org/#appropriate-network-error
+function makeAppropriateNetworkError (fetchParams) {
+  // 1. Assert: fetchParams is canceled.
+  assert(isCancelled(fetchParams))
+
+  // 2. Return an aborted network error if fetchParams is aborted;
+  // otherwise return a network error.
+  return isAborted(fetchParams)
+    ? makeNetworkError(new DOMException('The operation was aborted.', 'AbortError'))
+    : makeNetworkError(fetchParams.controller.terminated.reason)
+}
+
+// https://whatpr.org/fetch/1392.html#initialize-a-response
+function initializeResponse (response, init, body) {
+  // 1. If init["status"] is not in the range 200 to 599, inclusive, then
+  //    throw a RangeError.
+  if (init.status !== null && (init.status < 200 || init.status > 599)) {
+    throw new RangeError('init["status"] must be in the range of 200 to 599, inclusive.')
+  }
+
+  // 2. If init["statusText"] does not match the reason-phrase token production,
+  //    then throw a TypeError.
+  if ('statusText' in init && init.statusText != null) {
+    // See, https://datatracker.ietf.org/doc/html/rfc7230#section-3.1.2:
+    //   reason-phrase  = *( HTAB / SP / VCHAR / obs-text )
+    if (!isValidReasonPhrase(String(init.statusText))) {
+      throw new TypeError('Invalid statusText')
+    }
+  }
+
+  // 3. Set response’s response’s status to init["status"].
+  if ('status' in init && init.status != null) {
+    response[kState].status = init.status
+  }
+
+  // 4. Set response’s response’s status message to init["statusText"].
+  if ('statusText' in init && init.statusText != null) {
+    response[kState].statusText = init.statusText
+  }
+
+  // 5. If init["headers"] exists, then fill response’s headers with init["headers"].
+  if ('headers' in init && init.headers != null) {
+    fill(response[kState].headersList, init.headers)
+  }
+
+  // 6. If body was given, then:
+  if (body) {
+    // 1. If response's status is a null body status, then throw a TypeError.
+    if (nullBodyStatus.includes(response.status)) {
+      webidl.errors.exception({
+        header: 'Response constructor',
+        message: 'Invalid response status code.'
+      })
+    }
+
+    // 2. Set response's body to body's body.
+    response[kState].body = body.body
+
+    // 3. If body's type is non-null and response's header list does not contain
+    //    `Content-Type`, then append (`Content-Type`, body's type) to response's header list.
+    if (body.type != null && !response[kState].headersList.has('Content-Type')) {
+      response[kState].headersList.append('content-type', body.type)
+    }
+  }
+}
+
+webidl.converters.ReadableStream = webidl.interfaceConverter(
+  ReadableStream
+)
+
+webidl.converters.FormData = webidl.interfaceConverter(
+  FormData
+)
+
+webidl.converters.URLSearchParams = webidl.interfaceConverter(
+  URLSearchParams
+)
+
+// https://fetch.spec.whatwg.org/#typedefdef-xmlhttprequestbodyinit
+webidl.converters.XMLHttpRequestBodyInit = function (V) {
+  if (typeof V === 'string') {
+    return webidl.converters.USVString(V)
+  }
+
+  if (isBlobLike(V)) {
+    return webidl.converters.Blob(V)
+  }
+
+  if (
+    types.isAnyArrayBuffer(V) ||
+    types.isTypedArray(V) ||
+    types.isDataView(V)
+  ) {
+    return webidl.converters.BufferSource(V)
+  }
+
+  if (V instanceof FormData) {
+    return webidl.converters.FormData(V)
+  }
+
+  if (V instanceof URLSearchParams) {
+    return webidl.converters.URLSearchParams(V)
+  }
+
+  return webidl.converters.DOMString(V)
+}
+
+// https://fetch.spec.whatwg.org/#bodyinit
+webidl.converters.BodyInit = function (V) {
+  if (V instanceof ReadableStream) {
+    return webidl.converters.ReadableStream(V)
+  }
+
+  // Note: the spec doesn't include async iterables,
+  // this is an undici extension.
+  if (V?.[Symbol.asyncIterator]) {
+    return V
+  }
+
+  return webidl.converters.XMLHttpRequestBodyInit(V)
+}
+
+webidl.converters.ResponseInit = webidl.dictionaryConverter([
+  {
+    key: 'status',
+    converter: webidl.converters['unsigned short'],
+    defaultValue: 200
+  },
+  {
+    key: 'statusText',
+    converter: webidl.converters.ByteString,
+    defaultValue: ''
+  },
+  {
+    key: 'headers',
+    converter: webidl.converters.HeadersInit
+  }
+])
+
+module.exports = {
+  makeNetworkError,
+  makeResponse,
+  makeAppropriateNetworkError,
+  filterResponse,
+  Response
+}

node_modules/undici/lib/fetch/symbols.js

@@ -0,0 +1,10 @@
+'use strict'
+
+module.exports = {
+  kUrl: Symbol('url'),
+  kHeaders: Symbol('headers'),
+  kSignal: Symbol('signal'),
+  kState: Symbol('state'),
+  kGuard: Symbol('guard'),
+  kRealm: Symbol('realm')
+}

node_modules/undici/lib/fetch/util.js

@@ -0,0 +1,467 @@
+'use strict'
+
+const { redirectStatus } = require('./constants')
+const { performance } = require('perf_hooks')
+const { isBlobLike, toUSVString, ReadableStreamFrom } = require('../core/util')
+const assert = require('assert')
+
+let File
+
+// https://fetch.spec.whatwg.org/#block-bad-port
+const badPorts = [
+  '1', '7', '9', '11', '13', '15', '17', '19', '20', '21', '22', '23', '25', '37', '42', '43', '53', '69', '77', '79',
+  '87', '95', '101', '102', '103', '104', '109', '110', '111', '113', '115', '117', '119', '123', '135', '137',
+  '139', '143', '161', '179', '389', '427', '465', '512', '513', '514', '515', '526', '530', '531', '532',
+  '540', '548', '554', '556', '563', '587', '601', '636', '989', '990', '993', '995', '1719', '1720', '1723',
+  '2049', '3659', '4045', '5060', '5061', '6000', '6566', '6665', '6666', '6667', '6668', '6669', '6697',
+  '10080'
+]
+
+function responseURL (response) {
+  // https://fetch.spec.whatwg.org/#responses
+  // A response has an associated URL. It is a pointer to the last URL
+  // in response’s URL list and null if response’s URL list is empty.
+  const urlList = response.urlList
+  const length = urlList.length
+  return length === 0 ? null : urlList[length - 1].toString()
+}
+
+// https://fetch.spec.whatwg.org/#concept-response-location-url
+function responseLocationURL (response, requestFragment) {
+  // 1. If response’s status is not a redirect status, then return null.
+  if (!redirectStatus.includes(response.status)) {
+    return null
+  }
+
+  // 2. Let location be the result of extracting header list values given
+  // `Location` and response’s header list.
+  let location = response.headersList.get('location')
+
+  // 3. If location is a value, then set location to the result of parsing
+  // location with response’s URL.
+  location = location ? new URL(location, responseURL(response)) : null
+
+  // 4. If location is a URL whose fragment is null, then set location’s
+  // fragment to requestFragment.
+  if (location && !location.hash) {
+    location.hash = requestFragment
+  }
+
+  // 5. Return location.
+  return location
+}
+
+/** @returns {URL} */
+function requestCurrentURL (request) {
+  return request.urlList[request.urlList.length - 1]
+}
+
+function requestBadPort (request) {
+  // 1. Let url be request’s current URL.
+  const url = requestCurrentURL(request)
+
+  // 2. If url’s scheme is an HTTP(S) scheme and url’s port is a bad port,
+  // then return blocked.
+  if (/^https?:/.test(url.protocol) && badPorts.includes(url.port)) {
+    return 'blocked'
+  }
+
+  // 3. Return allowed.
+  return 'allowed'
+}
+
+function isFileLike (object) {
+  if (!File) {
+    File = require('./file').File
+  }
+  return object instanceof File || (
+    object &&
+    (typeof object.stream === 'function' ||
+     typeof object.arrayBuffer === 'function') &&
+    /^(File)$/.test(object[Symbol.toStringTag])
+  )
+}
+
+// Check whether |statusText| is a ByteString and
+// matches the Reason-Phrase token production.
+// RFC 2616: https://tools.ietf.org/html/rfc2616
+// RFC 7230: https://tools.ietf.org/html/rfc7230
+// "reason-phrase = *( HTAB / SP / VCHAR / obs-text )"
+// https://github.com/chromium/chromium/blob/94.0.4604.1/third_party/blink/renderer/core/fetch/response.cc#L116
+function isValidReasonPhrase (statusText) {
+  for (let i = 0; i < statusText.length; ++i) {
+    const c = statusText.charCodeAt(i)
+    if (
+      !(
+        (
+          c === 0x09 || // HTAB
+          (c >= 0x20 && c <= 0x7e) || // SP / VCHAR
+          (c >= 0x80 && c <= 0xff)
+        ) // obs-text
+      )
+    ) {
+      return false
+    }
+  }
+  return true
+}
+
+function isTokenChar (c) {
+  return !(
+    c >= 0x7f ||
+    c <= 0x20 ||
+    c === '(' ||
+    c === ')' ||
+    c === '<' ||
+    c === '>' ||
+    c === '@' ||
+    c === ',' ||
+    c === ';' ||
+    c === ':' ||
+    c === '\\' ||
+    c === '"' ||
+    c === '/' ||
+    c === '[' ||
+    c === ']' ||
+    c === '?' ||
+    c === '=' ||
+    c === '{' ||
+    c === '}'
+  )
+}
+
+// See RFC 7230, Section 3.2.6.
+// https://github.com/chromium/chromium/blob/d7da0240cae77824d1eda25745c4022757499131/third_party/blink/renderer/platform/network/http_parsers.cc#L321
+function isValidHTTPToken (characters) {
+  if (!characters || typeof characters !== 'string') {
+    return false
+  }
+  for (let i = 0; i < characters.length; ++i) {
+    const c = characters.charCodeAt(i)
+    if (c > 0x7f || !isTokenChar(c)) {
+      return false
+    }
+  }
+  return true
+}
+
+// https://fetch.spec.whatwg.org/#header-name
+// https://github.com/chromium/chromium/blob/b3d37e6f94f87d59e44662d6078f6a12de845d17/net/http/http_util.cc#L342
+function isValidHeaderName (potentialValue) {
+  if (potentialValue.length === 0) {
+    return false
+  }
+
+  for (const char of potentialValue) {
+    if (!isValidHTTPToken(char)) {
+      return false
+    }
+  }
+
+  return true
+}
+
+/**
+ * @see https://fetch.spec.whatwg.org/#header-value
+ * @param {string} potentialValue
+ */
+function isValidHeaderValue (potentialValue) {
+  // - Has no leading or trailing HTTP tab or space bytes.
+  // - Contains no 0x00 (NUL) or HTTP newline bytes.
+  if (
+    potentialValue.startsWith('\t') ||
+    potentialValue.startsWith(' ') ||
+    potentialValue.endsWith('\t') ||
+    potentialValue.endsWith(' ')
+  ) {
+    return false
+  }
+
+  if (
+    potentialValue.includes('\0') ||
+    potentialValue.includes('\r') ||
+    potentialValue.includes('\n')
+  ) {
+    return false
+  }
+
+  return true
+}
+
+// https://w3c.github.io/webappsec-referrer-policy/#set-requests-referrer-policy-on-redirect
+function setRequestReferrerPolicyOnRedirect (request, actualResponse) {
+  //  Given a request request and a response actualResponse, this algorithm
+  //  updates request’s referrer policy according to the Referrer-Policy
+  //  header (if any) in actualResponse.
+
+  // 1. Let policy be the result of executing § 8.1 Parse a referrer policy
+  // from a Referrer-Policy header on actualResponse.
+  // TODO:  https://w3c.github.io/webappsec-referrer-policy/#parse-referrer-policy-from-header
+  const policy = ''
+
+  // 2. If policy is not the empty string, then set request’s referrer policy to policy.
+  if (policy !== '') {
+    request.referrerPolicy = policy
+  }
+}
+
+// https://fetch.spec.whatwg.org/#cross-origin-resource-policy-check
+function crossOriginResourcePolicyCheck () {
+  // TODO
+  return 'allowed'
+}
+
+// https://fetch.spec.whatwg.org/#concept-cors-check
+function corsCheck () {
+  // TODO
+  return 'success'
+}
+
+// https://fetch.spec.whatwg.org/#concept-tao-check
+function TAOCheck () {
+  // TODO
+  return 'success'
+}
+
+function appendFetchMetadata (httpRequest) {
+  //  https://w3c.github.io/webappsec-fetch-metadata/#sec-fetch-dest-header
+  //  TODO
+
+  //  https://w3c.github.io/webappsec-fetch-metadata/#sec-fetch-mode-header
+
+  //  1. Assert: r’s url is a potentially trustworthy URL.
+  //  TODO
+
+  //  2. Let header be a Structured Header whose value is a token.
+  let header = null
+
+  //  3. Set header’s value to r’s mode.
+  header = httpRequest.mode
+
+  //  4. Set a structured field value `Sec-Fetch-Mode`/header in r’s header list.
+  httpRequest.headersList.set('sec-fetch-mode', header)
+
+  //  https://w3c.github.io/webappsec-fetch-metadata/#sec-fetch-site-header
+  //  TODO
+
+  //  https://w3c.github.io/webappsec-fetch-metadata/#sec-fetch-user-header
+  //  TODO
+}
+
+// https://fetch.spec.whatwg.org/#append-a-request-origin-header
+function appendRequestOriginHeader (request) {
+  // 1. Let serializedOrigin be the result of byte-serializing a request origin with request.
+  let serializedOrigin = request.origin
+
+  // 2. If request’s response tainting is "cors" or request’s mode is "websocket", then append (`Origin`, serializedOrigin) to request’s header list.
+  if (request.responseTainting === 'cors' || request.mode === 'websocket') {
+    if (serializedOrigin) {
+      request.headersList.append('Origin', serializedOrigin)
+    }
+
+  // 3. Otherwise, if request’s method is neither `GET` nor `HEAD`, then:
+  } else if (request.method !== 'GET' && request.method !== 'HEAD') {
+    // 1. Switch on request’s referrer policy:
+    switch (request.referrerPolicy) {
+      case 'no-referrer':
+        // Set serializedOrigin to `null`.
+        serializedOrigin = null
+        break
+      case 'no-referrer-when-downgrade':
+      case 'strict-origin':
+      case 'strict-origin-when-cross-origin':
+        // If request’s origin is a tuple origin, its scheme is "https", and request’s current URL’s scheme is not "https", then set serializedOrigin to `null`.
+        if (/^https:/.test(request.origin) && !/^https:/.test(requestCurrentURL(request))) {
+          serializedOrigin = null
+        }
+        break
+      case 'same-origin':
+        // If request’s origin is not same origin with request’s current URL’s origin, then set serializedOrigin to `null`.
+        if (!sameOrigin(request, requestCurrentURL(request))) {
+          serializedOrigin = null
+        }
+        break
+      default:
+        // Do nothing.
+    }
+
+    if (serializedOrigin) {
+      // 2. Append (`Origin`, serializedOrigin) to request’s header list.
+      request.headersList.append('Origin', serializedOrigin)
+    }
+  }
+}
+
+function coarsenedSharedCurrentTime (crossOriginIsolatedCapability) {
+  // TODO
+  return performance.now()
+}
+
+// https://fetch.spec.whatwg.org/#create-an-opaque-timing-info
+function createOpaqueTimingInfo (timingInfo) {
+  return {
+    startTime: timingInfo.startTime ?? 0,
+    redirectStartTime: 0,
+    redirectEndTime: 0,
+    postRedirectStartTime: timingInfo.startTime ?? 0,
+    finalServiceWorkerStartTime: 0,
+    finalNetworkResponseStartTime: 0,
+    finalNetworkRequestStartTime: 0,
+    endTime: 0,
+    encodedBodySize: 0,
+    decodedBodySize: 0,
+    finalConnectionTimingInfo: null
+  }
+}
+
+// https://html.spec.whatwg.org/multipage/origin.html#policy-container
+function makePolicyContainer () {
+  // TODO
+  return {}
+}
+
+// https://html.spec.whatwg.org/multipage/origin.html#clone-a-policy-container
+function clonePolicyContainer () {
+  // TODO
+  return {}
+}
+
+// https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer
+function determineRequestsReferrer (request) {
+  // TODO
+  return 'no-referrer'
+}
+
+function matchRequestIntegrity (request, bytes) {
+  return false
+}
+
+// https://w3c.github.io/webappsec-upgrade-insecure-requests/#upgrade-request
+function tryUpgradeRequestToAPotentiallyTrustworthyURL (request) {
+  // TODO
+}
+
+/**
+ * @link {https://html.spec.whatwg.org/multipage/origin.html#same-origin}
+ * @param {URL} A
+ * @param {URL} B
+ */
+function sameOrigin (A, B) {
+  // 1. If A and B are the same opaque origin, then return true.
+  // "opaque origin" is an internal value we cannot access, ignore.
+
+  // 2. If A and B are both tuple origins and their schemes,
+  //    hosts, and port are identical, then return true.
+  if (A.protocol === B.protocol && A.hostname === B.hostname && A.port === B.port) {
+    return true
+  }
+
+  // 3. Return false.
+  return false
+}
+
+function createDeferredPromise () {
+  let res
+  let rej
+  const promise = new Promise((resolve, reject) => {
+    res = resolve
+    rej = reject
+  })
+
+  return { promise, resolve: res, reject: rej }
+}
+
+function isAborted (fetchParams) {
+  return fetchParams.controller.state === 'aborted'
+}
+
+function isCancelled (fetchParams) {
+  return fetchParams.controller.state === 'aborted' ||
+    fetchParams.controller.state === 'terminated'
+}
+
+// https://fetch.spec.whatwg.org/#concept-method-normalize
+function normalizeMethod (method) {
+  return /^(DELETE|GET|HEAD|OPTIONS|POST|PUT)$/i.test(method)
+    ? method.toUpperCase()
+    : method
+}
+
+// https://infra.spec.whatwg.org/#serialize-a-javascript-value-to-a-json-string
+function serializeJavascriptValueToJSONString (value) {
+  // 1. Let result be ? Call(%JSON.stringify%, undefined, « value »).
+  const result = JSON.stringify(value)
+
+  // 2. If result is undefined, then throw a TypeError.
+  if (result === undefined) {
+    throw new TypeError('Value is not JSON serializable')
+  }
+
+  // 3. Assert: result is a string.
+  assert(typeof result === 'string')
+
+  // 4. Return result.
+  return result
+}
+
+// https://tc39.es/ecma262/#sec-%25iteratorprototype%25-object
+const esIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]()))
+
+// https://webidl.spec.whatwg.org/#dfn-iterator-prototype-object
+function makeIterator (iterator, name) {
+  const i = {
+    next () {
+      if (Object.getPrototypeOf(this) !== i) {
+        throw new TypeError(
+          `'next' called on an object that does not implement interface ${name} Iterator.`
+        )
+      }
+
+      return iterator.next()
+    },
+    // The class string of an iterator prototype object for a given interface is the
+    // result of concatenating the identifier of the interface and the string " Iterator".
+    [Symbol.toStringTag]: `${name} Iterator`
+  }
+
+  // The [[Prototype]] internal slot of an iterator prototype object must be %IteratorPrototype%.
+  Object.setPrototypeOf(i, esIteratorPrototype)
+  // esIteratorPrototype needs to be the prototype of i
+  // which is the prototype of an empty object. Yes, it's confusing.
+  return Object.setPrototypeOf({}, i)
+}
+
+module.exports = {
+  isAborted,
+  isCancelled,
+  createDeferredPromise,
+  ReadableStreamFrom,
+  toUSVString,
+  tryUpgradeRequestToAPotentiallyTrustworthyURL,
+  coarsenedSharedCurrentTime,
+  matchRequestIntegrity,
+  determineRequestsReferrer,
+  makePolicyContainer,
+  clonePolicyContainer,
+  appendFetchMetadata,
+  appendRequestOriginHeader,
+  TAOCheck,
+  corsCheck,
+  crossOriginResourcePolicyCheck,
+  createOpaqueTimingInfo,
+  setRequestReferrerPolicyOnRedirect,
+  isValidHTTPToken,
+  requestBadPort,
+  requestCurrentURL,
+  responseURL,
+  responseLocationURL,
+  isBlobLike,
+  isFileLike,
+  isValidReasonPhrase,
+  sameOrigin,
+  normalizeMethod,
+  serializeJavascriptValueToJSONString,
+  makeIterator,
+  isValidHeaderName,
+  isValidHeaderValue
+}

node_modules/undici/lib/fetch/webidl.js

@@ -0,0 +1,594 @@
+'use strict'
+
+const { toUSVString, types } = require('util')
+
+const webidl = {}
+webidl.converters = {}
+webidl.util = {}
+webidl.errors = {}
+
+/**
+ *
+ * @param {{
+ *   header: string
+ *   message: string
+ * }} message
+ */
+webidl.errors.exception = function (message) {
+  throw new TypeError(`${message.header}: ${message.message}`)
+}
+
+/**
+ * Throw an error when conversion from one type to another has failed
+ * @param {{
+ *   prefix: string
+ *   argument: string
+ *   types: string[]
+ * }} context
+ */
+webidl.errors.conversionFailed = function (context) {
+  const plural = context.types.length === 1 ? '' : ' one of'
+  const message =
+    `${context.argument} could not be converted to` +
+    `${plural}: ${context.types.join(', ')}.`
+
+  return webidl.errors.exception({
+    header: context.prefix,
+    message
+  })
+}
+
+/**
+ * Throw an error when an invalid argument is provided
+ * @param {{
+ *   prefix: string
+ *   value: string
+ *   type: string
+ * }} context
+ */
+webidl.errors.invalidArgument = function (context) {
+  return webidl.errors.exception({
+    header: context.prefix,
+    message: `"${context.value}" is an invalid ${context.type}.`
+  })
+}
+
+// https://tc39.es/ecma262/#sec-ecmascript-data-types-and-values
+webidl.util.Type = function (V) {
+  switch (typeof V) {
+    case 'undefined': return 'Undefined'
+    case 'boolean': return 'Boolean'
+    case 'string': return 'String'
+    case 'symbol': return 'Symbol'
+    case 'number': return 'Number'
+    case 'bigint': return 'BigInt'
+    case 'function':
+    case 'object': {
+      if (V === null) {
+        return 'Null'
+      }
+
+      return 'Object'
+    }
+  }
+}
+
+// https://webidl.spec.whatwg.org/#abstract-opdef-converttoint
+webidl.util.ConvertToInt = function (V, bitLength, signedness, opts = {}) {
+  let upperBound
+  let lowerBound
+
+  // 1. If bitLength is 64, then:
+  if (bitLength === 64) {
+    // 1. Let upperBound be 2^53 − 1.
+    upperBound = Math.pow(2, 53) - 1
+
+    // 2. If signedness is "unsigned", then let lowerBound be 0.
+    if (signedness === 'unsigned') {
+      lowerBound = 0
+    } else {
+      // 3. Otherwise let lowerBound be −2^53 + 1.
+      lowerBound = Math.pow(-2, 53) + 1
+    }
+  } else if (signedness === 'unsigned') {
+    // 2. Otherwise, if signedness is "unsigned", then:
+
+    // 1. Let lowerBound be 0.
+    lowerBound = 0
+
+    // 2. Let upperBound be 2^bitLength − 1.
+    upperBound = Math.pow(2, bitLength) - 1
+  } else {
+    // 3. Otherwise:
+
+    // 1. Let lowerBound be -2^bitLength − 1.
+    lowerBound = Math.pow(-2, bitLength) - 1
+
+    // 2. Let upperBound be 2^bitLength − 1 − 1.
+    upperBound = Math.pow(2, bitLength - 1) - 1
+  }
+
+  // 4. Let x be ? ToNumber(V).
+  let x = Number(V)
+
+  // 5. If x is −0, then set x to +0.
+  if (Object.is(-0, x)) {
+    x = 0
+  }
+
+  // 6. If the conversion is to an IDL type associated
+  //    with the [EnforceRange] extended attribute, then:
+  if (opts.enforceRange === true) {
+    // 1. If x is NaN, +∞, or −∞, then throw a TypeError.
+    if (
+      Number.isNaN(x) ||
+      x === Number.POSITIVE_INFINITY ||
+      x === Number.NEGATIVE_INFINITY
+    ) {
+      webidl.errors.exception({
+        header: 'Integer conversion',
+        message: `Could not convert ${V} to an integer.`
+      })
+    }
+
+    // 2. Set x to IntegerPart(x).
+    x = webidl.util.IntegerPart(x)
+
+    // 3. If x < lowerBound or x > upperBound, then
+    //    throw a TypeError.
+    if (x < lowerBound || x > upperBound) {
+      webidl.errors.exception({
+        header: 'Integer conversion',
+        message: `Value must be between ${lowerBound}-${upperBound}, got ${x}.`
+      })
+    }
+
+    // 4. Return x.
+    return x
+  }
+
+  // 7. If x is not NaN and the conversion is to an IDL
+  //    type associated with the [Clamp] extended
+  //    attribute, then:
+  if (!Number.isNaN(x) && opts.clamp === true) {
+    // 1. Set x to min(max(x, lowerBound), upperBound).
+    x = Math.min(Math.max(x, lowerBound), upperBound)
+
+    // 2. Round x to the nearest integer, choosing the
+    //    even integer if it lies halfway between two,
+    //    and choosing +0 rather than −0.
+    if (Math.floor(x) % 2 === 0) {
+      x = Math.floor(x)
+    } else {
+      x = Math.ceil(x)
+    }
+
+    // 3. Return x.
+    return x
+  }
+
+  // 8. If x is NaN, +0, +∞, or −∞, then return +0.
+  if (
+    Number.isNaN(x) ||
+    Object.is(0, x) ||
+    x === Number.POSITIVE_INFINITY ||
+    x === Number.NEGATIVE_INFINITY
+  ) {
+    return 0
+  }
+
+  // 9. Set x to IntegerPart(x).
+  x = webidl.util.IntegerPart(x)
+
+  // 10. Set x to x modulo 2^bitLength.
+  x = x % Math.pow(2, bitLength)
+
+  // 11. If signedness is "signed" and x ≥ 2^bitLength − 1,
+  //    then return x − 2^bitLength.
+  if (signedness === 'signed' && x >= Math.pow(2, bitLength) - 1) {
+    return x - Math.pow(2, bitLength)
+  }
+
+  // 12. Otherwise, return x.
+  return x
+}
+
+// https://webidl.spec.whatwg.org/#abstract-opdef-integerpart
+webidl.util.IntegerPart = function (n) {
+  // 1. Let r be floor(abs(n)).
+  const r = Math.floor(Math.abs(n))
+
+  // 2. If n < 0, then return -1 × r.
+  if (n < 0) {
+    return -1 * r
+  }
+
+  // 3. Otherwise, return r.
+  return r
+}
+
+// https://webidl.spec.whatwg.org/#es-sequence
+webidl.sequenceConverter = function (converter) {
+  return (V) => {
+    // 1. If Type(V) is not Object, throw a TypeError.
+    if (webidl.util.Type(V) !== 'Object') {
+      webidl.errors.exception({
+        header: 'Sequence',
+        message: `Value of type ${webidl.util.Type(V)} is not an Object.`
+      })
+    }
+
+    // 2. Let method be ? GetMethod(V, @@iterator).
+    /** @type {Generator} */
+    const method = V?.[Symbol.iterator]?.()
+    const seq = []
+
+    // 3. If method is undefined, throw a TypeError.
+    if (
+      method === undefined ||
+      typeof method.next !== 'function'
+    ) {
+      webidl.errors.exception({
+        header: 'Sequence',
+        message: 'Object is not an iterator.'
+      })
+    }
+
+    // https://webidl.spec.whatwg.org/#create-sequence-from-iterable
+    while (true) {
+      const { done, value } = method.next()
+
+      if (done) {
+        break
+      }
+
+      seq.push(converter(value))
+    }
+
+    return seq
+  }
+}
+
+webidl.recordConverter = function (keyConverter, valueConverter) {
+  return (V) => {
+    const record = {}
+    const type = webidl.util.Type(V)
+
+    if (type === 'Undefined' || type === 'Null') {
+      return record
+    }
+
+    if (type !== 'Object') {
+      webidl.errors.exception({
+        header: 'Record',
+        message: `Expected ${V} to be an Object type.`
+      })
+    }
+
+    for (let [key, value] of Object.entries(V)) {
+      key = keyConverter(key)
+      value = valueConverter(value)
+
+      record[key] = value
+    }
+
+    return record
+  }
+}
+
+webidl.interfaceConverter = function (i) {
+  return (V, opts = {}) => {
+    if (opts.strict !== false && !(V instanceof i)) {
+      webidl.errors.exception({
+        header: i.name,
+        message: `Expected ${V} to be an instance of ${i.name}.`
+      })
+    }
+
+    return V
+  }
+}
+
+/**
+ * @param {{
+ *   key: string,
+ *   defaultValue?: any,
+ *   required?: boolean,
+ *   converter: (...args: unknown[]) => unknown,
+ *   allowedValues?: any[]
+ * }[]} converters
+ * @returns
+ */
+webidl.dictionaryConverter = function (converters) {
+  return (dictionary) => {
+    const type = webidl.util.Type(dictionary)
+    const dict = {}
+
+    if (type !== 'Null' && type !== 'Undefined' && type !== 'Object') {
+      webidl.errors.exception({
+        header: 'Dictionary',
+        message: `Expected ${dictionary} to be one of: Null, Undefined, Object.`
+      })
+    }
+
+    for (const options of converters) {
+      const { key, defaultValue, required, converter } = options
+
+      if (required === true) {
+        if (!Object.hasOwn(dictionary, key)) {
+          webidl.errors.exception({
+            header: 'Dictionary',
+            message: `Missing required key "${key}".`
+          })
+        }
+      }
+
+      let value = dictionary[key]
+      const hasDefault = Object.hasOwn(options, 'defaultValue')
+
+      // Only use defaultValue if value is undefined and
+      // a defaultValue options was provided.
+      if (hasDefault && value !== null) {
+        value = value ?? defaultValue
+      }
+
+      // A key can be optional and have no default value.
+      // When this happens, do not perform a conversion,
+      // and do not assign the key a value.
+      if (required || hasDefault || value !== undefined) {
+        value = converter(value)
+
+        if (
+          options.allowedValues &&
+          !options.allowedValues.includes(value)
+        ) {
+          webidl.errors.exception({
+            header: 'Dictionary',
+            message: `${value} is not an accepted type. Expected one of ${options.allowedValues.join(', ')}.`
+          })
+        }
+
+        dict[key] = value
+      }
+    }
+
+    return dict
+  }
+}
+
+webidl.nullableConverter = function (converter) {
+  return (V) => {
+    if (V === null) {
+      return V
+    }
+
+    return converter(V)
+  }
+}
+
+// https://webidl.spec.whatwg.org/#es-DOMString
+webidl.converters.DOMString = function (V, opts = {}) {
+  // 1. If V is null and the conversion is to an IDL type
+  //    associated with the [LegacyNullToEmptyString]
+  //    extended attribute, then return the DOMString value
+  //    that represents the empty string.
+  if (V === null && opts.legacyNullToEmptyString) {
+    return ''
+  }
+
+  // 2. Let x be ? ToString(V).
+  if (typeof V === 'symbol') {
+    throw new TypeError('Could not convert argument of type symbol to string.')
+  }
+
+  // 3. Return the IDL DOMString value that represents the
+  //    same sequence of code units as the one the
+  //    ECMAScript String value x represents.
+  return String(V)
+}
+
+// eslint-disable-next-line no-control-regex
+const isNotLatin1 = /[^\u0000-\u00ff]/
+
+// https://webidl.spec.whatwg.org/#es-ByteString
+webidl.converters.ByteString = function (V) {
+  // 1. Let x be ? ToString(V).
+  // Note: DOMString converter perform ? ToString(V)
+  const x = webidl.converters.DOMString(V)
+
+  // 2. If the value of any element of x is greater than
+  //    255, then throw a TypeError.
+  if (isNotLatin1.test(x)) {
+    throw new TypeError('Argument is not a ByteString')
+  }
+
+  // 3. Return an IDL ByteString value whose length is the
+  //    length of x, and where the value of each element is
+  //    the value of the corresponding element of x.
+  return x
+}
+
+// https://webidl.spec.whatwg.org/#es-USVString
+// TODO: ensure that util.toUSVString follows webidl spec
+webidl.converters.USVString = toUSVString
+
+// https://webidl.spec.whatwg.org/#es-boolean
+webidl.converters.boolean = function (V) {
+  // 1. Let x be the result of computing ToBoolean(V).
+  const x = Boolean(V)
+
+  // 2. Return the IDL boolean value that is the one that represents
+  //    the same truth value as the ECMAScript Boolean value x.
+  return x
+}
+
+// https://webidl.spec.whatwg.org/#es-any
+webidl.converters.any = function (V) {
+  return V
+}
+
+// https://webidl.spec.whatwg.org/#es-long-long
+webidl.converters['long long'] = function (V, opts) {
+  // 1. Let x be ? ConvertToInt(V, 64, "signed").
+  const x = webidl.util.ConvertToInt(V, 64, 'signed', opts)
+
+  // 2. Return the IDL long long value that represents
+  //    the same numeric value as x.
+  return x
+}
+
+// https://webidl.spec.whatwg.org/#es-unsigned-short
+webidl.converters['unsigned short'] = function (V) {
+  // 1. Let x be ? ConvertToInt(V, 16, "unsigned").
+  const x = webidl.util.ConvertToInt(V, 16, 'unsigned')
+
+  // 2. Return the IDL unsigned short value that represents
+  //    the same numeric value as x.
+  return x
+}
+
+// https://webidl.spec.whatwg.org/#idl-ArrayBuffer
+webidl.converters.ArrayBuffer = function (V, opts = {}) {
+  // 1. If Type(V) is not Object, or V does not have an
+  //    [[ArrayBufferData]] internal slot, then throw a
+  //    TypeError.
+  // see: https://tc39.es/ecma262/#sec-properties-of-the-arraybuffer-instances
+  // see: https://tc39.es/ecma262/#sec-properties-of-the-sharedarraybuffer-instances
+  if (
+    webidl.util.Type(V) !== 'Object' ||
+    !types.isAnyArrayBuffer(V)
+  ) {
+    webidl.errors.conversionFailed({
+      prefix: `${V}`,
+      argument: `${V}`,
+      types: ['ArrayBuffer']
+    })
+  }
+
+  // 2. If the conversion is not to an IDL type associated
+  //    with the [AllowShared] extended attribute, and
+  //    IsSharedArrayBuffer(V) is true, then throw a
+  //    TypeError.
+  if (opts.allowShared === false && types.isSharedArrayBuffer(V)) {
+    webidl.errors.exception({
+      header: 'ArrayBuffer',
+      message: 'SharedArrayBuffer is not allowed.'
+    })
+  }
+
+  // 3. If the conversion is not to an IDL type associated
+  //    with the [AllowResizable] extended attribute, and
+  //    IsResizableArrayBuffer(V) is true, then throw a
+  //    TypeError.
+  // Note: resizable ArrayBuffers are currently a proposal.
+
+  // 4. Return the IDL ArrayBuffer value that is a
+  //    reference to the same object as V.
+  return V
+}
+
+webidl.converters.TypedArray = function (V, T, opts = {}) {
+  // 1. Let T be the IDL type V is being converted to.
+
+  // 2. If Type(V) is not Object, or V does not have a
+  //    [[TypedArrayName]] internal slot with a value
+  //    equal to T’s name, then throw a TypeError.
+  if (
+    webidl.util.Type(V) !== 'Object' ||
+    !types.isTypedArray(V) ||
+    V.constructor.name !== T.name
+  ) {
+    webidl.errors.conversionFailed({
+      prefix: `${T.name}`,
+      argument: `${V}`,
+      types: [T.name]
+    })
+  }
+
+  // 3. If the conversion is not to an IDL type associated
+  //    with the [AllowShared] extended attribute, and
+  //    IsSharedArrayBuffer(V.[[ViewedArrayBuffer]]) is
+  //    true, then throw a TypeError.
+  if (opts.allowShared === false && types.isSharedArrayBuffer(V.buffer)) {
+    webidl.errors.exception({
+      header: 'ArrayBuffer',
+      message: 'SharedArrayBuffer is not allowed.'
+    })
+  }
+
+  // 4. If the conversion is not to an IDL type associated
+  //    with the [AllowResizable] extended attribute, and
+  //    IsResizableArrayBuffer(V.[[ViewedArrayBuffer]]) is
+  //    true, then throw a TypeError.
+  // Note: resizable array buffers are currently a proposal
+
+  // 5. Return the IDL value of type T that is a reference
+  //    to the same object as V.
+  return V
+}
+
+webidl.converters.DataView = function (V, opts = {}) {
+  // 1. If Type(V) is not Object, or V does not have a
+  //    [[DataView]] internal slot, then throw a TypeError.
+  if (webidl.util.Type(V) !== 'Object' || !types.isDataView(V)) {
+    webidl.errors.exception({
+      header: 'DataView',
+      message: 'Object is not a DataView.'
+    })
+  }
+
+  // 2. If the conversion is not to an IDL type associated
+  //    with the [AllowShared] extended attribute, and
+  //    IsSharedArrayBuffer(V.[[ViewedArrayBuffer]]) is true,
+  //    then throw a TypeError.
+  if (opts.allowShared === false && types.isSharedArrayBuffer(V.buffer)) {
+    webidl.errors.exception({
+      header: 'ArrayBuffer',
+      message: 'SharedArrayBuffer is not allowed.'
+    })
+  }
+
+  // 3. If the conversion is not to an IDL type associated
+  //    with the [AllowResizable] extended attribute, and
+  //    IsResizableArrayBuffer(V.[[ViewedArrayBuffer]]) is
+  //    true, then throw a TypeError.
+  // Note: resizable ArrayBuffers are currently a proposal
+
+  // 4. Return the IDL DataView value that is a reference
+  //    to the same object as V.
+  return V
+}
+
+// https://webidl.spec.whatwg.org/#BufferSource
+webidl.converters.BufferSource = function (V, opts = {}) {
+  if (types.isAnyArrayBuffer(V)) {
+    return webidl.converters.ArrayBuffer(V, opts)
+  }
+
+  if (types.isTypedArray(V)) {
+    return webidl.converters.TypedArray(V, V.constructor)
+  }
+
+  if (types.isDataView(V)) {
+    return webidl.converters.DataView(V, opts)
+  }
+
+  throw new TypeError(`Could not convert ${V} to a BufferSource.`)
+}
+
+webidl.converters['sequence<ByteString>'] = webidl.sequenceConverter(
+  webidl.converters.ByteString
+)
+
+webidl.converters['sequence<sequence<ByteString>>'] = webidl.sequenceConverter(
+  webidl.converters['sequence<ByteString>']
+)
+
+webidl.converters['record<ByteString, ByteString>'] = webidl.recordConverter(
+  webidl.converters.ByteString,
+  webidl.converters.ByteString
+)
+
+module.exports = {
+  webidl
+}