Adding upstream version 5.28.2+dfsg1+~cs23.11.12.3.upstream/5.28.2+dfsg1+_cs23.11.12.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 646 insertions, 0 deletions

diff --git a/lib/fetch/webidl.js b/lib/fetch/webidl.js
new file mode 100644
index 0000000..6fcf2ab
--- /dev/null
+++ b/lib/fetch/webidl.js
@@ -0,0 +1,646 @@
+'use strict'
+
+const { types } = require('util')
+const { hasOwn, toUSVString } = require('./util')
+
+/** @type {import('../../types/webidl').Webidl} */
+const webidl = {}
+webidl.converters = {}
+webidl.util = {}
+webidl.errors = {}
+
+webidl.errors.exception = function (message) {
+  return new TypeError(`${message.header}: ${message.message}`)
+}
+
+webidl.errors.conversionFailed = function (context) {
+  const plural = context.types.length === 1 ? '' : ' one of'
+  const message =
+    `${context.argument} could not be converted to` +
+    `${plural}: ${context.types.join(', ')}.`
+
+  return webidl.errors.exception({
+    header: context.prefix,
+    message
+  })
+}
+
+webidl.errors.invalidArgument = function (context) {
+  return webidl.errors.exception({
+    header: context.prefix,
+    message: `"${context.value}" is an invalid ${context.type}.`
+  })
+}
+
+// https://webidl.spec.whatwg.org/#implements
+webidl.brandCheck = function (V, I, opts = undefined) {
+  if (opts?.strict !== false && !(V instanceof I)) {
+    throw new TypeError('Illegal invocation')
+  } else {
+    return V?.[Symbol.toStringTag] === I.prototype[Symbol.toStringTag]
+  }
+}
+
+webidl.argumentLengthCheck = function ({ length }, min, ctx) {
+  if (length < min) {
+    throw webidl.errors.exception({
+      message: `${min} argument${min !== 1 ? 's' : ''} required, ` +
+               `but${length ? ' only' : ''} ${length} found.`,
+      ...ctx
+    })
+  }
+}
+
+webidl.illegalConstructor = function () {
+  throw webidl.errors.exception({
+    header: 'TypeError',
+    message: 'Illegal constructor'
+  })
+}
+
+// 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 (x === 0) {
+    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
+    ) {
+      throw 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) {
+      throw 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) ||
+    (x === 0 && 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') {
+      throw 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'
+    ) {
+      throw 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
+  }
+}
+
+// https://webidl.spec.whatwg.org/#es-to-record
+webidl.recordConverter = function (keyConverter, valueConverter) {
+  return (O) => {
+    // 1. If Type(O) is not Object, throw a TypeError.
+    if (webidl.util.Type(O) !== 'Object') {
+      throw webidl.errors.exception({
+        header: 'Record',
+        message: `Value of type ${webidl.util.Type(O)} is not an Object.`
+      })
+    }
+
+    // 2. Let result be a new empty instance of record<K, V>.
+    const result = {}
+
+    if (!types.isProxy(O)) {
+      // Object.keys only returns enumerable properties
+      const keys = Object.keys(O)
+
+      for (const key of keys) {
+        // 1. Let typedKey be key converted to an IDL value of type K.
+        const typedKey = keyConverter(key)
+
+        // 2. Let value be ? Get(O, key).
+        // 3. Let typedValue be value converted to an IDL value of type V.
+        const typedValue = valueConverter(O[key])
+
+        // 4. Set result[typedKey] to typedValue.
+        result[typedKey] = typedValue
+      }
+
+      // 5. Return result.
+      return result
+    }
+
+    // 3. Let keys be ? O.[[OwnPropertyKeys]]().
+    const keys = Reflect.ownKeys(O)
+
+    // 4. For each key of keys.
+    for (const key of keys) {
+      // 1. Let desc be ? O.[[GetOwnProperty]](key).
+      const desc = Reflect.getOwnPropertyDescriptor(O, key)
+
+      // 2. If desc is not undefined and desc.[[Enumerable]] is true:
+      if (desc?.enumerable) {
+        // 1. Let typedKey be key converted to an IDL value of type K.
+        const typedKey = keyConverter(key)
+
+        // 2. Let value be ? Get(O, key).
+        // 3. Let typedValue be value converted to an IDL value of type V.
+        const typedValue = valueConverter(O[key])
+
+        // 4. Set result[typedKey] to typedValue.
+        result[typedKey] = typedValue
+      }
+    }
+
+    // 5. Return result.
+    return result
+  }
+}
+
+webidl.interfaceConverter = function (i) {
+  return (V, opts = {}) => {
+    if (opts.strict !== false && !(V instanceof i)) {
+      throw webidl.errors.exception({
+        header: i.name,
+        message: `Expected ${V} to be an instance of ${i.name}.`
+      })
+    }
+
+    return V
+  }
+}
+
+webidl.dictionaryConverter = function (converters) {
+  return (dictionary) => {
+    const type = webidl.util.Type(dictionary)
+    const dict = {}
+
+    if (type === 'Null' || type === 'Undefined') {
+      return dict
+    } else if (type !== 'Object') {
+      throw webidl.errors.exception({
+        header: 'Dictionary',
+        message: `Expected ${dictionary} to be one of: Null, Undefined, Object.`
+      })
+    }
+
+    for (const options of converters) {
+      const { key, defaultValue, required, converter } = options
+
+      if (required === true) {
+        if (!hasOwn(dictionary, key)) {
+          throw webidl.errors.exception({
+            header: 'Dictionary',
+            message: `Missing required key "${key}".`
+          })
+        }
+      }
+
+      let value = dictionary[key]
+      const hasDefault = 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)
+        ) {
+          throw 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)
+}
+
+// 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.
+  for (let index = 0; index < x.length; index++) {
+    if (x.charCodeAt(index) > 255) {
+      throw new TypeError(
+        'Cannot convert argument to a ByteString because the character at ' +
+        `index ${index} has a value of ${x.charCodeAt(index)} which is greater than 255.`
+      )
+    }
+  }
+
+  // 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
+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) {
+  // 1. Let x be ? ConvertToInt(V, 64, "signed").
+  const x = webidl.util.ConvertToInt(V, 64, 'signed')
+
+  // 2. Return the IDL long long value that represents
+  //    the same numeric value as x.
+  return x
+}
+
+// https://webidl.spec.whatwg.org/#es-unsigned-long-long
+webidl.converters['unsigned long long'] = function (V) {
+  // 1. Let x be ? ConvertToInt(V, 64, "unsigned").
+  const x = webidl.util.ConvertToInt(V, 64, 'unsigned')
+
+  // 2. Return the IDL unsigned long long value that
+  //    represents the same numeric value as x.
+  return x
+}
+
+// https://webidl.spec.whatwg.org/#es-unsigned-long
+webidl.converters['unsigned long'] = function (V) {
+  // 1. Let x be ? ConvertToInt(V, 32, "unsigned").
+  const x = webidl.util.ConvertToInt(V, 32, 'unsigned')
+
+  // 2. Return the IDL unsigned 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, opts) {
+  // 1. Let x be ? ConvertToInt(V, 16, "unsigned").
+  const x = webidl.util.ConvertToInt(V, 16, 'unsigned', opts)
+
+  // 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)
+  ) {
+    throw webidl.errors.conversionFailed({
+      prefix: `${V}`,
+      argument: `${V}`,
+      types: ['ArrayBuffer']
+    })
+  }
+
+  // 2. If the conversion is not to an IDL type associated
+  //    with the [AllowShared] extended attribute, and
+  //    IsSharedArrayBuffer(V) is true, then throw a
+  //    TypeError.
+  if (opts.allowShared === false && types.isSharedArrayBuffer(V)) {
+    throw webidl.errors.exception({
+      header: 'ArrayBuffer',
+      message: 'SharedArrayBuffer is not allowed.'
+    })
+  }
+
+  // 3. If the conversion is not to an IDL type associated
+  //    with the [AllowResizable] extended attribute, and
+  //    IsResizableArrayBuffer(V) is true, then throw a
+  //    TypeError.
+  // Note: resizable ArrayBuffers are currently a proposal.
+
+  // 4. Return the IDL ArrayBuffer value that is a
+  //    reference to the same object as V.
+  return V
+}
+
+webidl.converters.TypedArray = function (V, T, opts = {}) {
+  // 1. Let T be the IDL type V is being converted to.
+
+  // 2. If Type(V) is not Object, or V does not have a
+  //    [[TypedArrayName]] internal slot with a value
+  //    equal to T’s name, then throw a TypeError.
+  if (
+    webidl.util.Type(V) !== 'Object' ||
+    !types.isTypedArray(V) ||
+    V.constructor.name !== T.name
+  ) {
+    throw webidl.errors.conversionFailed({
+      prefix: `${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)) {
+    throw 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)) {
+    throw 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)) {
+    throw 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
+}