action-debian-package/node_modules/undici/lib/fetch/webidl.js

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2024-01-06 12:51:02 +00:00
'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: `${V}`,
types: ['ArrayBuffer']
})
}
// 2. If the conversion is not to an IDL type associated
// with the [AllowShared] extended attribute, and
// IsSharedArrayBuffer(V) is true, then throw a
// TypeError.
if (opts.allowShared === false && types.isSharedArrayBuffer(V)) {
throw webidl.errors.exception({
header: 'ArrayBuffer',
message: 'SharedArrayBuffer is not allowed.'
})
}
// 3. If the conversion is not to an IDL type associated
// with the [AllowResizable] extended attribute, and
// IsResizableArrayBuffer(V) is true, then throw a
// TypeError.
// Note: resizable ArrayBuffers are currently a proposal.
// 4. Return the IDL ArrayBuffer value that is a
// reference to the same object as V.
return V
}
webidl.converters.TypedArray = function (V, T, opts = {}) {
// 1. Let T be the IDL type V is being converted to.
// 2. If Type(V) is not Object, or V does not have a
// [[TypedArrayName]] internal slot with a value
// equal to Ts name, then throw a TypeError.
if (
webidl.util.Type(V) !== 'Object' ||
!types.isTypedArray(V) ||
V.constructor.name !== T.name
) {
throw webidl.errors.conversionFailed({
prefix: `${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
}