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