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