606 lines
19 KiB
JavaScript
606 lines
19 KiB
JavaScript
'use strict'
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const Busboy = require('@fastify/busboy')
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const util = require('../core/util')
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const {
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ReadableStreamFrom,
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isBlobLike,
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isReadableStreamLike,
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readableStreamClose,
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createDeferredPromise,
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fullyReadBody
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} = require('./util')
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const { FormData } = require('./formdata')
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const { kState } = require('./symbols')
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const { webidl } = require('./webidl')
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const { DOMException, structuredClone } = require('./constants')
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const { Blob, File: NativeFile } = require('buffer')
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const { kBodyUsed } = require('../core/symbols')
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const assert = require('assert')
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const { isErrored } = require('../core/util')
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const { isUint8Array, isArrayBuffer } = require('util/types')
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const { File: UndiciFile } = require('./file')
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const { parseMIMEType, serializeAMimeType } = require('./dataURL')
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let ReadableStream = globalThis.ReadableStream
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/** @type {globalThis['File']} */
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const File = NativeFile ?? UndiciFile
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const textEncoder = new TextEncoder()
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const textDecoder = new TextDecoder()
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// https://fetch.spec.whatwg.org/#concept-bodyinit-extract
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function extractBody (object, keepalive = false) {
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if (!ReadableStream) {
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ReadableStream = require('stream/web').ReadableStream
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}
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// 1. Let stream be null.
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let stream = null
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// 2. If object is a ReadableStream object, then set stream to object.
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if (object instanceof ReadableStream) {
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stream = object
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} else if (isBlobLike(object)) {
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// 3. Otherwise, if object is a Blob object, set stream to the
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// result of running object’s get stream.
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stream = object.stream()
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} else {
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// 4. Otherwise, set stream to a new ReadableStream object, and set
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// up stream.
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stream = new ReadableStream({
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async pull (controller) {
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controller.enqueue(
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typeof source === 'string' ? textEncoder.encode(source) : source
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)
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queueMicrotask(() => readableStreamClose(controller))
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},
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start () {},
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type: undefined
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})
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}
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// 5. Assert: stream is a ReadableStream object.
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assert(isReadableStreamLike(stream))
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// 6. Let action be null.
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let action = null
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// 7. Let source be null.
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let source = null
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// 8. Let length be null.
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let length = null
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// 9. Let type be null.
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let type = null
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// 10. Switch on object:
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if (typeof object === 'string') {
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// Set source to the UTF-8 encoding of object.
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// Note: setting source to a Uint8Array here breaks some mocking assumptions.
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source = object
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// Set type to `text/plain;charset=UTF-8`.
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type = 'text/plain;charset=UTF-8'
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} else if (object instanceof URLSearchParams) {
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// URLSearchParams
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// spec says to run application/x-www-form-urlencoded on body.list
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// this is implemented in Node.js as apart of an URLSearchParams instance toString method
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// See: https://github.com/nodejs/node/blob/e46c680bf2b211bbd52cf959ca17ee98c7f657f5/lib/internal/url.js#L490
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// and https://github.com/nodejs/node/blob/e46c680bf2b211bbd52cf959ca17ee98c7f657f5/lib/internal/url.js#L1100
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// Set source to the result of running the application/x-www-form-urlencoded serializer with object’s list.
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source = object.toString()
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// Set type to `application/x-www-form-urlencoded;charset=UTF-8`.
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type = 'application/x-www-form-urlencoded;charset=UTF-8'
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} else if (isArrayBuffer(object)) {
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// BufferSource/ArrayBuffer
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// Set source to a copy of the bytes held by object.
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source = new Uint8Array(object.slice())
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} else if (ArrayBuffer.isView(object)) {
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// BufferSource/ArrayBufferView
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// Set source to a copy of the bytes held by object.
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source = new Uint8Array(object.buffer.slice(object.byteOffset, object.byteOffset + object.byteLength))
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} else if (util.isFormDataLike(object)) {
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const boundary = `----formdata-undici-0${`${Math.floor(Math.random() * 1e11)}`.padStart(11, '0')}`
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const prefix = `--${boundary}\r\nContent-Disposition: form-data`
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/*! formdata-polyfill. MIT License. Jimmy Wärting <https://jimmy.warting.se/opensource> */
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const escape = (str) =>
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str.replace(/\n/g, '%0A').replace(/\r/g, '%0D').replace(/"/g, '%22')
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const normalizeLinefeeds = (value) => value.replace(/\r?\n|\r/g, '\r\n')
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// Set action to this step: run the multipart/form-data
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// encoding algorithm, with object’s entry list and UTF-8.
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// - This ensures that the body is immutable and can't be changed afterwords
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// - That the content-length is calculated in advance.
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// - And that all parts are pre-encoded and ready to be sent.
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const blobParts = []
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const rn = new Uint8Array([13, 10]) // '\r\n'
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length = 0
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let hasUnknownSizeValue = false
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for (const [name, value] of object) {
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if (typeof value === 'string') {
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const chunk = textEncoder.encode(prefix +
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`; name="${escape(normalizeLinefeeds(name))}"` +
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`\r\n\r\n${normalizeLinefeeds(value)}\r\n`)
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blobParts.push(chunk)
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length += chunk.byteLength
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} else {
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const chunk = textEncoder.encode(`${prefix}; name="${escape(normalizeLinefeeds(name))}"` +
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(value.name ? `; filename="${escape(value.name)}"` : '') + '\r\n' +
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`Content-Type: ${
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value.type || 'application/octet-stream'
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}\r\n\r\n`)
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blobParts.push(chunk, value, rn)
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if (typeof value.size === 'number') {
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length += chunk.byteLength + value.size + rn.byteLength
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} else {
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hasUnknownSizeValue = true
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}
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}
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}
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const chunk = textEncoder.encode(`--${boundary}--`)
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blobParts.push(chunk)
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length += chunk.byteLength
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if (hasUnknownSizeValue) {
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length = null
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}
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// Set source to object.
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source = object
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action = async function * () {
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for (const part of blobParts) {
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if (part.stream) {
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yield * part.stream()
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} else {
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yield part
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}
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}
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}
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// Set type to `multipart/form-data; boundary=`,
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// followed by the multipart/form-data boundary string generated
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// by the multipart/form-data encoding algorithm.
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type = 'multipart/form-data; boundary=' + boundary
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} else if (isBlobLike(object)) {
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// Blob
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// Set source to object.
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source = object
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// Set length to object’s size.
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length = object.size
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// If object’s type attribute is not the empty byte sequence, set
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// type to its value.
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if (object.type) {
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type = object.type
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}
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} else if (typeof object[Symbol.asyncIterator] === 'function') {
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// If keepalive is true, then throw a TypeError.
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if (keepalive) {
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throw new TypeError('keepalive')
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}
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// If object is disturbed or locked, then throw a TypeError.
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if (util.isDisturbed(object) || object.locked) {
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throw new TypeError(
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'Response body object should not be disturbed or locked'
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)
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}
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stream =
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object instanceof ReadableStream ? object : ReadableStreamFrom(object)
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}
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// 11. If source is a byte sequence, then set action to a
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// step that returns source and length to source’s length.
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if (typeof source === 'string' || util.isBuffer(source)) {
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length = Buffer.byteLength(source)
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}
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// 12. If action is non-null, then run these steps in in parallel:
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if (action != null) {
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// Run action.
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let iterator
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stream = new ReadableStream({
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async start () {
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iterator = action(object)[Symbol.asyncIterator]()
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},
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async pull (controller) {
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const { value, done } = await iterator.next()
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if (done) {
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// When running action is done, close stream.
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queueMicrotask(() => {
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controller.close()
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})
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} else {
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// Whenever one or more bytes are available and stream is not errored,
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// enqueue a Uint8Array wrapping an ArrayBuffer containing the available
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// bytes into stream.
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if (!isErrored(stream)) {
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controller.enqueue(new Uint8Array(value))
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}
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}
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return controller.desiredSize > 0
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},
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async cancel (reason) {
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await iterator.return()
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},
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type: undefined
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})
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}
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// 13. Let body be a body whose stream is stream, source is source,
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// and length is length.
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const body = { stream, source, length }
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// 14. Return (body, type).
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return [body, type]
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}
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// https://fetch.spec.whatwg.org/#bodyinit-safely-extract
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function safelyExtractBody (object, keepalive = false) {
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if (!ReadableStream) {
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// istanbul ignore next
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ReadableStream = require('stream/web').ReadableStream
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}
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// To safely extract a body and a `Content-Type` value from
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// a byte sequence or BodyInit object object, run these steps:
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// 1. If object is a ReadableStream object, then:
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if (object instanceof ReadableStream) {
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// Assert: object is neither disturbed nor locked.
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// istanbul ignore next
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assert(!util.isDisturbed(object), 'The body has already been consumed.')
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// istanbul ignore next
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assert(!object.locked, 'The stream is locked.')
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}
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// 2. Return the results of extracting object.
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return extractBody(object, keepalive)
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}
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function cloneBody (body) {
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// To clone a body body, run these steps:
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// https://fetch.spec.whatwg.org/#concept-body-clone
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// 1. Let « out1, out2 » be the result of teeing body’s stream.
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const [out1, out2] = body.stream.tee()
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const out2Clone = structuredClone(out2, { transfer: [out2] })
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// This, for whatever reasons, unrefs out2Clone which allows
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// the process to exit by itself.
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const [, finalClone] = out2Clone.tee()
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// 2. Set body’s stream to out1.
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body.stream = out1
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// 3. Return a body whose stream is out2 and other members are copied from body.
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return {
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stream: finalClone,
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length: body.length,
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source: body.source
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}
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}
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async function * consumeBody (body) {
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if (body) {
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if (isUint8Array(body)) {
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yield body
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} else {
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const stream = body.stream
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if (util.isDisturbed(stream)) {
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throw new TypeError('The body has already been consumed.')
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}
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if (stream.locked) {
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throw new TypeError('The stream is locked.')
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}
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// Compat.
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stream[kBodyUsed] = true
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yield * stream
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}
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}
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}
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function throwIfAborted (state) {
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if (state.aborted) {
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throw new DOMException('The operation was aborted.', 'AbortError')
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}
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}
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function bodyMixinMethods (instance) {
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const methods = {
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blob () {
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// The blob() method steps are to return the result of
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// running consume body with this and the following step
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// given a byte sequence bytes: return a Blob whose
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// contents are bytes and whose type attribute is this’s
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// MIME type.
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return specConsumeBody(this, (bytes) => {
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let mimeType = bodyMimeType(this)
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if (mimeType === 'failure') {
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mimeType = ''
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} else if (mimeType) {
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mimeType = serializeAMimeType(mimeType)
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}
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// Return a Blob whose contents are bytes and type attribute
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// is mimeType.
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return new Blob([bytes], { type: mimeType })
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}, instance)
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},
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arrayBuffer () {
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// The arrayBuffer() method steps are to return the result
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// of running consume body with this and the following step
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// given a byte sequence bytes: return a new ArrayBuffer
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// whose contents are bytes.
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return specConsumeBody(this, (bytes) => {
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return new Uint8Array(bytes).buffer
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}, instance)
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},
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text () {
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// The text() method steps are to return the result of running
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// consume body with this and UTF-8 decode.
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return specConsumeBody(this, utf8DecodeBytes, instance)
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},
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json () {
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// The json() method steps are to return the result of running
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// consume body with this and parse JSON from bytes.
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return specConsumeBody(this, parseJSONFromBytes, instance)
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},
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async formData () {
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webidl.brandCheck(this, instance)
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throwIfAborted(this[kState])
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const contentType = this.headers.get('Content-Type')
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// If mimeType’s essence is "multipart/form-data", then:
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if (/multipart\/form-data/.test(contentType)) {
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const headers = {}
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for (const [key, value] of this.headers) headers[key.toLowerCase()] = value
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const responseFormData = new FormData()
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let busboy
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try {
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busboy = new Busboy({
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headers,
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preservePath: true
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})
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} catch (err) {
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throw new DOMException(`${err}`, 'AbortError')
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}
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busboy.on('field', (name, value) => {
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responseFormData.append(name, value)
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})
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busboy.on('file', (name, value, filename, encoding, mimeType) => {
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const chunks = []
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if (encoding === 'base64' || encoding.toLowerCase() === 'base64') {
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let base64chunk = ''
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value.on('data', (chunk) => {
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base64chunk += chunk.toString().replace(/[\r\n]/gm, '')
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const end = base64chunk.length - base64chunk.length % 4
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chunks.push(Buffer.from(base64chunk.slice(0, end), 'base64'))
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base64chunk = base64chunk.slice(end)
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})
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value.on('end', () => {
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chunks.push(Buffer.from(base64chunk, 'base64'))
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responseFormData.append(name, new File(chunks, filename, { type: mimeType }))
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})
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} else {
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value.on('data', (chunk) => {
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chunks.push(chunk)
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})
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value.on('end', () => {
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responseFormData.append(name, new File(chunks, filename, { type: mimeType }))
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})
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}
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})
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const busboyResolve = new Promise((resolve, reject) => {
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busboy.on('finish', resolve)
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busboy.on('error', (err) => reject(new TypeError(err)))
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})
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if (this.body !== null) for await (const chunk of consumeBody(this[kState].body)) busboy.write(chunk)
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busboy.end()
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await busboyResolve
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return responseFormData
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} else if (/application\/x-www-form-urlencoded/.test(contentType)) {
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// Otherwise, if mimeType’s essence is "application/x-www-form-urlencoded", then:
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// 1. Let entries be the result of parsing bytes.
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let entries
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try {
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let text = ''
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// application/x-www-form-urlencoded parser will keep the BOM.
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// https://url.spec.whatwg.org/#concept-urlencoded-parser
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// Note that streaming decoder is stateful and cannot be reused
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const streamingDecoder = new TextDecoder('utf-8', { ignoreBOM: true })
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for await (const chunk of consumeBody(this[kState].body)) {
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if (!isUint8Array(chunk)) {
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throw new TypeError('Expected Uint8Array chunk')
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}
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text += streamingDecoder.decode(chunk, { stream: true })
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}
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text += streamingDecoder.decode()
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entries = new URLSearchParams(text)
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} catch (err) {
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// istanbul ignore next: Unclear when new URLSearchParams can fail on a string.
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// 2. If entries is failure, then throw a TypeError.
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throw Object.assign(new TypeError(), { cause: err })
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}
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// 3. Return a new FormData object whose entries are entries.
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const formData = new FormData()
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for (const [name, value] of entries) {
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formData.append(name, value)
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}
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return formData
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} else {
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// Wait a tick before checking if the request has been aborted.
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// Otherwise, a TypeError can be thrown when an AbortError should.
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await Promise.resolve()
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throwIfAborted(this[kState])
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// Otherwise, throw a TypeError.
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throw webidl.errors.exception({
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header: `${instance.name}.formData`,
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message: 'Could not parse content as FormData.'
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})
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}
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}
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}
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return methods
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}
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function mixinBody (prototype) {
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Object.assign(prototype.prototype, bodyMixinMethods(prototype))
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}
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/**
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* @see https://fetch.spec.whatwg.org/#concept-body-consume-body
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* @param {Response|Request} object
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* @param {(value: unknown) => unknown} convertBytesToJSValue
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* @param {Response|Request} instance
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*/
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async function specConsumeBody (object, convertBytesToJSValue, instance) {
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webidl.brandCheck(object, instance)
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throwIfAborted(object[kState])
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// 1. If object is unusable, then return a promise rejected
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// with a TypeError.
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if (bodyUnusable(object[kState].body)) {
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throw new TypeError('Body is unusable')
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}
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// 2. Let promise be a new promise.
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const promise = createDeferredPromise()
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// 3. Let errorSteps given error be to reject promise with error.
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const errorSteps = (error) => promise.reject(error)
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// 4. Let successSteps given a byte sequence data be to resolve
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// promise with the result of running convertBytesToJSValue
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// with data. If that threw an exception, then run errorSteps
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// with that exception.
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const successSteps = (data) => {
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try {
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promise.resolve(convertBytesToJSValue(data))
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} catch (e) {
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errorSteps(e)
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}
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}
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|
||
// 5. If object’s body is null, then run successSteps with an
|
||
// empty byte sequence.
|
||
if (object[kState].body == null) {
|
||
successSteps(new Uint8Array())
|
||
return promise.promise
|
||
}
|
||
|
||
// 6. Otherwise, fully read object’s body given successSteps,
|
||
// errorSteps, and object’s relevant global object.
|
||
await fullyReadBody(object[kState].body, successSteps, errorSteps)
|
||
|
||
// 7. Return promise.
|
||
return promise.promise
|
||
}
|
||
|
||
// https://fetch.spec.whatwg.org/#body-unusable
|
||
function bodyUnusable (body) {
|
||
// An object including the Body interface mixin is
|
||
// said to be unusable if its body is non-null and
|
||
// its body’s stream is disturbed or locked.
|
||
return body != null && (body.stream.locked || util.isDisturbed(body.stream))
|
||
}
|
||
|
||
/**
|
||
* @see https://encoding.spec.whatwg.org/#utf-8-decode
|
||
* @param {Buffer} buffer
|
||
*/
|
||
function utf8DecodeBytes (buffer) {
|
||
if (buffer.length === 0) {
|
||
return ''
|
||
}
|
||
|
||
// 1. Let buffer be the result of peeking three bytes from
|
||
// ioQueue, converted to a byte sequence.
|
||
|
||
// 2. If buffer is 0xEF 0xBB 0xBF, then read three
|
||
// bytes from ioQueue. (Do nothing with those bytes.)
|
||
if (buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
|
||
buffer = buffer.subarray(3)
|
||
}
|
||
|
||
// 3. Process a queue with an instance of UTF-8’s
|
||
// decoder, ioQueue, output, and "replacement".
|
||
const output = textDecoder.decode(buffer)
|
||
|
||
// 4. Return output.
|
||
return output
|
||
}
|
||
|
||
/**
|
||
* @see https://infra.spec.whatwg.org/#parse-json-bytes-to-a-javascript-value
|
||
* @param {Uint8Array} bytes
|
||
*/
|
||
function parseJSONFromBytes (bytes) {
|
||
return JSON.parse(utf8DecodeBytes(bytes))
|
||
}
|
||
|
||
/**
|
||
* @see https://fetch.spec.whatwg.org/#concept-body-mime-type
|
||
* @param {import('./response').Response|import('./request').Request} object
|
||
*/
|
||
function bodyMimeType (object) {
|
||
const { headersList } = object[kState]
|
||
const contentType = headersList.get('content-type')
|
||
|
||
if (contentType === null) {
|
||
return 'failure'
|
||
}
|
||
|
||
return parseMIMEType(contentType)
|
||
}
|
||
|
||
module.exports = {
|
||
extractBody,
|
||
safelyExtractBody,
|
||
cloneBody,
|
||
mixinBody
|
||
}
|