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-rw-r--r--node_modules/undici/lib/fileapi/util.js392
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+'use strict'
+
+const {
+ kState,
+ kError,
+ kResult,
+ kAborted,
+ kLastProgressEventFired
+} = require('./symbols')
+const { ProgressEvent } = require('./progressevent')
+const { getEncoding } = require('./encoding')
+const { DOMException } = require('../fetch/constants')
+const { serializeAMimeType, parseMIMEType } = require('../fetch/dataURL')
+const { types } = require('util')
+const { StringDecoder } = require('string_decoder')
+const { btoa } = require('buffer')
+
+/** @type {PropertyDescriptor} */
+const staticPropertyDescriptors = {
+ enumerable: true,
+ writable: false,
+ configurable: false
+}
+
+/**
+ * @see https://w3c.github.io/FileAPI/#readOperation
+ * @param {import('./filereader').FileReader} fr
+ * @param {import('buffer').Blob} blob
+ * @param {string} type
+ * @param {string?} encodingName
+ */
+function readOperation (fr, blob, type, encodingName) {
+ // 1. If fr’s state is "loading", throw an InvalidStateError
+ // DOMException.
+ if (fr[kState] === 'loading') {
+ throw new DOMException('Invalid state', 'InvalidStateError')
+ }
+
+ // 2. Set fr’s state to "loading".
+ fr[kState] = 'loading'
+
+ // 3. Set fr’s result to null.
+ fr[kResult] = null
+
+ // 4. Set fr’s error to null.
+ fr[kError] = null
+
+ // 5. Let stream be the result of calling get stream on blob.
+ /** @type {import('stream/web').ReadableStream} */
+ const stream = blob.stream()
+
+ // 6. Let reader be the result of getting a reader from stream.
+ const reader = stream.getReader()
+
+ // 7. Let bytes be an empty byte sequence.
+ /** @type {Uint8Array[]} */
+ const bytes = []
+
+ // 8. Let chunkPromise be the result of reading a chunk from
+ // stream with reader.
+ let chunkPromise = reader.read()
+
+ // 9. Let isFirstChunk be true.
+ let isFirstChunk = true
+
+ // 10. In parallel, while true:
+ // Note: "In parallel" just means non-blocking
+ // Note 2: readOperation itself cannot be async as double
+ // reading the body would then reject the promise, instead
+ // of throwing an error.
+ ;(async () => {
+ while (!fr[kAborted]) {
+ // 1. Wait for chunkPromise to be fulfilled or rejected.
+ try {
+ const { done, value } = await chunkPromise
+
+ // 2. If chunkPromise is fulfilled, and isFirstChunk is
+ // true, queue a task to fire a progress event called
+ // loadstart at fr.
+ if (isFirstChunk && !fr[kAborted]) {
+ queueMicrotask(() => {
+ fireAProgressEvent('loadstart', fr)
+ })
+ }
+
+ // 3. Set isFirstChunk to false.
+ isFirstChunk = false
+
+ // 4. If chunkPromise is fulfilled with an object whose
+ // done property is false and whose value property is
+ // a Uint8Array object, run these steps:
+ if (!done && types.isUint8Array(value)) {
+ // 1. Let bs be the byte sequence represented by the
+ // Uint8Array object.
+
+ // 2. Append bs to bytes.
+ bytes.push(value)
+
+ // 3. If roughly 50ms have passed since these steps
+ // were last invoked, queue a task to fire a
+ // progress event called progress at fr.
+ if (
+ (
+ fr[kLastProgressEventFired] === undefined ||
+ Date.now() - fr[kLastProgressEventFired] >= 50
+ ) &&
+ !fr[kAborted]
+ ) {
+ fr[kLastProgressEventFired] = Date.now()
+ queueMicrotask(() => {
+ fireAProgressEvent('progress', fr)
+ })
+ }
+
+ // 4. Set chunkPromise to the result of reading a
+ // chunk from stream with reader.
+ chunkPromise = reader.read()
+ } else if (done) {
+ // 5. Otherwise, if chunkPromise is fulfilled with an
+ // object whose done property is true, queue a task
+ // to run the following steps and abort this algorithm:
+ queueMicrotask(() => {
+ // 1. Set fr’s state to "done".
+ fr[kState] = 'done'
+
+ // 2. Let result be the result of package data given
+ // bytes, type, blob’s type, and encodingName.
+ try {
+ const result = packageData(bytes, type, blob.type, encodingName)
+
+ // 4. Else:
+
+ if (fr[kAborted]) {
+ return
+ }
+
+ // 1. Set fr’s result to result.
+ fr[kResult] = result
+
+ // 2. Fire a progress event called load at the fr.
+ fireAProgressEvent('load', fr)
+ } catch (error) {
+ // 3. If package data threw an exception error:
+
+ // 1. Set fr’s error to error.
+ fr[kError] = error
+
+ // 2. Fire a progress event called error at fr.
+ fireAProgressEvent('error', fr)
+ }
+
+ // 5. If fr’s state is not "loading", fire a progress
+ // event called loadend at the fr.
+ if (fr[kState] !== 'loading') {
+ fireAProgressEvent('loadend', fr)
+ }
+ })
+
+ break
+ }
+ } catch (error) {
+ if (fr[kAborted]) {
+ return
+ }
+
+ // 6. Otherwise, if chunkPromise is rejected with an
+ // error error, queue a task to run the following
+ // steps and abort this algorithm:
+ queueMicrotask(() => {
+ // 1. Set fr’s state to "done".
+ fr[kState] = 'done'
+
+ // 2. Set fr’s error to error.
+ fr[kError] = error
+
+ // 3. Fire a progress event called error at fr.
+ fireAProgressEvent('error', fr)
+
+ // 4. If fr’s state is not "loading", fire a progress
+ // event called loadend at fr.
+ if (fr[kState] !== 'loading') {
+ fireAProgressEvent('loadend', fr)
+ }
+ })
+
+ break
+ }
+ }
+ })()
+}
+
+/**
+ * @see https://w3c.github.io/FileAPI/#fire-a-progress-event
+ * @see https://dom.spec.whatwg.org/#concept-event-fire
+ * @param {string} e The name of the event
+ * @param {import('./filereader').FileReader} reader
+ */
+function fireAProgressEvent (e, reader) {
+ // The progress event e does not bubble. e.bubbles must be false
+ // The progress event e is NOT cancelable. e.cancelable must be false
+ const event = new ProgressEvent(e, {
+ bubbles: false,
+ cancelable: false
+ })
+
+ reader.dispatchEvent(event)
+}
+
+/**
+ * @see https://w3c.github.io/FileAPI/#blob-package-data
+ * @param {Uint8Array[]} bytes
+ * @param {string} type
+ * @param {string?} mimeType
+ * @param {string?} encodingName
+ */
+function packageData (bytes, type, mimeType, encodingName) {
+ // 1. A Blob has an associated package data algorithm, given
+ // bytes, a type, a optional mimeType, and a optional
+ // encodingName, which switches on type and runs the
+ // associated steps:
+
+ switch (type) {
+ case 'DataURL': {
+ // 1. Return bytes as a DataURL [RFC2397] subject to
+ // the considerations below:
+ // * Use mimeType as part of the Data URL if it is
+ // available in keeping with the Data URL
+ // specification [RFC2397].
+ // * If mimeType is not available return a Data URL
+ // without a media-type. [RFC2397].
+
+ // https://datatracker.ietf.org/doc/html/rfc2397#section-3
+ // dataurl := "data:" [ mediatype ] [ ";base64" ] "," data
+ // mediatype := [ type "/" subtype ] *( ";" parameter )
+ // data := *urlchar
+ // parameter := attribute "=" value
+ let dataURL = 'data:'
+
+ const parsed = parseMIMEType(mimeType || 'application/octet-stream')
+
+ if (parsed !== 'failure') {
+ dataURL += serializeAMimeType(parsed)
+ }
+
+ dataURL += ';base64,'
+
+ const decoder = new StringDecoder('latin1')
+
+ for (const chunk of bytes) {
+ dataURL += btoa(decoder.write(chunk))
+ }
+
+ dataURL += btoa(decoder.end())
+
+ return dataURL
+ }
+ case 'Text': {
+ // 1. Let encoding be failure
+ let encoding = 'failure'
+
+ // 2. If the encodingName is present, set encoding to the
+ // result of getting an encoding from encodingName.
+ if (encodingName) {
+ encoding = getEncoding(encodingName)
+ }
+
+ // 3. If encoding is failure, and mimeType is present:
+ if (encoding === 'failure' && mimeType) {
+ // 1. Let type be the result of parse a MIME type
+ // given mimeType.
+ const type = parseMIMEType(mimeType)
+
+ // 2. If type is not failure, set encoding to the result
+ // of getting an encoding from type’s parameters["charset"].
+ if (type !== 'failure') {
+ encoding = getEncoding(type.parameters.get('charset'))
+ }
+ }
+
+ // 4. If encoding is failure, then set encoding to UTF-8.
+ if (encoding === 'failure') {
+ encoding = 'UTF-8'
+ }
+
+ // 5. Decode bytes using fallback encoding encoding, and
+ // return the result.
+ return decode(bytes, encoding)
+ }
+ case 'ArrayBuffer': {
+ // Return a new ArrayBuffer whose contents are bytes.
+ const sequence = combineByteSequences(bytes)
+
+ return sequence.buffer
+ }
+ case 'BinaryString': {
+ // Return bytes as a binary string, in which every byte
+ // is represented by a code unit of equal value [0..255].
+ let binaryString = ''
+
+ const decoder = new StringDecoder('latin1')
+
+ for (const chunk of bytes) {
+ binaryString += decoder.write(chunk)
+ }
+
+ binaryString += decoder.end()
+
+ return binaryString
+ }
+ }
+}
+
+/**
+ * @see https://encoding.spec.whatwg.org/#decode
+ * @param {Uint8Array[]} ioQueue
+ * @param {string} encoding
+ */
+function decode (ioQueue, encoding) {
+ const bytes = combineByteSequences(ioQueue)
+
+ // 1. Let BOMEncoding be the result of BOM sniffing ioQueue.
+ const BOMEncoding = BOMSniffing(bytes)
+
+ let slice = 0
+
+ // 2. If BOMEncoding is non-null:
+ if (BOMEncoding !== null) {
+ // 1. Set encoding to BOMEncoding.
+ encoding = BOMEncoding
+
+ // 2. Read three bytes from ioQueue, if BOMEncoding is
+ // UTF-8; otherwise read two bytes.
+ // (Do nothing with those bytes.)
+ slice = BOMEncoding === 'UTF-8' ? 3 : 2
+ }
+
+ // 3. Process a queue with an instance of encoding’s
+ // decoder, ioQueue, output, and "replacement".
+
+ // 4. Return output.
+
+ const sliced = bytes.slice(slice)
+ return new TextDecoder(encoding).decode(sliced)
+}
+
+/**
+ * @see https://encoding.spec.whatwg.org/#bom-sniff
+ * @param {Uint8Array} ioQueue
+ */
+function BOMSniffing (ioQueue) {
+ // 1. Let BOM be the result of peeking 3 bytes from ioQueue,
+ // converted to a byte sequence.
+ const [a, b, c] = ioQueue
+
+ // 2. For each of the rows in the table below, starting with
+ // the first one and going down, if BOM starts with the
+ // bytes given in the first column, then return the
+ // encoding given in the cell in the second column of that
+ // row. Otherwise, return null.
+ if (a === 0xEF && b === 0xBB && c === 0xBF) {
+ return 'UTF-8'
+ } else if (a === 0xFE && b === 0xFF) {
+ return 'UTF-16BE'
+ } else if (a === 0xFF && b === 0xFE) {
+ return 'UTF-16LE'
+ }
+
+ return null
+}
+
+/**
+ * @param {Uint8Array[]} sequences
+ */
+function combineByteSequences (sequences) {
+ const size = sequences.reduce((a, b) => {
+ return a + b.byteLength
+ }, 0)
+
+ let offset = 0
+
+ return sequences.reduce((a, b) => {
+ a.set(b, offset)
+ offset += b.byteLength
+ return a
+ }, new Uint8Array(size))
+}
+
+module.exports = {
+ staticPropertyDescriptors,
+ readOperation,
+ fireAProgressEvent
+}