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Diffstat (limited to 'g4f/Provider/npm/node_modules/undici/lib/fileapi/util.js')
| -rw-r--r-- | g4f/Provider/npm/node_modules/undici/lib/fileapi/util.js | 392 |
1 files changed, 0 insertions, 392 deletions
diff --git a/g4f/Provider/npm/node_modules/undici/lib/fileapi/util.js b/g4f/Provider/npm/node_modules/undici/lib/fileapi/util.js deleted file mode 100644 index 1d10899c..00000000 --- a/g4f/Provider/npm/node_modules/undici/lib/fileapi/util.js +++ /dev/null @@ -1,392 +0,0 @@ -'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 -} |