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authorTekky <98614666+xtekky@users.noreply.github.com>2023-11-18 12:24:39 +0100
committerGitHub <noreply@github.com>2023-11-18 12:24:39 +0100
commit2fcb3f949bbde7f5380acc68dc6b1f938dec12bc (patch)
tree035bd400b4057a744b29a0ebee96579bfbf429f6 /g4f/Provider/npm/node_modules/undici/lib/fetch/dataURL.js
parent~ | g4f `v-0.1.8.5` (diff)
parentAdd AiChatOnline, ChatgptDemoAi, ChatgptNext Providers (diff)
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diff --git a/g4f/Provider/npm/node_modules/undici/lib/fetch/dataURL.js b/g4f/Provider/npm/node_modules/undici/lib/fetch/dataURL.js
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-const assert = require('assert')
-const { atob } = require('buffer')
-const { isomorphicDecode } = require('./util')
-
-const encoder = new TextEncoder()
-
-/**
- * @see https://mimesniff.spec.whatwg.org/#http-token-code-point
- */
-const HTTP_TOKEN_CODEPOINTS = /^[!#$%&'*+-.^_|~A-Za-z0-9]+$/
-const HTTP_WHITESPACE_REGEX = /(\u000A|\u000D|\u0009|\u0020)/ // eslint-disable-line
-/**
- * @see https://mimesniff.spec.whatwg.org/#http-quoted-string-token-code-point
- */
-const HTTP_QUOTED_STRING_TOKENS = /[\u0009|\u0020-\u007E|\u0080-\u00FF]/ // eslint-disable-line
-
-// https://fetch.spec.whatwg.org/#data-url-processor
-/** @param {URL} dataURL */
-function dataURLProcessor (dataURL) {
- // 1. Assert: dataURL’s scheme is "data".
- assert(dataURL.protocol === 'data:')
-
- // 2. Let input be the result of running the URL
- // serializer on dataURL with exclude fragment
- // set to true.
- let input = URLSerializer(dataURL, true)
-
- // 3. Remove the leading "data:" string from input.
- input = input.slice(5)
-
- // 4. Let position point at the start of input.
- const position = { position: 0 }
-
- // 5. Let mimeType be the result of collecting a
- // sequence of code points that are not equal
- // to U+002C (,), given position.
- let mimeType = collectASequenceOfCodePointsFast(
- ',',
- input,
- position
- )
-
- // 6. Strip leading and trailing ASCII whitespace
- // from mimeType.
- // Undici implementation note: we need to store the
- // length because if the mimetype has spaces removed,
- // the wrong amount will be sliced from the input in
- // step #9
- const mimeTypeLength = mimeType.length
- mimeType = removeASCIIWhitespace(mimeType, true, true)
-
- // 7. If position is past the end of input, then
- // return failure
- if (position.position >= input.length) {
- return 'failure'
- }
-
- // 8. Advance position by 1.
- position.position++
-
- // 9. Let encodedBody be the remainder of input.
- const encodedBody = input.slice(mimeTypeLength + 1)
-
- // 10. Let body be the percent-decoding of encodedBody.
- let body = stringPercentDecode(encodedBody)
-
- // 11. If mimeType ends with U+003B (;), followed by
- // zero or more U+0020 SPACE, followed by an ASCII
- // case-insensitive match for "base64", then:
- if (/;(\u0020){0,}base64$/i.test(mimeType)) {
- // 1. Let stringBody be the isomorphic decode of body.
- const stringBody = isomorphicDecode(body)
-
- // 2. Set body to the forgiving-base64 decode of
- // stringBody.
- body = forgivingBase64(stringBody)
-
- // 3. If body is failure, then return failure.
- if (body === 'failure') {
- return 'failure'
- }
-
- // 4. Remove the last 6 code points from mimeType.
- mimeType = mimeType.slice(0, -6)
-
- // 5. Remove trailing U+0020 SPACE code points from mimeType,
- // if any.
- mimeType = mimeType.replace(/(\u0020)+$/, '')
-
- // 6. Remove the last U+003B (;) code point from mimeType.
- mimeType = mimeType.slice(0, -1)
- }
-
- // 12. If mimeType starts with U+003B (;), then prepend
- // "text/plain" to mimeType.
- if (mimeType.startsWith(';')) {
- mimeType = 'text/plain' + mimeType
- }
-
- // 13. Let mimeTypeRecord be the result of parsing
- // mimeType.
- let mimeTypeRecord = parseMIMEType(mimeType)
-
- // 14. If mimeTypeRecord is failure, then set
- // mimeTypeRecord to text/plain;charset=US-ASCII.
- if (mimeTypeRecord === 'failure') {
- mimeTypeRecord = parseMIMEType('text/plain;charset=US-ASCII')
- }
-
- // 15. Return a new data: URL struct whose MIME
- // type is mimeTypeRecord and body is body.
- // https://fetch.spec.whatwg.org/#data-url-struct
- return { mimeType: mimeTypeRecord, body }
-}
-
-// https://url.spec.whatwg.org/#concept-url-serializer
-/**
- * @param {URL} url
- * @param {boolean} excludeFragment
- */
-function URLSerializer (url, excludeFragment = false) {
- const href = url.href
-
- if (!excludeFragment) {
- return href
- }
-
- const hash = href.lastIndexOf('#')
- if (hash === -1) {
- return href
- }
- return href.slice(0, hash)
-}
-
-// https://infra.spec.whatwg.org/#collect-a-sequence-of-code-points
-/**
- * @param {(char: string) => boolean} condition
- * @param {string} input
- * @param {{ position: number }} position
- */
-function collectASequenceOfCodePoints (condition, input, position) {
- // 1. Let result be the empty string.
- let result = ''
-
- // 2. While position doesn’t point past the end of input and the
- // code point at position within input meets the condition condition:
- while (position.position < input.length && condition(input[position.position])) {
- // 1. Append that code point to the end of result.
- result += input[position.position]
-
- // 2. Advance position by 1.
- position.position++
- }
-
- // 3. Return result.
- return result
-}
-
-/**
- * A faster collectASequenceOfCodePoints that only works when comparing a single character.
- * @param {string} char
- * @param {string} input
- * @param {{ position: number }} position
- */
-function collectASequenceOfCodePointsFast (char, input, position) {
- const idx = input.indexOf(char, position.position)
- const start = position.position
-
- if (idx === -1) {
- position.position = input.length
- return input.slice(start)
- }
-
- position.position = idx
- return input.slice(start, position.position)
-}
-
-// https://url.spec.whatwg.org/#string-percent-decode
-/** @param {string} input */
-function stringPercentDecode (input) {
- // 1. Let bytes be the UTF-8 encoding of input.
- const bytes = encoder.encode(input)
-
- // 2. Return the percent-decoding of bytes.
- return percentDecode(bytes)
-}
-
-// https://url.spec.whatwg.org/#percent-decode
-/** @param {Uint8Array} input */
-function percentDecode (input) {
- // 1. Let output be an empty byte sequence.
- /** @type {number[]} */
- const output = []
-
- // 2. For each byte byte in input:
- for (let i = 0; i < input.length; i++) {
- const byte = input[i]
-
- // 1. If byte is not 0x25 (%), then append byte to output.
- if (byte !== 0x25) {
- output.push(byte)
-
- // 2. Otherwise, if byte is 0x25 (%) and the next two bytes
- // after byte in input are not in the ranges
- // 0x30 (0) to 0x39 (9), 0x41 (A) to 0x46 (F),
- // and 0x61 (a) to 0x66 (f), all inclusive, append byte
- // to output.
- } else if (
- byte === 0x25 &&
- !/^[0-9A-Fa-f]{2}$/i.test(String.fromCharCode(input[i + 1], input[i + 2]))
- ) {
- output.push(0x25)
-
- // 3. Otherwise:
- } else {
- // 1. Let bytePoint be the two bytes after byte in input,
- // decoded, and then interpreted as hexadecimal number.
- const nextTwoBytes = String.fromCharCode(input[i + 1], input[i + 2])
- const bytePoint = Number.parseInt(nextTwoBytes, 16)
-
- // 2. Append a byte whose value is bytePoint to output.
- output.push(bytePoint)
-
- // 3. Skip the next two bytes in input.
- i += 2
- }
- }
-
- // 3. Return output.
- return Uint8Array.from(output)
-}
-
-// https://mimesniff.spec.whatwg.org/#parse-a-mime-type
-/** @param {string} input */
-function parseMIMEType (input) {
- // 1. Remove any leading and trailing HTTP whitespace
- // from input.
- input = removeHTTPWhitespace(input, true, true)
-
- // 2. Let position be a position variable for input,
- // initially pointing at the start of input.
- const position = { position: 0 }
-
- // 3. Let type be the result of collecting a sequence
- // of code points that are not U+002F (/) from
- // input, given position.
- const type = collectASequenceOfCodePointsFast(
- '/',
- input,
- position
- )
-
- // 4. If type is the empty string or does not solely
- // contain HTTP token code points, then return failure.
- // https://mimesniff.spec.whatwg.org/#http-token-code-point
- if (type.length === 0 || !HTTP_TOKEN_CODEPOINTS.test(type)) {
- return 'failure'
- }
-
- // 5. If position is past the end of input, then return
- // failure
- if (position.position > input.length) {
- return 'failure'
- }
-
- // 6. Advance position by 1. (This skips past U+002F (/).)
- position.position++
-
- // 7. Let subtype be the result of collecting a sequence of
- // code points that are not U+003B (;) from input, given
- // position.
- let subtype = collectASequenceOfCodePointsFast(
- ';',
- input,
- position
- )
-
- // 8. Remove any trailing HTTP whitespace from subtype.
- subtype = removeHTTPWhitespace(subtype, false, true)
-
- // 9. If subtype is the empty string or does not solely
- // contain HTTP token code points, then return failure.
- if (subtype.length === 0 || !HTTP_TOKEN_CODEPOINTS.test(subtype)) {
- return 'failure'
- }
-
- const typeLowercase = type.toLowerCase()
- const subtypeLowercase = subtype.toLowerCase()
-
- // 10. Let mimeType be a new MIME type record whose type
- // is type, in ASCII lowercase, and subtype is subtype,
- // in ASCII lowercase.
- // https://mimesniff.spec.whatwg.org/#mime-type
- const mimeType = {
- type: typeLowercase,
- subtype: subtypeLowercase,
- /** @type {Map<string, string>} */
- parameters: new Map(),
- // https://mimesniff.spec.whatwg.org/#mime-type-essence
- essence: `${typeLowercase}/${subtypeLowercase}`
- }
-
- // 11. While position is not past the end of input:
- while (position.position < input.length) {
- // 1. Advance position by 1. (This skips past U+003B (;).)
- position.position++
-
- // 2. Collect a sequence of code points that are HTTP
- // whitespace from input given position.
- collectASequenceOfCodePoints(
- // https://fetch.spec.whatwg.org/#http-whitespace
- char => HTTP_WHITESPACE_REGEX.test(char),
- input,
- position
- )
-
- // 3. Let parameterName be the result of collecting a
- // sequence of code points that are not U+003B (;)
- // or U+003D (=) from input, given position.
- let parameterName = collectASequenceOfCodePoints(
- (char) => char !== ';' && char !== '=',
- input,
- position
- )
-
- // 4. Set parameterName to parameterName, in ASCII
- // lowercase.
- parameterName = parameterName.toLowerCase()
-
- // 5. If position is not past the end of input, then:
- if (position.position < input.length) {
- // 1. If the code point at position within input is
- // U+003B (;), then continue.
- if (input[position.position] === ';') {
- continue
- }
-
- // 2. Advance position by 1. (This skips past U+003D (=).)
- position.position++
- }
-
- // 6. If position is past the end of input, then break.
- if (position.position > input.length) {
- break
- }
-
- // 7. Let parameterValue be null.
- let parameterValue = null
-
- // 8. If the code point at position within input is
- // U+0022 ("), then:
- if (input[position.position] === '"') {
- // 1. Set parameterValue to the result of collecting
- // an HTTP quoted string from input, given position
- // and the extract-value flag.
- parameterValue = collectAnHTTPQuotedString(input, position, true)
-
- // 2. Collect a sequence of code points that are not
- // U+003B (;) from input, given position.
- collectASequenceOfCodePointsFast(
- ';',
- input,
- position
- )
-
- // 9. Otherwise:
- } else {
- // 1. Set parameterValue to the result of collecting
- // a sequence of code points that are not U+003B (;)
- // from input, given position.
- parameterValue = collectASequenceOfCodePointsFast(
- ';',
- input,
- position
- )
-
- // 2. Remove any trailing HTTP whitespace from parameterValue.
- parameterValue = removeHTTPWhitespace(parameterValue, false, true)
-
- // 3. If parameterValue is the empty string, then continue.
- if (parameterValue.length === 0) {
- continue
- }
- }
-
- // 10. If all of the following are true
- // - parameterName is not the empty string
- // - parameterName solely contains HTTP token code points
- // - parameterValue solely contains HTTP quoted-string token code points
- // - mimeType’s parameters[parameterName] does not exist
- // then set mimeType’s parameters[parameterName] to parameterValue.
- if (
- parameterName.length !== 0 &&
- HTTP_TOKEN_CODEPOINTS.test(parameterName) &&
- (parameterValue.length === 0 || HTTP_QUOTED_STRING_TOKENS.test(parameterValue)) &&
- !mimeType.parameters.has(parameterName)
- ) {
- mimeType.parameters.set(parameterName, parameterValue)
- }
- }
-
- // 12. Return mimeType.
- return mimeType
-}
-
-// https://infra.spec.whatwg.org/#forgiving-base64-decode
-/** @param {string} data */
-function forgivingBase64 (data) {
- // 1. Remove all ASCII whitespace from data.
- data = data.replace(/[\u0009\u000A\u000C\u000D\u0020]/g, '') // eslint-disable-line
-
- // 2. If data’s code point length divides by 4 leaving
- // no remainder, then:
- if (data.length % 4 === 0) {
- // 1. If data ends with one or two U+003D (=) code points,
- // then remove them from data.
- data = data.replace(/=?=$/, '')
- }
-
- // 3. If data’s code point length divides by 4 leaving
- // a remainder of 1, then return failure.
- if (data.length % 4 === 1) {
- return 'failure'
- }
-
- // 4. If data contains a code point that is not one of
- // U+002B (+)
- // U+002F (/)
- // ASCII alphanumeric
- // then return failure.
- if (/[^+/0-9A-Za-z]/.test(data)) {
- return 'failure'
- }
-
- const binary = atob(data)
- const bytes = new Uint8Array(binary.length)
-
- for (let byte = 0; byte < binary.length; byte++) {
- bytes[byte] = binary.charCodeAt(byte)
- }
-
- return bytes
-}
-
-// https://fetch.spec.whatwg.org/#collect-an-http-quoted-string
-// tests: https://fetch.spec.whatwg.org/#example-http-quoted-string
-/**
- * @param {string} input
- * @param {{ position: number }} position
- * @param {boolean?} extractValue
- */
-function collectAnHTTPQuotedString (input, position, extractValue) {
- // 1. Let positionStart be position.
- const positionStart = position.position
-
- // 2. Let value be the empty string.
- let value = ''
-
- // 3. Assert: the code point at position within input
- // is U+0022 (").
- assert(input[position.position] === '"')
-
- // 4. Advance position by 1.
- position.position++
-
- // 5. While true:
- while (true) {
- // 1. Append the result of collecting a sequence of code points
- // that are not U+0022 (") or U+005C (\) from input, given
- // position, to value.
- value += collectASequenceOfCodePoints(
- (char) => char !== '"' && char !== '\\',
- input,
- position
- )
-
- // 2. If position is past the end of input, then break.
- if (position.position >= input.length) {
- break
- }
-
- // 3. Let quoteOrBackslash be the code point at position within
- // input.
- const quoteOrBackslash = input[position.position]
-
- // 4. Advance position by 1.
- position.position++
-
- // 5. If quoteOrBackslash is U+005C (\), then:
- if (quoteOrBackslash === '\\') {
- // 1. If position is past the end of input, then append
- // U+005C (\) to value and break.
- if (position.position >= input.length) {
- value += '\\'
- break
- }
-
- // 2. Append the code point at position within input to value.
- value += input[position.position]
-
- // 3. Advance position by 1.
- position.position++
-
- // 6. Otherwise:
- } else {
- // 1. Assert: quoteOrBackslash is U+0022 (").
- assert(quoteOrBackslash === '"')
-
- // 2. Break.
- break
- }
- }
-
- // 6. If the extract-value flag is set, then return value.
- if (extractValue) {
- return value
- }
-
- // 7. Return the code points from positionStart to position,
- // inclusive, within input.
- return input.slice(positionStart, position.position)
-}
-
-/**
- * @see https://mimesniff.spec.whatwg.org/#serialize-a-mime-type
- */
-function serializeAMimeType (mimeType) {
- assert(mimeType !== 'failure')
- const { parameters, essence } = mimeType
-
- // 1. Let serialization be the concatenation of mimeType’s
- // type, U+002F (/), and mimeType’s subtype.
- let serialization = essence
-
- // 2. For each name → value of mimeType’s parameters:
- for (let [name, value] of parameters.entries()) {
- // 1. Append U+003B (;) to serialization.
- serialization += ';'
-
- // 2. Append name to serialization.
- serialization += name
-
- // 3. Append U+003D (=) to serialization.
- serialization += '='
-
- // 4. If value does not solely contain HTTP token code
- // points or value is the empty string, then:
- if (!HTTP_TOKEN_CODEPOINTS.test(value)) {
- // 1. Precede each occurence of U+0022 (") or
- // U+005C (\) in value with U+005C (\).
- value = value.replace(/(\\|")/g, '\\$1')
-
- // 2. Prepend U+0022 (") to value.
- value = '"' + value
-
- // 3. Append U+0022 (") to value.
- value += '"'
- }
-
- // 5. Append value to serialization.
- serialization += value
- }
-
- // 3. Return serialization.
- return serialization
-}
-
-/**
- * @see https://fetch.spec.whatwg.org/#http-whitespace
- * @param {string} char
- */
-function isHTTPWhiteSpace (char) {
- return char === '\r' || char === '\n' || char === '\t' || char === ' '
-}
-
-/**
- * @see https://fetch.spec.whatwg.org/#http-whitespace
- * @param {string} str
- */
-function removeHTTPWhitespace (str, leading = true, trailing = true) {
- let lead = 0
- let trail = str.length - 1
-
- if (leading) {
- for (; lead < str.length && isHTTPWhiteSpace(str[lead]); lead++);
- }
-
- if (trailing) {
- for (; trail > 0 && isHTTPWhiteSpace(str[trail]); trail--);
- }
-
- return str.slice(lead, trail + 1)
-}
-
-/**
- * @see https://infra.spec.whatwg.org/#ascii-whitespace
- * @param {string} char
- */
-function isASCIIWhitespace (char) {
- return char === '\r' || char === '\n' || char === '\t' || char === '\f' || char === ' '
-}
-
-/**
- * @see https://infra.spec.whatwg.org/#strip-leading-and-trailing-ascii-whitespace
- */
-function removeASCIIWhitespace (str, leading = true, trailing = true) {
- let lead = 0
- let trail = str.length - 1
-
- if (leading) {
- for (; lead < str.length && isASCIIWhitespace(str[lead]); lead++);
- }
-
- if (trailing) {
- for (; trail > 0 && isASCIIWhitespace(str[trail]); trail--);
- }
-
- return str.slice(lead, trail + 1)
-}
-
-module.exports = {
- dataURLProcessor,
- URLSerializer,
- collectASequenceOfCodePoints,
- collectASequenceOfCodePointsFast,
- stringPercentDecode,
- parseMIMEType,
- collectAnHTTPQuotedString,
- serializeAMimeType
-}