diff options
Diffstat (limited to 'vanilla/node_modules/undici/lib/web/fetch/data-url.js')
| -rw-r--r-- | vanilla/node_modules/undici/lib/web/fetch/data-url.js | 596 |
1 files changed, 0 insertions, 596 deletions
diff --git a/vanilla/node_modules/undici/lib/web/fetch/data-url.js b/vanilla/node_modules/undici/lib/web/fetch/data-url.js deleted file mode 100644 index 27ad7ae..0000000 --- a/vanilla/node_modules/undici/lib/web/fetch/data-url.js +++ /dev/null @@ -1,596 +0,0 @@ -'use strict' - -const assert = require('node:assert') -const { forgivingBase64, collectASequenceOfCodePoints, collectASequenceOfCodePointsFast, isomorphicDecode, removeASCIIWhitespace, removeChars } = require('../infra') - -const encoder = new TextEncoder() - -/** - * @see https://mimesniff.spec.whatwg.org/#http-token-code-point - */ -const HTTP_TOKEN_CODEPOINTS = /^[-!#$%&'*+.^_|~A-Za-z0-9]+$/u -const HTTP_WHITESPACE_REGEX = /[\u000A\u000D\u0009\u0020]/u // 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]+$/u // eslint-disable-line - -// https://fetch.spec.whatwg.org/#data-url-processor -/** @param {URL} dataURL */ -function dataURLProcessor (dataURL) { - // 1. Assert: dataURL’s scheme is "data". - assert(dataURL.protocol === 'data:') - - // 2. Let input be the result of running the URL - // serializer on dataURL with exclude fragment - // set to true. - let input = URLSerializer(dataURL, true) - - // 3. Remove the leading "data:" string from input. - input = input.slice(5) - - // 4. Let position point at the start of input. - const position = { position: 0 } - - // 5. Let mimeType be the result of collecting a - // sequence of code points that are not equal - // to U+002C (,), given position. - let mimeType = collectASequenceOfCodePointsFast( - ',', - input, - position - ) - - // 6. Strip leading and trailing ASCII whitespace - // from mimeType. - // Undici implementation note: we need to store the - // length because if the mimetype has spaces removed, - // the wrong amount will be sliced from the input in - // step #9 - const mimeTypeLength = mimeType.length - mimeType = removeASCIIWhitespace(mimeType, true, true) - - // 7. If position is past the end of input, then - // return failure - if (position.position >= input.length) { - return 'failure' - } - - // 8. Advance position by 1. - position.position++ - - // 9. Let encodedBody be the remainder of input. - const encodedBody = input.slice(mimeTypeLength + 1) - - // 10. Let body be the percent-decoding of encodedBody. - let body = stringPercentDecode(encodedBody) - - // 11. If mimeType ends with U+003B (;), followed by - // zero or more U+0020 SPACE, followed by an ASCII - // case-insensitive match for "base64", then: - if (/;(?:\u0020*)base64$/ui.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+)$/u, '') - - // 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) { - if (!excludeFragment) { - return url.href - } - - const href = url.href - const hashLength = url.hash.length - - const serialized = hashLength === 0 ? href : href.substring(0, href.length - hashLength) - - if (!hashLength && href.endsWith('#')) { - return serialized.slice(0, -1) - } - - return serialized -} - -// 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) -} - -/** - * @param {number} byte - */ -function isHexCharByte (byte) { - // 0-9 A-F a-f - return (byte >= 0x30 && byte <= 0x39) || (byte >= 0x41 && byte <= 0x46) || (byte >= 0x61 && byte <= 0x66) -} - -/** - * @param {number} byte - */ -function hexByteToNumber (byte) { - return ( - // 0-9 - byte >= 0x30 && byte <= 0x39 - ? (byte - 48) - // Convert to uppercase - // ((byte & 0xDF) - 65) + 10 - : ((byte & 0xDF) - 55) - ) -} - -// https://url.spec.whatwg.org/#percent-decode -/** @param {Uint8Array} input */ -function percentDecode (input) { - const length = input.length - // 1. Let output be an empty byte sequence. - /** @type {Uint8Array} */ - const output = new Uint8Array(length) - let j = 0 - let i = 0 - // 2. For each byte byte in input: - while (i < length) { - const byte = input[i] - - // 1. If byte is not 0x25 (%), then append byte to output. - if (byte !== 0x25) { - output[j++] = 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 && - !(isHexCharByte(input[i + 1]) && isHexCharByte(input[i + 2])) - ) { - output[j++] = 0x25 - - // 3. Otherwise: - } else { - // 1. Let bytePoint be the two bytes after byte in input, - // decoded, and then interpreted as hexadecimal number. - // 2. Append a byte whose value is bytePoint to output. - output[j++] = (hexByteToNumber(input[i + 1]) << 4) | hexByteToNumber(input[i + 2]) - - // 3. Skip the next two bytes in input. - i += 2 - } - ++i - } - - // 3. Return output. - return length === j ? output : output.subarray(0, j) -} - -// 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://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=false] - */ -function collectAnHTTPQuotedString (input, position, extractValue = false) { - // 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 occurrence of U+0022 (") or - // U+005C (\) in value with U+005C (\). - value = value.replace(/[\\"]/ug, '\\$&') - - // 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 {number} char - */ -function isHTTPWhiteSpace (char) { - // "\r\n\t " - return char === 0x00d || char === 0x00a || char === 0x009 || char === 0x020 -} - -/** - * @see https://fetch.spec.whatwg.org/#http-whitespace - * @param {string} str - * @param {boolean} [leading=true] - * @param {boolean} [trailing=true] - */ -function removeHTTPWhitespace (str, leading = true, trailing = true) { - return removeChars(str, leading, trailing, isHTTPWhiteSpace) -} - -/** - * @see https://mimesniff.spec.whatwg.org/#minimize-a-supported-mime-type - * @param {Exclude<ReturnType<typeof parseMIMEType>, 'failure'>} mimeType - */ -function minimizeSupportedMimeType (mimeType) { - switch (mimeType.essence) { - case 'application/ecmascript': - case 'application/javascript': - case 'application/x-ecmascript': - case 'application/x-javascript': - case 'text/ecmascript': - case 'text/javascript': - case 'text/javascript1.0': - case 'text/javascript1.1': - case 'text/javascript1.2': - case 'text/javascript1.3': - case 'text/javascript1.4': - case 'text/javascript1.5': - case 'text/jscript': - case 'text/livescript': - case 'text/x-ecmascript': - case 'text/x-javascript': - // 1. If mimeType is a JavaScript MIME type, then return "text/javascript". - return 'text/javascript' - case 'application/json': - case 'text/json': - // 2. If mimeType is a JSON MIME type, then return "application/json". - return 'application/json' - case 'image/svg+xml': - // 3. If mimeType’s essence is "image/svg+xml", then return "image/svg+xml". - return 'image/svg+xml' - case 'text/xml': - case 'application/xml': - // 4. If mimeType is an XML MIME type, then return "application/xml". - return 'application/xml' - } - - // 2. If mimeType is a JSON MIME type, then return "application/json". - if (mimeType.subtype.endsWith('+json')) { - return 'application/json' - } - - // 4. If mimeType is an XML MIME type, then return "application/xml". - if (mimeType.subtype.endsWith('+xml')) { - return 'application/xml' - } - - // 5. If mimeType is supported by the user agent, then return mimeType’s essence. - // Technically, node doesn't support any mimetypes. - - // 6. Return the empty string. - return '' -} - -module.exports = { - dataURLProcessor, - URLSerializer, - stringPercentDecode, - parseMIMEType, - collectAnHTTPQuotedString, - serializeAMimeType, - removeHTTPWhitespace, - minimizeSupportedMimeType, - HTTP_TOKEN_CODEPOINTS -} |