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Diffstat (limited to 'vanilla/node_modules/undici/lib/util/date.js')
| -rw-r--r-- | vanilla/node_modules/undici/lib/util/date.js | 653 |
1 files changed, 653 insertions, 0 deletions
diff --git a/vanilla/node_modules/undici/lib/util/date.js b/vanilla/node_modules/undici/lib/util/date.js new file mode 100644 index 0000000..99dd150 --- /dev/null +++ b/vanilla/node_modules/undici/lib/util/date.js @@ -0,0 +1,653 @@ +'use strict' + +/** + * @see https://www.rfc-editor.org/rfc/rfc9110.html#name-date-time-formats + * + * @param {string} date + * @returns {Date | undefined} + */ +function parseHttpDate (date) { + // Sun, 06 Nov 1994 08:49:37 GMT ; IMF-fixdate + // Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format + // Sunday, 06-Nov-94 08:49:37 GMT ; obsolete RFC 850 format + + switch (date[3]) { + case ',': return parseImfDate(date) + case ' ': return parseAscTimeDate(date) + default: return parseRfc850Date(date) + } +} + +/** + * @see https://httpwg.org/specs/rfc9110.html#preferred.date.format + * + * @param {string} date + * @returns {Date | undefined} + */ +function parseImfDate (date) { + if ( + date.length !== 29 || + date[4] !== ' ' || + date[7] !== ' ' || + date[11] !== ' ' || + date[16] !== ' ' || + date[19] !== ':' || + date[22] !== ':' || + date[25] !== ' ' || + date[26] !== 'G' || + date[27] !== 'M' || + date[28] !== 'T' + ) { + return undefined + } + + let weekday = -1 + if (date[0] === 'S' && date[1] === 'u' && date[2] === 'n') { // Sunday + weekday = 0 + } else if (date[0] === 'M' && date[1] === 'o' && date[2] === 'n') { // Monday + weekday = 1 + } else if (date[0] === 'T' && date[1] === 'u' && date[2] === 'e') { // Tuesday + weekday = 2 + } else if (date[0] === 'W' && date[1] === 'e' && date[2] === 'd') { // Wednesday + weekday = 3 + } else if (date[0] === 'T' && date[1] === 'h' && date[2] === 'u') { // Thursday + weekday = 4 + } else if (date[0] === 'F' && date[1] === 'r' && date[2] === 'i') { // Friday + weekday = 5 + } else if (date[0] === 'S' && date[1] === 'a' && date[2] === 't') { // Saturday + weekday = 6 + } else { + return undefined // Not a valid day of the week + } + + let day = 0 + if (date[5] === '0') { + // Single digit day, e.g. "Sun Nov 6 08:49:37 1994" + const code = date.charCodeAt(6) + if (code < 49 || code > 57) { + return undefined // Not a digit + } + day = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(5) + if (code1 < 49 || code1 > 51) { + return undefined // Not a digit between 1 and 3 + } + const code2 = date.charCodeAt(6) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + day = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + let monthIdx = -1 + if ( + (date[8] === 'J' && date[9] === 'a' && date[10] === 'n') + ) { + monthIdx = 0 // Jan + } else if ( + (date[8] === 'F' && date[9] === 'e' && date[10] === 'b') + ) { + monthIdx = 1 // Feb + } else if ( + (date[8] === 'M' && date[9] === 'a') + ) { + if (date[10] === 'r') { + monthIdx = 2 // Mar + } else if (date[10] === 'y') { + monthIdx = 4 // May + } else { + return undefined // Invalid month + } + } else if ( + (date[8] === 'J') + ) { + if (date[9] === 'a' && date[10] === 'n') { + monthIdx = 0 // Jan + } else if (date[9] === 'u') { + if (date[10] === 'n') { + monthIdx = 5 // Jun + } else if (date[10] === 'l') { + monthIdx = 6 // Jul + } else { + return undefined // Invalid month + } + } else { + return undefined // Invalid month + } + } else if ( + (date[8] === 'A') + ) { + if (date[9] === 'p' && date[10] === 'r') { + monthIdx = 3 // Apr + } else if (date[9] === 'u' && date[10] === 'g') { + monthIdx = 7 // Aug + } else { + return undefined // Invalid month + } + } else if ( + (date[8] === 'S' && date[9] === 'e' && date[10] === 'p') + ) { + monthIdx = 8 // Sep + } else if ( + (date[8] === 'O' && date[9] === 'c' && date[10] === 't') + ) { + monthIdx = 9 // Oct + } else if ( + (date[8] === 'N' && date[9] === 'o' && date[10] === 'v') + ) { + monthIdx = 10 // Nov + } else if ( + (date[8] === 'D' && date[9] === 'e' && date[10] === 'c') + ) { + monthIdx = 11 // Dec + } else { + // Not a valid month + return undefined + } + + const yearDigit1 = date.charCodeAt(12) + if (yearDigit1 < 48 || yearDigit1 > 57) { + return undefined // Not a digit + } + const yearDigit2 = date.charCodeAt(13) + if (yearDigit2 < 48 || yearDigit2 > 57) { + return undefined // Not a digit + } + const yearDigit3 = date.charCodeAt(14) + if (yearDigit3 < 48 || yearDigit3 > 57) { + return undefined // Not a digit + } + const yearDigit4 = date.charCodeAt(15) + if (yearDigit4 < 48 || yearDigit4 > 57) { + return undefined // Not a digit + } + const year = (yearDigit1 - 48) * 1000 + (yearDigit2 - 48) * 100 + (yearDigit3 - 48) * 10 + (yearDigit4 - 48) + + let hour = 0 + if (date[17] === '0') { + const code = date.charCodeAt(18) + if (code < 48 || code > 57) { + return undefined // Not a digit + } + hour = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(17) + if (code1 < 48 || code1 > 50) { + return undefined // Not a digit between 0 and 2 + } + const code2 = date.charCodeAt(18) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + if (code1 === 50 && code2 > 51) { + return undefined // Hour cannot be greater than 23 + } + hour = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + let minute = 0 + if (date[20] === '0') { + const code = date.charCodeAt(21) + if (code < 48 || code > 57) { + return undefined // Not a digit + } + minute = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(20) + if (code1 < 48 || code1 > 53) { + return undefined // Not a digit between 0 and 5 + } + const code2 = date.charCodeAt(21) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + minute = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + let second = 0 + if (date[23] === '0') { + const code = date.charCodeAt(24) + if (code < 48 || code > 57) { + return undefined // Not a digit + } + second = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(23) + if (code1 < 48 || code1 > 53) { + return undefined // Not a digit between 0 and 5 + } + const code2 = date.charCodeAt(24) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + second = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + const result = new Date(Date.UTC(year, monthIdx, day, hour, minute, second)) + return result.getUTCDay() === weekday ? result : undefined +} + +/** + * @see https://httpwg.org/specs/rfc9110.html#obsolete.date.formats + * + * @param {string} date + * @returns {Date | undefined} + */ +function parseAscTimeDate (date) { + // This is assumed to be in UTC + + if ( + date.length !== 24 || + date[7] !== ' ' || + date[10] !== ' ' || + date[19] !== ' ' + ) { + return undefined + } + + let weekday = -1 + if (date[0] === 'S' && date[1] === 'u' && date[2] === 'n') { // Sunday + weekday = 0 + } else if (date[0] === 'M' && date[1] === 'o' && date[2] === 'n') { // Monday + weekday = 1 + } else if (date[0] === 'T' && date[1] === 'u' && date[2] === 'e') { // Tuesday + weekday = 2 + } else if (date[0] === 'W' && date[1] === 'e' && date[2] === 'd') { // Wednesday + weekday = 3 + } else if (date[0] === 'T' && date[1] === 'h' && date[2] === 'u') { // Thursday + weekday = 4 + } else if (date[0] === 'F' && date[1] === 'r' && date[2] === 'i') { // Friday + weekday = 5 + } else if (date[0] === 'S' && date[1] === 'a' && date[2] === 't') { // Saturday + weekday = 6 + } else { + return undefined // Not a valid day of the week + } + + let monthIdx = -1 + if ( + (date[4] === 'J' && date[5] === 'a' && date[6] === 'n') + ) { + monthIdx = 0 // Jan + } else if ( + (date[4] === 'F' && date[5] === 'e' && date[6] === 'b') + ) { + monthIdx = 1 // Feb + } else if ( + (date[4] === 'M' && date[5] === 'a') + ) { + if (date[6] === 'r') { + monthIdx = 2 // Mar + } else if (date[6] === 'y') { + monthIdx = 4 // May + } else { + return undefined // Invalid month + } + } else if ( + (date[4] === 'J') + ) { + if (date[5] === 'a' && date[6] === 'n') { + monthIdx = 0 // Jan + } else if (date[5] === 'u') { + if (date[6] === 'n') { + monthIdx = 5 // Jun + } else if (date[6] === 'l') { + monthIdx = 6 // Jul + } else { + return undefined // Invalid month + } + } else { + return undefined // Invalid month + } + } else if ( + (date[4] === 'A') + ) { + if (date[5] === 'p' && date[6] === 'r') { + monthIdx = 3 // Apr + } else if (date[5] === 'u' && date[6] === 'g') { + monthIdx = 7 // Aug + } else { + return undefined // Invalid month + } + } else if ( + (date[4] === 'S' && date[5] === 'e' && date[6] === 'p') + ) { + monthIdx = 8 // Sep + } else if ( + (date[4] === 'O' && date[5] === 'c' && date[6] === 't') + ) { + monthIdx = 9 // Oct + } else if ( + (date[4] === 'N' && date[5] === 'o' && date[6] === 'v') + ) { + monthIdx = 10 // Nov + } else if ( + (date[4] === 'D' && date[5] === 'e' && date[6] === 'c') + ) { + monthIdx = 11 // Dec + } else { + // Not a valid month + return undefined + } + + let day = 0 + if (date[8] === ' ') { + // Single digit day, e.g. "Sun Nov 6 08:49:37 1994" + const code = date.charCodeAt(9) + if (code < 49 || code > 57) { + return undefined // Not a digit + } + day = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(8) + if (code1 < 49 || code1 > 51) { + return undefined // Not a digit between 1 and 3 + } + const code2 = date.charCodeAt(9) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + day = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + let hour = 0 + if (date[11] === '0') { + const code = date.charCodeAt(12) + if (code < 48 || code > 57) { + return undefined // Not a digit + } + hour = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(11) + if (code1 < 48 || code1 > 50) { + return undefined // Not a digit between 0 and 2 + } + const code2 = date.charCodeAt(12) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + if (code1 === 50 && code2 > 51) { + return undefined // Hour cannot be greater than 23 + } + hour = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + let minute = 0 + if (date[14] === '0') { + const code = date.charCodeAt(15) + if (code < 48 || code > 57) { + return undefined // Not a digit + } + minute = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(14) + if (code1 < 48 || code1 > 53) { + return undefined // Not a digit between 0 and 5 + } + const code2 = date.charCodeAt(15) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + minute = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + let second = 0 + if (date[17] === '0') { + const code = date.charCodeAt(18) + if (code < 48 || code > 57) { + return undefined // Not a digit + } + second = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(17) + if (code1 < 48 || code1 > 53) { + return undefined // Not a digit between 0 and 5 + } + const code2 = date.charCodeAt(18) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + second = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + const yearDigit1 = date.charCodeAt(20) + if (yearDigit1 < 48 || yearDigit1 > 57) { + return undefined // Not a digit + } + const yearDigit2 = date.charCodeAt(21) + if (yearDigit2 < 48 || yearDigit2 > 57) { + return undefined // Not a digit + } + const yearDigit3 = date.charCodeAt(22) + if (yearDigit3 < 48 || yearDigit3 > 57) { + return undefined // Not a digit + } + const yearDigit4 = date.charCodeAt(23) + if (yearDigit4 < 48 || yearDigit4 > 57) { + return undefined // Not a digit + } + const year = (yearDigit1 - 48) * 1000 + (yearDigit2 - 48) * 100 + (yearDigit3 - 48) * 10 + (yearDigit4 - 48) + + const result = new Date(Date.UTC(year, monthIdx, day, hour, minute, second)) + return result.getUTCDay() === weekday ? result : undefined +} + +/** + * @see https://httpwg.org/specs/rfc9110.html#obsolete.date.formats + * + * @param {string} date + * @returns {Date | undefined} + */ +function parseRfc850Date (date) { + let commaIndex = -1 + + let weekday = -1 + if (date[0] === 'S') { + if (date[1] === 'u' && date[2] === 'n' && date[3] === 'd' && date[4] === 'a' && date[5] === 'y') { + weekday = 0 // Sunday + commaIndex = 6 + } else if (date[1] === 'a' && date[2] === 't' && date[3] === 'u' && date[4] === 'r' && date[5] === 'd' && date[6] === 'a' && date[7] === 'y') { + weekday = 6 // Saturday + commaIndex = 8 + } + } else if (date[0] === 'M' && date[1] === 'o' && date[2] === 'n' && date[3] === 'd' && date[4] === 'a' && date[5] === 'y') { + weekday = 1 // Monday + commaIndex = 6 + } else if (date[0] === 'T') { + if (date[1] === 'u' && date[2] === 'e' && date[3] === 's' && date[4] === 'd' && date[5] === 'a' && date[6] === 'y') { + weekday = 2 // Tuesday + commaIndex = 7 + } else if (date[1] === 'h' && date[2] === 'u' && date[3] === 'r' && date[4] === 's' && date[5] === 'd' && date[6] === 'a' && date[7] === 'y') { + weekday = 4 // Thursday + commaIndex = 8 + } + } else if (date[0] === 'W' && date[1] === 'e' && date[2] === 'd' && date[3] === 'n' && date[4] === 'e' && date[5] === 's' && date[6] === 'd' && date[7] === 'a' && date[8] === 'y') { + weekday = 3 // Wednesday + commaIndex = 9 + } else if (date[0] === 'F' && date[1] === 'r' && date[2] === 'i' && date[3] === 'd' && date[4] === 'a' && date[5] === 'y') { + weekday = 5 // Friday + commaIndex = 6 + } else { + // Not a valid day name + return undefined + } + + if ( + date[commaIndex] !== ',' || + (date.length - commaIndex - 1) !== 23 || + date[commaIndex + 1] !== ' ' || + date[commaIndex + 4] !== '-' || + date[commaIndex + 8] !== '-' || + date[commaIndex + 11] !== ' ' || + date[commaIndex + 14] !== ':' || + date[commaIndex + 17] !== ':' || + date[commaIndex + 20] !== ' ' || + date[commaIndex + 21] !== 'G' || + date[commaIndex + 22] !== 'M' || + date[commaIndex + 23] !== 'T' + ) { + return undefined + } + + let day = 0 + if (date[commaIndex + 2] === '0') { + // Single digit day, e.g. "Sun Nov 6 08:49:37 1994" + const code = date.charCodeAt(commaIndex + 3) + if (code < 49 || code > 57) { + return undefined // Not a digit + } + day = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(commaIndex + 2) + if (code1 < 49 || code1 > 51) { + return undefined // Not a digit between 1 and 3 + } + const code2 = date.charCodeAt(commaIndex + 3) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + day = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + let monthIdx = -1 + if ( + (date[commaIndex + 5] === 'J' && date[commaIndex + 6] === 'a' && date[commaIndex + 7] === 'n') + ) { + monthIdx = 0 // Jan + } else if ( + (date[commaIndex + 5] === 'F' && date[commaIndex + 6] === 'e' && date[commaIndex + 7] === 'b') + ) { + monthIdx = 1 // Feb + } else if ( + (date[commaIndex + 5] === 'M' && date[commaIndex + 6] === 'a' && date[commaIndex + 7] === 'r') + ) { + monthIdx = 2 // Mar + } else if ( + (date[commaIndex + 5] === 'A' && date[commaIndex + 6] === 'p' && date[commaIndex + 7] === 'r') + ) { + monthIdx = 3 // Apr + } else if ( + (date[commaIndex + 5] === 'M' && date[commaIndex + 6] === 'a' && date[commaIndex + 7] === 'y') + ) { + monthIdx = 4 // May + } else if ( + (date[commaIndex + 5] === 'J' && date[commaIndex + 6] === 'u' && date[commaIndex + 7] === 'n') + ) { + monthIdx = 5 // Jun + } else if ( + (date[commaIndex + 5] === 'J' && date[commaIndex + 6] === 'u' && date[commaIndex + 7] === 'l') + ) { + monthIdx = 6 // Jul + } else if ( + (date[commaIndex + 5] === 'A' && date[commaIndex + 6] === 'u' && date[commaIndex + 7] === 'g') + ) { + monthIdx = 7 // Aug + } else if ( + (date[commaIndex + 5] === 'S' && date[commaIndex + 6] === 'e' && date[commaIndex + 7] === 'p') + ) { + monthIdx = 8 // Sep + } else if ( + (date[commaIndex + 5] === 'O' && date[commaIndex + 6] === 'c' && date[commaIndex + 7] === 't') + ) { + monthIdx = 9 // Oct + } else if ( + (date[commaIndex + 5] === 'N' && date[commaIndex + 6] === 'o' && date[commaIndex + 7] === 'v') + ) { + monthIdx = 10 // Nov + } else if ( + (date[commaIndex + 5] === 'D' && date[commaIndex + 6] === 'e' && date[commaIndex + 7] === 'c') + ) { + monthIdx = 11 // Dec + } else { + // Not a valid month + return undefined + } + + const yearDigit1 = date.charCodeAt(commaIndex + 9) + if (yearDigit1 < 48 || yearDigit1 > 57) { + return undefined // Not a digit + } + const yearDigit2 = date.charCodeAt(commaIndex + 10) + if (yearDigit2 < 48 || yearDigit2 > 57) { + return undefined // Not a digit + } + + let year = (yearDigit1 - 48) * 10 + (yearDigit2 - 48) // Convert ASCII codes to number + + // RFC 6265 states that the year is in the range 1970-2069. + // @see https://datatracker.ietf.org/doc/html/rfc6265#section-5.1.1 + // + // 3. If the year-value is greater than or equal to 70 and less than or + // equal to 99, increment the year-value by 1900. + // 4. If the year-value is greater than or equal to 0 and less than or + // equal to 69, increment the year-value by 2000. + year += year < 70 ? 2000 : 1900 + + let hour = 0 + if (date[commaIndex + 12] === '0') { + const code = date.charCodeAt(commaIndex + 13) + if (code < 48 || code > 57) { + return undefined // Not a digit + } + hour = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(commaIndex + 12) + if (code1 < 48 || code1 > 50) { + return undefined // Not a digit between 0 and 2 + } + const code2 = date.charCodeAt(commaIndex + 13) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + if (code1 === 50 && code2 > 51) { + return undefined // Hour cannot be greater than 23 + } + hour = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + let minute = 0 + if (date[commaIndex + 15] === '0') { + const code = date.charCodeAt(commaIndex + 16) + if (code < 48 || code > 57) { + return undefined // Not a digit + } + minute = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(commaIndex + 15) + if (code1 < 48 || code1 > 53) { + return undefined // Not a digit between 0 and 5 + } + const code2 = date.charCodeAt(commaIndex + 16) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + minute = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + let second = 0 + if (date[commaIndex + 18] === '0') { + const code = date.charCodeAt(commaIndex + 19) + if (code < 48 || code > 57) { + return undefined // Not a digit + } + second = code - 48 // Convert ASCII code to number + } else { + const code1 = date.charCodeAt(commaIndex + 18) + if (code1 < 48 || code1 > 53) { + return undefined // Not a digit between 0 and 5 + } + const code2 = date.charCodeAt(commaIndex + 19) + if (code2 < 48 || code2 > 57) { + return undefined // Not a digit + } + second = (code1 - 48) * 10 + (code2 - 48) // Convert ASCII codes to number + } + + const result = new Date(Date.UTC(year, monthIdx, day, hour, minute, second)) + return result.getUTCDay() === weekday ? result : undefined +} + +module.exports = { + parseHttpDate +} |