初始化

2025-12-12 15:54:04 +08:00
commit 83a8a3bb9a
2404 changed files with 508391 additions and 0 deletions
--- a/node_modules/undici/lib/util/date.js
+++ b/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
+}