Function gettingDecodingSplitting

lib/web/fetch/util.js:1355–1415

* @see https://fetch.spec.whatwg.org/#header-value-get-decode-and-split * @param {string|null} value

(value)

 * @param {string|null} value
 */
function gettingDecodingSplitting (value) {
  // 1. Let input be the result of isomorphic decoding value.
  const input = value

  // 2. Let position be a position variable for input, initially pointing at the start of input.
  const position = { position: 0 }

  // 3. Let values be a list of strings, initially empty.
  const values = []

  // 4. Let temporaryValue be the empty string.
  let temporaryValue = ''

  // 5. While position is not past the end of input:
  while (position.position < input.length) {
    // 5.1. Append the result of collecting a sequence of code points that are not U+0022 (")
    //      or U+002C (,) from input, given position, to temporaryValue.
    temporaryValue += collectASequenceOfCodePoints(
      (char) => char !== '"' && char !== ',',
      input,
      position
    )

    // 5.2. If position is not past the end of input, then:
    if (position.position < input.length) {
      // 5.2.1. If the code point at position within input is U+0022 ("), then:
      if (input.charCodeAt(position.position) === 0x22) {
        // 5.2.1.1. Append the result of collecting an HTTP quoted string from input, given position, to temporaryValue.
        temporaryValue += collectAnHTTPQuotedString(
          input,
          position
        )

        // 5.2.1.2. If position is not past the end of input, then continue.
        if (position.position < input.length) {
          continue
        }
      } else {
        // 5.2.2. Otherwise:

        // 5.2.2.1. Assert: the code point at position within input is U+002C (,).
        assert(input.charCodeAt(position.position) === 0x2C)

        // 5.2.2.2. Advance position by 1.
        position.position++
      }
    }

    // 5.3. Remove all HTTP tab or space from the start and end of temporaryValue.
    temporaryValue = removeChars(temporaryValue, true, true, (char) => char === 0x9 || char === 0x20)

    // 5.4. Append temporaryValue to values.
    values.push(temporaryValue)

    // 5.6. Set temporaryValue to the empty string.
    temporaryValue = ''
  }