Function getDecodeAndSplit

lib/jsdom/living/fetch/header-types.js:140–196

(input)

// https://fetch.spec.whatwg.org/#header-value-get-decode-and-split
function getDecodeAndSplit(input) {
  const values = [];
  let temporaryValue = "";
  let position = 0;

  while (true) {
    // Collect sequence of code points that are not " or ,
    while (position < input.length && input[position] !== "\"" && input[position] !== ",") {
      temporaryValue += input[position++];
    }

    // If position is not past end and code point is "
    if (position < input.length && input[position] === '"') {
      // Inlined: collect HTTP quoted string (extract-value = false)
      const positionStart = position++;
      while (true) {
        while (position < input.length && input[position] !== "\"" && input[position] !== "\\") {
          position++;
        }
        if (position >= input.length) {
          break;
        }
        if (input[position++] === "\\") {
          if (position >= input.length) {
            break;
          }
          position++;
        } else {
          break; // It was "
        }
      }
      temporaryValue += input.slice(positionStart, position);
      if (position < input.length) {
        continue;
      }
    }

    // Remove HTTP tab or space from start and end
    let start = 0;
    let end = temporaryValue.length;
    while (start < end && (temporaryValue[start] === "\t" || temporaryValue[start] === " ")) {
      start++;
    }
    while (end > start && (temporaryValue[end - 1] === "\t" || temporaryValue[end - 1] === " ")) {
      end--;
    }

    values.push(temporaryValue.slice(start, end));
    temporaryValue = "";

    if (position >= input.length) {
      return values;
    }
    // Assert: code point at position is ,
    position++;
  }
}