Function string2byteString

src/background/utils/requests-core.js:190–194

* Returns a UTF8-encoded binary string i.e. one byte per character. * Returns the original string in case it was already within ASCII.

(str)

 * Returns the original string in case it was already within ASCII.
 */
function string2byteString(str) {
  if (!/[\u0080-\uFFFF]/.test(str)) return str;
  if (!encoder) encoder = new TextEncoder();
  return buffer2string(encoder.encode(str));
}

// Chrome 74-91 needs an extraHeaders listener at tab load start, https://crbug.com/1074282
// We're attaching a no-op in non-blocking mode so it's very lightweight and fast.