heldCertificate: HeldCertificate?,
    vararg intermediates: X509Certificate,
  ): X509KeyManager {
    val keyStore = newEmptyKeyStore(keyStoreType)
    if (heldCertificate != null) {
      val chain = arrayOfNulls<Certificate>(1 + intermediates.size)
      chain[0] = heldCertificate.certificate
      intermediates.copyInto(chain, 1)
      keyStore.setKeyEntry("private", heldCertificate.keyPair.private, password, chain)
    }

      "WINDOW_UPDATE",
      "CONTINUATION",
    )

  /**
   * Lookup table for valid flags for DATA, HEADERS, CONTINUATION. Invalid combinations are
   * represented in binary.
   */
  private val FLAGS = arrayOfNulls<String>(0x40) // Highest bit flag is 0x20.
  private val BINARY =
    Array(256) {
      format("%8s", Integer.toBinaryString(it)).replace(' ', '0')
    }

  init {
    FLAGS[FLAG_NONE] = ""

    "EEE, dd-MM-yyyy HH:mm:ss z",
    // RI bug 6641315 claims a cookie of this format was once served by www.yahoo.com:
    "EEE MMM d yyyy HH:mm:ss z",
  )

private val BROWSER_COMPATIBLE_DATE_FORMATS =
  arrayOfNulls<DateFormat>(BROWSER_COMPATIBLE_DATE_FORMAT_STRINGS.size)

/** Returns the date for this string, or null if the value couldn't be parsed. */
fun String.toHttpDateOrNull(): Date? {
  if (isEmpty()) return null

  }

  return Headers(namesAndValues)
}

internal fun Map<String, String>.commonToHeaders(): Headers {
  // Make a defensive copy and clean it up.
  val namesAndValues = arrayOfNulls<String>(size * 2)
  var i = 0
  for ((k, v) in this) {
    val name = k.trim()
    val value = v.trim()
    headersCheckName(name)
    headersCheckValue(value, name)
    namesAndValues[i] = name