private const val DAMP = 700
  private const val INITIAL_BIAS = 72
  private const val INITIAL_N = 0x80

  /**
   * Returns null if any label is oversized so much that the encoder cannot encode it without
   * integer overflow. This will not return null for labels that fit within the DNS size
   * limits.
   */
  fun encode(string: String): String? {
    var pos = 0
    val limit = string.length

fun String.canParseAsIpAddress(): Boolean = VERIFY_AS_IP_ADDRESS.matches(this)

/**
 * Returns true if the length is not valid for DNS (empty or greater than 253 characters), or if any
 * label is longer than 63 characters. Trailing dots are okay.
 */
internal fun String.containsInvalidLabelLengths(): Boolean {
  if (length !in 1..253) return true

  var labelStart = 0
  while (true) {

  }

  @Test fun mixedCasePunycode() {
    testDecodeOnly(
      unicode = "ليهمابتكلموشعربي؟",
      punycode = "Xn--EgBpDaJ6Bu4bXfGeHfVwXn",
    )
  }

  /**
   * It's invalid to have a label longer than 63 characters. If that's requested, the encoder may
   * overflow and return null.
   */
  @Test fun overflowEncodingOversizedLabel() {
    val a1000 = "a".repeat(1000)

    // 1. Asterisk (*) is only permitted in the left-most domain name label and must be the
    //    only character in that label (i.e., must match the whole left-most label).
    //    For example, *.example.com is permitted, while *a.example.com, a*.example.com,
    //    a*b.example.com, a.*.example.com are not permitted.
    // 2. Asterisk (*) cannot match across domain name labels.

      writeShort(0) // additional

      val nameBuf = Buffer()
      val labels = host.split('.').dropLastWhile { it.isEmpty() }
      for (label in labels) {
        val utf8ByteCount = label.utf8Size()
        require(utf8ByteCount == label.length.toLong()) { "non-ascii hostname: $host" }
        nameBuf.writeByte(utf8ByteCount.toInt())
        nameBuf.writeUtf8(label)
      }
      nameBuf.writeByte(0) // end

      var certificatePem: String? = null
      var pkcs8Base64: String? = null
      for (match in PEM_REGEX.findAll(certificateAndPrivateKeyPem)) {
        when (val label = match.groups[1]!!.value) {
          "CERTIFICATE" -> {
            require(certificatePem == null) { "string includes multiple certificates" }

          if (publicSuffixByteIndex == publicSuffixLength) break

          if (labels[currentLabelIndex].size == currentLabelByteIndex) {
            // We've exhausted our current label. Either there are more labels to compare, in which
            // case we expect a dot as the next character. Otherwise, we've checked all our labels.
            if (currentLabelIndex == labels.size - 1) {
              break
            } else {

 *    no pinning will be enforced if additional prefixes are present, or if no prefixes are present.
 *
 * Note that any other form is unsupported. You may not use asterisks in any position other than
 * the leftmost label.
 *
 * If multiple patterns match a hostname, any match is sufficient. For example, suppose pin A
 * applies to `*.publicobject.com` and pin B applies to `api.publicobject.com`. Handshakes for

## Version 5.0.0-alpha.9

_2022-06-16_

 *  New: Enforce label length limits in URLs. `HttpUrl` now rejects URLs whose domains aren't valid.
    This includes overly-long domain names (longer than 253 characters), overly-long labels (more
    than 63 characters between dots), and empty labels.
 *  New: Don't include the `Content-Length` header in multipart bodies. Servers must delimit

---
name: Bug report
about: A reproducible problem
title: ''
labels: bug
assignees: ''

---

Good bug reports include a failing test! Writing a test helps you to isolate and describe the problem, and it helps us to fix it fast. Bug reports without a failing test or reproduction steps are likely to be closed.

Here’s an example test to get you started.