* most [BufferedSource] instances, but not of [Buffer].
   */
  private fun responseBody(content: String): ResponseBody {
    val data = Buffer().writeUtf8(content)
    val source: Source =
      object : Source {
        var closed = false

        override fun close() {
          closed = true
        }

        override fun read(
          sink: Buffer,

        }
      }
    }

  @JvmOverloads
  fun sendResponse(
    s: String,
    responseSent: CountDownLatch = CountDownLatch(0),
  ) = apply {
    actions += { stream ->
      stream.responseBody.writeUtf8(s)
      stream.responseBody.flush()
      responseSent.countDown()
    }
  }

  fun exhaustResponse() =
    apply {
      actions += { stream -> stream.responseBody.close() }
    }

  fun sleep(

   * most [BufferedSource] instances, but not of [Buffer].
   */
  private fun responseBody(content: String): ResponseBody {
    val data = Buffer().writeUtf8(content)
    val source: Source =
      object : Source {
        var closed = false

        override fun close() {
          closed = true
        }

        override fun read(
          sink: Buffer,

    return result.readUtf8()
  }

  private fun encodeLabel(
    string: String,
    pos: Int,
    limit: Int,
    result: Buffer,
  ): Boolean {
    if (!string.requiresEncode(pos, limit)) {
      result.writeUtf8(string, pos, limit)
      return true
    }

    result.write(PREFIX)

    val input = string.codePoints(pos, limit)

    // Copy all the basic code points to the output.
    var b = 0

  try {
    val certificateFactory = CertificateFactory.getInstance("X.509")
    val certificates =
      certificateFactory
        .generateCertificates(
          Buffer().writeUtf8(this).inputStream(),
        )

    return certificates.single() as X509Certificate
  } catch (nsee: NoSuchElementException) {
    throw IllegalArgumentException("failed to decode certificate", nsee)

      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

      nameBuf.copyTo(this, 0, nameBuf.size)
      writeShort(type)
      writeShort(1) // CLASS_IN
    }.readByteString()

  @Throws(Exception::class)

        val utf8 = IDENTITY.encode(codePoint).encodeUtf8()
        val percentEncoded = Buffer()
        for (i in 0 until utf8.size) {
          percentEncoded.writeUtf8("%")
            .writeUtf8(ByteString.of(utf8[i]).hex().uppercase())
        }
        return percentEncoded.readUtf8()
      }
    },

    /** URLs that contain this character in this component are invalid.  */

    }
  }

  private inline fun <T> assertOnPath(
    content: String? = null,
    fn: (okio.Path) -> T,
  ): T {
    FileSystem.SYSTEM.write(filePath) {
      if (content != null) {
        writeUtf8(content)
      }
    }

    return fn(filePath)
  }

          override fun contentType() = MEDIA_TYPE_MARKDOWN

          override fun writeTo(sink: BufferedSink) {
            sink.writeUtf8("Numbers\n")
            sink.writeUtf8("-------\n")
            for (i in 2..997) {
              sink.writeUtf8(String.format(" * $i = ${factor(i)}\n"))
            }
          }

          private fun factor(n: Int): String {
            for (i in 2 until n) {

          i++
        }

        list += element
      }
      return list
    }

    private fun unescape(s: String): String {
      return buildString {
        val buffer = Buffer().writeUtf8(s)
        while (!buffer.exhausted()) {
          val c = buffer.readUtf8CodePoint()
          if (c != '\\'.code) {
            append(c.toChar())
            continue
          }