*
   * [rfc_5208]: https://tools.ietf.org/html/rfc5208
   * [rfc_7468]: https://tools.ietf.org/html/rfc7468
   */
  fun privateKeyPkcs8Pem(): String {
    return buildString {
      append("-----BEGIN PRIVATE KEY-----\n")
      encodeBase64Lines(keyPair.private.encoded.toByteString())
      append("-----END PRIVATE KEY-----\n")
    }
  }

  /**

   * [HttpURLConnection.getHeaderFields], so it needs to be set even if the transport is
   * HTTP/2.
   */
  fun get(
    request: Request,
    proxyType: Proxy.Type,
  ): String =
    buildString {
      append(request.method)
      append(' ')
      if (includeAuthorityInRequestLine(request, proxyType)) {
        append(request.url)
      } else {
        append(requestPath(request.url))
      }

  }
}

/**
 * Returns the certificate encoded in [PEM format][rfc_7468].
 *
 * [rfc_7468]: https://tools.ietf.org/html/rfc7468
 */
fun X509Certificate.certificatePem(): String {
  return buildString {
    append("-----BEGIN CERTIFICATE-----\n")
    encodeBase64Lines(encoded.toByteString())
    append("-----END CERTIFICATE-----\n")
  }
}

internal fun StringBuilder.encodeBase64Lines(data: ByteString) {

}

/**
 * KotlinPoet doesn't really know what to do with a string containing NUL, BEL, DEL, etc. We also
 * don't want to perform `trimMargin()` at runtime.
 */
fun String.escapeDataString(): String {
  return buildString {
    for (codePoint in ******@****.***ints()) {
      when (codePoint) {
        in 0..0x20,
        '"'.code,
        '$'.code,
        '\\'.code,
        '·'.code,
        127,

      val responseBody = response.body!!
      val contentLength = responseBody.contentLength()
      val bodySize = if (contentLength != -1L) "$contentLength-byte" else "unknown-length"
      logger.log(
        buildString {
          append("<-- ${response.code}")
          if (response.message.isNotEmpty()) append(" ${response.message}")
          append(" ${redactUrl(response.request.url)} (${tookMs}ms")

          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

      }
    }

    return responseBuilder.build()
  }

  /** Returns a 'Cookie' HTTP request header with all cookies, like `a=b; c=d`. */
  private fun cookieHeader(cookies: List<Cookie>): String =
    buildString {
      cookies.forEachIndexed { index, cookie ->
        if (index > 0) append("; ")
        append(cookie.name).append('=').append(cookie.value)
      }
    }

        else -> tags as MutableMap<KClass<*>, Any>
      }
    mutableTags[type] = tag
  }
}

fun Request.commonToString(): String =
  buildString {
    append("Request{method=")
    append(method)
    append(", url=")
    append(url)
    if (headers.size != 0) {
      append(", headers=[")
      headers.forEachIndexed { index, (name, value) ->

class StatusLine(
  @JvmField val protocol: Protocol,
  @JvmField val code: Int,
  @JvmField val message: String,
) {
  override fun toString(): String {
    return buildString {
      if (protocol == Protocol.HTTP_1_0) {
        append("HTTP/1.0")
      } else {
        append("HTTP/1.1")
      }
      append(' ').append(code)
      append(' ').append(message)
    }
  }

   *
   *  * `example.com:80 at 1.2.3.4:8888`
   *  * `example.com:443 via proxy [::1]:8888`
   *
   * This omits duplicate information when possible.
   */
  override fun toString(): String {
    return buildString {
      val addressHostname = address.url.host // Already in canonical form.
      val socketHostname = socketAddress.address?.hostAddress?.toCanonicalHost()

      when {