assertThat(recorded.headers["Connection"]).isEqualTo("Upgrade, HTTP2-Settings")
    if (PlatformVersion.majorVersion < 19) {
      assertThat(recorded.headers["Content-Length"]).isEqualTo("0")
    }
    assertThat(recorded.headers["HTTP2-Settings"]).isNotNull()
    assertThat(recorded.headers["Upgrade"]).isEqualTo("h2c") // HTTP/2 over plaintext!

    - [Server binaries](#server-binaries-7)
    - [Node binaries](#node-binaries-7)
  - [Changelog since v1.17.8](#changelog-since-v1178)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind-8)
    - [Bug or Regression](#bug-or-regression-7)
  - [Dependencies](#dependencies-8)
    - [Added](#added-8)

      )
    }

    val headerConnection = response.header("Connection")
    if (!"Upgrade".equals(headerConnection, ignoreCase = true)) {
      throw ProtocolException(
        "Expected 'Connection' header value 'Upgrade' but was '$headerConnection'",
      )
    }

    val headerUpgrade = response.header("Upgrade")
    if (!"websocket".equals(headerUpgrade, ignoreCase = true)) {
      throw ProtocolException(

      this.settings = settings
    }

  fun withWebSocketUpgrade(listener: WebSocketListener) =
    apply {
      status = "HTTP/1.1 101 Switching Protocols"
      setHeader("Connection", "Upgrade")
      setHeader("Upgrade", "websocket")
      body = null
      webSocketListener = listener
    }

  override fun toString(): String = status

  companion object {

    - [Node Binaries](#node-binaries-12)
    - [Container Images](#container-images-12)
  - [Changelog since v1.30.0](#changelog-since-v1300)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind-12)
    - [Deprecation](#deprecation-1)
    - [API Change](#api-change-2)
    - [Feature](#feature-8)

    - [Node Binaries](#node-binaries-4)
    - [Container Images](#container-images-4)
  - [Changelog since v1.32.0](#changelog-since-v1320)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind-4)
    - [Deprecation](#deprecation)
    - [API Change](#api-change-1)
    - [Feature](#feature-2)

  /** The HTTP {@code Upgrade} header field name. */
  public static final String UPGRADE = "Upgrade";

  /**
   * The HTTP <a href="https://w3c.github.io/webappsec-upgrade-insecure-requests/#preference">{@code
   * Upgrade-Insecure-Requests}</a> header field name.
   *
   * @since 28.1
   */
  public static final String UPGRADE_INSECURE_REQUESTS = "Upgrade-Insecure-Requests";

errors.no_user_for_changing_password=Das aktuelle Passwort ist nicht korrekt.
errors.failed_to_change_password=Fehler beim Ändern Ihres Passworts.
errors.unknown_version_for_upgrade=Unbekannte Version für Upgrade.
errors.failed_to_upgrade_from=Fehler beim Upgrade von {0}.
errors.failed_to_reindex=Fehler beim Starten der Neuindizierung von {0} nach {1}.
errors.failed_to_read_request_file=Fehler beim Lesen einer Anforderungsdatei: {0}

          else -> "GET"
        },
        body,
      ),
  )

  init {
    val connectionHeader = headers["Connection"]
    require(body == null || !"upgrade".equals(connectionHeader, ignoreCase = true)) {
      "expected a null request body with 'Connection: upgrade'"
    }
  }

  fun header(name: String): String? = headers[name]

  fun headers(name: String): List<String> = headers.values(name)

    - [Avoiding Collisions in IP allocation to Services](#avoiding-collisions-in-ip-allocation-to-services)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind-17)
    - [Deprecation](#deprecation)
    - [API Change](#api-change-4)
    - [Feature](#feature-15)