// Case 4: bytes=-30 (suffix length specification) -> RangeSpec{true, -30, -1}
type HTTPRangeSpec struct {
	// Does the range spec refer to a suffix of the object?
	IsSuffixLength bool

	// Start and end offset specified in range spec
	Start, End int64
}

// GetLength - get length of range
func (h *HTTPRangeSpec) GetLength(resourceSize int64) (rangeLength int64, err error) {
	switch {

* HTTP/2 - [RFC 9113](https://datatracker.ietf.org/doc/html/rfc9113)
* Websockets - [RFC 6455](https://datatracker.ietf.org/doc/html/rfc6455)
* SSE - [Server-sent events](https://html.spec.whatwg.org/multipage/server-sent-events.html#server-sent-events)

Where the spec is ambiguous, OkHttp follows modern user agents such as popular Browsers or common HTTP Libraries.

  constructor(name: ByteString, value: String) : this(name, value.encodeUtf8())

  override fun toString(): String = "${name.utf8()}: ${value.utf8()}"

  companion object {
    // Special header names defined in HTTP/2 spec.
    @JvmField val PSEUDO_PREFIX: ByteString = ":".encodeUtf8()

    const val RESPONSE_STATUS_UTF8 = ":status"
    const val TARGET_METHOD_UTF8 = ":method"
    const val TARGET_PATH_UTF8 = ":path"

    // Valid radix values are Character.MIN_RADIX to Character.MAX_RADIX,
    // inclusive.
    //
    // Note: According to the spec, a NumberFormatException is thrown for a number that is not
    // parseable, but the spec doesn't seem to say which exception is thrown for an invalid radix.
    // In contrast to the JVM, Kotlin native throws an Illegal argument exception in this case

Наприклад, один зі способів використання специфікації OAuth2 (так званий "password flow") вимагає надсилати `username` та `password` як поля форми.

<abbr title="Специфікація">spec</abbr> вимагає, щоб ці поля мали точні назви `username` і `password` та надсилалися у вигляді полів форми, а не JSON.

   *
   * @since 12.0
   */
  @GwtIncompatible // To be supported
  public static CacheBuilder<Object, Object> from(CacheBuilderSpec spec) {
    return spec.toCacheBuilder().lenientParsing();
  }

  /**
   * Constructs a new {@code CacheBuilder} instance with the settings specified in {@code spec}.

     * resolution is not complete when this visitor is executed.
     */
    private
    fun isIntegrationTest(current: ClassNode) = current.name.endsWith("Test")
        || current.name.endsWith("Spec")

    override fun shouldVisitMethod(node: MethodNode): Boolean = isIntegrationTest(node.declaringClass)

    override fun visitMethodCallExpression(mce: MethodCallExpression) {

import assertk.assertions.isEqualTo
import assertk.assertions.isNull
import assertk.assertions.matches
import java.math.BigInteger
import java.security.KeyFactory
import java.security.spec.PKCS8EncodedKeySpec
import java.security.spec.X509EncodedKeySpec
import java.util.concurrent.TimeUnit
import okhttp3.testing.PlatformRule
import okhttp3.tls.HeldCertificate.Companion.decode
import okio.ByteString.Companion.decodeBase64

Например, в одном из способов использования спецификации OAuth2 (называемом «потоком пароля») требуется отправить `username` и `password` в виде полей формы.

<abbr title="specification – спецификация">spec</abbr> требует, чтобы поля были строго названы `username` и `password` и отправлялись как поля формы, а не JSON.

     * resolution is not complete when this visitor is executed.
     */
    private boolean isIntegrationTest(ClassNode current) {
        return current.getName().endsWith("Test") || current.getName().endsWith("Spec");
    }

    @Override
    protected boolean shouldVisitMethod(MethodNode node) {
        return isIntegrationTest(node.getDeclaringClass());
    }

    @Override