* limitations under the License.
 */
package okhttp3.internal.idn

import kotlin.math.abs
import okio.ByteString

internal sealed interface MappedRange {
  val rangeStart: Int

  data class Constant(
    override val rangeStart: Int,
    val type: Int,
  ) : MappedRange {
    val b1: Int
      get() =
        when (type) {
          TYPE_IGNORED -> 119
          TYPE_VALID -> 120

 *  New: Add `cacheHit`, `cacheMiss`, and `cacheConditionalHit()` events to `EventListener`. Use
    these in logs, metrics, and even test cases to confirm your cache headers are configured as
    expected.

 *  New: Constant string `okhttp3.VERSION`. This is a string like "4.5.0-RC1", "4.5.0", or
    "4.6.0-SNAPSHOT" indicating the version of OkHttp in the current runtime. Use this to include
    the OkHttp version in custom `User-Agent` headers.

We can't rely on application threads to read data from the socket. Application threads are transient: sometimes they're reading and writing and sometimes they're off doing application-layer things. But the socket is permanent, and it needs constant attention: we dispatch all incoming frames so the connection is good-to-go when the application layer needs it.

So we have a dedicated thread for every socket that just reads frames and dispatches them.

    sectionIndexBuffer.writeByte(sectionOffset and 0x7f)

    // Ranges.
    for (range in sectionMappedRanges) {
      rangesBuffer.writeByte(range.rangeStart)

      when (range) {
        is MappedRange.Constant -> {
          rangesBuffer.writeByte(range.b1)
          rangesBuffer.writeByte('-'.code)
          rangesBuffer.writeByte('-'.code)
        }
        is MappedRange.Inline1 -> {

      FileInputStream(filePath.toFile()).use { fis ->
        fn(fis.fd)
      }
    }
  }

  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)
  }

       *
       * Example:
       * ```
       * --> POST /greeting http/1.1
       * Host: example.com
       * Content-Type: plain/text
       * Content-Length: 3
       * --> END POST
       *
       * <-- 200 OK (22ms)
       * Content-Type: plain/text
       * Content-Length: 6
       * <-- END HTTP
       * ```
       */
      HEADERS,

      /**

      return new MockResponse()
          .setStatus("HTTP/1.1 404")
          .addHeader("content-type: text/plain; charset=utf-8")
          .setBody("NOT FOUND: " + path);
    } catch (IOException e) {
      return new MockResponse()
          .setStatus("HTTP/1.1 500")
          .addHeader("content-type: text/plain; charset=utf-8")
          .setBody("SERVER ERROR: " + e);
    }
  }

import okhttp3.MediaType.Companion.toMediaTypeOrNull
import okhttp3.ResponseBody
import okio.BufferedSource

class RealResponseBody(
  /**
   * Use a string to avoid parsing the content type until needed. This also defers problems caused
   * by malformed content types.
   */
  private val contentTypeString: String?,
  private val contentLength: Long,
  private val source: BufferedSource,
) : ResponseBody() {

   * content to go along with it. https://github.com/square/okhttp/issues/358
   */
  @Test
  fun noTransparentGzipFor304NotModified() {
    server.enqueue(
      MockResponse.Builder()
        .clearHeaders()
        .code(HttpURLConnection.HTTP_NOT_MODIFIED)
        .addHeader("Content-Encoding: gzip")
        .build(),
    )

          return Buffer().writeUtf8("hello")
        }
      }
    assertFailsWith<IOException> {
      body.bytes()
    }.also { expected ->
      assertThat(expected.message).isEqualTo(
        "Content-Length (10) and stream length (5) disagree",
      )
    }
  }

  @Test
  fun bytesThrowsMoreThanIntMaxValue() {
    val body: ResponseBody =
      object : ResponseBody() {