Slawomir Jaranowski <******@****.***> 1694625617 +0200

```
[2020-01-01 00:00:00] Q10000 scheduled after   0 µs: OkHttp ConnectionPool
[2020-01-01 00:00:00] Q10000 starting              : OkHttp ConnectionPool
[2020-01-01 00:00:00] Q10000 run again after 300 s : OkHttp ConnectionPool
[2020-01-01 00:00:00] Q10000 finished run in   1 ms: OkHttp ConnectionPool
[2020-01-01 00:00:00] Q10001 scheduled after   0 µs: OkHttp squareup.com applyAndAckSettings

 * limitations under the License.
 */
package okhttp3.mockwebserver

enum class SocketPolicy {
  SHUTDOWN_SERVER_AFTER_RESPONSE,
  KEEP_OPEN,
  DISCONNECT_AT_END,
  UPGRADE_TO_SSL_AT_END,
  DISCONNECT_AT_START,
  DISCONNECT_AFTER_REQUEST,
  DISCONNECT_DURING_REQUEST_BODY,
  DISCONNECT_DURING_RESPONSE_BODY,
  DO_NOT_READ_REQUEST_BODY,
  FAIL_HANDSHAKE,
  SHUTDOWN_INPUT_AT_END,

import okio.Options
import okio.Source
import okio.Timeout
import okio.buffer

/**
 * Reads a stream of [RFC 2046][rfc_2046] multipart body parts. Callers read parts one-at-a-time
 * until [nextPart] returns null. After calling [nextPart] any preceding parts should not be read.
 *
 * Typical use loops over the parts in sequence:
 *
 * ```kotlin
 * val response: Response = call.execute()

sealed interface SocketPolicy {
  /**
   * Shutdown [MockWebServer] after writing response.
   */
  object ShutdownServerAfterResponse : SocketPolicy

  /**
   * Keep the socket open after the response. This is the default HTTP/1.1 behavior.
   */
  object KeepOpen : SocketPolicy

  /**
   * Close the socket after the response. This is the default HTTP/1.0 behavior. For HTTP/2

* Then it returns the **response**.

!!! note "Technical Details"
    If you have dependencies with `yield`, the exit code will run *after* the middleware.

    If there were any background tasks (documented later), they will run *after* all the middleware.

## Create a middleware

To create a middleware you use the decorator `@app.middleware("http")` on top of a function.

import okio.Buffer
import okio.ByteString
import okio.ByteString.Companion.decodeHex
import okio.DeflaterSink

private val EMPTY_DEFLATE_BLOCK = "000000ffff".decodeHex()
private const val LAST_OCTETS_COUNT_TO_REMOVE_AFTER_DEFLATION = 4

class MessageDeflater(
  private val noContextTakeover: Boolean,
) : Closeable {
  private val deflatedBytes = Buffer()

  private val deflater =
    Deflater(
      Deflater.DEFAULT_COMPRESSION,

   *
   * With regular HTTP calls the request always completes sending before the response may begin
   * receiving. With duplex the request and response may be interleaved! That is, request body bytes
   * may be sent after response headers or body bytes have been received.
   *
   * Though any call may be initiated as a duplex call, only web servers that are specially

* All code merged in after the feature freeze must have an associated GitHub issue and a release note (exception for
  unit and integration test changes).
    * The release managers may not know of all the features being worked on for an Istio release. Developers must
      make their case as to why their PR should be merged.
* Developers submitting PRs after the code freeze and after the first release candidate must provide justification

  return when (val socketPolicy = socketPolicy) {
    SocketPolicy.SHUTDOWN_SERVER_AFTER_RESPONSE -> ShutdownServerAfterResponse
    SocketPolicy.KEEP_OPEN -> KeepOpen
    SocketPolicy.DISCONNECT_AT_END -> DisconnectAtEnd
    SocketPolicy.DISCONNECT_AT_START -> DisconnectAtStart
    SocketPolicy.DISCONNECT_AFTER_REQUEST -> DisconnectAfterRequest
    SocketPolicy.DISCONNECT_DURING_REQUEST_BODY -> DisconnectDuringRequestBody