* Exchanges that do not have a response body can call
 * [newFixedLengthSource(0)][newFixedLengthSource] and may skip reading and closing that source.
 */
class Http1ExchangeCodec(
  /** The client that configures this stream. May be null for HTTPS proxy tunnels. */
  private val client: OkHttpClient?,
  override val carrier: ExchangeCodec.Carrier,
  private val source: BufferedSource,

import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.connection.Locks.withLock
import okhttp3.internal.connection.RoutePlanner.ConnectResult
import okhttp3.internal.http.ExchangeCodec
import okhttp3.internal.http1.Http1ExchangeCodec
import okhttp3.internal.platform.Platform
import okhttp3.internal.tls.OkHostnameVerifier
import okhttp3.internal.toHostHeader
import okio.BufferedSink
import okio.BufferedSource
import okio.buffer

import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.connection.Locks.withLock
import okhttp3.internal.http.ExchangeCodec
import okhttp3.internal.http.RealInterceptorChain
import okhttp3.internal.http1.Http1ExchangeCodec
import okhttp3.internal.http2.ConnectionShutdownException
import okhttp3.internal.http2.ErrorCode
import okhttp3.internal.http2.FlowControlListener
import okhttp3.internal.http2.Http2Connection