long callId = nextCallId.getAndIncrement();
      System.out.printf("%04d %s%n", callId, call.request().url());
      return new PrintingEventListener(callId, System.nanoTime());
    }
  };

  final long callId;
  final long callStartNanos;

  public PrintingEventListener(long callId, long callStartNanos) {
    this.callId = callId;
    this.callStartNanos = callStartNanos;
  }

01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] responseBodyEnd: byteCount=128
01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] connectionReleased
01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] callEnd
01-01 12:53:32.816 10999 11090 D OkHttp  : [54 ms] responseHeadersStart

document's age at the time it was served based on "Last-Modified". Default expiration dates aren't used for URIs 
containing a query.

 - CallStart
 - **CacheHit**
 - CallEnd
 
### Cache Miss

Under a cache miss the normal request events are seen but an additional event shows the presence of the cache.

  }

  override fun responseFailed(
    call: Call,
    ioe: IOException,
  ) {
    logWithTime("responseFailed: $ioe")
  }

  override fun callEnd(call: Call) {
    logWithTime("callEnd")
  }

  override fun callFailed(
    call: Call,
    ioe: IOException,
  ) {
    logWithTime("callFailed: $ioe")
  }

  override fun canceled(call: Call) {

    call: Call,
    ioe: IOException,
  ) {
    logWithTime("responseFailed: $ioe")

    delegate.responseFailed(call, ioe)
  }

  override fun callEnd(call: Call) {
    logWithTime("callEnd")

    delegate.callEnd(call)
  }

  override fun callFailed(
    call: Call,
    ioe: IOException,
  ) {
    logWithTime("callFailed: $ioe")

    delegate.callFailed(call, ioe)

01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] responseBodyEnd: byteCount=128
01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] connectionReleased
01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] callEnd
01-01 12:53:32.816 10999 11090 D OkHttp  : [54 ms] responseHeadersStart

        long callId = nextCallId.getAndIncrement();
        System.out.printf("%04d %s%n", callId, call.request().url());
        return new PrintingEventListener(callId, System.nanoTime());
      }
    };

    final long callId;
    final long callStartNanos;

    PrintingEventListener(long callId, long callStartNanos) {
      this.callId = callId;
      this.callStartNanos = callStartNanos;
    }

  override fun responseFailed(
    call: Call,
    ioe: IOException,
  ) = logEvent(ResponseFailed(System.nanoTime(), call, ioe))

  override fun callEnd(call: Call) = logEvent(CallEnd(System.nanoTime(), call))

  override fun callFailed(
    call: Call,
    ioe: IOException,
  ) = logEvent(CallFailed(System.nanoTime(), call, ioe))

      printEvent("responseBodyEnd");
    }

    @Override public void responseFailed(Call call, IOException ioe) {
      printEvent("responseFailed");
    }

    @Override public void callEnd(Call call) {
      printEvent("callEnd");
    }

    @Override public void callFailed(Call call, IOException ioe) {
      printEvent("callFailed");
    }

    @Override public void canceled(Call call) {

      "RequestHeadersStart",
      "RequestHeadersEnd",
      "ResponseHeadersStart",
      "ResponseHeadersEnd",
      "ResponseBodyStart",
      "ResponseBodyEnd",
      "ConnectionReleased",
      "CallEnd",
    )
  }

  private fun newEventSource(accept: String? = null): EventSource {
    val builder =
      Request.Builder()
        .url(server.url("/"))
    if (accept != null) {