printEvent("requestHeadersEnd");
    }

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

    @Override public void requestBodyEnd(Call call, long byteCount) {
      printEvent("requestBodyEnd");
    }

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

      printEvent("requestHeadersEnd");
    }

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

    @Override public void requestBodyEnd(Call call, long byteCount) {
      printEvent("requestBodyEnd");
    }

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

    private Source source(Source source) {
      return new ForwardingSource(source) {
        long totalBytesRead = 0L;

        @Override public long read(Buffer sink, long byteCount) throws IOException {
          long bytesRead = super.read(sink, byteCount);
          // read() returns the number of bytes read, or -1 if this source is exhausted.
          totalBytesRead += bytesRead != -1 ? bytesRead : 0;