source.read(sink, byteCount)
      } catch (e: IOException) {
        carrier.noNewExchanges()
        responseBodyComplete()
        throw e
      }
    }

    /**
     * Closes the cache entry and makes the socket available for reuse. This should be invoked when
     * the end of the body has been reached.
     */
    fun responseBodyComplete() {
      if (state == STATE_CLOSED) return