@Throws(IOException::class)
  private fun readJournal() {
    fileSystem.read(journalFile) {
      val magic = readUtf8LineStrict()
      val version = readUtf8LineStrict()
      val appVersionString = readUtf8LineStrict()
      val valueCountString = readUtf8LineStrict()
      val blank = readUtf8LineStrict()

      if (MAGIC != magic ||
        VERSION_1 != version ||
        appVersion.toString() != appVersionString ||

    try {
      val requestLineString = socket.source.readUtf8LineStrict()
      if (requestLineString.isEmpty()) {
        throw ProtocolException("no request because the stream is exhausted")
      }
      request = decodeRequestLine(requestLineString)

      while (true) {
        val header = socket.source.readUtf8LineStrict()
        if (header.isEmpty()) {
          break
        }

        val urlLine = source.readUtf8LineStrict()
        // Choice here is between failing with a correct RuntimeException
        // or mostly silently with an IOException
        url = urlLine.toHttpUrlOrNull() ?: throw IOException("Cache corruption for $urlLine").also {
          Platform.get().log("cache corruption", WARN, it)
        }
        requestMethod = source.readUtf8LineStrict()

      // Read the suffix of the previous chunk.
      if (bytesRemainingInChunk != NO_CHUNK_YET) {
        socket.source.readUtf8LineStrict()
      }
      try {
        bytesRemainingInChunk = socket.source.readHexadecimalUnsignedLong()
        val extensions = socket.source.readUtf8LineStrict().trim()
        if ((bytesRemainingInChunk < 0L) || (extensions.isNotEmpty() && !extensions.startsWith(";"))) {