Method: Kafka::SSLSocketWithTimeout#write

Defined in:
lib/kafka/ssl_socket_with_timeout.rb

#write(bytes) ⇒ Integer

Writes bytes to the socket, possible with a timeout.

Parameters:

  • bytes (String) —

    the data that should be written to the socket.

Returns:

  • (Integer) —

    the number of bytes written.

Raises:

  • (Errno::ETIMEDOUT) —

    if the timeout is exceeded.



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# File 'lib/kafka/ssl_socket_with_timeout.rb', line 122

def write(bytes)
  loop do
    written = 0
    begin
      # unlike plain tcp sockets, ssl sockets don't support IO.select
      # properly.
      # Instead, timeouts happen on a per write basis, and we have to
      # catch exceptions from write_nonblock, and gradually build up
      # our write buffer.
      written += @ssl_socket.write_nonblock(bytes)
    rescue Errno::EFAULT => error
        raise error
    rescue OpenSSL::SSL::SSLError, Errno::EAGAIN, Errno::EWOULDBLOCK, IO::WaitWritable => error
      if error.is_a?(OpenSSL::SSL::SSLError) && error.message == 'write would block'
        if select_with_timeout(@ssl_socket, :write)
          retry
        else
          raise Errno::ETIMEDOUT
        end
      else
        raise error
      end
    end

    # Fast, common case.
    break if written == bytes.size

    # This takes advantage of the fact that most ruby implementations
    # have Copy-On-Write strings. Thusly why requesting a subrange
    # of data, we actually don't copy data because the new string
    # simply references a subrange of the original.
    bytes = bytes[written, bytes.size]
  end
end