Closing the client connection immediately after servers connection are closed

[martinpoljak]

If servers close all their connections to proxy, em-proxy immediately close (after writing currently written data) the connection to client too:

  def unbind_backend(name)
    debug [:unbind_backend, name]
    @servers[name] = nil

    # if all connections are terminated downstream, then notify client
    close_connection_after_writing if @servers.values.compact.size.zero?

    if @on_finish
      @on_finish.call(name)

      # not sure if this is required
      # @on_finish.call(:done) if @servers.values.compact.size.zero?
    end
  end

Problem occurs in cases, when we have some data from downstream in processing and server close the connection before our data for client is prepared for send. At these cases we need to say, we don't want to close connection to client just now, but manually later.

Some appropriate solution can be for example something similar to:

  def unbind_backend(name)
   debug [:unbind_backend, name]
    @servers[name] = nil
    close = :close

    if @on_finish
      close = @on_finish.call(name)
    end

    # if all connections are terminated downstream, then notify client
    if @servers.values.compact.size.zero? and close != :keep
      close_connection_after_writing
    end

  end

[igrigorik]

Hmm, that seems to make sense.. Do you have an example of how you would manually close the connection later?