module Thin

module Backends

# Backend to act as a UNIX domain socket server.

class UnixServer < Base

# UNIX domain socket on which the server is listening for connections.

attr_accessor :socket

def initialize(socket)

raise PlatformNotSupported, 'UNIX domain sockets not available on Windows' if Thin.win?

@socket = socket

super()

end

# Connect the server

def connect

at_exit { remove_socket_file } # In case it crashes

old_umask = File.umask(0)

begin

EventMachine.start_unix_domain_server(@socket, UnixConnection, &method(:initialize_connection))

# HACK EventMachine.start_unix_domain_server doesn't return the connection signature

# so we have to go in the internal stuff to find it.

@signature = EventMachine.instance_eval{@acceptors.keys.first}

ensure

File.umask(old_umask)

end

end

# Stops the server

def disconnect

EventMachine.stop_server(@signature)

end

# Free up resources used by the backend.

def close

remove_socket_file

end

def to_s

@socket

end

protected

def remove_socket_file

File.delete(@socket) if @socket && File.exist?(@socket)

end

end

end

# Connection through a UNIX domain socket.

class UnixConnection < Connection

protected

def socket_address

'127.0.0.1' # Unix domain sockets can only be local

end

end

end