Module: Thecon

Defined in:
lib/thecon.rb,
lib/thecon/version.rb

Constant Summary collapse

VERSION = 
"0.0.2"

Class Method Summary collapse

Class Method Details

.ready?(port = 80, ip = "localhost", connection_timeout = 3, read_timeout = 2) ⇒ Boolean

Your code goes here…

Returns:

  • (Boolean) 


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# File 'lib/thecon.rb', line 8

def self.ready?(port=80, ip = "localhost", connection_timeout = 3, read_timeout = 2)
	result = false
begin
		timeout( connection_timeout ) do
      socket = Socket.new :INET, :STREAM
      sockaddr = Socket.pack_sockaddr_in port, ip
      socket.connect sockaddr
      begin
        timeout( read_timeout ) do
          r,w,e = select([socket], nil, nil, 1) # nil, nil, nil from inside the network
          unless r.nil? then
            p "socket was closed" if ( r[0].read(1).nil? ) #This means there is something there
            result = false #Something closed this
          else
            p "not available for read: either doesn't exist or not closed" #TRUE
            result = true
          end
        end
      rescue StandardError => ka
        p "OK, standardERROR #{ka}" #If socket.read there could be errors (this shouldn't be triggered)
        result = true
      rescue Timeout::Error => e
        p "timedout reading" #Socket is there but there are not data to read (if socket.read)
        result = true
      end
    end
  rescue Errno::ECONNREFUSED, Errno::EHOSTUNREACH
    result=false # Connection fails on its own
  rescue Timeout::Error, StandardError => e
    result=false # When host or port is wrong (connection timesout or some other Errno)
  rescue
  end

  result
end