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#!/usr/bin/env ruby
require "net/http"
require "net/ping"
require "socket"
class Host
def initialize s
parts = s.split
@hostname = parts.first
@services_and_ports = {}
@sites = []
parts.slice(1, parts.size).each { |part|
if part[0] == "@"
url = part.slice 1, part.size
@sites << url
else
service, port_and_protocol = part.split ":"
port, protocol = port_and_protocol.split "/"
@services_and_ports["#{service}/#{protocol}"] = [port.to_i, protocol]
end
}
end
def hostname
return @hostname
end
def up? hostname
ping = Net::Ping::External.new @hostname
ping.ping?
end
def service_up? service, port, protocol
if protocol == "tcp"
begin
sock = TCPSocket.new @hostname, port
sock.close
return true
rescue
return false
end
elsif protocol == "udp"
system "nc -u -z -w 1 #{@hostname} #{port+1} &>/dev/null"
return $?.success?
else
STDERR.write "unknown protocol '#{protocol}'\n"
end
return false
end
def site_up? site
begin
url = URI site
response = Net::HTTP.get_response url
return response.kind_of? Net::HTTPSuccess
rescue
return false
end
end
def check
ret = {}
ret["up"] = up? @hostname
return ret if not ret["up"]
@services_and_ports.each_key { |k|
ret[k] = service_up? k, @services_and_ports[k][0], @services_and_ports[k][1]
}
@sites.each { |url|
ret[url] = site_up? url
}
return ret
end
end
def main
while line = STDIN.gets
h = Host.new line
puts h.check.to_s
end
end
if __FILE__ == $0
main
end
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