def self.detect_idle_timeout uri, max = 10
uri = URI uri unless URI::Generic === uri
uri += '/'
req = Net::HTTP::Head.new uri.request_uri
http = new 'net-http-persistent detect_idle_timeout'
connection = http.connection_for uri
sleep_time = 0
loop do
response = connection.request req
$stderr.puts "HEAD #{uri} => #{response.code}" if $DEBUG
unless Net::HTTPOK === response then
raise Error, "bad response code #{response.code} detecting idle timeout"
end
break if sleep_time >= max
sleep_time += 1
$stderr.puts "sleeping #{sleep_time}" if $DEBUG
sleep sleep_time
end
rescue
ensure
http.shutdown
return sleep_time unless $!
end