Detailed URL fetch info in Ruby

Is there any way I could get info such as how long did it take to connect to a remote server, time taken to receive the first byte of response, and the time taken to download the whole file?

I'm trying to create something like what Pingdom does.

_{(source: pingdom.com开发者_高级运维)}

You can do it with sockets, like this:

require "socket"

# START MEASURING CONNECTION TIME
connection = TCPSocket.open("example.com", 80)
# END MEASURING CONNECTION TIME

connection.print "GET / HTTP/1.1\r\nHost: example.com\r\n\r\n"

# START MEASURING RESPONSE FETCHING TIME
response = connection.read
# END MEASURING RESPONSE FETCHING TIME

connection.close