Archive for the ‘host’ tag
Resolve a hostname from an IP address in Ruby (Reverse-DNS)
It sounds easy, but I tried a lot of things before finding the solution I used.
I tried using:
`host 66.249.67.49` or
`nslookup 66.249.67.49`
These were fine, but it seems a bit hacky to use the shell. Also, it would require some sort of parsing to get the hostname that I want.
Browsing the web, I found a couple solutions that almost worked.
s = Socket.getaddrinfo('66.249.67.49',nil)
hostname = s[0][2]
This solution worked in IRB, worked in console, but for some reason would not work when I was running my mongrel server and trying to perform the exact same method call from a web-browser. ( I still don’t know why).
Digging around a bit more, I came up with this simple solution:
host = Resolv.new.getname('66.249.67.49')
Is it really that easy?? Give it a shot and let me know your thoughts !!
