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Versions: 21
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Contents
#:stopdoc:
module RailsConnector
module GooglebotChecker
require 'socket'
protected
def referer_is_google?
return true if request.headers['Referer'] =~ /google/
end
def is_genuine_googlebot?(ip_address)
if ip_address =~ /\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/
host = reverse_dns_lookup_for_ip(ip_address)
return false unless host =~ /googlebot.com$/
res = forward_dns_matcher(host, ip_address)
return res
else
return false
end
end
private
def reverse_dns_lookup_for_ip(ip_address)
begin
addr = Socket.gethostbyname(ip_address)
Socket.gethostbyaddr(addr[3],Socket::AF_INET)[0]
rescue
[]
end
end
def forward_dns_matcher(host, ip_address)
begin
lookup = Socket.getaddrinfo(host, 0,
Socket::AF_INET, Socket::SOCK_STREAM, nil,
Socket::AI_CANONNAME)
return true if lookup.collect {|info| info[3]}.uniq.include?(ip_address)
rescue
false
end
false
end
end
end
Version data entries
21 entries across 21 versions & 1 rubygems