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# frozen_string_literal: true
module Jekyll
module Utils
module Internet
# Public: Determine whether the present device has a connection to
# the Internet. This allows plugin writers which require the outside
# world to have a neat fallback mechanism for offline building.
#
# Example:
# if Internet.connected?
# Typhoeus.get("https://pages.github.com/versions.json")
# else
# Jekyll.logger.warn "Warning:", "Version check has been disabled."
# Jekyll.logger.warn "", "Connect to the Internet to enable it."
# nil
# end
#
# Returns true if a DNS call can successfully be made, or false if not.
module_function
def connected?
!dns("example.com").nil?
end
def dns(domain)
require "resolv"
Resolv::DNS.open do |resolver|
resolver.getaddress(domain)
end
rescue Resolv::ResolvError, Resolv::ResolvTimeout
nil
end
end
end
end
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