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Contents
require 'resolv'
require 'middleman-core/dns_resolver/network_resolver'
require 'middleman-core/dns_resolver/hosts_resolver'
module Middleman
# This resolves IP address to names and vice versa
class DnsResolver
private
attr_reader :resolvers
public
# Create resolver
#
# First the local resolver is used. If environment variable HOSTSRC is
# given this file is used for local name lookup.
#
# @param [#getnames, #getaddresses] network_resolver
# The resolver which uses a network name server to resolve ip addresses
# and names.
#
# @param [#getnames, #getaddresses] local_resolver
# The resolver uses /etc/hosts on POSIX-systems and
# C:\Windows\System32\drivers\etc\hosts on Windows-operating systems to
# resolve ip addresses and names.
#
# First the local resolver is queried. If this raises an error or returns
# nil or [] the network resolver is queried.
def initialize(opts={})
@resolvers = []
@resolvers << opts.fetch(:hosts_resolver, HostsResolver.new)
if RUBY_VERSION >= '2.1'
require 'middleman-core/dns_resolver/local_link_resolver'
@resolvers << opts.fetch(:local_link_resolver, LocalLinkResolver.new)
end
@resolvers << opts.fetch(:network_resolver, NetworkResolver.new)
end
# Get names for given ip
#
# @param [String] ip
# The ip which should be resolved.
def names_for(ip)
resolvers.each do |r|
names = r.getnames(ip)
return names unless names.nil? || names.empty?
end
[]
end
# Get ips for given name
#
# First the local resolver is used. On POSIX-systems /etc/hosts is used. On
# Windows C:\Windows\System32\drivers\etc\hosts is used.
#
# @param [String] name
# The name which should be resolved.
def ips_for(name)
resolvers.each do |r|
ips = r.getaddresses(name)
return ips unless ips.nil? || ips.empty?
end
[]
end
end
end
Version data entries
38 entries across 38 versions & 3 rubygems