class Resolv::Hosts

Resolv::Hosts is a hostname resolver that uses the system hosts file.

Constants

DefaultFileName

Public Class Methods

new(filename = DefaultFileName) click to toggle source

Creates a new Resolv::Hosts, using filename for its data source.

# File lib/resolv.rb, line 179
def initialize(filename = DefaultFileName)
  @filename = filename
  @mutex = Thread::Mutex.new
  @initialized = nil
end

Public Instance Methods

each_address(name, &proc) click to toggle source

Iterates over all IP addresses for name retrieved from the hosts file.

# File lib/resolv.rb, line 236
def each_address(name, &proc)
  lazy_initialize
  if @name2addr.include?(name)
    @name2addr[name].each(&proc)
  end
end

each_name(address, &proc) click to toggle source

Iterates over all hostnames for address retrieved from the hosts file.

# File lib/resolv.rb, line 263
def each_name(address, &proc)
  lazy_initialize
  @addr2name[address]&.each(&proc)
end

getaddress(name) click to toggle source

Gets the IP address of name from the hosts file.

# File lib/resolv.rb, line 219
def getaddress(name)
  each_address(name) {|address| return address}
  raise ResolvError.new("#{@filename} has no name: #{name}")
end

getaddresses(name) click to toggle source

Gets all IP addresses for name from the hosts file.

# File lib/resolv.rb, line 227
def getaddresses(name)
  ret = []
  each_address(name) {|address| ret << address}
  return ret
end

getname(address) click to toggle source

Gets the hostname of address from the hosts file.

# File lib/resolv.rb, line 246
def getname(address)
  each_name(address) {|name| return name}
  raise ResolvError.new("#{@filename} has no address: #{address}")
end

getnames(address) click to toggle source

Gets all hostnames for address from the hosts file.

# File lib/resolv.rb, line 254
def getnames(address)
  ret = []
  each_name(address) {|name| ret << name}
  return ret
end