Class: PhusionPassenger::Utils::HostsFileParser

Inherits:

Object

• Object
• PhusionPassenger::Utils::HostsFileParser

show all

Defined in:

lib/phusion_passenger/utils/hosts_file_parser.rb

Overview

Class Method Summary (collapse)

• + (Object) flush_dns_cache!

Instance Method Summary (collapse)

• - (Object) add_group_data(marker, data)
• - (Object) host_count
• - (HostsFileParser) initialize(filename_or_io = "/etc/hosts")) constructor

  A new instance of HostsFileParser.

• - (Object) ip_count
• - (Object) resolve(host_name)
• - (Boolean) resolves_to_localhost?(hostname)
• - (Object) write(io)

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# File 'lib/phusion_passenger/utils/hosts_file_parser.rb', line 36

def initialize(filename_or_io = "/etc/hosts")
	if filename_or_io.respond_to?(:readline)
		read_and_parse(filename_or_io)
	else
		File.open(filename_or_io, "rb") do |f|
			read_and_parse(f)
		end
	end
end

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# File 'lib/phusion_passenger/utils/hosts_file_parser.rb', line 30

def self.flush_dns_cache!
	if RUBY_PLATFORM =~ /darwin/
		system("dscacheutil -flushcache")
	end
end

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# File 'lib/phusion_passenger/utils/hosts_file_parser.rb', line 67

def add_group_data(marker, data)
	begin_index = find_line(0, "###### BEGIN #{marker} ######")
	end_index = find_line(begin_index + 1, "###### END #{marker} ######") if begin_index
	if begin_index && end_index
		@lines[begin_index + 1 .. end_index - 1] = data.split("\n")
	else
		@lines << "###### BEGIN #{marker} ######"
		@lines.concat(data.split("\n"))
		@lines << "###### END #{marker} ######"
	end
end

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# File 'lib/phusion_passenger/utils/hosts_file_parser.rb', line 50

def host_count
	return @host_names.size
end

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# File 'lib/phusion_passenger/utils/hosts_file_parser.rb', line 46

def ip_count
	return @ips.size
end

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# File 'lib/phusion_passenger/utils/hosts_file_parser.rb', line 54

def resolve(host_name)
	if host_name.downcase == "localhost"
		return "127.0.0.1"
	else
		return @host_names[host_name.downcase]
	end
end

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# File 'lib/phusion_passenger/utils/hosts_file_parser.rb', line 62

def resolves_to_localhost?(hostname)
	ip = resolve(hostname)
	return ip == "127.0.0.1" || ip == "::1" || ip == "0.0.0.0"
end

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# File 'lib/phusion_passenger/utils/hosts_file_parser.rb', line 79

def write(io)
	@lines.each do |line|
		io.puts(line)
	end
end