Current File : //opt/cpanel/ea-ruby27/root/usr/share/passenger/phusion_passenger/utils/hosts_file_parser.rb
# encoding: binary
# Phusion Passenger - https://www.phusionpassenger.com/
# Copyright (c) 2010-2017 Phusion Holding B.V.
#
# "Passenger", "Phusion Passenger" and "Union Station" are registered
# trademarks of Phusion Holding B.V.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
PhusionPassenger.require_passenger_lib 'platform_info/operating_system'
module PhusionPassenger
module Utils
# A /etc/hosts parser. Also supports writing groups of data to the file.
class HostsFileParser
def self.flush_dns_cache!
if PlatformInfo.os_name_simple == "macosx"
system("dscacheutil -flushcache")
end
end
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
def ip_count
return @ips.size
end
def host_count
return @host_names.size
end
def resolve(host_name)
if host_name.downcase == "localhost"
return "127.0.0.1"
else
return @host_names[host_name.downcase]
end
end
def resolves_to_localhost?(hostname)
ip = resolve(hostname)
return ip == "127.0.0.1" || ip == "::1" || ip == "0.0.0.0"
end
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
def write(io)
@lines.each do |line|
io.puts(line)
end
end
private
def read_and_parse(io)
lines = []
ips = {}
all_host_names = {}
while !io.eof?
line = io.readline
line.sub!(/\n\Z/m, '')
lines << line
ip, host_names = parse_line(line)
if ip
ips[ip] ||= []
ips[ip].concat(host_names)
host_names.each do |host_name|
all_host_names[host_name.downcase] = ip
end
end
end
@lines = lines
@ips = ips
@host_names = all_host_names
end
def parse_line(line)
return nil if line =~ /^[\s\t]*#/
line = line.strip
return nil if line.empty?
ip, *host_names = line.split(/[ \t]+/)
return [ip, host_names]
end
def find_line(start_index, content)
i = start_index
while i < @lines.size
if @lines[i] == content
return i
else
i += 1
end
end
return nil
end
end
end
end
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