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require 'chef/application'
require 'chef/chef_fs/path_utils'
require 'chef/http/simple'
require 'chef/json_compat'
class Chef
class ConfigFetcher
attr_reader :config_location
attr_reader :config_file_jail
def initialize(config_location, config_file_jail=nil)
@config_location = config_location
@config_file_jail = config_file_jail
end
def fetch_json
config_data = read_config
begin
Chef::JSONCompat.from_json(config_data)
rescue JSON::ParserError => error
Chef::Application.fatal!("Could not parse the provided JSON file (#{config_location}): " + error.message, 2)
end
end
def read_config
if remote_config?
fetch_remote_config
else
read_local_config
end
end
def fetch_remote_config
http.get("")
rescue SocketError, SystemCallError, Net::HTTPServerException => error
Chef::Application.fatal!("Cannot fetch config '#{config_location}': '#{error.class}: #{error.message}", 2)
end
def read_local_config
::File.read(config_location)
rescue Errno::ENOENT => error
Chef::Application.fatal!("Cannot load configuration from #{config_location}", 2)
rescue Errno::EACCES => error
Chef::Application.fatal!("Permissions are incorrect on #{config_location}. Please chmod a+r #{config_location}", 2)
end
def config_missing?
return false if remote_config?
# Check if the config file exists, and check if it is underneath the config file jail
begin
real_config_file = Pathname.new(config_location).realpath.to_s
rescue Errno::ENOENT
return true
end
# If realpath succeeded, the file exists
return false if !config_file_jail
begin
real_jail = Pathname.new(config_file_jail).realpath.to_s
rescue Errno::ENOENT
Chef::Log.warn("Config file jail #{config_file_jail} does not exist: will not load any config file.")
return true
end
!Chef::ChefFS::PathUtils.descendant_of?(real_config_file, real_jail)
end
def http
Chef::HTTP::Simple.new(config_location)
end
def remote_config?
!!(config_location =~ %r{^(http|https)://})
end
end
end
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