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=begin
= Ruby-space definitions that completes C-space funcs for Config
= Info
Copyright (C) 2010 Hiroshi Nakamura <nahi@ruby-lang.org>
= Licence
This program is licenced under the same licence as Ruby.
(See the file 'LICENCE'.)
=end
require 'stringio'
module OpenSSL
class Config
include Enumerable
class << self
def parse(str)
c = new()
parse_config(StringIO.new(str)).each do |section, hash|
c[section] = hash
end
c
end
alias load new
def parse_config(io)
begin
parse_config_lines(io)
rescue ConfigError => e
e.message.replace("error in line #{io.lineno}: " + e.message)
raise
end
end
def get_key_string(data, section, key) # :nodoc:
if v = data[section] && data[section][key]
return v
elsif section == 'ENV'
if v = ENV[key]
return v
end
end
if v = data['default'] && data['default'][key]
return v
end
end
private
def parse_config_lines(io)
section = 'default'
data = {section => {}}
while definition = get_definition(io)
definition = clear_comments(definition)
next if definition.empty?
if definition[0] == ?[
if /\[([^\]]*)\]/ =~ definition
section = $1.strip
data[section] ||= {}
else
raise ConfigError, "missing close square bracket"
end
else
if /\A([^:\s]*)(?:::([^:\s]*))?\s*=(.*)\z/ =~ definition
if $2
section = $1
key = $2
else
key = $1
end
value = unescape_value(data, section, $3)
(data[section] ||= {})[key] = value.strip
else
raise ConfigError, "missing equal sign"
end
end
end
data
end
# escape with backslash
QUOTE_REGEXP_SQ = /\A([^'\\]*(?:\\.[^'\\]*)*)'/
# escape with backslash and doubled dq
QUOTE_REGEXP_DQ = /\A([^"\\]*(?:""[^"\\]*|\\.[^"\\]*)*)"/
# escaped char map
ESCAPE_MAP = {
"r" => "\r",
"n" => "\n",
"b" => "\b",
"t" => "\t",
}
def unescape_value(data, section, value)
scanned = []
while m = value.match(/['"\\$]/)
scanned << m.pre_match
c = m[0]
value = m.post_match
case c
when "'"
if m = value.match(QUOTE_REGEXP_SQ)
scanned << m[1].gsub(/\\(.)/, '\\1')
value = m.post_match
else
break
end
when '"'
if m = value.match(QUOTE_REGEXP_DQ)
scanned << m[1].gsub(/""/, '').gsub(/\\(.)/, '\\1')
value = m.post_match
else
break
end
when "\\"
c = value.slice!(0, 1)
scanned << (ESCAPE_MAP[c] || c)
when "$"
ref, value = extract_reference(value)
refsec = section
if ref.index('::')
refsec, ref = ref.split('::', 2)
end
if v = get_key_string(data, refsec, ref)
scanned << v
else
raise ConfigError, "variable has no value"
end
else
raise 'must not reaced'
end
end
scanned << value
scanned.join
end
def extract_reference(value)
rest = ''
if m = value.match(/\(([^)]*)\)|\{([^}]*)\}/)
value = m[1] || m[2]
rest = m.post_match
elsif [?(, ?{].include?(value[0])
raise ConfigError, "no close brace"
end
if m = value.match(/[a-zA-Z0-9_]*(?:::[a-zA-Z0-9_]*)?/)
return m[0], m.post_match + rest
else
raise
end
end
def clear_comments(line)
# FCOMMENT
if m = line.match(/\A([\t\n\f ]*);.*\z/)
return m[1]
end
# COMMENT
scanned = []
while m = line.match(/[#'"\\]/)
scanned << m.pre_match
c = m[0]
line = m.post_match
case c
when '#'
line = nil
break
when "'", '"'
regexp = (c == "'") ? QUOTE_REGEXP_SQ : QUOTE_REGEXP_DQ
scanned << c
if m = line.match(regexp)
scanned << m[0]
line = m.post_match
else
scanned << line
line = nil
break
end
when "\\"
scanned << c
scanned << line.slice!(0, 1)
else
raise 'must not reaced'
end
end
scanned << line
scanned.join
end
def get_definition(io)
if line = get_line(io)
while /[^\\]\\\z/ =~ line
if extra = get_line(io)
line += extra
else
break
end
end
return line.strip
end
end
def get_line(io)
if line = io.gets
line.gsub(/[\r\n]*/, '')
end
end
end
def initialize(filename = nil)
@data = {}
if filename
File.open(filename.to_s) do |file|
Config.parse_config(file).each do |section, hash|
self[section] = hash
end
end
end
end
def get_value(section, key)
if section.nil?
raise TypeError.new('nil not allowed')
end
section = 'default' if section.empty?
get_key_string(section, key)
end
def value(arg1, arg2 = nil)
warn('Config#value is deprecated; use Config#get_value')
if arg2.nil?
section, key = 'default', arg1
else
section, key = arg1, arg2
end
section ||= 'default'
section = 'default' if section.empty?
get_key_string(section, key)
end
def add_value(section, key, value)
check_modify
(@data[section] ||= {})[key] = value
end
def [](section)
@data[section] || {}
end
def section(name)
warn('Config#section is deprecated; use Config#[]')
@data[name] || {}
end
def []=(section, pairs)
check_modify
@data[section] ||= {}
pairs.each do |key, value|
self.add_value(section, key, value)
end
end
def sections
@data.keys
end
def to_s
ary = []
@data.keys.sort.each do |section|
ary << "[ #{section} ]\n"
@data[section].keys.each do |key|
ary << "#{key}=#{@data[section][key]}\n"
end
ary << "\n"
end
ary.join
end
def each
@data.each do |section, hash|
hash.each do |key, value|
yield [section, key, value]
end
end
end
def inspect
"#<#{self.class.name} sections=#{sections.inspect}>"
end
protected
def data
@data
end
private
def initialize_copy(other)
@data = other.data.dup
end
def check_modify
raise TypeError.new("Insecure: can't modify OpenSSL config") if frozen?
end
def get_key_string(section, key)
Config.get_key_string(@data, section, key)
end
end
end