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begin
require 'regin'
rescue LoadError
$: << File.expand_path(File.join(File.dirname(__FILE__), 'vendor/regin'))
require 'regin'
end
require 'uri'
module Rack::Mount
# Private utility methods used throughout Rack::Mount.
#--
# This module is a trash can. Try to move these functions into
# more appropriate contexts.
#++
module Utils
def silence_debug
old_debug, $DEBUG = $DEBUG, nil
yield
ensure
$DEBUG = old_debug
end
module_function :silence_debug
def debug(msg)
warn "Rack::Mount #{msg}" if $DEBUG
end
module_function :debug
# Normalizes URI path.
#
# Strips off trailing slash and ensures there is a leading slash.
#
# normalize_path("/foo") # => "/foo"
# normalize_path("/foo/") # => "/foo"
# normalize_path("foo") # => "/foo"
# normalize_path("") # => "/"
def normalize_path(path)
path = "/#{path}"
path.squeeze!('/')
path.sub!(%r{/+\Z}, '')
path = '/' if path == ''
path
end
module_function :normalize_path
# Removes trailing nils from array.
#
# pop_trailing_blanks!([1, 2, 3]) # => [1, 2, 3]
# pop_trailing_blanks!([1, 2, 3, nil, ""]) # => [1, 2, 3]
# pop_trailing_blanks!([nil]) # => []
# pop_trailing_blanks!([""]) # => []
def pop_trailing_blanks!(ary)
while ary.length > 0 && (ary.last.nil? || ary.last == '')
ary.pop
end
ary
end
module_function :pop_trailing_blanks!
RESERVED_PCHAR = ':@&=+$,;%'
SAFE_PCHAR = "#{URI::REGEXP::PATTERN::UNRESERVED}#{RESERVED_PCHAR}"
if RUBY_VERSION >= '1.9'
UNSAFE_PCHAR = Regexp.new("[^#{SAFE_PCHAR}]", false).freeze
else
UNSAFE_PCHAR = Regexp.new("[^#{SAFE_PCHAR}]", false, 'N').freeze
end
Parser = URI.const_defined?(:Parser) ? URI::Parser.new : URI
def escape_uri(uri)
Parser.escape(uri.to_s, UNSAFE_PCHAR)
end
module_function :escape_uri
if ''.respond_to?(:force_encoding)
def unescape_uri(uri)
Parser.unescape(uri).force_encoding('utf-8')
end
else
def unescape_uri(uri)
URI.unescape(uri)
end
end
module_function :unescape_uri
# Taken from Rack 1.1.x to build nested query strings
def build_nested_query(value, prefix = nil) #:nodoc:
case value
when Array
value.map { |v|
build_nested_query(v, "#{prefix}[]")
}.join("&")
when Hash
value.map { |k, v|
build_nested_query(v, prefix ? "#{prefix}[#{Rack::Utils.escape(k)}]" : Rack::Utils.escape(k))
}.join("&")
when String
raise ArgumentError, "value must be a Hash" if prefix.nil?
"#{prefix}=#{Rack::Utils.escape(value)}"
else
prefix
end
end
module_function :build_nested_query
# Determines whether the regexp must match the entire string.
#
# regexp_anchored?(/^foo$/) # => true
# regexp_anchored?(/foo/) # => false
# regexp_anchored?(/^foo/) # => false
# regexp_anchored?(/foo$/) # => false
def regexp_anchored?(regexp)
regexp.source =~ /\A(\\A|\^).*(\\Z|\$)\Z/m ? true : false
end
module_function :regexp_anchored?
def normalize_extended_expression(regexp)
return regexp if (regexp.options & Regexp::EXTENDED) == 0
source = regexp.source
source.gsub!(/#.+$/, '')
source.gsub!(/\s+/, '')
source.gsub!(/\\\//, '/')
Regexp.compile(source)
end
module_function :normalize_extended_expression
def parse_regexp(regexp)
cache = @@_parse_regexp_cache ||= {}
if expression = cache[regexp]
return expression
end
unless regexp.is_a?(RegexpWithNamedGroups)
regexp = RegexpWithNamedGroups.new(regexp)
end
expression = Regin.parse(regexp)
unless Regin.regexp_supports_named_captures?
tag_captures = Proc.new do |group|
case group
when Regin::Group
# TODO: dup instead of mutating
group.instance_variable_set('@name', regexp.names[group.index]) if group.index
tag_captures.call(group.expression)
when Regin::Expression
group.each { |child| tag_captures.call(child) }
end
end
tag_captures.call(expression)
end
cache[regexp] = expression.freeze
expression
rescue Racc::ParseError, Regin::Parser::ScanError
[]
end
module_function :parse_regexp
end
end
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