Module: Rack::Mount::Utils

Defined in:
lib/rack/mount/utils.rb

Overview

Private utility methods used throughout Rack::Mount. – This module is a trash can. Try to move these functions into more appropriate contexts. ++

Constant Summary collapse

RESERVED_PCHAR = 
':@&=+$,;%'
SAFE_PCHAR = 
"#{URI::REGEXP::PATTERN::UNRESERVED}#{RESERVED_PCHAR}"
UNSAFE_PCHAR = 
Regexp.new("[^#{SAFE_PCHAR}]", false, 'N').freeze
Parser = 
URI.const_defined?(:Parser) ? URI::Parser.new : URI

Class Method Summary collapse

Class Method Details

.build_nested_query(value, prefix = nil) ⇒ Object

Taken from Rack 1.1.x to build nested query strings



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# File 'lib/rack/mount/utils.rb', line 88

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

.debug(msg) ⇒ Object 



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# File 'lib/rack/mount/utils.rb', line 25

def debug(msg)
  warn "Rack::Mount #{msg}" if $DEBUG
end

.escape_uri(uri) ⇒ Object 



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# File 'lib/rack/mount/utils.rb', line 71

def escape_uri(uri)
  Parser.escape(uri.to_s, UNSAFE_PCHAR)
end

.normalize_extended_expression(regexp) ⇒ Object 



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# File 'lib/rack/mount/utils.rb', line 118

def normalize_extended_expression(regexp)
  return regexp unless regexp.options & Regexp::EXTENDED != 0
  source = regexp.source
  source.gsub!(/#.+$/, '')
  source.gsub!(/\s+/, '')
  source.gsub!(/\\\//, '/')
  Regexp.compile(source)
end

.normalize_path(path) ⇒ Object

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("")      # => "/"



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# File 'lib/rack/mount/utils.rb', line 38

def normalize_path(path)
  path = "/#{path}"
  path.squeeze!('/')
  path.sub!(%r{/+\Z}, '')
  path = '/' if path == ''
  path
end

.parse_regexp(regexp) ⇒ Object 



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# File 'lib/rack/mount/utils.rb', line 128

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

.pop_trailing_blanks!(ary) ⇒ Object

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!([""])                # => []



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# File 'lib/rack/mount/utils.rb', line 53

def pop_trailing_blanks!(ary)
  while ary.length > 0 && (ary.last.nil? || ary.last == '')
    ary.pop
  end
  ary
end

.regexp_anchored?(regexp) ⇒ Boolean

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

Returns:

  • (Boolean) 


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# File 'lib/rack/mount/utils.rb', line 113

def regexp_anchored?(regexp)
 regexp.source =~ /\A(\\A|\^).*(\\Z|\$)\Z/m ? true : false
end

.silence_debug ⇒ Object 



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# File 'lib/rack/mount/utils.rb', line 17

def silence_debug
  old_debug, $DEBUG = $DEBUG, nil
  yield
ensure
  $DEBUG = old_debug
end

.unescape_uri(uri) ⇒ Object 



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# File 'lib/rack/mount/utils.rb', line 77

def unescape_uri(uri)
  Parser.unescape(uri).force_encoding('utf-8')
end