Rack::Mount::Utils

Private utility methods used throughout Rack::Mount.

Constants

RESERVED_PCHAR
SAFE_PCHAR
UNSAFE_PCHAR
UNSAFE_PCHAR
Parser

Public Class Methods

debug(msg) click to toggle source 
    # File lib/rack/mount/utils.rb, line 25
25:     def debug(msg)
26:       warn "Rack::Mount #{msg}" if $DEBUG
27:     end
escape_uri(uri) click to toggle source 
    # File lib/rack/mount/utils.rb, line 71
71:     def escape_uri(uri)
72:       Parser.escape(uri.to_s, UNSAFE_PCHAR)
73:     end
normalize_extended_expression(regexp) click to toggle source 
     # File lib/rack/mount/utils.rb, line 118
118:     def normalize_extended_expression(regexp)
119:       return regexp unless regexp.options & Regexp::EXTENDED != 0
120:       source = regexp.source
121:       source.gsub!(/#.+$/, '')
122:       source.gsub!(/\s+/, '')
123:       source.gsub!(/\\\//, '/')
124:       Regexp.compile(source)
125:     end
normalize_path(path) click to toggle source

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("")      # => "/"
    # File lib/rack/mount/utils.rb, line 38
38:     def normalize_path(path)
39:       path = "/#{path}"
40:       path.squeeze!('/')
41:       path.sub!(%{/+\Z}, '')
42:       path = '/' if path == ''
43:       path
44:     end
parse_regexp(regexp) click to toggle source 
     # File lib/rack/mount/utils.rb, line 128
128:     def parse_regexp(regexp)
129:       cache = @@_parse_regexp_cache ||= {}
130: 
131:       if expression = cache[regexp]
132:         return expression
133:       end
134: 
135:       unless regexp.is_a?(RegexpWithNamedGroups)
136:         regexp = RegexpWithNamedGroups.new(regexp)
137:       end
138: 
139:       expression = Regin.parse(regexp)
140: 
141:       unless Regin.regexp_supports_named_captures?
142:         tag_captures = Proc.new do |group|
143:           case group
144:           when Regin::Group
145:             # TODO: dup instead of mutating
146:             group.instance_variable_set('@name', regexp.names[group.index]) if group.index
147:             tag_captures.call(group.expression)
148:           when Regin::Expression
149:             group.each { |child| tag_captures.call(child) }
150:           end
151:         end
152:         tag_captures.call(expression)
153:       end
154: 
155:       cache[regexp] = expression.freeze
156:       expression
157:     rescue Racc::ParseError, Regin::Parser::ScanError
158:       []
159:     end
pop_trailing_blanks!(ary) click to toggle source

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!([""])                # => []
    # File lib/rack/mount/utils.rb, line 53
53:     def pop_trailing_blanks!(ary)
54:       while ary.length > 0 && (ary.last.nil? || ary.last == '')
55:         ary.pop
56:       end
57:       ary
58:     end
regexp_anchored?(regexp) click to toggle source

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
     # File lib/rack/mount/utils.rb, line 113
113:     def regexp_anchored?(regexp)
114:      regexp.source =~ /\A(\\A|\^).*(\\Z|\$)\Z/ ? true : false
115:     end
silence_debug() click to toggle source 
    # File lib/rack/mount/utils.rb, line 17
17:     def silence_debug
18:       old_debug, $DEBUG = $DEBUG, nil
19:       yield
20:     ensure
21:       $DEBUG = old_debug
22:     end
unescape_uri(uri) click to toggle source 
    # File lib/rack/mount/utils.rb, line 77
77:       def unescape_uri(uri)
78:         Parser.unescape(uri).force_encoding('utf-8')
79:       end
unescape_uri(uri) click to toggle source 
    # File lib/rack/mount/utils.rb, line 81
81:       def unescape_uri(uri)
82:         URI.unescape(uri)
83:       end

Private Instance Methods

debug(msg) click to toggle source 
    # File lib/rack/mount/utils.rb, line 25
25:     def debug(msg)
26:       warn "Rack::Mount #{msg}" if $DEBUG
27:     end
escape_uri(uri) click to toggle source 
    # File lib/rack/mount/utils.rb, line 71
71:     def escape_uri(uri)
72:       Parser.escape(uri.to_s, UNSAFE_PCHAR)
73:     end
normalize_extended_expression(regexp) click to toggle source 
     # File lib/rack/mount/utils.rb, line 118
118:     def normalize_extended_expression(regexp)
119:       return regexp unless regexp.options & Regexp::EXTENDED != 0
120:       source = regexp.source
121:       source.gsub!(/#.+$/, '')
122:       source.gsub!(/\s+/, '')
123:       source.gsub!(/\\\//, '/')
124:       Regexp.compile(source)
125:     end
normalize_path(path) click to toggle source

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("")      # => "/"
    # File lib/rack/mount/utils.rb, line 38
38:     def normalize_path(path)
39:       path = "/#{path}"
40:       path.squeeze!('/')
41:       path.sub!(%{/+\Z}, '')
42:       path = '/' if path == ''
43:       path
44:     end
parse_regexp(regexp) click to toggle source 
     # File lib/rack/mount/utils.rb, line 128
128:     def parse_regexp(regexp)
129:       cache = @@_parse_regexp_cache ||= {}
130: 
131:       if expression = cache[regexp]
132:         return expression
133:       end
134: 
135:       unless regexp.is_a?(RegexpWithNamedGroups)
136:         regexp = RegexpWithNamedGroups.new(regexp)
137:       end
138: 
139:       expression = Regin.parse(regexp)
140: 
141:       unless Regin.regexp_supports_named_captures?
142:         tag_captures = Proc.new do |group|
143:           case group
144:           when Regin::Group
145:             # TODO: dup instead of mutating
146:             group.instance_variable_set('@name', regexp.names[group.index]) if group.index
147:             tag_captures.call(group.expression)
148:           when Regin::Expression
149:             group.each { |child| tag_captures.call(child) }
150:           end
151:         end
152:         tag_captures.call(expression)
153:       end
154: 
155:       cache[regexp] = expression.freeze
156:       expression
157:     rescue Racc::ParseError, Regin::Parser::ScanError
158:       []
159:     end
pop_trailing_blanks!(ary) click to toggle source

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!([""])                # => []
    # File lib/rack/mount/utils.rb, line 53
53:     def pop_trailing_blanks!(ary)
54:       while ary.length > 0 && (ary.last.nil? || ary.last == '')
55:         ary.pop
56:       end
57:       ary
58:     end
regexp_anchored?(regexp) click to toggle source

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
     # File lib/rack/mount/utils.rb, line 113
113:     def regexp_anchored?(regexp)
114:      regexp.source =~ /\A(\\A|\^).*(\\Z|\$)\Z/ ? true : false
115:     end
silence_debug() click to toggle source 
    # File lib/rack/mount/utils.rb, line 17
17:     def silence_debug
18:       old_debug, $DEBUG = $DEBUG, nil
19:       yield
20:     ensure
21:       $DEBUG = old_debug
22:     end
unescape_uri(uri) click to toggle source 
    # File lib/rack/mount/utils.rb, line 81
81:       def unescape_uri(uri)
82:         URI.unescape(uri)
83:       end
unescape_uri(uri) click to toggle source 
    # File lib/rack/mount/utils.rb, line 77
77:       def unescape_uri(uri)
78:         Parser.unescape(uri).force_encoding('utf-8')
79:       end

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