Class: Rack::AcceptLanguage

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/accept_language.rb

Constant Summary collapse

QVALUE = 
/(?:0(?:\.\d{0,3})?)|(?:1(?:\.0{0,3})?)/
ALPHABET = 
/[a-z]/i
LANGUAGE_TAG = 
/(?:#{ALPHABET}{1,8}(?:-#{ALPHABET}{1,8})*)|\*/o
LANGUAGE_RANGE = 
/(#{LANGUAGE_TAG})(?:;q=(#{QVALUE}))?/o

Instance Method Summary collapse

Constructor Details

#initialize(app, *args, &block) ⇒ AcceptLanguage

Returns a new instance of AcceptLanguage.



7
8
9
 
# File 'lib/rack/accept_language.rb', line 7

def initialize(app, *args, &block)
  @app = app
end

Instance Method Details

#accept_language(env) ⇒ Object 



15
16
17
 
# File 'lib/rack/accept_language.rb', line 15

def accept_language(env)
  env.tap{ |e| e['rack.accept_language'] = parse env['HTTP_ACCEPT_LANGUAGE'] }
end

#call(env) ⇒ Object 



11
12
13
 
# File 'lib/rack/accept_language.rb', line 11

def call(env)
  @app.call(accept_language env)
end

#parse(hal) ⇒ Object 



19
20
21
22
23
24
25
26
 
# File 'lib/rack/accept_language.rb', line 19

def parse(hal)
  hal.to_s.scan(LANGUAGE_RANGE).inject([]) { |r, (l, q)|
    r << [l, [1 - (q || 1).to_f, -l.size, r.size]]
  }.sort_by{ |e| e[1] }.map{ |e|
    l, c = e[0].split(/-/, 2)
    c ? "#{l.downcase}-#{c.upcase}" : l.downcase
  }
end