HTTP Accept parsers for Rack

gistfile1.rb

#moved to http://github.com/SSDany/rack-acceptable/tree/master
#some examples:

require 'rubygems'
require 'rack'
require 'rack/acceptable'

class Request < Rack::Request
  include Rack::Acceptable::Media
end

env = Rack::MockRequest.env_for('/','HTTP_ACCEPT' => 'text/*')
request = Request.new(env)
request.accept_media?('text/plain') #=> true

env = Rack::MockRequest.env_for('/','HTTP_ACCEPT' => 'text/plain;q=0,text/*')
request = Request.new(env)
request.accept_media?('text/css') #=> true
request.accept_media?('text/plain') #=> false
request.accept_media?('video/quicktime') #=> false

env = Rack::MockRequest.env_for('/','HTTP_ACCEPT' => 'text/x-json;q=0.9,text/*;q=1.0')
request = Request.new(env)
request.preferred_media_from('text/x-json','text/css') #=> "text/css"

env = Rack::MockRequest.env_for('/','HTTP_ACCEPT' => 'text/*,text/x-json')
request = Request.new(env)
request.preferred_media_from('text/css','text/x-json') #=> "text/x-json"
request.preferred_media_from('text/css','text/x-JSON') #=> "text/x-JSON"

env = Rack::MockRequest.env_for('/','HTTP_ACCEPT' => 'text/*,text/x-json,text/html;p=whatever')
request = Request.new(env)
request.preferred_media_from('text/css','text/html') #=> "text/css"
request.preferred_media_from('text/x-json','text/html;p=whatever') #=> "text/html;p=whatever" # most specific wins
request.preferred_media_from('text/x-json','text/html;p=Whatever') #=> "text/x-json" # parameter values are case-sensitive.

# RFC2616 example
env = Rack::MockRequest.env_for('/','HTTP_ACCEPT' => 'text/*;q=0.3, text/html;q=0.7, text/html;level=1, text/html;level=2;q=0.4, */*;q=0.5')
request = Request.new(env)
accepts = request.acceptable_media
Rack::Acceptable::MIMETypes.qualify_mime_type('text/html;level=1',accepts) #=> 1.0
Rack::Acceptable::MIMETypes.qualify_mime_type('text/html',accepts) #=> 0.7
Rack::Acceptable::MIMETypes.qualify_mime_type('text/plain',accepts)  #=> 0.3
Rack::Acceptable::MIMETypes.qualify_mime_type('image/jpeg',accepts)  #=> 0.5
Rack::Acceptable::MIMETypes.qualify_mime_type('text/html;level=2',accepts) #=> 0.4
Rack::Acceptable::MIMETypes.qualify_mime_type('text/html;level=3',accepts) #=> 0.7

Rack::Acceptable::LanguageTag.extract_language_info('SL-LATN-ROZAJ') #=> ["sl",nil,"Latn",nil,["rozaj"]]
langtag = Rack::Acceptable::LanguageTag.parse('SL-LATN-ROZAJ')
langtag.variants #=> ["rozaj"]
langtag.script #=> "Latn"
langtag.has_prefix?('sl-Latn') #=> true
langtag.has_prefix?('sl-Latn-ro') #=> false
langtag.has_prefix?('sl') #=> true
langtag.nicecased #=> "sl-Latn-rozaj"

# recomposition
langtag.variants = ['nedis']
langtag.privateuse = ['whatever']
langtag.extensions = {'a' => %w(xxx yyy), 'b' => %w(zzz)}
langtag.tag #=> "sl-Latn-rozaj"
langtag.recompose
langtag.tag #=> "sl-Latn-nedis-a-xxx-yyy-b-xxx-x-whatever"

# EOF