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require 'mustermann/router/simple'
module Mustermann
module Router
# Simple pattern based router that allows matching paths to a given Rack application.
#
# @example config.ru
# router = Mustermann::Rack.new do
# on '/' do |env|
# [200, {'Content-Type' => 'text/plain'}, ['Hello World!']]
# end
#
# on '/:name' do |env|
# name = env['mustermann.params']['name']
# [200, {'Content-Type' => 'text/plain'}, ["Hello #{name}!"]]
# end
#
# on '/something/*', call: SomeApp
# end
#
# # in a config.ru
# run router
class Rack < Simple
def initialize(options = {}, &block)
env_prefix = options.delete(:env_prefix) || "mustermann"
params_key = options.delete(:params_key) || "#{env_prefix}.params"
pattern_key = options.delete(:pattern_key) || "#{env_prefix}.pattern"
@params_key, @pattern_key = params_key, pattern_key
options[:default] = [404, {"Content-Type" => "text/plain", "X-Cascade" => "pass"}, ["Not Found"]] unless options.include? :default
super(options, &block)
end
def invoke(callback, env, params, pattern)
params_was, pattern_was = env[@params_key], env[@pattern_key]
env[@params_key], env[@pattern_key] = params, pattern
response = callback.call(env)
response[1].each { |k,v| throw :pass if k.downcase == 'x-cascade' and v == 'pass' }
response
ensure
env[@params_key], env[@pattern_key] = params_was, pattern_was
end
def string_for(env)
env['PATH_INFO']
end
private :invoke, :string_for
end
end
end
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