Contents

# frozen_string_literal: true

# Originally from:
# https://github.com/rkh/mustermann/blob/500a603fffe0594ab842d72addcc449eedd6d5be/mustermann/lib/mustermann/router/rack.rb
# Copied here after its removal from Mustermann proper

require 'praxis/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(env_prefix: 'mustermann', params_key: "#{env_prefix}.params", pattern_key: "#{env_prefix}.pattern", **options, &block)
        @params_key = params_key
        @pattern_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 = env[@params_key]
        pattern_was = env[@pattern_key]
        env[@params_key] = params
        env[@pattern_key] = pattern
        response = callback.call(env)
        response[1].each { |k, v| throw :pass if (k.downcase == 'x-cascade') && (v == 'pass') }
        response
      ensure
        env[@params_key] = params_was
        env[@pattern_key] = pattern_was
      end

      def string_for(env)
        env['PATH_INFO']
      end

      private :invoke, :string_for
    end
  end
end

Version data entries

23 entries across 23 versions & 1 rubygems

Version	Path
praxis-2.0.pre.21	lib/praxis/router/rack.rb
praxis-2.0.pre.20	lib/praxis/router/rack.rb
praxis-2.0.pre.19	lib/praxis/router/rack.rb