Class: Rack::MonetaRest

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

Overview

A Rack application which provides a REST interface to a Moneta store.

Examples:

config.ru

map '/moneta' do
  run Rack::MonetaRest.new(:Memory)
end

config.ru

# Pass it a block like the one passed to Moneta.build
run Rack::MonetaRest.new do
  use :Transformer, value: :zlib
  adapter :Memory
end

Instance Method Summary collapse

Constructor Details

#initialize(store = nil, options = {}, &block) ⇒ MonetaRest

Returns a new instance of MonetaRest.



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# File 'lib/rack/moneta_rest.rb', line 20

def initialize(store = nil, options = {}, &block)
  if block
    raise ArgumentError, 'Use either block or options' unless options.empty?
    @store = ::Moneta.build(&block)
  else
    raise ArgumentError, 'Block or argument store is required' unless @store = store
    @store = ::Moneta.new(@store, options) if Symbol === @store
  end
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/moneta_rest.rb', line 30

def call(env)
  key = env['PATH_INFO'][1..-1].to_s
  case env['REQUEST_METHOD']
  when 'HEAD'
    if key.empty?
      respond(400, 'Empty key')
    elsif @store.key?(key)
      empty(200)
    else
      empty(404)
    end
  when 'GET'
    if key.empty?
      respond(400, 'Empty key')
    elsif value = @store[key]
      respond(200, value)
    else
      empty(404)
    end
  when 'POST', 'PUT'
    if key.empty?
      respond(400, 'Empty key')
    else
      respond(200, @store[key] = env['rack.input'].read)
    end
  when 'DELETE'
    if key.empty?
      @store.clear
      empty(200)
    else
      respond(200, @store.delete(key))
    end
  else
    respond(400, 'Bad method')
  end
rescue => ex
  respond(500, "Exception: #{ex.message}")
end