Class: RabbitCage::Filter

Inherits:
Object
  • Object
show all
Defined in:
lib/rabbitcage/filter.rb

Class Method Summary collapse

Class Method Details

.build ⇒ Object 



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# File 'lib/rabbitcage/filter.rb', line 66

def self.build
  require 'erb'
  method = ERB.new(%q[
  def filter(frame)
<%- @rules[:any].each do |rule| -%>
  return :<%= rule[:permission]  %> if <%= rule[:properties] %>
<%- end -%>
<%- @rules.delete(:any) -%>
return :allow if (frame.class == AMQP::Protocol::Header || frame.class == String)
<%- if @rules.any? -%>
  
  case frame  # 4
    <%- @rules.each_pair do |klass, r|-%>
      <%-  next if klass == :any -%>
      when <%= klass %>
        <%- r.each do |rule| -%>
          return :<%= rule[:permission]  %> if <%= rule[:properties] %>
        <%- end -%>
    <%- end -%>
  end
<%- end -%>
:<%= @default %>
  end
  ].gsub!(/^  /,''), nil, '>-%').result(binding)  
LOGGER.debug "Generated filter method:\n#{method}"
RabbitCage::ClientConnection.class_eval method
  
end

.generate_properties(properties, object) ⇒ Object 



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# File 'lib/rabbitcage/filter.rb', line 58

def self.generate_properties(properties, object)
  properties
end

.register(permission, user, action, object, properties) ⇒ Object 



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# File 'lib/rabbitcage/filter.rb', line 20

def self.register permission, user, action, object, properties
  available_actions = {:queue => ['Declare', 'Bind', 'Unbind', 'Delete', 'Purge'],
                       :connection => ['Start', 'StartOk', 'Open', 'Tune', 'TuneOk', 'Close', 'Redirect', 'Secure'],
                       :channel => ['Open', 'Flow', 'Alert', 'Close', 'CloseOk'],
                       :exchange => ['Declare', 'Delete'],
                       :access => ['Request'],
                       :basic => ['Qos', 'Consume', 'Cancel', 'Publish', 'Deliver', 'Get', 'Ack', 'Reject']
                     }
  klass = []
  if action.is_a? Array
    klass = action.collect { |a| "AMQP::Protocol::#{object.camelize}::#{a.camelize}" }.join(',')
  else
    if action == :all && object != :all
      klass = available_actions[object].collect { |x| "AMQP::Protocol::#{object.camelize}::#{x}" }
    elsif action == :all && object == :all
      klass = :any
    elsif action != :all && object == :all
      raise "This acl format is currently not supported"
      exit
    else
      klass = "AMQP::Protocol::#{object.camelize}::#{action.camelize}"
    end
  end
  klass = klass.join(', ') if klass.class == Array
  @rules[klass] = [] unless @rules[klass].class == Array
  
  name = properties.delete(:name)
  properties[object] = name if name
  cond = []
  cond << ('@user =' << (user.is_a?(Regexp) ? "~ #{user.inspect}" : "= '#{user}'"))  if user != :all
    
  properties.each_pair do |p, value|
    cond << ("frame.#{p} =" << (value.is_a?(Regexp) ? "~ #{value.inspect}" : "= '#{value}'"))
  end
  
  @rules[klass] << {:permission => permission, :user => user, :properties => cond.join(' and ') }
end

.set_default(action) ⇒ Object 



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# File 'lib/rabbitcage/filter.rb', line 62

def self.set_default action
  @default = action
end