Class: Rack::EMStream

Inherits:
Object
  • Object
show all
Includes:
EventMachine::Deferrable
Defined in:
lib/rack-emstream.rb,
lib/rack-emstream/version.rb

Constant Summary collapse

VERSION = 
"0.1.4"

Instance Method Summary collapse

Constructor Details

#initialize(app, &block) ⇒ EMStream

Returns a new instance of EMStream.



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# File 'lib/rack-emstream.rb', line 7

def initialize(app, &block)
  @app, @block = app, block
end

Instance Method Details

#_call(env) ⇒ Object 



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# File 'lib/rack-emstream.rb', line 19

def _call(env)
  result = @app.call(env)

  result[2].close if result[2].respond_to?(:close)

  if env['async.callback']
    EM.next_tick {
      env['async.callback'].call [ result[0], result[1], self ]

      begin
        result[2].each { |data|
          EM.next_tick {
            begin
              @callback.call(data)
            rescue => e
              @callback.call(@block.call(e, env)) if @block
            end
          }
        }
      rescue => e
        @callback.call(@block.call(e, env)) if @block
      end

      EM.next_tick { succeed }
    }

    throw :async
  else
    result
  end
end

#call(env) ⇒ Object 



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# File 'lib/rack-emstream.rb', line 15

def call(env)
  dup._call(env)
end

#each(&b) ⇒ Object 



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# File 'lib/rack-emstream.rb', line 11

def each(&b)
  @callback = b
end