Class: Grape::Middleware::Async

Inherits:
Base
  • Object
show all
Defined in:
lib/grape-async/middleware/async.rb

Instance Method Summary collapse

Instance Method Details

#async_call(result) ⇒ Object 



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# File 'lib/grape-async/middleware/async.rb', line 41

def async_call(result)
  if @env['async.callback']
    async_io.call result
  elsif @env['rack.hijack']
    begin
      if result.last.is_a?(Rack::BodyProxy)
        async_io << result.last.body.first
        result.last.close unless result.last.closed?
      elsif result.last.is_a?(Array)
        async_io << result.last.first
      end
    ensure
      EM.stop if endpoint.async_route?(:em)
      @env['rack.hijack'].close
    end
  end
end

#async_io ⇒ Object 



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# File 'lib/grape-async/middleware/async.rb', line 59

def async_io
  @env['async.callback'] || begin
    @env.key?('rack.hijack') ? @env['rack.hijack'].call : nil
  end
end

#call!(env) ⇒ Object 



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# File 'lib/grape-async/middleware/async.rb', line 5

def call!(env)
  @env = env
  if endpoint.async_route? && !async_io.nil?
    if endpoint.async_route?(:em)
      proc = lambda {
        EM.next_tick do
          super
          endpoint.deferred_resp.callback do
            resp = endpoint.file || [endpoint.body]
            async_call [endpoint.status, endpoint.header, resp]
          end
        end
      }
      if !EM.reactor_running?
        EM.run do
          proc.call
        end
      else
        proc.call
      end
    else
      Thread.new do
        result = super
        async_call result
        yield
      end
    end
    
    [-1, {}, []] # Return async response
    
  else
    super

  end
end

#endpoint ⇒ Object 



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# File 'lib/grape-async/middleware/async.rb', line 65

def endpoint
  @env[Grape::Env::API_ENDPOINT]
end