Class: Volt::MiddlewareStack

Inherits:
Object
  • Object
show all
Defined in:
lib/volt/server/middleware/middleware_stack.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ MiddlewareStack

Returns a new instance of MiddlewareStack.



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# File 'lib/volt/server/middleware/middleware_stack.rb', line 9

def initialize
  # Setup the next app
  @middlewares = []
end

Instance Attribute Details

#middlewares ⇒ Object (readonly)

Returns the value of attribute middlewares.



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# File 'lib/volt/server/middleware/middleware_stack.rb', line 7

def middlewares
  @middlewares
end

Instance Method Details

#build ⇒ Object

Builds a new Rack::Builder with the middleware and the app



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# File 'lib/volt/server/middleware/middleware_stack.rb', line 33

def build
  @builder = Rack::Builder.new

  @middlewares.each do |middleware|
    if middleware[0] == :map
      @builder.map(middleware[1], &middleware[2])
    else
      @builder.use(*middleware[0], &middleware[1])
    end
  end

  @builder.run(@app)
end

#call(env) ⇒ Object 



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# File 'lib/volt/server/middleware/middleware_stack.rb', line 47

def call(env)
  unless @builder
    build
  end

  @builder.call(env)
end

#map(path, &block) ⇒ Object 



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# File 'lib/volt/server/middleware/middleware_stack.rb', line 21

def map(path, &block)
  @middlewares << [:map, path, block]

  # invalidate builder
  @builder = nil
end

#run(app) ⇒ Object 



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# File 'lib/volt/server/middleware/middleware_stack.rb', line 28

def run(app)
  @app = app
end

#use(*args, &block) ⇒ Object 



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# File 'lib/volt/server/middleware/middleware_stack.rb', line 14

def use(*args, &block)
  @middlewares << [args, block]

  # invalidate builder, so it gets built again
  @builder = nil
end