Class: Rack::JSONP::Callback

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

Instance Method Summary collapse

Constructor Details

#initialize(app, callback_param = 'callback') ⇒ Callback

Returns a new instance of Callback.



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# File 'lib/rack/jsonp/callback.rb', line 4

def initialize(app, callback_param = 'callback')
  @app = app
  @callback_param = callback_param
end

Instance Method Details

#call(env) ⇒ Object



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# File 'lib/rack/jsonp/callback.rb', line 9

def call(env)
  request = Rack::Request.new(env)

  callback = request.params[@callback_param]

  if callback
    env['jsonp.utils.callback'] = callback

    status, headers, response = @app.call(env)

    if headers['Content-Type'].to_s.start_with?('application/json')
      response = pad(callback, response)

      headers['Content-Length'] = response.first.bytesize.to_s
      headers['Content-Type']   = 'application/javascript'

      [200, headers, response]
    else
      [status, headers, response]
    end
  else
    @app.call(env)
  end
end