Class: Shrimp::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/shrimp/middleware.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, options = { }, conditions = { }) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/shrimp/middleware.rb', line 3

def initialize(app, options = { }, conditions = { })
  @app                        = app
  @options                    = options
  @conditions                 = conditions
  @options[:polling_interval] ||= 1
  @options[:polling_offset]   ||= 1
  @options[:cache_ttl]        ||= 1
  @options[:request_timeout]  ||= @options[:polling_interval] * 10
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/shrimp/middleware.rb', line 13

def call(env)
  @request = Rack::Request.new(env)
  if render_as_pdf? #&& headers['Content-Type'] =~ /text\/html|application\/xhtml\+xml/
    if already_rendered? && (up_to_date?(@options[:cache_ttl]) || @options[:cache_ttl] == 0)
      if File.size(render_to) == 0
        File.delete(render_to)
        remove_rendering_flag
        return error_response
      end
      return ready_response if env['HTTP_X_REQUESTED_WITH']
      file = File.open(render_to, "rb")
      body = file.read
      file.close
      File.delete(render_to) if @options[:cache_ttl] == 0
      remove_rendering_flag
      response                  = [body]
      headers                   = { }
      headers["Content-Length"] = (body.respond_to?(:bytesize) ? body.bytesize : body.size).to_s
      headers["Content-Type"]   = "application/pdf"
      [200, headers, response]
    else
      if rendering_in_progress?
        if rendering_timed_out?
          remove_rendering_flag
          error_response
        else
          reload_response(@options[:polling_interval])
        end
      else
        File.delete(render_to) if already_rendered?
        set_rendering_flag
        fire_phantom
        reload_response(@options[:polling_offset])
      end
    end
  else
    @app.call(env)
  end
end