Class: Crawlable::Rack

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

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Rack

Returns a new instance of Rack.



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# File 'lib/crawlable/rack.rb', line 4

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/crawlable/rack.rb', line 8

def call(env)
  if using_heroku?(env) || true
    if file = Crawlable::Sitemap.find(env['REQUEST_PATH'], heroku_writable_directory)
      return sitemap(file)
    elsif file = Crawlable::Feed.find(env['REQUEST_PATH'], heroku_writable_directory)
      return feed(file)
    end
  end
  @app.call(env)
end

#feed(file) ⇒ Object 



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# File 'lib/crawlable/rack.rb', line 23

def feed(file)
  [200, { 'Cache-Control'  => 'public, max-age=86400', 'Content-Length' => File.size(file).to_s, 'Content-Type'   => 'text/xml' }, IO.read(file)]
end

#heroku_writable_directory ⇒ Object 



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# File 'lib/crawlable/rack.rb', line 27

def heroku_writable_directory
  "#{Rails.root}/tmp"
end

#sitemap(file) ⇒ Object 



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# File 'lib/crawlable/rack.rb', line 19

def sitemap(file)
  [200, { 'Cache-Control'  => 'public, max-age=86400', 'Content-Length' => File.size(file).to_s, 'Content-Type'   => 'text/xml' }, IO.read(file)]
end

#using_heroku?(env) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/crawlable/rack.rb', line 31

def using_heroku?(env)
  if env["HEROKU"].nil?
    if env["HEROKU_PORT"].nil? && ENV["HEROKU_TYPE"].nil?
      env["HEROKU"] = false
    else
      env["HEROKU"] = true
    end
  end
  
  env["HEROKU"] == true
end