class Rack::GoogleAnalytics
Constants
- DEFAULT
- EVENT_TRACKING_KEY
- VERSION
Public Class Methods
new(app, options = {})
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# File lib/rack/google-analytics.rb, line 11 def initialize(app, options = {}) @app, @options = app, DEFAULT.merge(options) end
Public Instance Methods
_call(env)
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# File lib/rack/google-analytics.rb, line 17 def _call(env) @status, @headers, @body = @app.call(env) return [@status, @headers, @body] unless html? response = Rack::Response.new([], @status, @headers) @options[:tracker_vars] = env["google_analytics.custom_vars"] || [] if response.ok? # Write out the events now @options[:tracker_vars] += (env[EVENT_TRACKING_KEY]) unless env[EVENT_TRACKING_KEY].nil? # Get any stored events from a redirection session = env["rack.session"] stored_events = session.delete(EVENT_TRACKING_KEY) if session @options[:tracker_vars] += stored_events unless stored_events.nil? elsif response.redirection? && env["rack.session"] # Store the events until next time env["rack.session"][EVENT_TRACKING_KEY] = env[EVENT_TRACKING_KEY] end @options[:tracker] = expand_tracker(env, @options[:tracker]) @body.each { |fragment| response.write inject(fragment) } @body.close if @body.respond_to?(:close) response.finish end
call(env)
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# File lib/rack/google-analytics.rb, line 15 def call(env); dup._call(env); end
Private Instance Methods
expand_tracker(env, tracker)
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# File lib/rack/google-analytics.rb, line 55 def expand_tracker(env, tracker) tracker.respond_to?(:call) ? tracker.call(env) : tracker end
html?()
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# File lib/rack/google-analytics.rb, line 46 def html?; @headers['Content-Type'] =~ /html/; end
inject(response)
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# File lib/rack/google-analytics.rb, line 48 def inject(response) @tracker_options = { cookieDomain: @options[:domain] }.select{|k,v| v }.to_json @template ||= ::ERB.new ::File.read ::File.expand_path("../templates/async.erb",__FILE__) response.gsub(%r{</head>}, @template.result(binding) + "</head>") end