Improvements

Track 404, forward DNT header if present

lib/rakwik/tracker.rb

@@ -1,12 +1,13 @@
 require 'em-http'
-require 'pp'
 
 module Rakwik
   class Tracker
 
     include Rack::Response::Helpers
 
-    DEFAULT = {}
+    DEFAULT = {
+      :track_404 => true
+    }
 
     def initialize(app, options = {})
       @app, @options = app, DEFAULT.merge(options)
@@ -16,11 +17,15 @@ def initialize(app, options = {})
 
     def call(env)
       @status, @headers, @body = @app.call(env)
-      track Rack::Request.new(env) if ok?
+      track Rack::Request.new(env) if track?
       [@status, @headers, @body]
     end
 
     private
+
+    def track?
+      ok? || (not_found? && @options[:track_404] === true)
+    end
 
     def piwik_url
       @options[:piwik_url]
@@ -33,23 +38,39 @@ def piwik_id
     def token_auth
       @options[:token_auth]
     end
-
-    def track(request)
+    
+    def extract(request)
       header = {
-        'User-Agent' => request.user_agent,
-        'Accept-Language' => request.env["HTTP_ACCEPT_LANGUAGE"]
+        'User-Agent' => request.user_agent
       }
+      header['Accept-Language'] = request.env["HTTP_ACCEPT_LANGUAGE"] unless request.env["HTTP_ACCEPT_LANGUAGE"].nil?
+      header['DNT'] = request.env["HTTP_DNT"] unless request.env["HTTP_DNT"].nil?
       data = {
         'idsite'     => piwik_id,
         'token_auth' => token_auth,
         'rec'        => 1,
         'url'        => request.url,
         'cip'        => request.ip,
+        'rand'       => rand(1000000),
         'apiv'       => 1
       }
       data['urlref'] = request.referer unless request.referer.nil?
+
+      if not_found? && @options[:track_404] === true
+        data['action_name'] = "404/URL = #{data['url']}/FROM= #{data['urlref']}"
+      end
+
+      [header, data]
+    end
+
+    def track(request)
+      h, d = extract(request)
       EventMachine.schedule do
-        http = connection(piwik_url).get :head => header, :query => data
+        http = connection(piwik_url).get :head => h, :query => d
+        http.errback {
+          time = Time.now.strftime("%Y-%m-%d %H:%M:%S")
+          request.env['rack.errors'].puts "[#{time}] ERROR Rakwik::Tracker: #{http.error}"
+        }
       end
     end