Record the referer url on open events

app/controllers/deliveries_controller.rb

@@ -1,6 +1,9 @@
 class DeliveriesController < ApplicationController
   def open_track
-    Delivery.find_by!(open_tracked_hash: params[:hash]).open_events.create!(user_agent: request.env['HTTP_USER_AGENT'])
+    Delivery.find_by!(open_tracked_hash: params[:hash]).open_events.create!(
+      user_agent: request.env['HTTP_USER_AGENT'],
+      referer: request.referer
+    )
     # TODO Check that we are asking for a gif and only accept those for the time being
     # This sends a 1x1 transparent gif
     send_data(Base64.decode64("R0lGODlhAQABAPAAAAAAAAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="), :type => "image/gif", :disposition => "inline")

app/views/deliveries/_delivery.html.haml

@@ -27,6 +27,7 @@
         %tr
           %th Time
           %th User agent
+          %th Referer
           %th Client
           %th OS
       %tbody
@@ -36,6 +37,7 @@
               = time_ago_in_words(event.created_at)
               ago
             %td= event.user_agent
+            %td= event.referer
             %td
               = link_to event.ua_family, event.ua_url
             %td

db/migrate/20130418095518_add_referer_to_open_events.rb

@@ -0,0 +1,5 @@
+class AddRefererToOpenEvents < ActiveRecord::Migration
+  def change
+    add_column :open_events, :referer, :text
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20130418054241) do
+ActiveRecord::Schema.define(version: 20130418095518) do
 
   create_table "addresses", force: true do |t|
     t.string   "text"
@@ -68,6 +68,7 @@
     t.datetime "created_at"
     t.datetime "updated_at"
     t.text     "user_agent"
+    t.text     "referer"
   end
 
   create_table "postfix_log_lines", force: true do |t|