# Problem viewing my hello world app **URL:** \ **Category:** Rails\ **Created:** [November 26, 2008, 10:23pm UTC](https://www.ruby-forum.com/t/problem-viewing-my-hello-world-app/154259 "2008-11-26T22:23:38Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![mrmaster](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/7ea924/32.png) [@mrmaster](https://www.ruby-forum.com/u/mrmaster)\ **Post date:** [November 26, 2008, 10:23pm UTC](https://www.ruby-forum.com/t/problem-viewing-my-hello-world-app/154259/1 "2008-11-26T22:23:38Z")
Hi, I’ve created a hello world app that i want to view but i get CGI::Session::CookieStore::TamperedWithCookie error in the browser when i run it. I copied everything in my browswer below and I’ve also listed the steps I took in creating the hello world. My steps: 1. rails hello 2. generated a controller: ./script/generate controller salutation 3. created an action by modifying salutation\_controller.rb file in app/controller dir. class SalutationController \< ApplicationController def hello @message = ‘hello world!’ end end 4. created an rhtml template in app/view/salutation/ called hello.rhtml using code below: # \<%= @message %\> 5. typed http://localhost:3000/salutation/hello in firefox 3.0.4 browser. ## I’m using ubunut 8.10 and rails 2.2.2 and i had webrick running with server/script command. CGI::Session::CookieStore::TamperedWithCookie in SalutationController#hello CGI::Session::CookieStore::TamperedWithCookie RAILS\_ROOT: /home/mrmaster/Desktop/hello Application Trace | Framework Trace | Full Trace vendor/rails/actionpack/lib/action\_controller/session/cookie\_store.rb:144:in `unmarshal' vendor/rails/actionpack/lib/action_controller/session/cookie_store.rb:101:in`restore’ /usr/lib/ruby/1.8/cgi/session.rb:310:in `[]' vendor/rails/actionpack/lib/action_controller/cgi_process.rb:136:in`session’ vendor/rails/actionpack/lib/action\_controller/cgi\_process.rb:168:in `stale_session_check!' vendor/rails/actionpack/lib/action_controller/cgi_process.rb:116:in`session’ vendor/rails/actionpack/lib/action\_controller/base.rb:1135:in `assign_shortcuts_without_flash' vendor/rails/actionpack/lib/action_controller/flash.rb:166:in`assign\_shortcuts’ vendor/rails/actionpack/lib/action\_controller/base.rb:523:in `process_without_filters' vendor/rails/actionpack/lib/action_controller/filters.rb:569:in`process\_without\_session\_management\_support’ vendor/rails/actionpack/lib/action\_controller/session\_management.rb:130:in `process' vendor/rails/actionpack/lib/action_controller/base.rb:389:in`process’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:149:in `handle_request' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:107:in`dispatch’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:104:in `synchronize' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:in`dispatch’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:120:in `dispatch_cgi' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:35:in`dispatch’ vendor/rails/railties/lib/webrick\_server.rb:112:in `handle_dispatch' vendor/rails/railties/lib/webrick_server.rb:78:in`service’ /usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' /usr/lib/ruby/1.8/webrick/httpserver.rb:65:in`run’ /usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' /usr/lib/ruby/1.8/webrick/server.rb:162:in`start’ /usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' /usr/lib/ruby/1.8/webrick/server.rb:95:in`start’ /usr/lib/ruby/1.8/webrick/server.rb:92:in `each' /usr/lib/ruby/1.8/webrick/server.rb:92:in`start’ /usr/lib/ruby/1.8/webrick/server.rb:23:in `start' /usr/lib/ruby/1.8/webrick/server.rb:82:in`start’ vendor/rails/railties/lib/webrick\_server.rb:62:in `dispatch' vendor/rails/railties/lib/commands/servers/webrick.rb:66 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in`gem\_original\_require’ /usr/local/lib/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `require' vendor/rails/activesupport/lib/active_support/dependencies.rb:509:in`require’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:354:in `new_constants_in' vendor/rails/activesupport/lib/active_support/dependencies.rb:509:in`require’ vendor/rails/railties/lib/commands/server.rb:39 /usr/local/lib/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `gem_original_require' /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in`require’ script/server:3 vendor/rails/actionpack/lib/action\_controller/session/cookie\_store.rb:144:in `unmarshal' vendor/rails/actionpack/lib/action_controller/session/cookie_store.rb:101:in`restore’ /usr/lib/ruby/1.8/cgi/session.rb:310:in `[]' vendor/rails/actionpack/lib/action_controller/cgi_process.rb:136:in`session’ vendor/rails/actionpack/lib/action\_controller/cgi\_process.rb:168:in `stale_session_check!' vendor/rails/actionpack/lib/action_controller/cgi_process.rb:116:in`session’ vendor/rails/actionpack/lib/action\_controller/base.rb:1135:in `assign_shortcuts_without_flash' vendor/rails/actionpack/lib/action_controller/flash.rb:166:in`assign\_shortcuts’ vendor/rails/actionpack/lib/action\_controller/base.rb:523:in `process_without_filters' vendor/rails/actionpack/lib/action_controller/filters.rb:569:in`process\_without\_session\_management\_support’ vendor/rails/actionpack/lib/action\_controller/session\_management.rb:130:in `process' vendor/rails/actionpack/lib/action_controller/base.rb:389:in`process’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:149:in `handle_request' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:107:in`dispatch’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:104:in `synchronize' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:in`dispatch’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:120:in `dispatch_cgi' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:35:in`dispatch’ vendor/rails/railties/lib/webrick\_server.rb:112:in `handle_dispatch' vendor/rails/railties/lib/webrick_server.rb:78:in`service’ /usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' /usr/lib/ruby/1.8/webrick/httpserver.rb:65:in`run’ /usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' /usr/lib/ruby/1.8/webrick/server.rb:162:in`start’ /usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' /usr/lib/ruby/1.8/webrick/server.rb:95:in`start’ /usr/lib/ruby/1.8/webrick/server.rb:92:in `each' /usr/lib/ruby/1.8/webrick/server.rb:92:in`start’ /usr/lib/ruby/1.8/webrick/server.rb:23:in `start' /usr/lib/ruby/1.8/webrick/server.rb:82:in`start’ vendor/rails/railties/lib/webrick\_server.rb:62:in `dispatch' vendor/rails/railties/lib/commands/servers/webrick.rb:66 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in`gem\_original\_require’ /usr/local/lib/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `require' vendor/rails/activesupport/lib/active_support/dependencies.rb:509:in`require’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:354:in `new_constants_in' vendor/rails/activesupport/lib/active_support/dependencies.rb:509:in`require’ vendor/rails/railties/lib/commands/server.rb:39 /usr/local/lib/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `gem_original_require' /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in`require’ script/server:3 Request Parameters: None Show session dump * * * flash: !map:ActionController::Flash::FlashHash {} Response Headers: {“cookie”=\>[], “Cache-Control”=\>“no-cache”} ---
**Author:** ![mrmaster](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/7ea924/32.png) [@mrmaster](https://www.ruby-forum.com/u/mrmaster)\ **Post date:** [November 26, 2008, 11:56pm UTC](https://www.ruby-forum.com/t/problem-viewing-my-hello-world-app/154259/2 "2008-11-26T23:56:26Z")
That’s usually an indication that the cookie associated with the localhost session (in your case it will have a name like “\_hello\_session”) is different from the one your current session is trying to create. Use the firefox-\>preferences-\>privacy-\>show cookies to remove the localhost cookie and reload the page. Rick On Nov 26, 11:23 am, Mrmaster M. \