Rails: Unable to validate CSRF token

Question

Rails: Unable to validate CSRF token

The My Rails application unexpectedly started producing the following error:

Can't verify CSRF token authenticity
ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):

I haven't made any changes to the application, so I am completely confused as to what is causing this problem. The complete error log is shown below. I took out the authentication token, but confirmed that the token is valid for the current user (by checking in the console).

2015-05-13T01:44:49.038482+00:00 app[web.1]: I, [2015-05-13T01:44:49.038369 #9]  INFO -- : Started POST "/projects?auth_token=xxx" for 76.118.180.235 at 2015-05-13 01:44:49 +0000
2015-05-13T01:44:49.044865+00:00 app[web.1]: I, [2015-05-13T01:44:49.044762 #9]  INFO -- : Completed 422 Unprocessable Entity in 1ms
2015-05-13T01:44:49.119991+00:00 app[web.1]: I, [2015-05-13T01:44:49.119893 #9]  INFO -- : Processing by SpinsController#create as JSON
2015-05-13T01:44:49.120060+00:00 app[web.1]: I, [2015-05-13T01:44:49.119998 #9]  INFO -- :   Parameters: {"spin"=>{}, "auth_token"=>"xxx"}
2015-05-13T01:44:49.120537+00:00 app[web.1]: W, [2015-05-13T01:44:49.120469 #9]  WARN -- : Can't verify CSRF token authenticity
2015-05-13T01:44:49.122935+00:00 app[web.1]: F, [2015-05-13T01:44:49.122841 #9] FATAL -- : 
2015-05-13T01:44:49.122938+00:00 app[web.1]: ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):
2015-05-13T01:44:49.122940+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/request_forgery_protection.rb:181:in `handle_unverified_request'
2015-05-13T01:44:49.122941+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/request_forgery_protection.rb:209:in `handle_unverified_request'
2015-05-13T01:44:49.122943+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/devise-3.4.1/lib/devise/controllers/helpers.rb:251:in `handle_unverified_request'
2015-05-13T01:44:49.122945+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/request_forgery_protection.rb:204:in `verify_authenticity_token'
2015-05-13T01:44:49.122946+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:427:in `block in make_lambda'
2015-05-13T01:44:49.122948+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:163:in `call'
2015-05-13T01:44:49.122949+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:163:in `block in halting'
2015-05-13T01:44:49.122951+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:92:in `call'
2015-05-13T01:44:49.122952+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:92:in `_run_callbacks'
2015-05-13T01:44:49.043562+00:00 app[web.1]: I, [2015-05-13T01:44:49.043425 #9]  INFO -- : Processing by ProjectsController#create as JSON
2015-05-13T01:44:49.043630+00:00 app[web.1]: I, [2015-05-13T01:44:49.043582 #9]  INFO -- :   Parameters: {"project"=>{"name"=>"New Set"}, "auth_token"=>"xxx"}
2015-05-13T01:44:49.044251+00:00 app[web.1]: W, [2015-05-13T01:44:49.044184 #9]  WARN -- : Can't verify CSRF token authenticity
2015-05-13T01:44:49.047524+00:00 app[web.1]: F, [2015-05-13T01:44:49.047435 #9] FATAL -- : 
2015-05-13T01:44:49.047527+00:00 app[web.1]: ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):
2015-05-13T01:44:49.047528+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/request_forgery_protection.rb:181:in `handle_unverified_request'
2015-05-13T01:44:49.122954+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:734:in `_run_process_action_callbacks'
2015-05-13T01:44:49.122955+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:81:in `run_callbacks'
2015-05-13T01:44:49.122957+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/abstract_controller/callbacks.rb:19:in `process_action'
2015-05-13T01:44:49.122959+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/rescue.rb:29:in `process_action'
2015-05-13T01:44:49.122961+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
2015-05-13T01:44:49.122962+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/notifications.rb:164:in `block in instrument'
2015-05-13T01:44:49.122964+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
2015-05-13T01:44:49.047530+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/request_forgery_protection.rb:209:in `handle_unverified_request'
2015-05-13T01:44:49.047532+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/devise-3.4.1/lib/devise/controllers/helpers.rb:251:in `handle_unverified_request'
2015-05-13T01:44:49.047534+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/request_forgery_protection.rb:204:in `verify_authenticity_token'
2015-05-13T01:44:49.047535+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:427:in `block in make_lambda'
2015-05-13T01:44:49.122965+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/notifications.rb:164:in `instrument'
2015-05-13T01:44:49.122968+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
2015-05-13T01:44:49.122969+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
2015-05-13T01:44:49.122971+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.0/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
2015-05-13T01:44:49.122973+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/abstract_controller/base.rb:137:in `process'
2015-05-13T01:44:49.122975+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionview-4.2.0/lib/action_view/rendering.rb:30:in `process'
2015-05-13T01:44:49.122977+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal.rb:195:in `dispatch'
2015-05-13T01:44:49.122979+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
2015-05-13T01:44:49.122981+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal.rb:236:in `block in action'
2015-05-13T01:44:49.123001+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:73:in `call'
2015-05-13T01:44:49.123002+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
2015-05-13T01:44:49.047537+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:163:in `call'
2015-05-13T01:44:49.047538+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:163:in `block in halting'
2015-05-13T01:44:49.047540+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:92:in `call'
2015-05-13T01:44:49.047541+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:92:in `_run_callbacks'
2015-05-13T01:44:49.047543+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:734:in `_run_process_action_callbacks'
2015-05-13T01:44:49.047544+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:81:in `run_callbacks'
2015-05-13T01:44:49.047546+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/abstract_controller/callbacks.rb:19:in `process_action'
2015-05-13T01:44:49.123004+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:42:in `serve'
2015-05-13T01:44:49.123005+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/journey/router.rb:43:in `block in serve'
2015-05-13T01:44:49.123007+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/journey/router.rb:30:in `each'
2015-05-13T01:44:49.123008+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/journey/router.rb:30:in `serve'
2015-05-13T01:44:49.123009+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:802:in `call'
2015-05-13T01:44:49.123011+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:186:in `call!'
2015-05-13T01:44:49.047547+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/rescue.rb:29:in `process_action'
2015-05-13T01:44:49.047549+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
2015-05-13T01:44:49.047550+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/notifications.rb:164:in `block in instrument'
2015-05-13T01:44:49.047551+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
2015-05-13T01:44:49.047553+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/notifications.rb:164:in `instrument'
2015-05-13T01:44:49.047554+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
2015-05-13T01:44:49.047555+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
2015-05-13T01:44:49.123012+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:164:in `call'
2015-05-13T01:44:49.123013+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:186:in `call!'
2015-05-13T01:44:49.123015+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:164:in `call'
2015-05-13T01:44:49.123022+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/builder.rb:59:in `call'
2015-05-13T01:44:49.123023+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/jquery-fileupload-rails-0.4.4/lib/jquery/fileupload/rails/middleware.rb:14:in `_call'
2015-05-13T01:44:49.123025+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/jquery-fileupload-rails-0.4.4/lib/jquery/fileupload/rails/middleware.rb:10:in `call'
2015-05-13T01:44:49.123026+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/warden-1.2.3/lib/warden/manager.rb:35:in `block in call'
2015-05-13T01:44:49.123027+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `catch'
2015-05-13T01:44:49.123029+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `call'
2015-05-13T01:44:49.047556+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.0/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
2015-05-13T01:44:49.047557+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/abstract_controller/base.rb:137:in `process'
2015-05-13T01:44:49.047559+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionview-4.2.0/lib/action_view/rendering.rb:30:in `process'
2015-05-13T01:44:49.047560+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal.rb:195:in `dispatch'
2015-05-13T01:44:49.047561+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
2015-05-13T01:44:49.047562+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_controller/metal.rb:236:in `block in action'
2015-05-13T01:44:49.047564+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:73:in `call'
2015-05-13T01:44:49.047588+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
2015-05-13T01:44:49.123030+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/etag.rb:24:in `call'
2015-05-13T01:44:49.123031+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/conditionalget.rb:38:in `call'
2015-05-13T01:44:49.123033+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/head.rb:13:in `call'
2015-05-13T01:44:49.123034+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/params_parser.rb:27:in `call'
2015-05-13T01:44:49.047589+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:42:in `serve'
2015-05-13T01:44:49.047590+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/journey/router.rb:43:in `block in serve'
2015-05-13T01:44:49.047592+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/journey/router.rb:30:in `each'
2015-05-13T01:44:49.047593+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/journey/router.rb:30:in `serve'
2015-05-13T01:44:49.047594+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:802:in `call'
2015-05-13T01:44:49.047595+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:186:in `call!'
2015-05-13T01:44:49.047597+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:164:in `call'
2015-05-13T01:44:49.047598+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:186:in `call!'
2015-05-13T01:44:49.123035+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/flash.rb:260:in `call'
2015-05-13T01:44:49.123037+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/session/abstract/id.rb:225:in `context'
2015-05-13T01:44:49.047599+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/strategy.rb:164:in `call'
2015-05-13T01:44:49.047610+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/omniauth-1.2.2/lib/omniauth/builder.rb:59:in `call'
2015-05-13T01:44:49.047612+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/jquery-fileupload-rails-0.4.4/lib/jquery/fileupload/rails/middleware.rb:14:in `_call'
2015-05-13T01:44:49.047613+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/jquery-fileupload-rails-0.4.4/lib/jquery/fileupload/rails/middleware.rb:10:in `call'
2015-05-13T01:44:49.047614+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/warden-1.2.3/lib/warden/manager.rb:35:in `block in call'
2015-05-13T01:44:49.047616+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `catch'
2015-05-13T01:44:49.047617+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `call'
2015-05-13T01:44:49.123038+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/session/abstract/id.rb:220:in `call'
2015-05-13T01:44:49.123039+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/cookies.rb:560:in `call'
2015-05-13T01:44:49.123041+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.0/lib/active_record/query_cache.rb:36:in `call'
2015-05-13T01:44:49.123042+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:647:in `call'
2015-05-13T01:44:49.123044+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
2015-05-13T01:44:49.123045+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:88:in `call'
2015-05-13T01:44:49.047618+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/etag.rb:24:in `call'
2015-05-13T01:44:49.047620+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/conditionalget.rb:38:in `call'
2015-05-13T01:44:49.047621+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/head.rb:13:in `call'
2015-05-13T01:44:49.047623+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/params_parser.rb:27:in `call'
2015-05-13T01:44:49.047624+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/flash.rb:260:in `call'
2015-05-13T01:44:49.047625+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/session/abstract/id.rb:225:in `context'
2015-05-13T01:44:49.047627+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/session/abstract/id.rb:220:in `call'
2015-05-13T01:44:49.047628+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/cookies.rb:560:in `call'
2015-05-13T01:44:49.123046+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:88:in `_run_callbacks'
2015-05-13T01:44:49.123048+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:734:in `_run_call_callbacks'
2015-05-13T01:44:49.123049+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:81:in `run_callbacks'
2015-05-13T01:44:49.123050+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
2015-05-13T01:44:49.047630+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.0/lib/active_record/query_cache.rb:36:in `call'
2015-05-13T01:44:49.123051+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
2015-05-13T01:44:49.123053+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
2015-05-13T01:44:49.123054+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
2015-05-13T01:44:49.123055+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/railties-4.2.0/lib/rails/rack/logger.rb:38:in `call_app'
2015-05-13T01:44:49.123056+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/railties-4.2.0/lib/rails/rack/logger.rb:22:in `call'
2015-05-13T01:44:49.047631+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activerecord-4.2.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:647:in `call'
2015-05-13T01:44:49.047632+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
2015-05-13T01:44:49.047633+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:88:in `call'
2015-05-13T01:44:49.047635+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:88:in `_run_callbacks'
2015-05-13T01:44:49.047636+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:734:in `_run_call_callbacks'
2015-05-13T01:44:49.047637+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/callbacks.rb:81:in `run_callbacks'
2015-05-13T01:44:49.047638+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
2015-05-13T01:44:49.123058+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/request_id.rb:21:in `call'
2015-05-13T01:44:49.123059+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/methodoverride.rb:22:in `call'
2015-05-13T01:44:49.123060+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/runtime.rb:18:in `call'
2015-05-13T01:44:49.123062+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
2015-05-13T01:44:49.123063+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/sendfile.rb:113:in `call'
2015-05-13T01:44:49.123064+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/railties-4.2.0/lib/rails/engine.rb:518:in `call'
2015-05-13T01:44:49.123065+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/railties-4.2.0/lib/rails/application.rb:164:in `call'
2015-05-13T01:44:49.047639+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
2015-05-13T01:44:49.047641+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
2015-05-13T01:44:49.047642+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
2015-05-13T01:44:49.047643+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/railties-4.2.0/lib/rails/rack/logger.rb:38:in `call_app'
2015-05-13T01:44:49.047644+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/railties-4.2.0/lib/rails/rack/logger.rb:22:in `call'
2015-05-13T01:44:49.047645+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/actionpack-4.2.0/lib/action_dispatch/middleware/request_id.rb:21:in `call'
2015-05-13T01:44:49.047646+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/methodoverride.rb:22:in `call'
2015-05-13T01:44:49.123067+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:576:in `process_client'
2015-05-13T01:44:49.123068+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:670:in `worker_loop'
2015-05-13T01:44:49.123070+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:525:in `spawn_missing_workers'
2015-05-13T01:44:49.123071+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:140:in `start'
2015-05-13T01:44:49.123072+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/bin/unicorn:126:in `<top (required)>'
2015-05-13T01:44:49.123074+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/bin/unicorn:23:in `load'
2015-05-13T01:44:49.123076+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/bin/unicorn:23:in `<main>'
2015-05-13T01:44:49.123078+00:00 app[web.1]: 
2015-05-13T01:44:49.047648+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/runtime.rb:18:in `call'
2015-05-13T01:44:49.123079+00:00 app[web.1]: 
2015-05-13T01:44:49.047649+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.0/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
2015-05-13T01:44:49.047650+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/rack-1.6.0/lib/rack/sendfile.rb:113:in `call'
2015-05-13T01:44:49.047651+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/railties-4.2.0/lib/rails/engine.rb:518:in `call'
2015-05-13T01:44:49.047653+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/railties-4.2.0/lib/rails/application.rb:164:in `call'
2015-05-13T01:44:49.047654+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:576:in `process_client'
2015-05-13T01:44:49.047655+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:670:in `worker_loop'
2015-05-13T01:44:49.047656+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:525:in `spawn_missing_workers'
2015-05-13T01:44:49.047657+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/lib/unicorn/http_server.rb:140:in `start'
2015-05-13T01:44:49.047658+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.3/bin/unicorn:126:in `<top (required)>'
2015-05-13T01:44:49.047660+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/bin/unicorn:23:in `load'
2015-05-13T01:44:49.047661+00:00 app[web.1]:   vendor/bundle/ruby/2.0.0/bin/unicorn:23:in `<main>'

As I'm sure the site was working 3 days ago, I returned the code thinking that there might have been an update for the Gem I was using might have caused this issue. But it didn't seem to fix the problem.

Does anyone else encounter a similar error, and if so, do you know how to fix it? I've already tried several suggestions from various StackOverflow posts to no avail (for example adding to my application_controller.rb "protect_from_forgery with :: null_session")

I currently have the following in my session controller:

class SessionsController < ApplicationController
  skip_before_filter :verify_authenticity_token,
                     :if => Proc.new { |c| c.request.format == 'application/json' }

And I have the following line in my application.html.erb

  <%= csrf_meta_tags %>

After some suggestions, I added the following to my application_controller.rb:

 before_filter :cor
  rescue_from ActionController::InvalidAuthenticityToken, :with => :bad_token

 def bad_token
    Rails.logger.debug("session expired!")
  end


  private
  def cor
    headers["Access-Control-Allow-Origin"]  = "*"
    headers["Access-Control-Allow-Methods"] = %w{GET POST PUT DELETE}.join(",")
    headers["Access-Control-Allow-Headers"] = %w{Origin Accept Content-Type X-Requested-With X-CSRF-Token}.join(",")
    head(:ok) if request.request_method == "OPTIONS"
  end

However, I still get the same error, albeit shorter:

2015-05-13T02:45:26.893689+00:00 app[web.2]: I, [2015-05-13T02:45:26.893643 #6]  INFO -- :   Parameters: {"spin"=>{}, "auth_token"=>"xxx"}
2015-05-13T02:45:26.895581+00:00 app[web.2]: W, [2015-05-13T02:45:26.893966 #6]  WARN -- : Can't verify CSRF token authenticity
2015-05-13T02:45:26.895583+00:00 app[web.2]: I, [2015-05-13T02:45:26.894210 #6]  INFO -- : Completed 200 OK in 0ms (ActiveRecord: 0.0ms)
2015-05-13T02:45:26.728920+00:00 app[web.2]: I, [2015-05-13T02:45:26.728852 #12]  INFO -- : Processing by ProjectsController#create as JSON
2015-05-13T02:45:26.729261+00:00 app[web.2]: W, [2015-05-13T02:45:26.729155 #12]  WARN -- : Can't verify CSRF token authenticity
2015-05-13T02:45:26.729430+00:00 app[web.2]: I, [2015-05-13T02:45:26.729380 #12]  INFO -- : Completed 200 OK in 0ms (ActiveRecord: 0.0ms)
2015-05-13T02:45:26.890043+00:00 app[web.2]: I, [2015-05-13T02:45:26.889933 #6]  INFO -- : Started POST "/spins?auth_token=ArpuyxbDyjtyn67r3JgF" for 76.118.180.235 at 2015-05-13 02:45:26 +0000
2015-05-13T02:45:26.888494+00:00 heroku[router]: at=info method=POST path="/spins?auth_token=ArpuyxbDyjtyn67r3JgF" host=spin360-staging.herokuapp.com request_id=5edd715a-a01d-4558-9aa3-7f2c2c3dc927 fwd="76.118.180.235" dyno=web.2 connect=1ms service=8ms status=200 bytes=324

+3

ruby ruby-on-rails csrf authenticity-token devise

scientiffic May 13 '15 at 1:54

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4 answers

Alex · Answer 1 · 2015-05-13T02:06:22+0000

This often happens especially with crawlers or API calls from other applications or ping services (such as pingdom).

To allow cross domain request (if you have API in your website or some other service for external application) you can add this code to your application_controller.rb

# API POST REGUEST ALLOW CROSS DOMAIN
  before_filter :cor
  def cor
    headers["Access-Control-Allow-Origin"]  = "*"
    headers["Access-Control-Allow-Methods"] = %w{GET POST PUT DELETE}.join(",")
    headers["Access-Control-Allow-Headers"] = %w{Origin Accept Content-Type X-Requested-With X-CSRF-Token}.join(",")
    head(:ok) if request.request_method == "OPTIONS"
  end

If you don't have API this error might have simple expired session problem, just add this code to your application_controller.rb

# Resque form for invalid authentificitytoken
  rescue_from ActionController::InvalidAuthenticityToken, :with => :bad_token
  def bad_token
    flash[:warning] = "Session expired"
    redirect_to root_path
  end

Better to add second code anyway to check for expired session and not show rails error to user. Showing a generic rails error when ActionController :: InvalidAuthenticityToken confuses people because it is not a site error.

Shahzad tariq · Answer 2 · 2015-05-13T05:41:35+0000

We run into the same problem and end up using a rack pearl. This allows for great flexibility.

Just add this line to Gemfile

gem 'rack-cors', :require => 'rack/cors'

and then run the command to install the package. There are many configuration options available. For more details https://github.com/cyu/rack-cors

vtamara · Answer 3 · 2015-10-12T21:37:51+0000

Enable cookies in your browser.

I had the same problem using w3m

version 0.5.3 on adJ OpenBSD 5.7 distribution. The app worked again for me when I enabled cookies in w3m using the option -cookie

:

w3m --cookie http://127.0.0.1:3000

jkwok · Answer 4 · 2017-10-02T22:36:19+0000

A bit late for the party, but in case anyone else is looking for a solution.

Are you making a POST request to ProjectsController#create

? If so, try adding

protect_from_forgery with: :null_session, only: [:create]

at the top ProjectsController

. Functionally it should be the same as skip_before_action :verify_authenticity_token

, but not sure if you are inheriting from ApplicationController

. If you want to add your Proc check you can do

protect_from_forgery with: :null_session,
    if: Proc.new { |c| c.request.format =~ %r{application/json} }

Rails: Unable to validate CSRF token

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