DigitalOcean 1-Click Rails App - InvalidAuthenticityToken

[2018-08-01T00:08:14.616530 #13285] INFO – : Started POST “/login” for at 2018-08-01 00:08:14 +0000 I, [2018-08-01T00:08:14.628178 #13285] INFO – : Processing by SessionController#create as HTML I, [2018-08-01T00:08:14.629969 #13285] INFO – : Parameters: {“utf8”=>“✓”, “authenticity_token”=>“9d2SwyolmTOHHo21SYVb7R8cGuTG8lCDpN5A/vrs1jr1IHv12yadJ+0YqH6gI4U5JQCZghF3vG0VQnhIdS7htQ==”, “session”=>{“email”=>“”, “password”=>“[FILTERED]”}, “commit”=>“Log in”} W, [2018-08-01T00:08:14.638901 #13285] WARN – : Can’t verify CSRF token authenticity. I, [2018-08-01T00:08:14.639597 #13285] INFO – : Completed 422 Unprocessable Entity in 9ms (ActiveRecord: 0.0ms) F, [2018-08-01T00:08:14.642361 #13285] FATAL – : F, [2018-08-01T00:08:14.642791 #13285] FATAL – : ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):

This webpage works fine on my development box, which doesn’t use Nginx or Unicorn. At first I assumed that maybe I’d forgotten to populate the SECRET_KEY_BASE and that was causing issues, but it seems that the 1-click Rails App does in fact populate the ENV variable for SECRET_KEY_BASE, so I guess that isn’t the problem.

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Accepted Answer

Referencing this link:

I was able to solve the problem.


config.force_ssl = true


set secure: true, optionally only do this for certain Rails environments (e.g., Staging / Production

Rails.application.config.session_store :cookie_store, key: ‘_testapp_session’, secure: true

I then had to also modify the nginx /rails config file, adding

proxy_set_header X-Forwarded-Proto https;

to each location next to the other proxy_set_header’s.

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