How to rescue OmniAuth::Strategies::OAuth2::CallbackError?

Question

I am building a Rails application with Omniauth for log in service.To authenticate Google I am using OmniAuth Google OAuth2 Strategy.

When user clicks \'allow access\' b

Answer 1

There's a configuration to use /auth/failure instead of raising an error.

I use OmniAuth 1.2.2 and when I checking the FailureEndpoint I found the code is like this:

def call
  raise_out! if OmniAuth.config.failure_raise_out_environments.include?(ENV['RACK_ENV'].to_s)
  redirect_to_failure
end

And the failure_raise_out_environments is defined here:

def self.defaults
  @defaults ||= {
    # other configurations
    :failure_raise_out_environments => ['development']
  }
end

The environment can be configured so the solution is easy. I use Rails so I put below code in an initializer file:

OmniAuth.configure do |config|
  # Always use /auth/failure in any environment
  config.failure_raise_out_environments = []
end