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module OmniAuth
# This simple Rack endpoint that serves as the default
# 'failure' mechanism for OmniAuth. If a strategy fails for
# any reason this endpoint will be invoked. The default behavior
# is to redirect to `/auth/failure` except in the case of
# a development `RACK_ENV`, in which case an exception will
# be raised.
class FailureEndpoint
attr_reader :env
def self.call(env)
new(env).call
end
def initialize(env)
@env = env
end
def call
raise_out! if OmniAuth.config.failure_raise_out_environments.include?(ENV['RACK_ENV'].to_s)
redirect_to_failure
end
def raise_out!
raise(env['omniauth.error'] || OmniAuth::Error.new(env['omniauth.error.type']))
end
def redirect_to_failure
message_key = env['omniauth.error.type']
new_path = "#{env['SCRIPT_NAME']}#{OmniAuth.config.path_prefix}/failure?message=#{message_key}#{origin_query_param}#{strategy_name_query_param}"
Rack::Response.new(['302 Moved'], 302, 'Location' => new_path).finish
end
def strategy_name_query_param
return '' unless env['omniauth.error.strategy']
"&strategy=#{env['omniauth.error.strategy'].name}"
end
def origin_query_param
return '' unless env['omniauth.origin']
"&origin=#{Rack::Utils.escape(env['omniauth.origin'])}"
end
end
end