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# frozen_string_literal: true
class Rack::Attack
# Always allow requests from localhost
# (blocklist & throttles are skipped)
Rack::Attack.safelist('allow from localhost') do |req|
# Requests are allowed if the return value is truthy
'127.0.0.1' == req.ip || '::1' == req.ip
end
# Rate limits for the API
throttle('api', limit: 300, period: 5.minutes) do |req|
req.ip if req.path =~ /\A\/api\/v/
end
# Rate limit logins
throttle('login', limit: 5, period: 5.minutes) do |req|
req.ip if req.path == '/auth/sign_in' && req.post?
end
# Rate limit sign-ups
throttle('register', limit: 5, period: 5.minutes) do |req|
req.ip if req.path == '/auth' && req.post?
end
# Rate limit forgotten passwords
throttle('reminder', limit: 5, period: 5.minutes) do |req|
req.ip if req.path == '/auth/password' && req.post?
end
self.throttled_response = lambda do |env|
now = Time.now.utc
match_data = env['rack.attack.match_data']
headers = {
'Content-Type' => 'application/json',
'X-RateLimit-Limit' => match_data[:limit].to_s,
'X-RateLimit-Remaining' => '0',
'X-RateLimit-Reset' => (now + (match_data[:period] - now.to_i % match_data[:period])).iso8601(6),
}
[429, headers, [{ error: I18n.t('errors.429') }.to_json]]
end
end
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