Limiter.dev enables building rate limits for your application with ease. It provides a simple interface to define rate limits and track usage.
Before using the gem you must register at https://limiter.dev and generate an token to interact with the api. Thereafter, add the token to app's environment variable
LIMITER_TOKEN: [GENERATED TOKEN]
In the Gemfile add the following
gem "limiter-ruby"In the config/initializers/limiter.rb file add the following
Limiter.configure do |config|
config.api_token = ENV["LIMITER_TOKEN"]
config.raise_errors = true
endSample API controller that checks the rate limit for the current user and increments the request count
class ApiController < ApplicationController
before_action :rate_limit
def index
# Good to continue
end
private
def rate_limit
# check the rate limit for the current user and increment the request count
rate_limit = limiter.check(current_user.id)
if rate_limit.exceeded?
render json: { error: "Rate limit exceeded" }, status: :too_many_requests
end
end
# Allow 120 requests per minute
def limiter
Limiter::Client.new(namespace: "openai", limit: 120, interval: 1.minute)
end
endSample ActiveJob that checks the rate limit for the shop and updates the request count
class DataSyncJob < ApplicationJob
queue_as :default
def perform
rate_limit = limiter.check(shop.id)
if rate_limit.exhausted?
self.class.set(wait: rate_limit.resets_in).perform_later
return
end
# continue the action
response = ... # query_cost = 100
limiter.used(response.query_cost) # mark 100 points used
end
# Allow 1000 points per minute
def limiter
Limiter::Points.new(namespace: "shopify", limit: 1000, interval: 20.seconds)
end
end