Turnstile is a Redis-based library that can accurately track total number of concurrent users accessing a web/API based server application. It can break it down by "platform" or a device type, and returns data in JSON, CSV of NAD formats. While user tracking may happen synchronously using a Rack middleware, another method is provided that is based on log file analysis, and can therefore be performed outside web server process.

Provides and easy to use model wrapping Yelp Business

YJ系列开源工具

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